I want to expand all Master Table View Items from code behind (server side). To do this, I use Page_PreRenderComplete() event and expanding each MasterTableView Items.
It works fine, however for some reason the Paging Footer section is always visible. I want the Paging Footer to only appear if the number of records are bigger than the Page Size.
If you manually expand an item from UI, the Grid behaves correctly.
Telerik version used: Version=2008.2.826.35
Environment: Visual Studi0 2008 with .NET Framework 3.5
<%
@ Page Language="C#" AutoEventWireup="true" CodeBehind="RadGridTest.aspx.cs" Inherits="SlidingPaneTest.RadGridTest" %>
<%
@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<
html xmlns="http://www.w3.org/1999/xhtml">
<
head runat="server">
<title></title>
</
head>
<
body>
<form id="form1" runat="server">
<div>
<asp:CheckBox ID="chkShowAll" runat="server" AutoPostBack="true" Text="Expand All"
OnCheckedChanged="chkShowAll_CheckedChanged" />
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>
<telerik:RadGrid ID="RadGrid1" runat="server" ShowStatusBar="True" AllowPaging="true"
ShowGroupFooter="false" AutoGenerateColumns="False" OnNeedDataSource="RadGrid1_NeedDataSource"
Skin="Office2007" OnDetailTableDataBind="RadGrid1_DetailTableDataBind" PageSize="20">
<PagerStyle Mode="NextPrevAndNumeric"></PagerStyle>
<MasterTableView Width="100%" AutoGenerateColumns="False" DataKeyNames="MasterID"
Name="MasterTable">
<DetailTables>
<telerik:GridTableView Width="1000" runat="server" AutoGenerateColumns="False" Name="DetailView"
ShowStatusBar="False" PageSize="10" EditMode="EditForms">
<PagerStyle Mode="NumericPages" AlwaysVisible="false" />
<Columns>
<telerik:GridBoundColumn SortExpression="Hobby" DataField="Hobby" UniqueName="Hobby"
HeaderText="Hobby" HeaderButtonType="TextButton" />
</Columns>
</telerik:GridTableView>
</DetailTables>
<Columns>
<telerik:GridBoundColumn SortExpression="Name" DataField="Name" HeaderText="Name"
UniqueName="Name" HeaderButtonType="TextButton">
</telerik:GridBoundColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>
</div>
</form>
</
body>
</
html>
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Data;
using
Telerik.Web.UI;
namespace
SlidingPaneTest
{
public partial class RadGridTest : System.Web.UI.Page
{
protected void Page_PreRenderComplete(object sender, EventArgs e)
{
if (chkShowAll.Checked)
{
foreach (GridItem item in RadGrid1.MasterTableView.GetItems(GridItemType.Item))
{
item.Expanded = true;
}
foreach (GridItem item in RadGrid1.MasterTableView.GetItems(GridItemType.AlternatingItem))
{
item.Expanded = true;
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
RadGrid1.DataBind();
}
}
private DataTable CreateMasterTable()
{
DataTable dt = new DataTable();
dt.Columns.Add("MasterID");
dt.Columns.Add("Name");
DataRow dr;
dr = dt.NewRow();
dr[0] = "1";
dr[1] = "John Smith";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = "2";
dr[1] = "William Bush";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = "3";
dr[1] = "Andrew Connection";
dt.Rows.Add(dr);
return dt;
}
private DataTable GetHobby()
{
DataTable dt = new DataTable();
dt.Columns.Add("Hobby");
DataRow dr;
dr = dt.NewRow();
dr[0] = "Swimming";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = "Reading";
dt.Rows.Add(dr);
return dt;
}
private void SetDataSource()
{
if (Session["MasterData"] == null)
{
Session["MasterData"] = CreateMasterTable();
}
RadGrid1.DataSource = Session["MasterData"];
}
protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
if (!e.IsFromDetailTable)
{
SetDataSource();
}
}
protected void RadGrid1_DetailTableDataBind(object source, GridDetailTableDataBindEventArgs e)
{
GridDataItem dataItem = (GridDataItem)e.DetailTableView.ParentItem;
switch (e.DetailTableView.Name)
{
case "DetailView":
{
string id = dataItem.GetDataKeyValue("MasterID").ToString();
e.DetailTableView.DataSource = GetHobby();
break;
}
}
}
protected void chkShowAll_CheckedChanged(object sender, EventArgs e)
{
RadGrid1.Rebind();
}
}
}
1 Answer, 1 is accepted
Using RadGrid's PreRender event for this functionality, instead of Page_PreRender, should successfully fix the problem, as RadGrid cannot properly modify its item state in Page_PreRender. Please check it out.
Kind regards,
Veli
the Telerik team
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