Question

Hi i want to send url with hash of image source.How can do it ?

Code :

Image img_ = new Image();          
img_.ImageUrl = "ShowImageInRuntime.aspx?FileName=C://Images//Image.jpg";

i dont want to see my local path in page.Thx for your help

Answer 1

You need either perform encryption of the path and base 64 encode before sending and do the reverse in the handler.

Other option is to maintain a mapping XML where the XML would contain the path and corresponding identifier. In your application get the node with the path and pick the id and send append it to url. In the handler do the reverse to fetch the path.

UPDATE : Adding Sample code

XML file with GUID as ID and corresponding fileName. by using guid, people cannot guess the random ids easily.

<?xml version="1.0" encoding="utf-8" ?>
<mappings>
  <map id="485D9075B9CA4d8d9DBA1AD9CD09FC13" fileName="c:\images\image1.jpg"/>
  <map id="475D4A22B1FA4eda8234007BD327D7B9" fileName="c:\images\image2.jpg"/>
  <map id="77623BF3094440c49AC65CEF76D1B824" fileName="c:\images\image3.jpg"/>
</mappings>

Using LINQ to XML

public class ImageMapper
{
    private XDocument Document { get; set; }

    public ImageMapManager()
    {
        Document = XDocument.Load("Map.xml");
    }

    public string GetFileNameFromId(string id)
    {
        var result = from node in Document.Descendants("map")
                     where node.Attribute("id").Value.Equals(id, StringComparison.InvariantCultureIgnoreCase)
                     select node.Attribute("fileName").Value;
        return (result == null || result.Count() == 0) ? null : result.ElementAt(0);
    }
    public string GetIdFromFileName(string fileName)
    {
        var result = from node in Document.Descendants("map")
                     where node.Attribute("fileName").Value.Equals(fileName, StringComparison.InvariantCultureIgnoreCase)
                     select node.Attribute("id").Value;
        return (result == null || result.Count() == 0) ? null : result.ElementAt(0);

    }
}