C#图片处理
2012-12-20 10:13
127 查看
-----------------------------------------图片的缩放
<%@ Page Debug ="true" Language="c#" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<html>
<head>
<script language="c#" runat="server">
//页面载入事件
public void Page_Load(object sender,System.EventArgs e)
{
//定义图片标志
string pys_pic;
pys_pic="";
//定义文件夹名称
string pys_dir;
pys_dir=DateTime.Now.Year.ToString();
//定义文件名前部分，以免上传文件因文件名重复而覆盖
string pys_filename;
//如果客户端已经上传文件，则保存
if (!IsPostBack)
{
LiuXi.Text="等待上传";
}
else
{
//检查是否有文章id，如果没有，则处理
if (Request["pysid"]==null | Request["pysid"]=="")
{
strStatus.Text="<font color=red>发生错误，您没有从正当途径进入该页面，请关闭本页面！</font>";
}
else
{
//遍历File表单元素
System.Web.HttpFileCollection files=System.Web.HttpContext.Current.Request.Files;
//状态信息
System.Text.StringBuilder strMsg=new System.Text.StringBuilder("<font color=red>上传的文件信息分别为：</font><hr size=1 color=blue>");
int fileCount;
int filecount=files.Count;
//储存上传图片的客户端地址，以便检测上传图片的大小
string imgPath;
//检查上传文件是否图片
string pys_type;
//保存图片生成缩略图的宽度
int pys_width;
try
{
//数据库连接字符串
string ConnectionString="server=(local);database=csc;uid=forcool;pwd=";
string Sql="select * from upfile";
//创建SqlConnection对象
SqlConnection thisConnection=new SqlConnection(ConnectionString);
//创建DataAdaper对象并初始化
SqlDataAdapter adapter=new SqlDataAdapter(Sql,thisConnection);
//创建DataSet对象
DataSet data=new DataSet();
//创建SqlCommandBuilder对象,并和SqlDataAdapter关联
SqlCommandBuilder builder=new SqlCommandBuilder(adapter);
adapter.Fill(data,"upfile");
for(fileCount=0;fileCount<files.Count;fileCount++)
{
//定义访问客户端上传文件的个数
System.Web.HttpPostedFile postedFile=files[fileCount];
string fileName,fileExtension;
//取得上传的文件名
fileName=System.IO.Path.GetFileName(postedFile.FileName);
if (fileName!=String.Empty)
{
//取得文件扩展名
fileExtension=System.IO.Path.GetExtension(fileName);
//上传的文件信息
strMsg.Append("<font color=red><b>"+(fileCount+1)+".</b></font>");
strMsg.Append("上传的文件类型："+postedFile.ContentType.ToString()+"<br>");
strMsg.Append("客户端文件地址："+postedFile.FileName+"<br>");
strMsg.Append("上传文件的文件名："+fileName+"<br>");
strMsg.Append("上传文件的扩展名："+fileExtension+"<br>");
strMsg.Append("上传文件的大小："+postedFile.ContentLength+"<br>");
//按当前时间（精确到毫秒）给文件命名，不取中文名，避免编码错误而无法下载或显示
pys_filename=DateTime.Now.Year.ToString()+DateTime.Now.Month.ToString()+DateTime.Now.Day.ToString()+DateTime.Now.Hour.ToString()+DateTime.Now.Minute.ToString()+DateTime.Now.Second.ToString()+DateTime.Now.Millisecond.ToString();
//创建随机数对象
Random rnd=new Random();
//调用Next方法产生随机数
pys_filename+=rnd.Next(1,100000).ToString();
pys_filename+="-";
pys_filename+=fileCount;
pys_filename=Request.QueryString["pysid"]+"-"+pys_filename;
pys_type=fileExtension;
pys_type=pys_type.ToLower();
//给缩略图宽度赋初值
pys_width=0;
//如果是图片则检查大小，如果图片过大则生成缩略图
if (pys_type==".jpg" | pys_type==".gif" | pys_type==".bmp" | pys_type==".png")
{
pys_pic="是";
//取得上传图片的路径
imgPath=postedFile.FileName;
//针对选择的图片建立Image对象
System.Drawing.Image image=System.Drawing.Image.FromFile(imgPath);
//使用Image对象的Height and Width属性取得图片的高度和宽度
strMsg.Append("上传图片的高度："+image.Height.ToString()+"<br>");
strMsg.Append("上传图片的宽度："+image.Width.ToString()+"<br>");
//如果上传的图片超过了100KB
if (postedFile.ContentLength>100000 || image.Width>400)
{
//生成缩略图
System.Drawing.Image.GetThumbnailImageAbort callb=null;
pys_width=(image.Height)*200/(image.Width);
System.Drawing.Image newimage=image.GetThumbnailImage(200,pys_width,callb,new System.IntPtr());
//保存缩略图
newimage.Save(Server.MapPath(""+pys_dir+"\\small-")+pys_filename+fileExtension);
//释放newimage对象占用的资源
//对图形压缩处理
pys_width=(image.Height)*400/(image.Width);
newimage=image.GetThumbnailImage(400,pys_width,callb,new System.IntPtr());
//保存压缩图
newimage.Save(Server.MapPath(""+pys_dir+"\\")+pys_filename+fileExtension);
//释放newimage对象占用的资源
newimage.Dispose();
strMsg.Append("上传的图片大小超过了100KB，为了不影响拨号上网单位的浏览速度，已对该图生成缩略图。<br>");
}
//释放image占用的资源
image.Dispose();
}
strMsg.Append("<hr size=1 color=blue>");
//在DataSet中添加上传的文件信息
DataRow newRow=data.Tables["upfile"].NewRow();
newRow["pysid"]=Request["pysid"];
newRow["文件名称"]=fileName;
newRow["文件类型"]=fileExtension;
newRow["文件大小"]=postedFile.ContentLength;
newRow["文件位置"]=pys_dir+"/"+pys_filename+fileExtension;
if (pys_width>0)
{
newRow["缩略图位置"]=pys_dir+"/small-"+pys_filename+fileExtension;
