asp.Netは画像をアップロードし、サムネイルのコードを同時に生成します

 
  
 
  
 
  
 
  
 
  
 
  
 
  <br>　 
  <br>void Page_Load(Object sender, EventArgs e) 
  <br>{ 
  <br>if (!Page.IsPostBack) 
  <br>{ 
  <br>ImgPreview.Visible = false; 
  <br>} 
  <br>} 
  <br>void GetThumbnailImage(int width, int height, string strInfo, int left, int right) 
  <br>{ 
  <br>string file = "Uploads/" + uploadFile.PostedFile.FileName.Substring(uploadFile.PostedFile.FileName.LastIndexOf('\\') + 1); 
  <br>string newfile = "Uploads/" + uploadFile.PostedFile.FileName.Substring(uploadFile.PostedFile.FileName.LastIndexOf('\\') + 1) + ".jpg"; 
  <br>string strAdd = strInfo; 
  <br>System.Drawing.Image oldimage = System.Drawing.Image.FromFile(Server.MapPath(file)); 
  <br>System.Drawing.Image thumbnailImage = 
  <br>oldimage.GetThumbnailImage(width, height, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero); 
  <br>Response.Clear(); 
  <br>Bitmap output = new Bitmap(thumbnailImage); 
  <br>Graphics g = Graphics.FromImage(output); 
  <br>g.DrawString(strAdd, new Font("Courier New", 14), new SolidBrush(Color.Red), left, right); 
  <br>output.Save(Server.MapPath(newfile), System.Drawing.Imaging.ImageFormat.Jpeg); 
  <br>Response.ContentType = "image/gif"; 
  <br>ImgPreview.Visible = true; 
  <br>ImgPreview.ImageUrl = newfile; 
  <br>} 
  <br>bool ThumbnailCallback() 
  <br>{ 
  <br>return true; 
  <br>} 
  <br>void Button_Click(object sender, EventArgs e) 
  <br>{ 
  <br>int width, height, left, right; 
  <br>string strAddInfo = txtAddInfo.Text; 
  <br>width = Int32.Parse(txtWidth.Text); 
  <br>height = Int32.Parse(txtHeight.Text); 
  <br>left = Int32.Parse(txtLeft.Text); 
  <br>right = Int32.Parse(txtRight.Text); 
  <br>if (!(uploadFile.PostedFile.ContentLength > 0)) 
  <br>{ 
  <br>lblErrInfo.Text = "      "; 
  <br>} 
  <br>else 
  <br>{ 
  <br>string path = Server.MapPath("./Uploads/" + uploadFile.PostedFile.FileName.Substring(uploadFile.PostedFile.FileName.LastIndexOf('\\') + 1)); 
  <br>if (File.Exists(path)) 
  <br>{ 
  <br>lblErrInfo.Text = "       "; 
  <br>} 
  <br>else 
  <br>{ 
  <br>uploadFile.PostedFile.SaveAs(path); 
  <br>GetThumbnailImage(width, height, strAddInfo, left, right); 
  <br>} 
  <br>} 
  <br>} 
  <br> 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
width:100 
  
height:150 
  
 
  
 
  
    ： AspxBoy.Com 
  
 
  
 
  
    ：left:10 
  
right:135