RadGrid Disappears after a paging request

[Jon]

Simple grid populated on the page load from a data table

loads fine

but if you then select any of the paging controls to move to another page it disappears

please see the following video

http://www.screentoaster.com/watch/stWU1cQ0ZIR19bQllaX1JcV1JR/grid_paging_bug

the page is within a master page which has this code in it

    <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
        <Scripts>
            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />
        </Scripts>
    </telerik:RadScriptManager>

Then within the page itself its like this:

                    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
                        <ajaxsettings>
                            <telerik:AjaxSetting AjaxControlID="RadGridGroups">
                                <UpdatedControls>
                                    <telerik:AjaxUpdatedControl ControlID="RadGridGroups" />
                                </UpdatedControls>
                            </telerik:AjaxSetting>
                        </ajaxsettings>
                    </telerik:RadAjaxManager>
                    <strong>Groups:</strong>
                    <telerik:RadGrid ID="RadGridGroups" runat="server" AllowPaging="true"
                        PageSize="5" GridLines="None" width="95%">
                        <clientsettings allowkeyboardnavigation="true" enablepostbackonrowclick="true">
                            <Selecting AllowRowSelect="true" />
                        </clientsettings>
                        <mastertableview datakeynames="Group_ID" />
                        <pagerstyle mode="NextPrevAndNumeric" />
                    </telerik:RadGrid>

Any ideas what its doing or I am missing or doing wrong?

Thanks

Jon.

[Jon]

After much searching fixed it, found that I needed to rebind my data on the following events:

    Protected Sub RadGridGroups_PageIndexChanged(ByVal source As Object, ByVal e As Telerik.Web.UI.GridPageChangedEventArgs) Handles RadGridGroups.PageIndexChanged
        FillDataInGrid()
    End Sub

    Protected Sub RadGridGroups_PageSizeChanged(ByVal source As Object, ByVal e As Telerik.Web.UI.GridPageSizeChangedEventArgs) Handles RadGridGroups.PageSizeChanged
        FillDataInGrid()
    End Sub

That sorted it, also Where I was setting the datasource I had a .databind() which when using nested master tables you must not use

[vedant]

Thanks,

 I had same issue , not sure why it disappear after paging but it is fixed now.

[Roukaya]

vedant ..
how u fixed it ???

thanks in advance ..

[Shinu]

Hi Roukaya,

Paging, Sorting and Filter works fine when the RadGrid is bound with Advanced Data-binding (using NeedDataSource event). Please take a look into the following sample code snippet which uses Advanced Data-binding.

ASPX:

<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" AllowPaging="true"
onneeddatasource="RadGrid1_NeedDataSource">
    <MasterTableView>
        <Columns>
            <telerik:GridBoundColumn UniqueName="OrderID" HeaderText="OrderID" DataField="OrderID"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn UniqueName="ShipName" HeaderText="ShipName" DataField="ShipName"></telerik:GridBoundColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>

C#:

public static string connection = WebConfigurationManager.ConnectionStrings["NorthwindConnectionString3"].ConnectionString;
SqlConnection conn = new SqlConnection(connection);
public SqlCommand SqlCommand = new SqlCommand();
protected void RadGrid1_NeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    string selectQuery1 = "select top 100 OrderID,ShipName from Orders";
    SqlDataAdapter adapter1 = new SqlDataAdapter(selectQuery1, conn);
    DataTable dt1 = new DataTable();
    conn.Open();
    adapter1.Fill(dt1);
    conn.Close();
    RadGrid1.DataSource = dt1;
}

Please provide your code if it doesn't help.

Thanks,
Shinu.

[Darius]

Thanks for posting the fix. Rebinding the grid to the datasource in these events resolved my issue of the grid disappearing.