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184
AJAX paging with grid created in code
posted

I am trying to create a webgrid control that can use AJAX to do paging back and forth.  I created the webgrid on an ASPX page and bound it to a dataset and then enabled AJAX and it pages OK using AJAX to populate the pages. 

I then tried to do the same thing generating the webgrid control in code behind, setting the properties of the webgrid to be the same as the properties that I found in the source of the ASPX page.  When I do this, the grid shows up OK when you load the page, but it doesn't page when I click the Next/Prev buttons - nothing happens at all. 

I tried putting a breakpoint in the IntializeDataSource event handler.  On the ASPX page where I add the webgrid via the designer, the event fires off every time I click the NEXT or PREV buttons on the pager.  But on the other ASPX page, where I added the grid through code-behind, the event handler is not firing.

 Anyone got any ideas?

Here's all the code:

InfragisticsGrid.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="InfragisticsGrid.aspx.cs" Inherits="MyTestWebApplication.InfragisticsGrid" %>
<%@ Register Assembly="Infragistics2.WebUI.UltraWebGrid.v8.1, Version=8.1.20081.1000, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
Namespace="Infragistics.WebUI.UltraWebGrid" TagPrefix="igtbl" %>
<!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>Untitled Page</title></head>
<body>
<form id="form1" runat="server">
<!-- before grid -->
<div id="GridPlaceholder" runat="server">
 
</div>
<!-- after grid -->
</form></body>
</html>

InfragisticsGrid.aspx.cs 
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MyTestData.DataSetTableAdapters;
using MyTestData.Properties;
using Infragistics.WebUI.UltraWebGrid;
 
namespace MyTestWebApplication
{
public partial class InfragisticsGrid : System.Web.UI.Page
{
private UltraWebGrid _ultraWebGrid1;public UltraWebGrid UltraWebGrid1
{
get {
if (_ultraWebGrid1 == null)
{
_ultraWebGrid1 = new UltraWebGrid();
}
return _ultraWebGrid1; 
}
}
 
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
FormatGrid();
InitDataSource();
this.FindControl("GridPlaceholder").Controls.Add(UltraWebGrid1);
}
}
private void InitDataSource()
{
CommitteeTableAdapter ta = new CommitteeTableAdapter();
MyTestData.DataSet.CommitteeDataTable tbCommittee = ta.GetData();
DataView dvCommittee = new DataView(tbCommittee);dvCommittee.Sort = "ShortName";
UltraWebGrid1.DataSource = dvCommittee;
UltraWebGrid1.DataBind();
}
 
protected void UltraWebGrid1_InitializeDataSource(object sender, UltraGridEventArgs e)
{
InitDataSource();
}
 
private void FormatGrid()
{
// General properties - set up AJAX paging
UltraWebGrid1.ID = "UltraWebGrid";
UltraWebGrid1.Browser = BrowserLevel.Xml; 
UltraWebGrid1.EnableTheming = false;
UltraWebGrid1.Width = Unit.Percentage(100.0);
UltraWebGrid1.InitializeDataSource += new InitializeDataSourceEventHandler(UltraWebGrid1_InitializeDataSource);
// Display-related properties
UltraGridLayout layout = UltraWebGrid1.DisplayLayout;
layout.Name = "GridLayout";
layout.AllowSortingDefault = AllowSorting.OnClient;
layout.AllowColSizingDefault = AllowSizing.Free;
layout.TableLayout = TableLayout.Fixed;
layout.RowSelectorsDefault = RowSelectors.No;
layout.AllowColumnMovingDefault = AllowColumnMoving.None;
layout.HeaderClickActionDefault = HeaderClickAction.SortSingle;
layout.StationaryMargins = StationaryMargins.Header;
layout.BorderCollapseDefault = BorderCollapse.Separate;
layout.AutoGenerateColumns = false;
layout.LoadOnDemand = LoadOnDemand.Xml;
layout.Section508Compliant = true;layout.FrameStyle.Width = Unit.Percentage(100.0);
 
// Add one column
UltraWebGrid1.Bands.Add(new UltraGridBand());
UltraGridColumn column = new UltraGridColumn(); //"ShortName", "Short Name", ColumnType.NotSet, ""); //();
column.BaseColumnName = "ShortName";
column.Key = "ShortName";
column.Width = Unit.Percentage(100.0);
column.ValueList.DisplayMember = "ShortName";
column.Header.Caption = "Short Name";
UltraWebGrid1.Columns.Add(column);
// Paging 
layout.Pager.MinimumPagesForDisplay = 1;
layout.Pager.PageSize = 5;
layout.Pager.AllowPaging = true;
layout.Pager.ChangeLinksColor = false;
layout.Pager.NextText = "Next";
layout.Pager.PrevText = "Previous";
layout.Pager.StyleMode = PagerStyleMode.PrevNext;
// Not sure if I need this...
layout.ActivationObject.BorderColor = System.Drawing.Color.Empty;layout.ActivationObject.BorderWidth = Unit.Empty;
}
 
}
}
 
 
 

Infragistics2.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="InfragristicsGrid2.aspx.cs" Inherits="MyTestWebApplication.InfragristicsGrid2" %>
<%@ Register Assembly="Infragistics2.WebUI.UltraWebGrid.v8.1, Version=8.1.20081.1000, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"
Namespace="Infragistics.WebUI.UltraWebGrid" TagPrefix="igtbl" %>
<!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>Untitled Page</title></head>
<body>
<form id="form1" runat="server">
<div>
<igtbl:UltraWebGrid ID="UltraWebGrid1" runat="server" Width="905px" Height="238px" Browser="Xml" OnInitializeDataSource="UltraWebGrid1_InitializeDataSource">
<Bands>
<igtbl:UltraGridBand>
<AddNewRow View="NotSet" Visible="NotSet">
</AddNewRow>
</igtbl:UltraGridBand>
</Bands>
<DisplayLayout AllowColSizingDefault="Free"
AllowSortingDefault="OnClient" BorderCollapseDefault="Separate"
HeaderClickActionDefault="SortSingle" Name="UltraWebGrid1" RowHeightDefault="20px"
RowSelectorsDefault="No" TableLayout="Fixed" Version="4.00" UseFixedHeaders="True" LoadOnDemand="Xml">
<Pager MinimumPagesForDisplay="2" AllowPaging="True" StyleMode="PrevNext" PageSize="10">
</Pager>
<FrameStyle Height="238px" Width="905px">
</FrameStyle>
</DisplayLayout>
</igtbl:UltraWebGrid>
</div>
</form></body>
</html>

Infragistics2.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MyTestData.DataSetTableAdapters;
using MyTestData.Properties;
namespace MyTestWebApplication
{
public partial class InfragristicsGrid2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
InitDataSource();
}
private void InitDataSource()
{
CommitteeTableAdapter ta = new CommitteeTableAdapter();
MyTestData.DataSet.CommitteeDataTable tbCommittee = ta.GetData();
DataView dvCommittee = new DataView(tbCommittee);dvCommittee.Sort = "ShortName";
UltraWebGrid1.DataSource = dvCommittee;
UltraWebGrid1.DataBind();
}
protected void UltraWebGrid1_InitializeDataSource(object sender, Infragistics.WebUI.UltraWebGrid.UltraGridEventArgs e)
{
InitDataSource();
}
}
}
Parents
  • 184
    posted

    OK I sorted this out myself.  I had to move these lines:

    FormatGrid(); 

    this.FindControl("GridPlaceholder").Controls.Add(UltraWebGrid1);

    from Page_Load into a Page_Init method on Infragistics.aspx.cs.  Then in the Page_Load method I call the method to bind the grid.

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