合并图片添加水印并压缩文件提供下载

dotNet疯狂之路No.30

 今天很残酷，明天更残酷，后天很美好，但是绝大部分人是死在明天晚上，只有那些真正的英雄才能见到后天的太阳。

 We're here to put a dent in the universe. Otherwise why else even be here?  

前几天公司急需一批台卡 生成带参数二维码 和背景图片合为一张图片 合成图片还需要加上水印  开始是美工一张张做 几千张哈哈累死美工了 老板要求写个生成功能 所以我就试水了

一、生成二维码部分(一次生成几千张 先保存下来备用)

/// <summary>
/// 保存批次二维码至本地//一次生成几千张 先保存下来备用
/// </summary>
/// <param name="code"></param>
/// <param name="name"></param>
public static void setBatchImg(string strCode, string batch,int i)
{

Bitmap bitmap = QRCodeEncoderUtil(strCode);//调用二维码编码方法生成位图

var ms = new MemoryStream();

bitmap.Save(ms, ImageFormat.Png);

String relPath = "/XXXX/XXXX/XXXX/XXXX" + batch + "/";//文件夹路径

string path = System.Web.HttpContext.Current.Server.MapPath(relPath);

if (!System.IO.Directory.Exists(path)) //如果文件夹不存在则创建
{
System.IO.Directory.CreateDirectory(path);
}
Log.WriteLog(path + batch + "_" + i + ".png");
bitmap.Save(path + batch + "_" + i + ".png", ImageFormat.Png);///二维码保存

}

/// <summary>
/// 生成二维码
/// </summary>
/// <param name="qrCodeContent">要编码的内容</param>
/// <returns>返回二维码位图</returns>
public static Bitmap QRCodeEncoderUtil(string qrCodeContent)
{
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
qrCodeEncoder.QRCodeVersion = 0;/// 数字越大二维码密集度越高

Bitmap img = qrCodeEncoder.Encode(qrCodeContent, Encoding.UTF8);//指定utf-8编码， 支持中文
return img;

}

二、调整二维码大小(适用背景图片上二维码区域)

string qrPath="XXXX/XXXX/XXXX/XXXX.png";

Bitmap b = new Bitmap(qrPath);
System.Drawing.Image i = resizeImage(b, new Size(width, height));// 调用调整方法进行调整 返回Image 保存至本地备用
string rePath = Server.MapPath("XXXXX") + "\\XXXX\\reqr.png";
i.Save(rePath);
i.Dispose();

//调整图像大小
private static System.Drawing.Image resizeImage(System.Drawing.Image imgToResize, Size size)
{
//获取图片宽度
int sourceWidth = imgToResize.Width;
//获取图片高度
int sourceHeight = imgToResize.Height;

float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;

//计算宽度的缩放比例
nPercentW = ((float)size.Width / (float)sourceWidth);

//计算高度的缩放比例
nPercentH = ((float)size.Height / (float)sourceHeight);

if (nPercentH < nPercentW)
nPercent = nPercentH;
else
nPercent = nPercentW;

//期望的宽度
int destWidth = (int)(sourceWidth * nPercent);

//期望的高度
int destHeight = (int)(sourceHeight * nPercent);

Bitmap b = new Bitmap(destWidth, destHeight);
Graphics g = Graphics.FromImage((System.Drawing.Image)b);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;

//绘制图像
g.DrawImage(imgToResize, 0, 0, destWidth, destHeight);
g.Dispose();
imgToResize.Dispose();
return (System.Drawing.Image)b;
}

三、合成图片二维码和背景合为一张图片

//图片合成函数(这里合成两张图片 可累加)
private void MergeImage(string strBg, string strQr, string name)
{

int x = 0;
int y = 0;

if (Custom.Value.ToString().Equals("1"))//是否开启自定义
{
x = int.Parse(imgx.Value) * 2;
y = int.Parse(imgy.Value) * 2;
}
else
{
x = int.Parse(imgx.Value);
y = int.Parse(imgy.Value);
}

// 数组元素个数(即要拼图的图片个数)
int lenth = 2;
// 图片集合
Bitmap[] maps = new Bitmap[lenth];
//图片对应纵坐标集合
int[] pointY = new int[lenth];
//读取本地图片初始化Bitmap
Bitmap map = null;

//第一个图片对象，背景图片
map = new Bitmap(strBg);
maps[0] = map;
pointY[0] = 0;

//第二个图片对象，二维码
map = new Bitmap(strQr);
maps[1] = map;
pointY[1] = y;

// 初始化背景图片的宽高
Bitmap bitMap = new Bitmap(maps[0].Width, maps[0].Height);

// 初始化画板
Graphics g1 = Graphics.FromImage(bitMap);

//绘制第一个图片，背景图

for (int i = 0; i < maps[0].Width; i++)
{
for (int j = 0; j < maps[0].Height; j++)
{
// 以像素点形式绘制(将要拼图的图片上的每个坐标点绘制到拼图对象的指定位置，直至所有点都绘制完成)
var temp = maps[0].GetPixel(i, j);
// 将图片画布的点绘制到整体画布的指定位置
bitMap.SetPixel(i, pointY[0] + j, temp);
}
}

maps[0].Dispose();

