Image Handler

I have images stored in a network drive in another server. How can I show the image in a web page?

If for some reason, it is not possible to create a virtual directory within IIS, then creating a handler for streaming images is the best solution. A handler is a class derived from IHttpHandler. It has a method called ProcessRequest which contains the Request and Response objects. The code for showing streaming images in a webpage using handler is as follows:

public class ImageViewer : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        string id = context.Request.QueryString["Id"];
        if (!String.IsNullOrEmpty(id))
        {
            // Retrieve the image filename based on id
            // For our example, the image filename is C:\red.jpg
            string filePath = "C:\\red.jpg";
            // The above path could be any network drive

            
            FileStream fs = new FileStream(filePath, FileMode.Open);
            byte [] bytes = new byte[fs.Length];
            fs.Read(bytes, 0, (int)fs.Length);
            context.Response.BinaryWrite(bytes);
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

In the above code, a filestream object is used to access the file in a network drive. The image is read into a binary buffer (byte []) and is written into the Response object.

In the ASPX page, you will write code like below to access the image using Handler (.ashx):

<img src="ImageViewer.ashx?id=1" />

Dim sId As String = "" 
Dim sFilePath As String = "" 
sId = context.Request.QueryString("id") 
If Not String.IsNullOrEmpty("id") Then 
   sFilePath = "\\it-dt-04\AAA\aaa.png" 
   Dim fs As New FileStream(sFilePath, FileMode.Open) 
   Dim bytes As Byte() = New Byte(fs.Length - 1) {} 
   fs.Read(bytes, 0, CInt(fs.Length)) context.Response.BinaryWrite(bytes) 
End If