}
data.Tables["upfile"].Rows.Add(newRow);
------------------------------------------裁剪,缩放,清晰度,水印
封装了几个通用的方法：
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
namespace WuJian.Common
{
public class Image
{
#region 正方型裁剪并缩放
/// <summary>
/// 正方型裁剪
/// 以图片中心为轴心，截取正方型，然后等比缩放
/// 用于头像处理
/// </summary>
/// <remarks>吴剑 2012-08-08</remarks>
/// <param name="fromFile">原图Stream对象</param>
/// <param name="fileSaveUrl">缩略图存放地址</param>
/// <param name="side">指定的边长（正方型）</param>
/// <param name="quality">质量（范围0-100）</param>
public static void CutForSquare(System.IO.Stream fromFile, string fileSaveUrl, int side, int quality)
{
//创建目录
string dir = Path.GetDirectoryName(fileSaveUrl);
if (!Directory.Exists(dir))
Directory.CreateDirectory(dir);
//原始图片（获取原始图片创建对象，并使用流中嵌入的颜色管理信息）
System.Drawing.Image initImage = System.Drawing.Image.FromStream(fromFile, true);
//原图宽高均小于模版，不作处理，直接保存
if (initImage.Width <= side && initImage.Height <= side)
{
initImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
//原始图片的宽、高
int initWidth = initImage.Width;
int initHeight = initImage.Height;
//非正方型先裁剪为正方型
if (initWidth != initHeight)
{
//截图对象
System.Drawing.Image pickedImage = null;
System.Drawing.Graphics pickedG = null;
//宽大于高的横图
if (initWidth > initHeight)
{
//对象实例化
pickedImage = new System.Drawing.Bitmap(initHeight, initHeight);
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
//设置质量
pickedG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
pickedG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//定位
Rectangle fromR = new Rectangle((initWidth - initHeight) / 2, 0, initHeight, initHeight);
Rectangle toR = new Rectangle(0, 0, initHeight, initHeight);
//画图
pickedG.DrawImage(initImage, toR, fromR, System.Drawing.GraphicsUnit.Pixel);
//重置宽
initWidth = initHeight;
}
//高大于宽的竖图
else
{
//对象实例化
pickedImage = new System.Drawing.Bitmap(initWidth, initWidth);
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
//设置质量
pickedG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
pickedG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//定位
Rectangle fromR = new Rectangle(0, (initHeight - initWidth) / 2, initWidth, initWidth);
Rectangle toR = new Rectangle(0, 0, initWidth, initWidth);
//画图
pickedG.DrawImage(initImage, toR, fromR, System.Drawing.GraphicsUnit.Pixel);
//重置高
initHeight = initWidth;
}
//将截图对象赋给原图
initImage = (System.Drawing.Image)pickedImage.Clone();
//释放截图资源
pickedG.Dispose();
pickedImage.Dispose();
}
//缩略图对象
System.Drawing.Image resultImage = new System.Drawing.Bitmap(side, side);
System.Drawing.Graphics resultG = System.Drawing.Graphics.FromImage(resultImage);
//设置质量
resultG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
resultG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//用指定背景色清空画布
resultG.Clear(Color.White);
//绘制缩略图
resultG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, side, side), new System.Drawing.Rectangle(0, 0, initWidth, initHeight), System.Drawing.GraphicsUnit.Pixel);
//关键质量控制
//获取系统编码类型数组,包含了jpeg,bmp,png,gif,tiff
ImageCodecInfo[] icis = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo i in icis)
{
if (i.MimeType == "image/jpeg" || i.MimeType == "image/bmp" || i.MimeType == "image/png" || i.MimeType == "image/gif")
{
ici = i;
}
}
EncoderParameters ep = new EncoderParameters(1);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)quality);
//保存缩略图
resultImage.Save(fileSaveUrl, ici, ep);
//释放关键质量控制所用资源
ep.Dispose();
//释放缩略图资源
resultG.Dispose();
resultImage.Dispose();
//释放原始图片资源
initImage.Dispose();
}
}
#endregion
#region 自定义裁剪并缩放
/// <summary>
/// 指定长宽裁剪
/// 按模版比例最大范围的裁剪图片并缩放至模版尺寸
/// </summary>
/// <remarks>吴剑 2012-08-08</remarks>
/// <param name="fromFile">原图Stream对象</param>
/// <param name="fileSaveUrl">保存路径</param>
/// <param name="maxWidth">最大宽(单位:px)</param>
/// <param name="maxHeight">最大高(单位:px)</param>
/// <param name="quality">质量（范围0-100）</param>
public static void CutForCustom(System.IO.Stream fromFile, string fileSaveUrl, int maxWidth, int maxHeight, int quality)
{
//从文件获取原始图片，并使用流中嵌入的颜色管理信息
System.Drawing.Image initImage = System.Drawing.Image.FromStream(fromFile, true);
//原图宽高均小于模版，不作处理，直接保存
if (initImage.Width <= maxWidth && initImage.Height <= maxHeight)
{
initImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
