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Setting image dynamically in gridview. Findcontrol problem

Posted on 2006-11-09
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Last Modified: 2007-12-19
Can someone tell me how to use the findcontrol command when dealing with gridview? I am attempting to set the image url dynamically. The problem I seem to be having is how to set the CONTROLID that is supposed to be used with the  MyCell.FindControl("????").  I am not reading the file from a database, I am simply attempting to set the url to display a certain graphic based on the value of an adjacent cell. I do not know what controlID I need to be looking for. Any help would be greatly appreciated

I have the following code

 <asp:ImageField HeaderText="Graphic" >
           
               
 </asp:ImageField>



 Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles GridView1.RowDataBound    
   
        If e.Row.RowType = DataControlRowType.DataRow Then

            Dim MyCell As TableCell
            MyCell = e.Row.Cells(6)
            Dim myimage As New Image
            myimage = MyCell.FindControl("????")
            myimage.ImageUrl = "~\0.gif"
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Question by:phil301
5 Comments
 
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Expert Comment

by:kraffay
ID: 17909274
Try getting a handle to the Image control by its ordinal position in the Cell's control collection:

myimage=MyCell.Controls[0, or whatever index the image control is]
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Author Comment

by:phil301
ID: 17909413
I figured it out. I was using the IMAGEFIELD when I should have been using a TEMPLATEFIELD. By using a TEMPLATEFIELD, it allows you to assign an ID to the control. The above code was correct, just needed the proper ID.

Thanks for your help.
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LVL 25

Expert Comment

by:nauman_ahmed
ID: 17909439
Try the following:

Dim MyCell As TableCell
MyCell = e.Row.Cells(6)
for each c as control in MyCell.Controls
  if c.GetType() = TypeOf("Image") Then
    Dim myimage As New Image
    myimage = DirectCast(c,Image)
    Exit For
  end if
Next


--Nauman.
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