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RadGrid set value cell

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Alex
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Alex asked on 08 Nov 2016, 12:12 PM

Hi,

I have a GridTemplateColumn with itemtemplate, in this itemtemplate i have a linkbutton and ImageControl, when i click the link i want show the image. 

this is the aspx:

<telerik:GridTemplateColumn UniqueName="BtnPOD" HeaderStyle-Width="5%" ItemStyle-Width="10%" HeaderText="POD" AllowFiltering="false" >

                                            <ItemTemplate>
                                                <asp:LinkButton ID="btnPOD" CommandName ="detailPOD" Text='<%#Eval("POD")%>' runat="server"/>
                                                <asp:Image ID="ImgPOD" runat="server" ImageUrl='<%#Eval("POD")%>' />                                                                                                               </ItemTemplate>                                                                                  
</telerik:GridTemplateColumn>

 

in vb, in the ItemCommand event:

If Not Image Is Nothing AndAlso Image.Length <> 0 Then
            Dim arrpictures As Byte() = System.Convert.FromBase64String(Image)
            Dim myStream As New System.IO.MemoryStream(arrpictures)
            Dim base64String As String = Convert.ToBase64String(arrpictures, 0, arrpictures.Length)
            For i = 0 To CType(Session("GridViewData"), DataTable).Rows.Count - 1
                If i = e.Item.ItemIndexThen
                    CType(Session("GridViewData"), DataTable).Rows(i)("POD") = "data:image/jpeg;base64," & base64String
                End If
            Next
End If

i modify the DataTable and in needdatasource event:

RadGrid1.DataSource = CType(Session("GridViewData"), DataTable)

in needdatasource i check the changes in DataTable, but i can see the changes in radgrid

 

 

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Vasil
Telerik team
answered on 11 Nov 2016, 01:13 PM
Hi Alex,

At which event of the Page Lifecycle you call Rebind(), for the grid to get the new data? If you call it too late, it is already rendered using the old data.

Regards,
Vasil
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