//模版的宽高比例
double templateRate = (double)maxWidth / maxHeight;
//原图片的宽高比例
double initRate = (double)initImage.Width / initImage.Height;
//原图与模版比例相等，直接缩放
if (templateRate == initRate)
{
//按模版大小生成最终图片
System.Drawing.Image templateImage = new System.Drawing.Bitmap(maxWidth, maxHeight);
System.Drawing.Graphics templateG = System.Drawing.Graphics.FromImage(templateImage);
templateG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
templateG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
templateG.Clear(Color.White);
templateG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, maxWidth, maxHeight), new System.Drawing.Rectangle(0, 0, initImage.Width, initImage.Height), System.Drawing.GraphicsUnit.Pixel);
templateImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
}
//原图与模版比例不等，裁剪后缩放
else
{
//裁剪对象
System.Drawing.Image pickedImage = null;
System.Drawing.Graphics pickedG = null;
//定位
Rectangle fromR = new Rectangle(0, 0, 0, 0);//原图裁剪定位
Rectangle toR = new Rectangle(0, 0, 0, 0);//目标定位
//宽为标准进行裁剪
if (templateRate > initRate)
{
//裁剪对象实例化
pickedImage = new System.Drawing.Bitmap(initImage.Width, (int)System.Math.Floor(initImage.Width / templateRate));
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
//裁剪源定位
fromR.X = 0;
fromR.Y = (int)System.Math.Floor((initImage.Height - initImage.Width / templateRate) / 2);
fromR.Width = initImage.Width;
fromR.Height = (int)System.Math.Floor(initImage.Width / templateRate);
//裁剪目标定位
toR.X = 0;
toR.Y = 0;
toR.Width = initImage.Width;
toR.Height = (int)System.Math.Floor(initImage.Width / templateRate);
}
//高为标准进行裁剪
else
{
pickedImage = new System.Drawing.Bitmap((int)System.Math.Floor(initImage.Height * templateRate), initImage.Height);
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
fromR.X = (int)System.Math.Floor((initImage.Width - initImage.Height * templateRate) / 2);
fromR.Y = 0;
fromR.Width = (int)System.Math.Floor(initImage.Height * templateRate);
fromR.Height = initImage.Height;
toR.X = 0;
toR.Y = 0;
toR.Width = (int)System.Math.Floor(initImage.Height * templateRate);
toR.Height = initImage.Height;
}
//设置质量
pickedG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
pickedG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//裁剪
pickedG.DrawImage(initImage, toR, fromR, System.Drawing.GraphicsUnit.Pixel);
//按模版大小生成最终图片
System.Drawing.Image templateImage = new System.Drawing.Bitmap(maxWidth, maxHeight);
System.Drawing.Graphics templateG = System.Drawing.Graphics.FromImage(templateImage);
templateG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
templateG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
templateG.Clear(Color.White);
templateG.DrawImage(pickedImage, new System.Drawing.Rectangle(0, 0, maxWidth, maxHeight), new System.Drawing.Rectangle(0, 0, pickedImage.Width, pickedImage.Height), System.Drawing.GraphicsUnit.Pixel);
//关键质量控制
//获取系统编码类型数组,包含了jpeg,bmp,png,gif,tiff
ImageCodecInfo[] icis = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo i in icis)
{
if (i.MimeType == "image/jpeg" || i.MimeType == "image/bmp" || i.MimeType == "image/png" || i.MimeType == "image/gif")
{
ici = i;
}
}
EncoderParameters ep = new EncoderParameters(1);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)quality);
//保存缩略图
templateImage.Save(fileSaveUrl, ici, ep);
//templateImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
//释放资源
templateG.Dispose();
templateImage.Dispose();
pickedG.Dispose();
pickedImage.Dispose();
}
}
//释放资源
initImage.Dispose();
}
#endregion
#region 等比缩放
/// <summary>
/// 图片等比缩放
/// </summary>
/// <param name="fromFile">原图Stream对象</param>
/// <param name="savePath">缩略图存放地址</param>
/// <param name="targetWidth">指定的最大宽度</param>
/// <param name="targetHeight">指定的最大高度</param>
/// <param name="watermarkText">水印文字(为""表示不使用水印)</param>
/// <param name="watermarkImage">水印图片路径(为""表示不使用水印)</param>
public static void ZoomAuto(System.IO.Stream fromFile, string savePath, System.Double targetWidth, System.Double targetHeight, string watermarkText, string watermarkImage)
{
//创建目录
string dir = Path.GetDirectoryName(savePath);
if (!Directory.Exists(dir))
Directory.CreateDirectory(dir);
//原始图片（获取原始图片创建对象，并使用流中嵌入的颜色管理信息）
