FreeTextBox控件上传图片到指定的绝对路径的改进

大家都用FreeTextBox控件，本人也非常喜欢用它，特别是发布图文信息的时候非常有用，上传图片的小插件是ftb.imagegallery.aspx

里面有源代码，我们可以更改，比如添加只有登录才能访问啊，对上传图片的类型进行检测啦（该控件已有的图片类型检查室已检查文件名后缀来进行的，会存在安全隐患，所以必须自己写），呵呵，好像跑题了，今天的重点是要让图片上传到指定的绝对路径。因为本控件，原始的代码只允许上传图片的路径是在主目录以内，但要是有必须上传到网站主目录以外的情况，就没办法了

本人就碰到了这个情况，本人做的一个网站是前后台分开的（为了安全），也就是说前台后台在IIS中是相互独立运行的网站，而且网站文件也存在不同的盘符上面，比如前台在D盘，而后台在E盘上

那我们在后台上传的图片文件怎么样上传到前台所在的D盘的目录中呢，因为只有这样前台才能正常访问。

我在网上找了很久，大家都认为这个控件对这个问题是无法解决的，一直没有找到解决办法，可是我还是不甘心，因为这个问题不解决，这个网站就没法做下去了，所以就硬着头皮去看源代码

仔细一看，看出点门道来了，我主要看ftb.imagegallery.aspx里上传图片，显示图片和目录的路径获取

结果发现了在这几个函数中都存在一个关键性的句子：string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;

这个句子的意思很明显就是获得当前应用程序的物理路径，我立马想到，我如果能够将这个路径改成我需要上传到的绝对路径不就可以了吗？

非常兴奋，就修改代码尝试了

下面我们来看看我修改了哪几个函数

第一个：图片上传函数

public void UploadImage_OnClick(object sender, EventArgs e) {
Jake.Common.Common isfile = new Jake.Common.Common();
if (Page.IsValid) {
if (CurrentImagesFolder.Value != "") {
if (UploadFile.PostedFile.FileName.Trim() != "") {
if (IsValidFileType(UploadFile.PostedFile.FileName)) {
if (isfile.IsAllowedFile(UploadFile.PostedFile, "255216") || isfile.IsAllowedFile(UploadFile.PostedFile, "7173"))//从文件流判断文件类型
{
try
{
string UploadFileName = "";
string UploadFileDestination = "";
UploadFileName = UploadFile.PostedFile.FileName;
UploadFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + UploadFileName.Substring(UploadFileName.LastIndexOf("\\") + 1);
//UploadFileDestination = HttpContext.Current.Request.PhysicalApplicationPath;
UploadFileDestination = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成我指定的绝对路径，此路径我放在了Web.Config中灵活配置。
UploadFileDestination += CurrentImagesFolder.Value;
UploadFileDestination += "\\";
UploadFile.PostedFile.SaveAs(UploadFileDestination + UploadFileName);
ResultsMessage.Text = UploadSuccessMessage;
}
catch
//(Exception ex)
{
//ResultsMessage.Text = "Your file could not be uploaded: " + ex.Message;
ResultsMessage.Text = UploadFailureMessage;
}
}
else { ResultsMessage.Text = InvalidFileTypeMessage; }
} else {
ResultsMessage.Text = InvalidFileTypeMessage;
}
} else {
ResultsMessage.Text = NoFileMessage;
}
} else {
ResultsMessage.Text = NoFolderSpecifiedMessage;
}
} else {
ResultsMessage.Text = InvalidFileTypeMessage;