//绘制第二个图片，二维码
for (int i = 0; i < maps[1].Width; i++)
{
for (int j = 0; j < maps[1].Height; j++)
{
var temp = maps[1].GetPixel(i, j);
bitMap.SetPixel(x + i, pointY[1] + j, temp);
}
}

maps[1].Dispose();

　　　　 string batch = batchCode.Value.ToString();

// 保存输出到本地
if (!System.IO.Directory.Exists(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/")) //如果文件夹不存在则创建
{
System.IO.Directory.CreateDirectory(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/");
}

bitMap.Save(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/" + batch + "_" + name + ".png");

g1.Dispose();
bitMap.Dispose();

}

四、添加水印

/// <summary>
/// 水印文字
/// </summary>
/// <param name="fileName"></param>
/// <param name="text"></param>
private void AddTextToImg(string fileName, string text)
{

int x = 0;
int y = 0;

if (Custom.Value.ToString().Equals("1"))//是否开启自定义
{
x = int.Parse(ztimgx.Value) * 2;
y = int.Parse(ztimgy.Value) * 2;
}
else
{
x = int.Parse(ztimgx.Value);
y = int.Parse(ztimgy.Value);
}

if (text == string.Empty)
{
return;
}
//还需要判断文件类型是否为图像类型，这里就不赘述了

System.Drawing.Image image = System.Drawing.Image.FromFile(fileName);
Bitmap bitmap = new Bitmap(image, image.Width, image.Height);
Graphics g = Graphics.FromImage(bitmap);

float fontSize = 55.0f;    //字体大小
float textWidth = text.Length * fontSize;  //文本的长度
//下面定义一个矩形区域，以后在这个矩形里画上白底黑字
float rectX = x;
float rectY = y;
float rectWidth = text.Length * (fontSize);
float rectHeight = fontSize + 18;
//声明矩形域
RectangleF textArea = new RectangleF(rectX, rectY, rectWidth, rectHeight);

Font font = new Font("宋体", fontSize);   //定义字体
Brush whiteBrush = new SolidBrush(Color.Black);   //黑笔刷，画文字用
Brush blackBrush = new SolidBrush(Color.White);   //白笔刷，画背景用

g.FillRectangle(blackBrush, rectX, rectY, rectWidth, rectHeight);

g.DrawString(text, font, whiteBrush, textArea);

string batch = batchCode.Value.ToString();

// 保存输出到本地
if (!System.IO.Directory.Exists(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/")) //如果文件夹不存在则创建
{
System.IO.Directory.CreateDirectory(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/");
}

bitmap.Save(Server.MapPath("XXXX") + "/XXXX/XXXXX" + batch + "/" + batch + "_" + text + ".png");

g.Dispose();
bitmap.Dispose();
image.Dispose();
}

五、调取所有方法进行合成

/// <summary>
/// 生成批次台卡生成压缩包
/// </summary>
private void CreateBatchImg()
{

string batch = "XXXXX.png";

string bgPath = "";

int width = 0;

int height = 0;

for (int j = 0; j < 3000; j++)
{

setBatchImg("生成二维码的参数", batch, j);///保存图片至本地

string qrPath = Server.MapPath("XXXX") + "\\XXXX\\XXXX" + batch + "\\" + batch + "_" + j + ".png";

bgPath = Server.MapPath("XXXXX") + "\\" +XXXX + ".png";
width = int.Parse(imgwith.Value);
height = int.Parse(imgheight.Value);

//调整二维码大小
Bitmap b = new Bitmap(qrPath);
System.Drawing.Image i = resizeImage(b, new Size(width, height));
string rePath = Server.MapPath("XXXX") + "\\XXXX\\reqr.png";
i.Save(rePath);
i.Dispose();
MergeImage(bgPath, rePath, j.ToString());
AddTextToImg(Server.MapPath("Images") + "/TemQrErBatch" + batch + "/" + batch + "_" + j + ".png", j.ToString());

}

}

string relPath = "/XXXX/XXXX/XXXX/XXXXX" + batch + "/";

string relPath2 = "/XXXX/XXXX/XXXX/";

string path =  Server.MapPath(relPath);
string path2 =  Server.MapPath(relPath2);//压缩路径

if (!Directory.Exists(path))
{
// Create the directory it does not exist.
Directory.CreateDirectory(path);
}

if (System.IO.Directory.Exists(path)) //如果文件夹不存在则创建
{
string[] FileProperties = new string[2];
FileProperties[0] = path;//待压缩文件目录
FileProperties[1] = path2 + "XXXX" + batch + ".zip";  //压缩后的目标文件

ZipFloClass.ZipFiles(FileProperties[0], FileProperties[1]);

}

ZipUrl.Value = "XXXX/XXXX/XXXX" + batch + ".zip";

}