System.Drawing.Image initImage = System.Drawing.Image.FromStream(fromFile, true);
//原图宽高均小于模版，不作处理，直接保存
if (initImage.Width <= targetWidth && initImage.Height <= targetHeight)
{
//文字水印
if (watermarkText != "")
{
using (System.Drawing.Graphics gWater = System.Drawing.Graphics.FromImage(initImage))
{
System.Drawing.Font fontWater = new Font("黑体", 10);
System.Drawing.Brush brushWater = new SolidBrush(Color.White);
gWater.DrawString(watermarkText, fontWater, brushWater, 10, 10);
gWater.Dispose();
}
}
//透明图片水印
if (watermarkImage != "")
{
if (File.Exists(watermarkImage))
{
//获取水印图片
using (System.Drawing.Image wrImage = System.Drawing.Image.FromFile(watermarkImage))
{
//水印绘制条件：原始图片宽高均大于或等于水印图片
if (initImage.Width >= wrImage.Width && initImage.Height >= wrImage.Height)
{
Graphics gWater = Graphics.FromImage(initImage);
//透明属性
ImageAttributes imgAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imgAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.5f, 0.0f},//透明度:0.5
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
imgAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
gWater.DrawImage(wrImage, new Rectangle(initImage.Width - wrImage.Width, initImage.Height - wrImage.Height, wrImage.Width, wrImage.Height), 0, 0, wrImage.Width, wrImage.Height, GraphicsUnit.Pixel, imgAttributes);
gWater.Dispose();
}
wrImage.Dispose();
}
}
}
//保存
initImage.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
//缩略图宽、高计算
double newWidth = initImage.Width;
double newHeight = initImage.Height;
//宽大于高或宽等于高（横图或正方）
if (initImage.Width > initImage.Height || initImage.Width == initImage.Height)
{
//如果宽大于模版
if (initImage.Width > targetWidth)
{
//宽按模版，高按比例缩放
newWidth = targetWidth;
newHeight = initImage.Height * (targetWidth / initImage.Width);
}
}
//高大于宽（竖图）
else
{
//如果高大于模版
if (initImage.Height > targetHeight)
{
//高按模版，宽按比例缩放
newHeight = targetHeight;
newWidth = initImage.Width * (targetHeight / initImage.Height);
}
}
//生成新图
//新建一个bmp图片
System.Drawing.Image newImage = new System.Drawing.Bitmap((int)newWidth, (int)newHeight);
//新建一个画板
System.Drawing.Graphics newG = System.Drawing.Graphics.FromImage(newImage);
//设置质量
newG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
newG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//置背景色
newG.Clear(Color.White);
//画图
newG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, newImage.Width, newImage.Height), new System.Drawing.Rectangle(0, 0, initImage.Width, initImage.Height), System.Drawing.GraphicsUnit.Pixel);
//文字水印
if (watermarkText != "")
{
using (System.Drawing.Graphics gWater = System.Drawing.Graphics.FromImage(newImage))
{
System.Drawing.Font fontWater = new Font("宋体", 10);
System.Drawing.Brush brushWater = new SolidBrush(Color.White);
gWater.DrawString(watermarkText, fontWater, brushWater, 10, 10);
gWater.Dispose();
}
}
//透明图片水印
if (watermarkImage != "")
{
if (File.Exists(watermarkImage))
{
//获取水印图片
using (System.Drawing.Image wrImage = System.Drawing.Image.FromFile(watermarkImage))
{
//水印绘制条件：原始图片宽高均大于或等于水印图片
if (newImage.Width >= wrImage.Width && newImage.Height >= wrImage.Height)
{
Graphics gWater = Graphics.FromImage(newImage);
//透明属性
ImageAttributes imgAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imgAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.5f, 0.0f},//透明度:0.5
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
imgAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
gWater.DrawImage(wrImage, new Rectangle(newImage.Width - wrImage.Width, newImage.Height - wrImage.Height, wrImage.Width, wrImage.Height), 0, 0, wrImage.Width, wrImage.Height, GraphicsUnit.Pixel, imgAttributes);
gWater.Dispose();
}
wrImage.Dispose();
}
}
}
//保存缩略图
newImage.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg);
//释放资源
newG.Dispose();
newImage.Dispose();
initImage.Dispose();
}
}
#endregion
#region 其它
/// <summary>
/// 判断文件类型是否为WEB格式图片
/// (注：JPG,GIF,BMP,PNG)
/// </summary>
/// <param name="contentType">HttpPostedFile.ContentType</param>
/// <returns></returns>
public static bool IsWebImage(string contentType)
{
if (contentType == "image/pjpeg" || contentType == "image/jpeg" || contentType == "image/gif" || contentType == "image/bmp" || contentType == "image/png")
{
return true;
}
else
{
return false;
}
}
#endregion
}//end class