}
DisplayImages();
}
public void UploadImage_OnClick(object sender, EventArgs e) {
Jake.Common.Common isfile = new Jake.Common.Common();
if (Page.IsValid) {
if (CurrentImagesFolder.Value != "") {
if (UploadFile.PostedFile.FileName.Trim() != "") {
if (IsValidFileType(UploadFile.PostedFile.FileName)) {
if (isfile.IsAllowedFile(UploadFile.PostedFile, "255216") || isfile.IsAllowedFile(UploadFile.PostedFile, "7173"))//从文件流判断文件类型
{
try
{
string UploadFileName = "";
string UploadFileDestination = "";
UploadFileName = UploadFile.PostedFile.FileName;
UploadFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + UploadFileName.Substring(UploadFileName.LastIndexOf("\\") + 1);
//UploadFileDestination = HttpContext.Current.Request.PhysicalApplicationPath;
UploadFileDestination = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成我指定的绝对路径，此路径我放在了Web.Config中灵活配置。
UploadFileDestination += CurrentImagesFolder.Value;
UploadFileDestination += "\\";
UploadFile.PostedFile.SaveAs(UploadFileDestination + UploadFileName);
ResultsMessage.Text = UploadSuccessMessage;
}
catch
//(Exception ex)
{
//ResultsMessage.Text = "Your file could not be uploaded: " + ex.Message;
ResultsMessage.Text = UploadFailureMessage;
}
}
else { ResultsMessage.Text = InvalidFileTypeMessage; }
} else {
ResultsMessage.Text = InvalidFileTypeMessage;
}
} else {
ResultsMessage.Text = NoFileMessage;
}
} else {
ResultsMessage.Text = NoFolderSpecifiedMessage;
}
} else {
ResultsMessage.Text = InvalidFileTypeMessage;

}
DisplayImages();
}

第二个函数（图片删除函数）
：

public void DeleteImage_OnClick(object sender, EventArgs e) {
if (FileToDelete.Value != "" && FileToDelete.Value != "undefined") {
try {
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定绝对路径
System.IO.File.Delete(AppPath + CurrentImagesFolder.Value + "\\" + FileToDelete.Value);
ResultsMessage.Text = "已删除: " + FileToDelete.Value;
} catch//(Exception ex)
{
ResultsMessage.Text = "删除失败！";
}
} else {
ResultsMessage.Text = NoFileToDeleteMessage;
}
DisplayImages();
}
public void DeleteImage_OnClick(object sender, EventArgs e) {
if (FileToDelete.Value != "" && FileToDelete.Value != "undefined") {
try {
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定绝对路径
System.IO.File.Delete(AppPath + CurrentImagesFolder.Value + "\\" + FileToDelete.Value);
ResultsMessage.Text = "已删除: " + FileToDelete.Value;
} catch//(Exception ex)
{
ResultsMessage.Text = "删除失败！";
}
} else {
ResultsMessage.Text = NoFileToDeleteMessage;
}
DisplayImages();
}

第三个函数：（（返回文件列表）

private string[] ReturnFilesArray() {
if (CurrentImagesFolder.Value != "") {
try {
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定的绝对路径
string ImageFolderPath = AppPath + CurrentImagesFolder.Value;
string[] FilesArray = System.IO.Directory.GetFiles(ImageFolderPath,"*");
return FilesArray;

} catch {

return null;
}
} else {
return null;
}

}
private string[] ReturnFilesArray() {
if (CurrentImagesFolder.Value != "") {
try {
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定的绝对路径
string ImageFolderPath = AppPath + CurrentImagesFolder.Value;
string[] FilesArray = System.IO.Directory.GetFiles(ImageFolderPath,"*");
return FilesArray;

} catch {

return null;
}
} else {
return null;
}

}

第四个函数：（返回文件夹列表）

private string[] ReturnDirectoriesArray() {
if (CurrentImagesFolder.Value != "") {
try {
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处
string CurrentFolderPath = AppPath + CurrentImagesFolder.Value;
string[] DirectoriesArray = System.IO.Directory.GetDirectories(CurrentFolderPath,"*");
return DirectoriesArray ;
} catch {
return null;
}
} else {
return null;
}
}
private string[] ReturnDirectoriesArray() {
if (CurrentImagesFolder.Value != "") {
try {
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处
string CurrentFolderPath = AppPath + CurrentImagesFolder.Value;
string[] DirectoriesArray = System.IO.Directory.GetDirectories(CurrentFolderPath,"*");
return DirectoriesArray ;
} catch {
return null;
}
} else {
return null;
}
}

