database Image not getting displayed asp.net - asp.net

Question

trying to display an image from database in an image control... third day...no luck so far...
Displaybutton on Employee.aspx
Protected Sub DisplayButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles DisplayButton.Click
bind()
GridView1.Visible = "True"
If EmployeeIDTextBox.Text = "" Then
MsgBox("Please enter EmployeeID!")
Else
Image1.ImageUrl = "~/HttpHandler.ashx?EmployeeID=" & EmployeeIDTextBox.Text
End If
End Sub
This is the handler:
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
'context.Response.ContentType = "text/plain"
'context.Response.Write("Hello World!")
Dim EmployeeID As Integer
If (Not (context.Request.QueryString("EmployeeID")) Is Nothing) Then
EmployeeID = Convert.ToInt32(context.Request.QueryString("EmployeeID"))
Else
Throw New ArgumentException("No parameter specified")
End If
Dim imageData() As Byte = {}
' get the image data from the database using the employeeId Querystring
context.Response.ContentType = "image/jpeg"
' You can retrieve this also from the database
context.Response.BinaryWrite(imageData)
End Sub
this is the image control (on Employee.aspx) in which i wanna display the image
<asp:Image ID="Image1" runat="server" imageUrl="HttpHandler.ashx?EmployeeID=7" />
got a lotta help... seems wasnt enough...

Answer 1

These can be helpful. Scenario is similar and can be achieved for your situation:
Display image from a datatable in asp:image in code-behind
Showing an image in listview from datatable

Answer 2

This is in c# but will help someone.
public void ProcessRequest(HttpContext context)
{
string querystring = context.Request.QueryString.ToString();
try
{
if (querystring != null && querystring.Trim().Length == 0)
{
context.Response.ContentType = "text/plain";
context.Response.Write("Error");
context.Response.Write("No");
return;
}
string DocCode = querystring;
DataTable dt = GetDocumentInfo(DocCode); //Get Image From Database. I encapsulated it in other method.Implement it,
if (dt.Rows.Count == 0)
{
context.Response.ContentType = "text/plain";
context.Response.Write("Error");
context.Response.Write("No");
return;
}
context.Response.Clear();
context.Response.ClearContent();
context.Response.ClearHeaders();
context.Response.Cache.SetCacheability(HttpCacheability.Public);
context.Response.Cache.SetExpires(DateTime.MinValue);
context.Response.ContentType = MimeMapping.GetMimeMapping(System.IO.Path.GetFileName(dt.Rows[0]["DocumentFileName"].ToString()));
context.Response.AddHeader("content-disposition", "inline; filename=" + System.IO.Path.GetFileName(dt.Rows[0]["DocumentFileName"].ToString()));
context.Response.Buffer = true;
context.Response.Charset = "";
context.Response.BinaryWrite((Byte[])dt.Rows[0]["DocumentFile"]);
context.Response.Flush();
}
catch (Exception ex)
{
context.Response.ContentType = "text/plain";
context.Response.Write("Error");
context.Response.Write("No");
return;
}
context.Response.End();
}