}
<%@ Page Debug ="true" Language="c#" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<html>
<head>
<script language="c#" runat="server">
//页面载入事件
public void Page_Load(object sender,System.EventArgs e)
{
//定义图片标志
string pys_pic;
pys_pic="";
//定义文件夹名称
string pys_dir;
pys_dir=DateTime.Now.Year.ToString();
//定义文件名前部分，以免上传文件因文件名重复而覆盖
string pys_filename;
//如果客户端已经上传文件，则保存
if (!IsPostBack)
{
LiuXi.Text="等待上传";
}
else
{
//检查是否有文章id，如果没有，则处理
if (Request["pysid"]==null | Request["pysid"]=="")
{
strStatus.Text="<font color=red>发生错误，您没有从正当途径进入该页面，请关闭本页面！</font>";
}
else
{
//遍历File表单元素
System.Web.HttpFileCollection files=System.Web.HttpContext.Current.Request.Files;
//状态信息
System.Text.StringBuilder strMsg=new System.Text.StringBuilder("<font color=red>上传的文件信息分别为：</font><hr size=1 color=blue>");
int fileCount;
int filecount=files.Count;
//储存上传图片的客户端地址，以便检测上传图片的大小
string imgPath;
//检查上传文件是否图片
string pys_type;
//保存图片生成缩略图的宽度
int pys_width;
try
{
//数据库连接字符串
string ConnectionString="server=(local);database=csc;uid=forcool;pwd=";
string Sql="select * from upfile";
//创建SqlConnection对象
SqlConnection thisConnection=new SqlConnection(ConnectionString);
//创建DataAdaper对象并初始化
SqlDataAdapter adapter=new SqlDataAdapter(Sql,thisConnection);
//创建DataSet对象
DataSet data=new DataSet();
//创建SqlCommandBuilder对象,并和SqlDataAdapter关联
SqlCommandBuilder builder=new SqlCommandBuilder(adapter);
adapter.Fill(data,"upfile");
for(fileCount=0;fileCount<files.Count;fileCount++)
{
//定义访问客户端上传文件的个数
System.Web.HttpPostedFile postedFile=files[fileCount];
string fileName,fileExtension;
//取得上传的文件名
fileName=System.IO.Path.GetFileName(postedFile.FileName);
if (fileName!=String.Empty)
{
//取得文件扩展名
fileExtension=System.IO.Path.GetExtension(fileName);
//上传的文件信息
strMsg.Append("<font color=red><b>"+(fileCount+1)+".</b></font>");
strMsg.Append("上传的文件类型："+postedFile.ContentType.ToString()+"<br>");
strMsg.Append("客户端文件地址："+postedFile.FileName+"<br>");
strMsg.Append("上传文件的文件名："+fileName+"<br>");
strMsg.Append("上传文件的扩展名："+fileExtension+"<br>");
strMsg.Append("上传文件的大小："+postedFile.ContentLength+"<br>");
//按当前时间（精确到毫秒）给文件命名，不取中文名，避免编码错误而无法下载或显示
pys_filename=DateTime.Now.Year.ToString()+DateTime.Now.Month.ToString()+DateTime.Now.Day.ToString()+DateTime.Now.Hour.ToString()+DateTime.Now.Minute.ToString()+DateTime.Now.Second.ToString()+DateTime.Now.Millisecond.ToString();
//创建随机数对象
Random rnd=new Random();
//调用Next方法产生随机数
pys_filename+=rnd.Next(1,100000).ToString();
pys_filename+="-";
pys_filename+=fileCount;
pys_filename=Request.QueryString["pysid"]+"-"+pys_filename;
pys_type=fileExtension;
pys_type=pys_type.ToLower();
//给缩略图宽度赋初值
pys_width=0;
//如果是图片则检查大小，如果图片过大则生成缩略图
if (pys_type==".jpg" | pys_type==".gif" | pys_type==".bmp" | pys_type==".png")
{
pys_pic="是";
//取得上传图片的路径
imgPath=postedFile.FileName;
//针对选择的图片建立Image对象
System.Drawing.Image image=System.Drawing.Image.FromFile(imgPath);
//使用Image对象的Height and Width属性取得图片的高度和宽度
strMsg.Append("上传图片的高度："+image.Height.ToString()+"<br>");
strMsg.Append("上传图片的宽度："+image.Width.ToString()+"<br>");
//如果上传的图片超过了100KB
if (postedFile.ContentLength>100000 || image.Width>400)
{
//生成缩略图
System.Drawing.Image.GetThumbnailImageAbort callb=null;
pys_width=(image.Height)*200/(image.Width);
System.Drawing.Image newimage=image.GetThumbnailImage(200,pys_width,callb,new System.IntPtr());
//保存缩略图
newimage.Save(Server.MapPath(""+pys_dir+"\\small-")+pys_filename+fileExtension);
//释放newimage对象占用的资源
//对图形压缩处理
pys_width=(image.Height)*400/(image.Width);
newimage=image.GetThumbnailImage(400,pys_width,callb,new System.IntPtr());
//保存压缩图
newimage.Save(Server.MapPath(""+pys_dir+"\\")+pys_filename+fileExtension);
//释放newimage对象占用的资源
newimage.Dispose();
strMsg.Append("上传的图片大小超过了100KB，为了不影响拨号上网单位的浏览速度，已对该图生成缩略图。<br>");
}
//释放image占用的资源
image.Dispose();
}
strMsg.Append("<hr size=1 color=blue>");
//在DataSet中添加上传的文件信息
DataRow newRow=data.Tables["upfile"].NewRow();
newRow["pysid"]=Request["pysid"];
newRow["文件名称"]=fileName;
newRow["文件类型"]=fileExtension;
newRow["文件大小"]=postedFile.ContentLength;
newRow["文件位置"]=pys_dir+"/"+pys_filename+fileExtension;
if (pys_width>0)
{
newRow["缩略图位置"]=pys_dir+"/small-"+pys_filename+fileExtension;
}
data.Tables["upfile"].Rows.Add(newRow);
