Code Snippet: Retrieve an Image from HTML Source RSS

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  yaasir

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  Code Snippet: Retrieve an Image from HTML Source

  Dec 07, 2008 10:29 PM|yaasir|LINK

  // This code snippet can be used to retrieve any image from any HTML content or source
  //If youre' having any problem in coding, you can download the sample project I have written in C# (.net 2008-SP1)
  //I hope you'll like this code snippet and I know It can be written much more flexible without writing all those extensions. But to save time and energy I did it in such a way that I can achieve my goal //easily...hehe
   

   

  using System.Text;
  
  
          private void button1_Click(object sender, EventArgs e)
          {
  
  
              label2.Text  = getHTMLImage("WRITE YOUR HTML SOURCE HERE WHICH CONTAINS A <IMG> TAG");
  
  
          }
  
  
  
  
          protected virtual String getHTMLImage(string Body) {
  
  
  
  
              String bodyX = Body.ToLower();
             
  
              int getPosition = -1;
              int getPositionY = -1;
              String Extension = "";
  
  
  
  
              getPositionY = bodyX.IndexOf("src=");
  
  
              //-----------------------------------------------------
  
  
              //1st phaze
              String ImagePath = bodyX.Remove(0, getPositionY + 5);
  
  
              //2nd phaze
              if (getPosition == -1)
              {
                  getPosition = ImagePath.IndexOf(".jpg" + '"');
                  Extension = ".jpg";
              }
  
  
              if (getPosition == -1)
              {
  
  
                  getPosition = ImagePath.IndexOf(".png" + '"');
                  Extension = ".png";
              }
  
  
              if (getPosition == -1)
              {
  
  
                  getPosition = ImagePath.IndexOf(".jpeg" + '"');
                  Extension = ".jpeg";
              }
             
  
              if (getPosition == -1)
              {
  
  
                  getPosition = ImagePath.IndexOf(".gif" + '"');
                  Extension = ".gif";
              }
            
  
              if (getPosition == -1)
              {
  
  
                  getPosition = ImagePath.IndexOf(".bmp" + '"');
                  Extension = ".bmp";
              }
  
  
              try
              {
                  ImagePath = ImagePath.Remove(getPosition, ImagePath.Length - getPosition);
            
  
              }
              catch {
                  ImagePath = "no Image in the HTML Code";
                  Extension = "";
              }
  
  
              return ImagePath + Extension;
           }

    
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  ASP.NET Dev

  Contributor

  3212 Points

  703 Posts

  Re: Code Snippet: Retrieve an Image from HTML Source

  Dec 08, 2008 02:10 AM|ASP.NET Dev|LINK

  Hi,

  Good code.

  I think it will be more simple and faster if we use regular expression to find img tags.

  Check this http://www.dreamincode.net/forums/showtopic47500.htm

  www.coderhawk.com
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  TATWORTH

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  Re: Code Snippet: Retrieve an Image from HTML Source

  Dec 11, 2008 04:45 AM|TATWORTH|LINK

   The HTML Agility Pack at http://www.codeplex.com/htmlagilitypack will parse HTML

  Regular Expressions are great particularly if use Expresso a free download from http://www.ultrapico.com/ExpressoDownload.htm  however as the complexity builds up, they become more and more unweildy.

  May I respectfully suggest that you publish your snippets project on CodePlex, and include an LGPL like license that clearly establishes that the code may be copied without fee.
  

  Click "Mark as Answer" on the post that helped you.
  This earns you a point and marks your thread as Resolved so we will all know you have been helped.
  FAQ on the correct forum http://forums.asp.net/p/1337412/2699239.aspx#2699239