protected void Button1_Click(object sender, EventArgs e)
{
string imgNameOnly, imgNameNoExt, imgExt;
string fileExt;
System.Drawing.Image oriImg, newImg;//定义图片
string strFePicSavePath = "UpLoad/Head_Photo/";
HttpPostedFile PostedFile = this.FileUpload1.PostedFile;//HttpPostedFile对象，用于读取图象文件属性
int iFileLength = PostedFile.ContentLength;//记录文件长度
if (iFileLength == 0)
{
this.Label2.Text = "请选择要上传的文件！";
}
else
{
fileExt = (System.IO.Path.GetExtension(PostedFile.FileName)).ToString().ToLower();
imgNameOnly = System.IO.Path.GetFileName(PostedFile.FileName);
if (fileExt == ".jpg" || fileExt == ".gif" || fileExt == ".png")
{
if (System.IO.File.Exists(strFePicSavePath + imgNameOnly))
{
Response.Write(" <script>alert('此文件名已存在！请将照片重命名后再上传！');history.back(); </script>");
return;
}
else
{
imgNameOnly = System.IO.Path.GetFileName(PostedFile.FileName);
imgNameNoExt = System.IO.Path.GetFileNameWithoutExtension(PostedFile.FileName);
imgExt = System.IO.Path.GetExtension(PostedFile.FileName).ToString().ToLower();
oriImg = System.Drawing.Image.FromStream(PostedFile.InputStream);
newImg = oriImg.GetThumbnailImage(122, 122 * oriImg.Height / oriImg.Width, null, new System.IntPtr(0));
switch (imgExt)
{
case ".jpg":
newImg.Save(strFePicSavePath + imgNameNoExt + "_thumb.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);//“GDI+ 中发生一般性错误。”
/*改为newImg.Save(Server.MapPath(strFePicSavePath + imgNameNoExt + "_thumb.jpg", System.Drawing.Imaging.ImageFormat.Jpeg));*/
break;
case ".gif":
oriImg.Save(strFePicSavePath + imgNameNoExt + "_thumb.jpg", System.Drawing.Imaging.ImageFormat.Gif);
break;
case ".png":
oriImg.Save(strFePicSavePath + imgNameNoExt + "_thumb.jpg", System.Drawing.Imaging.ImageFormat.Png);
break;
}
oriImg.Dispose();
newImg.Dispose();
}
}
else
{
Response.Write(" <script>alert('只能上传.jpg,.bmp,.gif,.png格式的图片！');history.back(); </script>");
return;
}
}
}