------------------------------------------裁剪,缩放,清晰度,水印
封装了几个通用的方法：
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
namespace WuJian.Common
{
public class Image
{
#region 正方型裁剪并缩放
/// <summary>
/// 正方型裁剪
/// 以图片中心为轴心，截取正方型，然后等比缩放
/// 用于头像处理
/// </summary>
/// <remarks>吴剑 2012-08-08</remarks>
/// <param name="fromFile">原图Stream对象</param>
/// <param name="fileSaveUrl">缩略图存放地址</param>
/// <param name="side">指定的边长（正方型）</param>
/// <param name="quality">质量（范围0-100）</param>
public static void CutForSquare(System.IO.Stream fromFile, string fileSaveUrl, int side, int quality)
{
//创建目录
string dir = Path.GetDirectoryName(fileSaveUrl);
if (!Directory.Exists(dir))
Directory.CreateDirectory(dir);
//原始图片（获取原始图片创建对象，并使用流中嵌入的颜色管理信息）
System.Drawing.Image initImage = System.Drawing.Image.FromStream(fromFile, true);
//原图宽高均小于模版，不作处理，直接保存
if (initImage.Width <= side && initImage.Height <= side)
{
initImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
//原始图片的宽、高
int initWidth = initImage.Width;
int initHeight = initImage.Height;
//非正方型先裁剪为正方型
if (initWidth != initHeight)
{
//截图对象
System.Drawing.Image pickedImage = null;
System.Drawing.Graphics pickedG = null;
//宽大于高的横图
if (initWidth > initHeight)
{
//对象实例化
pickedImage = new System.Drawing.Bitmap(initHeight, initHeight);
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
//设置质量
pickedG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
pickedG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//定位
Rectangle fromR = new Rectangle((initWidth - initHeight) / 2, 0, initHeight, initHeight);
Rectangle toR = new Rectangle(0, 0, initHeight, initHeight);
//画图
pickedG.DrawImage(initImage, toR, fromR, System.Drawing.GraphicsUnit.Pixel);
//重置宽
initWidth = initHeight;
}
//高大于宽的竖图
else
{
//对象实例化
pickedImage = new System.Drawing.Bitmap(initWidth, initWidth);
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
//设置质量
pickedG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
pickedG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//定位
Rectangle fromR = new Rectangle(0, (initHeight - initWidth) / 2, initWidth, initWidth);
Rectangle toR = new Rectangle(0, 0, initWidth, initWidth);
//画图
pickedG.DrawImage(initImage, toR, fromR, System.Drawing.GraphicsUnit.Pixel);
//重置高
initHeight = initWidth;
}
//将截图对象赋给原图
initImage = (System.Drawing.Image)pickedImage.Clone();
//释放截图资源
pickedG.Dispose();
pickedImage.Dispose();
}
//缩略图对象
System.Drawing.Image resultImage = new System.Drawing.Bitmap(side, side);
System.Drawing.Graphics resultG = System.Drawing.Graphics.FromImage(resultImage);
//设置质量
resultG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
resultG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//用指定背景色清空画布
resultG.Clear(Color.White);
//绘制缩略图
resultG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, side, side), new System.Drawing.Rectangle(0, 0, initWidth, initHeight), System.Drawing.GraphicsUnit.Pixel);
//关键质量控制
//获取系统编码类型数组,包含了jpeg,bmp,png,gif,tiff
ImageCodecInfo[] icis = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo i in icis)
{
if (i.MimeType == "image/jpeg" || i.MimeType == "image/bmp" || i.MimeType == "image/png" || i.MimeType == "image/gif")
{
ici = i;
}
}
EncoderParameters ep = new EncoderParameters(1);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)quality);
//保存缩略图
resultImage.Save(fileSaveUrl, ici, ep);
//释放关键质量控制所用资源
ep.Dispose();
//释放缩略图资源
resultG.Dispose();
resultImage.Dispose();
//释放原始图片资源
initImage.Dispose();
}
}
#endregion
#region 自定义裁剪并缩放
/// <summary>
/// 指定长宽裁剪
/// 按模版比例最大范围的裁剪图片并缩放至模版尺寸
/// </summary>
/// <remarks>吴剑 2012-08-08</remarks>
/// <param name="fromFile">原图Stream对象</param>
/// <param name="fileSaveUrl">保存路径</param>
/// <param name="maxWidth">最大宽(单位:px)</param>
/// <param name="maxHeight">最大高(单位:px)</param>
/// <param name="quality">质量（范围0-100）</param>
public static void CutForCustom(System.IO.Stream fromFile, string fileSaveUrl, int maxWidth, int maxHeight, int quality)
{
//从文件获取原始图片，并使用流中嵌入的颜色管理信息
System.Drawing.Image initImage = System.Drawing.Image.FromStream(fromFile, true);
//原图宽高均小于模版，不作处理，直接保存
if (initImage.Width <= maxWidth && initImage.Height <= maxHeight)
{
initImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
//模版的宽高比例
double templateRate = (double)maxWidth / maxHeight;
