图片尺寸

  protected void btnUpload_Click(object sender, EventArgs e)

        {

            int width = 0, height = 0;

            if (fileUpload.HasFile)

            {

                string dict = "/Content/Files/" + DateTime.Now.ToShortDateString() + "/";

                string serverPath = Server.MapPath(dict);

                if (!System.IO.File.Exists(serverPath))

                {

                    System.IO.Directory.CreateDirectory(serverPath);

                    string filePath = serverPath + fileUpload.FileName;

                    fileUpload.SaveAs(filePath);

                    getImageSize(filePath, out width, out height);

                    if (width >= 400 || height >= 400)

                    {

                        literFile.Text = "上传文件尺寸必须是：400*400";

                        System.IO.File.Delete(filePath);

                    }

                    else

                    {

                        literFile.Text = width + ":" + height;

                    }

                }

            }

            else

            {

                Response.Write("没有上传文件");

            }

        }



        private void getImageSize(string filePath, out int iWidth, out int iHeight)

        {

            iWidth = iHeight = 0;
          //FileStream

            System.Drawing.Image imgFile = System.Drawing.Image.FromFile(filePath);

            if (imgFile != null)

            {

                iWidth = imgFile.Width;

                iHeight = imgFile.Height;

            }

            imgFile.Dispose();

        }