从阵列的UpdatePanel图像

Question

其实我想圆角的图像，然后在updatePanel中显示它... 没有圆角函数它工作得很好......但是当我运行圆角图像的函数时，它给出文件未找到错误（）

我的代码

protected void Timer1_Tick(object sender, EventArgs e) 
     { 
      NameValueCollection MyImgList = new NameValueCollection(); 
      MyImgList.Add("Img1", "~/MyImages/Picture1.jpg"); 
      MyImgList.Add("Img2", "~/MyImages/Picture2.jpg"); 
      MyImgList.Add("img3", "~/MyImages/Picture3.jpg"); 
      Random Rnd = new Random(); 
      int Indx = Rnd.Next(0, 4); 
      path = MyImgList[Indx].ToString(); 
      //LtrImg.Text = "<img src='" + Page.ResolveUrl(path) + "' alt=''/>"; 
      using (System.Drawing.Image imgin = System.Drawing.Image.FromFile(path)) 
      { 
       System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(imgin.Width, imgin.Height); 
       Graphics g = Graphics.FromImage(bitmap); 
       g.Clear(Color.White); 
       Brush brush = new System.Drawing.TextureBrush(imgin); 
       FillRoundedRectangle(g, new Rectangle(0, 0, imgin.Width, imgin.Height), roundedDia, brush); 
       // done with drawing dispose graphics object. 
       g.Dispose(); 
       // Stream Image to client. 
       Response.Clear(); 
       Response.ContentType = "image/pjpeg"; 
       bitmap.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); 
       Response.End(); 
       // dispose bitmap object. 
       bitmap.Dispose(); /* May be Here */ 
      } 
      LtrImg.Text = "<img src='" + Page.ResolveUrl(path) + "' alt=''/>"; 
     } 

感谢导向管..

Answer 1

无论如何，我成功通过以下方式..

protected void Timer1_Tick(object sender, EventArgs e) 
     { NameValueCollection MyImgList = new NameValueCollection(); 
      MyImgList.Add("MyImage1", "~/MyImages/Picture1.jpg"); 
      MyImgList.Add("MyImage2", "~/MyImages/Picture2.jpg"); 
      MyImgList.Add("MyImage3", "~/MyImages/Picture3.jpg"); 
      Random Rnd = new Random(); 
      int Indx = Rnd.Next(0, 4); 
      Session["ImgId"] = Indx.ToString(); 
      Image1.ImageUrl = "ImgWebForm.aspx?ImgId="+Indx.ToString().Trim(); 
     } 

然后

ImgWebForm.aspx Page_Load() 
{ 
string ImgFileId = Session["ImgId"].ToString(); 
      switch (ImgFileId) 
      { 
       case "1": 
        path = Server.MapPath("~/MyImages/Picture1.jpg"); 
        break; 
       case "2": 
        path = Server.MapPath("~/MyImages/Picture2.jpg"); 
        break; 
       case "3": 
        path = Server.MapPath("~/MyImages/Picture3.jpg"); 
        break; 
      } 
      int roundedDia = 50; 
      using (System.Drawing.Image imgin = System.Drawing.Image.FromFile(path)) 
      { 
       System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(imgin.Width, imgin.Height); 
       Graphics g = Graphics.FromImage(bitmap); 
       g.Clear(Color.White); 
       Brush brush = new System.Drawing.TextureBrush(imgin); 
       FillRoundedRectangle(g, new Rectangle(0, 0, imgin.Width, imgin.Height), roundedDia, brush); 
       // done with drawing dispose graphics object. 
       g.Dispose(); 
       // Stream Image to client. 
       Response.Clear(); 
       Response.ContentType = "image/pjpeg"; 
       bitmap.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); 
       Response.End(); 
       // dispose bitmap object. 
       bitmap.Dispose(); 
      } 
public static void FillRoundedRectangle(Graphics g, Rectangle r, int d, Brush b) 
     { 
      // anti alias distorts fill so remove it. 
      System.Drawing.Drawing2D.SmoothingMode mode = g.SmoothingMode; 
      g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed; 
      g.FillPie(b, r.X, r.Y, d, d, 180, 90); 
      g.FillPie(b, r.X + r.Width - d, r.Y, d, d, 270, 90); 
      g.FillPie(b, r.X, r.Y + r.Height - d, d, d, 90, 90); 
      g.FillPie(b, r.X + r.Width - d, r.Y + r.Height - d, d, d, 0, 90); 
      g.FillRectangle(b, r.X + d/2, r.Y, r.Width - d, d/2); 
      g.FillRectangle(b, r.X, r.Y + d/2, r.Width, r.Height - d); 
      g.FillRectangle(b, r.X + d/2, r.Y + r.Height - d/2, r.Width - d, d/2); 
      g.SmoothingMode = mode; 
     } 

让到someoneelse像我.. 三江源它是有用的......