//原图片的宽高比例
double initRate = (double)initImage.Width / initImage.Height;
//原图与模版比例相等，直接缩放
if (templateRate == initRate)
{
//按模版大小生成最终图片
System.Drawing.Image templateImage = new System.Drawing.Bitmap(maxWidth, maxHeight);
System.Drawing.Graphics templateG = System.Drawing.Graphics.FromImage(templateImage);
templateG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
templateG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
templateG.Clear(Color.White);
templateG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, maxWidth, maxHeight), new System.Drawing.Rectangle(0, 0, initImage.Width, initImage.Height), System.Drawing.GraphicsUnit.Pixel);
templateImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
}
//原图与模版比例不等，裁剪后缩放
else
{
//裁剪对象
System.Drawing.Image pickedImage = null;
System.Drawing.Graphics pickedG = null;
//定位
Rectangle fromR = new Rectangle(0, 0, 0, 0);//原图裁剪定位
Rectangle toR = new Rectangle(0, 0, 0, 0);//目标定位
//宽为标准进行裁剪
if (templateRate > initRate)
{
//裁剪对象实例化
pickedImage = new System.Drawing.Bitmap(initImage.Width, (int)System.Math.Floor(initImage.Width / templateRate));
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
//裁剪源定位
fromR.X = 0;
fromR.Y = (int)System.Math.Floor((initImage.Height - initImage.Width / templateRate) / 2);
fromR.Width = initImage.Width;
fromR.Height = (int)System.Math.Floor(initImage.Width / templateRate);
//裁剪目标定位
toR.X = 0;
toR.Y = 0;
toR.Width = initImage.Width;
toR.Height = (int)System.Math.Floor(initImage.Width / templateRate);
}
//高为标准进行裁剪
else
{
pickedImage = new System.Drawing.Bitmap((int)System.Math.Floor(initImage.Height * templateRate), initImage.Height);
pickedG = System.Drawing.Graphics.FromImage(pickedImage);
fromR.X = (int)System.Math.Floor((initImage.Width - initImage.Height * templateRate) / 2);
fromR.Y = 0;
fromR.Width = (int)System.Math.Floor(initImage.Height * templateRate);
fromR.Height = initImage.Height;
toR.X = 0;
toR.Y = 0;
toR.Width = (int)System.Math.Floor(initImage.Height * templateRate);
toR.Height = initImage.Height;
}
//设置质量
pickedG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
pickedG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//裁剪
pickedG.DrawImage(initImage, toR, fromR, System.Drawing.GraphicsUnit.Pixel);
//按模版大小生成最终图片
System.Drawing.Image templateImage = new System.Drawing.Bitmap(maxWidth, maxHeight);
System.Drawing.Graphics templateG = System.Drawing.Graphics.FromImage(templateImage);
templateG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
templateG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
templateG.Clear(Color.White);
templateG.DrawImage(pickedImage, new System.Drawing.Rectangle(0, 0, maxWidth, maxHeight), new System.Drawing.Rectangle(0, 0, pickedImage.Width, pickedImage.Height), System.Drawing.GraphicsUnit.Pixel);
//关键质量控制
//获取系统编码类型数组,包含了jpeg,bmp,png,gif,tiff
ImageCodecInfo[] icis = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo i in icis)
{
if (i.MimeType == "image/jpeg" || i.MimeType == "image/bmp" || i.MimeType == "image/png" || i.MimeType == "image/gif")
{
ici = i;
}
}
EncoderParameters ep = new EncoderParameters(1);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)quality);
//保存缩略图
templateImage.Save(fileSaveUrl, ici, ep);
//templateImage.Save(fileSaveUrl, System.Drawing.Imaging.ImageFormat.Jpeg);
//释放资源
templateG.Dispose();
templateImage.Dispose();
pickedG.Dispose();
pickedImage.Dispose();
}
}
//释放资源
initImage.Dispose();
}
#endregion
#region 等比缩放
/// <summary>
/// 图片等比缩放
/// </summary>
/// <param name="fromFile">原图Stream对象</param>
/// <param name="savePath">缩略图存放地址</param>
/// <param name="targetWidth">指定的最大宽度</param>
/// <param name="targetHeight">指定的最大高度</param>
/// <param name="watermarkText">水印文字(为""表示不使用水印)</param>
/// <param name="watermarkImage">水印图片路径(为""表示不使用水印)</param>
public static void ZoomAuto(System.IO.Stream fromFile, string savePath, System.Double targetWidth, System.Double targetHeight, string watermarkText, string watermarkImage)
{
//创建目录
string dir = Path.GetDirectoryName(savePath);
if (!Directory.Exists(dir))
Directory.CreateDirectory(dir);
//原始图片（获取原始图片创建对象，并使用流中嵌入的颜色管理信息）
System.Drawing.Image initImage = System.Drawing.Image.FromStream(fromFile, true);
