목록 뷰 컨트롤에서 고정 크기 축소판 그림을 동적으로 생성합니다.

Question

고정 크기 축소판을 동적으로 만들고 목록보기의 이미지 크기를 조정하는 방법은 축소판의 크기에 가장 잘 맞습니다.

private void Treeview1_AfterSelect(System.Object sender, System.Windows.Forms.TreeViewEventArgs e) 
{ 
    if (folder != null && System.IO.Directory.Exists(folder)) 
       { 
        try 
        { 

         DirectoryInfo dir = new DirectoryInfo(@folder); 
         foreach (FileInfo file in dir.GetFiles()) 
         { 
          try 
          { 
           imageList.ImageSize = new Size(136, 136); 
           imageList.ColorDepth = ColorDepth.Depth32Bit; 
           Image img = new Bitmap(Image.FromFile(file.FullName));          
           Graphics g = Graphics.FromImage(img); 

           g.DrawRectangle(Pens.Red, 0, 0, img.Width - 21, img.Height - 21); 
           //g.DrawRectangle(Pens.Red, 0, 0, img.Width, img.Height);                                     
           imageList.Images.Add(img); 
          } 
          catch 
          { 
           Console.WriteLine("This is not an image file"); 
          }  
         } 


         for (int j = 0; j < imageList.Images.Count; j++) 
         { 
          this.ListView1.Items.Add("Item" + j); 
          this.ListView1.Items[j].ImageIndex = j; 
         } 

         this.ListView1.View = View.LargeIcon; 
         this.ListView1.LargeImageList = imageList; 
         //this.ListView1.DrawItem += new DrawListViewItemEventHandler(ListView1_DrawItem);              

         //import(folder); 
        } 
        catch (Exception ex) 
        { 
        } 
} 

Answer 1

내가 특별히 해상도와 함께 이미지 크기를 조정하기위한 this answer의 코드를 가지고 :

public void GenerateThumbNail(HttpPostedFile fil, string sPhysicalPath, 
           string sOrgFileName,string sThumbNailFileName, 
           ImageFormat oFormat, int rez) 
{ 

    try 
    { 

     System.Drawing.Image oImg = System.Drawing.Image.FromStream(fil.InputStream); 

     decimal pixtosubstract = 0; 
     decimal percentage; 

     //default 
     Size ThumbNailSizeToUse = new Size(); 
     if (ThumbNailSize.Width < oImg.Size.Width || ThumbNailSize.Height < oImg.Size.Height) 
     { 
      if (oImg.Size.Width > oImg.Size.Height) 
      { 
       percentage = (((decimal)oImg.Size.Width - (decimal)ThumbNailSize.Width)/(decimal)oImg.Size.Width); 
       pixtosubstract = percentage * oImg.Size.Height; 
       ThumbNailSizeToUse.Width = ThumbNailSize.Width; 
       ThumbNailSizeToUse.Height = oImg.Size.Height - (int)pixtosubstract; 
      } 
      else 
      { 
       percentage = (((decimal)oImg.Size.Height - (decimal)ThumbNailSize.Height)/(decimal)oImg.Size.Height); 
       pixtosubstract = percentage * (decimal)oImg.Size.Width; 
       ThumbNailSizeToUse.Height = ThumbNailSize.Height; 
       ThumbNailSizeToUse.Width = oImg.Size.Width - (int)pixtosubstract; 
      } 

     } 
     else 
     { 
      ThumbNailSizeToUse.Width = oImg.Size.Width; 
      ThumbNailSizeToUse.Height = oImg.Size.Height; 
     } 

     Bitmap bmp = new Bitmap(ThumbNailSizeToUse.Width, ThumbNailSizeToUse.Height); 
     bmp.SetResolution(rez, rez); 
     System.Drawing.Image oThumbNail = bmp; 

     bmp = null; 

     Graphics oGraphic = Graphics.FromImage(oThumbNail); 

     oGraphic.CompositingQuality = CompositingQuality.HighQuality; 

     oGraphic.SmoothingMode = SmoothingMode.HighQuality; 

     oGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic; 

     Rectangle oRectangle = new Rectangle(0, 0, ThumbNailSizeToUse.Width, ThumbNailSizeToUse.Height); 

     oGraphic.DrawImage(oImg, oRectangle); 

     oThumbNail.Save(sPhysicalPath + sThumbNailFileName, oFormat); 

     oImg.Dispose(); 

    } 
    catch (Exception ex) 
    { 
     Response.Write(ex.Message); 
    } 

}