第五个函数：（显示图片函数）

public void DisplayImages() {
string[] FilesArray = ReturnFilesArray();
string[] DirectoriesArray = ReturnDirectoriesArray();
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处
string AppUrl;

//Get the application's URL
if (Request.ApplicationPath == "/")
AppUrl = Request.ApplicationPath;
else
AppUrl = Request.ApplicationPath + "/";

GalleryPanel.Controls.Clear();
if ( (FilesArray == null || FilesArray.Length == 0) && (DirectoriesArray == null || DirectoriesArray.Length == 0) ) {
gallerymessage.Text = NoImagesMessage + ": " + RootImagesFolder.Value;
} else {
string ImageFileName = "";
string ImageFileLocation = "";

//。。。。。。。下面代码略
public void DisplayImages() {
string[] FilesArray = ReturnFilesArray();
string[] DirectoriesArray = ReturnDirectoriesArray();
//string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处
string AppUrl;

//Get the application's URL
if (Request.ApplicationPath == "/")
AppUrl = Request.ApplicationPath;
else
AppUrl = Request.ApplicationPath + "/";

GalleryPanel.Controls.Clear();
if ( (FilesArray == null || FilesArray.Length == 0) && (DirectoriesArray == null || DirectoriesArray.Length == 0) ) {
gallerymessage.Text = NoImagesMessage + ": " + RootImagesFolder.Value;
} else {
string ImageFileName = "";
string ImageFileLocation = "";

//。。。。。。。下面代码略

好，到此为止呢，我们已经可以将图片上传到我们指定的绝对路径了，这个绝对路径就是我前台网站里的图片存储目录

可是这样还有个小问题，就是我们插入图片时时双击图片，然后图片就到了文本编辑器里了，看HTML代码就可以看到，返回的路径是，当前网站的绝对访问路径，也就是：http://192.168.1.5:8081/upimages/111.gif类似的路径

但是如果我们不修改此返回路径，那插入到编辑器里的图片将是无法显示的，因为当前网站下面根本不存在“upimages/111.gif”这个文件夹和文件，所以我们的修改成前台网站的访问地址，比如我的前台访问地址就是http://192.168.1.5:8082/upimages/111.gif

那我们怎么修改返回地址呢，我们仔细看代码，我们发现有

myImageHolder.Attributes["ondblclick"]="returnImage('ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');";
myImageHolder.Controls.Add(myHtmlImage);
myImageHolder.Attributes["ondblclick"]="returnImage('ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');";
myImageHolder.Controls.Add(myHtmlImage);

这个里面的事件是鼠标双击事件，很明显returnImage里就是要返回的图片访问路径啊，所以我们更改成

string address = LTP.Common.ConfigHelper.GetConfigString("Address");//在web.config文件里配置前台访问IP或地址
myImageHolder.Attributes["ondblclick"]="returnImage('"+address + ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');";
myImageHolder.Controls.Add(myHtmlImage);
string address = LTP.Common.ConfigHelper.GetConfigString("Address");//在web.config文件里配置前台访问IP或地址
myImageHolder.Attributes["ondblclick"]="returnImage('"+address + ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');";
myImageHolder.Controls.Add(myHtmlImage);

这样双击返回的就是我们想要的http://192.168.1.5:8082/upimages/111.gif啦，在后台编辑时显示正常，同样前台访问肯定也很正常了，呵呵，至此修改结束

问题解决，因为在网上没找到相关资料

所以在这里记录下来

希望对有需求的朋友起到抛砖引玉的左右

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/j_jake/archive/2009/09/01/4508776.aspx