//原图宽高均小于模版，不作处理，直接保存
if (initImage.Width <= targetWidth && initImage.Height <= targetHeight)
{
//文字水印
if (watermarkText != "")
{
using (System.Drawing.Graphics gWater = System.Drawing.Graphics.FromImage(initImage))
{
System.Drawing.Font fontWater = new Font("黑体", 10);
System.Drawing.Brush brushWater = new SolidBrush(Color.White);
gWater.DrawString(watermarkText, fontWater, brushWater, 10, 10);
gWater.Dispose();
}
}
//透明图片水印
if (watermarkImage != "")
{
if (File.Exists(watermarkImage))
{
//获取水印图片
using (System.Drawing.Image wrImage = System.Drawing.Image.FromFile(watermarkImage))
{
//水印绘制条件：原始图片宽高均大于或等于水印图片
if (initImage.Width >= wrImage.Width && initImage.Height >= wrImage.Height)
{
Graphics gWater = Graphics.FromImage(initImage);
//透明属性
ImageAttributes imgAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imgAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.5f, 0.0f},//透明度:0.5
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
imgAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
gWater.DrawImage(wrImage, new Rectangle(initImage.Width - wrImage.Width, initImage.Height - wrImage.Height, wrImage.Width, wrImage.Height), 0, 0, wrImage.Width, wrImage.Height, GraphicsUnit.Pixel, imgAttributes);
gWater.Dispose();
}
wrImage.Dispose();
}
}
}
//保存
initImage.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
//缩略图宽、高计算
double newWidth = initImage.Width;
double newHeight = initImage.Height;
//宽大于高或宽等于高（横图或正方）
if (initImage.Width > initImage.Height || initImage.Width == initImage.Height)
{
//如果宽大于模版
if (initImage.Width > targetWidth)
{
//宽按模版，高按比例缩放
newWidth = targetWidth;
newHeight = initImage.Height * (targetWidth / initImage.Width);
}
}
//高大于宽（竖图）
else
{
//如果高大于模版
if (initImage.Height > targetHeight)
{
//高按模版，宽按比例缩放
newHeight = targetHeight;
newWidth = initImage.Width * (targetHeight / initImage.Height);
}
}
//生成新图
//新建一个bmp图片
System.Drawing.Image newImage = new System.Drawing.Bitmap((int)newWidth, (int)newHeight);
//新建一个画板
System.Drawing.Graphics newG = System.Drawing.Graphics.FromImage(newImage);
//设置质量
newG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
newG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//置背景色
newG.Clear(Color.White);
//画图
newG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, newImage.Width, newImage.Height), new System.Drawing.Rectangle(0, 0, initImage.Width, initImage.Height), System.Drawing.GraphicsUnit.Pixel);
//文字水印
if (watermarkText != "")
{
using (System.Drawing.Graphics gWater = System.Drawing.Graphics.FromImage(newImage))
{
System.Drawing.Font fontWater = new Font("宋体", 10);
System.Drawing.Brush brushWater = new SolidBrush(Color.White);
gWater.DrawString(watermarkText, fontWater, brushWater, 10, 10);
gWater.Dispose();
}
}
//透明图片水印
if (watermarkImage != "")
{
if (File.Exists(watermarkImage))
{
//获取水印图片
using (System.Drawing.Image wrImage = System.Drawing.Image.FromFile(watermarkImage))
{
//水印绘制条件：原始图片宽高均大于或等于水印图片
if (newImage.Width >= wrImage.Width && newImage.Height >= wrImage.Height)
{
Graphics gWater = Graphics.FromImage(newImage);
//透明属性
ImageAttributes imgAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imgAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.5f, 0.0f},//透明度:0.5
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
imgAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
gWater.DrawImage(wrImage, new Rectangle(newImage.Width - wrImage.Width, newImage.Height - wrImage.Height, wrImage.Width, wrImage.Height), 0, 0, wrImage.Width, wrImage.Height, GraphicsUnit.Pixel, imgAttributes);
gWater.Dispose();
}
wrImage.Dispose();
}
}
}
//保存缩略图
newImage.Save(savePath, System.Drawing.Imaging.ImageFormat.Jpeg);
//释放资源
newG.Dispose();
newImage.Dispose();
initImage.Dispose();
}
}
#endregion
#region 其它
/// <summary>
/// 判断文件类型是否为WEB格式图片
/// (注：JPG,GIF,BMP,PNG)
/// </summary>
/// <param name="contentType">HttpPostedFile.ContentType</param>
/// <returns></returns>
public static bool IsWebImage(string contentType)
{
if (contentType == "image/pjpeg" || contentType == "image/jpeg" || contentType == "image/gif" || contentType == "image/bmp" || contentType == "image/png")
{
return true;
}
else
{
return false;
}
}
#endregion
}//end class
}
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