<div>
<div class="content wysiwyg-content">
On Datakeyname in Gridview properties, I have &quot;cid, firstname&quot;), but why this won't work? 
 
 
 
&nbsp; &nbsp; Protected Sub GridView1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.SelectedIndexChanged 
 
 
&nbsp; &nbsp; &nbsp; &nbsp; Dim idNum As String = Me.GridView1.SelectedDataKey.Value(&quot;cid&quot;).ToString 
&nbsp; &nbsp; &nbsp; &nbsp; Dim idNum2 As String = Me.GridView1.SelectedDataKey.Value(&quot;firstname&quot;).ToString 
 
&nbsp; &nbsp; &nbsp; &nbsp; Dim URL As String = [String].Concat(&quot;test.aspx?cid=&quot;, idNum &amp;&nbsp;idNum2) 
 
&nbsp; &nbsp; &nbsp; &nbsp; Response.Redirect(URL) 
 
 
&nbsp; &nbsp; End Sub
</div>
</div>

On Datakeyname in Gridview properties, I have "cid, firstname"), but why this won't work? 



    Protected Sub GridView1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.SelectedIndexChanged


        Dim idNum As String = Me.GridView1.SelectedDataKey.Value("cid").ToString
        Dim idNum2 As String = Me.GridView1.SelectedDataKey.Value("firstname").ToString

        Dim URL As String = [String].Concat("test.aspx?cid=", idNum & idNum2)

        Response.Redirect(URL)


    End Sub

gridview

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications