//上传图片
protected void imageUpload_tj(object sender, EventArgs e)
{
UploadFile imageObj = new UploadFile();
imageObj.MaxFileSize = 1024; //最多只能上传1M的文件大小
imageObj.FileType = "jpg|jepg|bmp";
string imagePath = Server.MapPath("~/tmpupload/");
//上传图片并保存
imageObj.UploadFileGo(imagePath, imageUploader);
if (imageObj.UploadState == false)
{
uploadInfo.Text = "";
uploadInfo.Text = "上传失败:" + imageObj.UploadInfo;
}
else
{
uploadInfo.Text = "Tips:上传图片的格式为jpg,jepg,bmp,小于1M";
imageToModify.ImageUrl = "tmpupload/" + imageObj.NewFileName;
//限制图片的高度和宽度
System.Drawing.Image img = System.Drawing.Image.FromFile(Server.MapPath("~/tmpupload/") + imageObj.NewFileName);
int height = img.Height;
int width = img.Width;
if (width >= height)
{
imageToModify.Style["width"] = "640px";
imageToModify.Style["height"] = (640.0 * height / width).ToString() + "px";
}
else
{
imageToModify.Style["width"] = (640.0 * width / height).ToString() + "px";
imageToModify.Style["height"] = "640px";
}
hiddenHW.Value = width.ToString() + "," + height.ToString();
hiddenFileName.Value = imageObj.NewFileName;
modify.Style["display"] = "block"; //最后才显示图片
}
}