Unbound checkbox losing state after second postback

No, there is no databind statement, as I am handling InitializeDataSource event

Thanks for the quick response.

Here is the complete code that reproduces the behavior.

Default.ASPX

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>

<%@ Register Assembly="Infragistics35.WebUI.UltraWebGrid.v8.3, Version=8.3.20083.2021, 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">

</head>

<body>

<div>

<igtbl:UltraWebGrid ID="samplesListView" runat="server" Height="90%" Width="100%">

<DisplayLayout AutoGenerateColumns="false" ViewType="Flat" AllowColSizingDefault="Free"

AllowColumnMovingDefault="OnServer" AllowDeleteDefault="Yes" AllowSortingDefault="Yes"

AllowUpdateDefault="Yes" BorderCollapseDefault="Separate" HeaderClickActionDefault="SortMulti"

Name="UltraWebGrid1" RowHeightDefault="20px" RowSelectorsDefault="No" SelectTypeRowDefault="Extended"

StationaryMargins="No" StationaryMarginsOutlookGroupBy="True" TableLayout="Fixed"

Version="4.00">

<FrameStyle BackColor="Window" BorderColor="InactiveCaption" BorderStyle="Solid"

BorderWidth="1px" Font-Names="Microsoft Sans Serif" Font-Size="8.25pt" Height="90%"

Width="100%">

</FrameStyle>

<Pager MinimumPagesForDisplay="1" PageSize="4" AllowPaging="true" PagerAppearance="Both"

StyleMode="QuickPages" QuickPages="5">

</PagerStyle>

</Pager>

</EditCellStyleDefault>

</FooterStyleDefault>

</HeaderStyleDefault>

<RowStyleDefault BackColor="Window" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px"

Font-Names="Microsoft Sans Serif" Font-Size="8.25pt">

</RowStyleDefault>

</GroupByRowStyleDefault>

</BoxStyle>

</GroupByBox>

</BoxStyle>

</AddNewBox>

</ActivationObject>

<FilterDropDownStyle BackColor="White" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px"

CustomRules="overflow:auto;" Font-Names="Verdana,Arial,Helvetica,sans-serif"

Font-Size="11px" Height="300px" Width="200px">

</FilterDropDownStyle>

</FilterHighlightRowStyle>

<FilterOperandDropDownStyle BackColor="White" BorderColor="Silver" BorderStyle="Solid"

BorderWidth="1px" CustomRules="overflow:auto;" Font-Names="Verdana,Arial,Helvetica,sans-serif"

Font-Size="11px">

</FilterOperandDropDownStyle>

</FilterOptionsDefault>

</DisplayLayout>

<Bands>

<igtbl:UltraGridBand DataKeyField="CompleteSampleNo">

<igtbl:TemplatedColumn Width="1%">

</Header>

<asp:LinkButton ID="testLinkButton1" runat="server" Text="Test DataKey" CommandName="test1"

CommandArgument='<%# DataBinder.Eval(Container.DataItem, "CompleteSampleNo") %>' />

<asp:LinkButton ID="testLinkButton2" runat="server" Text="Test CommandArgument" CommandName="test2"

CommandArgument='<%# DataBinder.Eval(Container.DataItem, "CompleteSampleNo") %>' />

</CellTemplate>

</igtbl:TemplatedColumn>

<igtbl:UltraGridColumn Key="CompleteSampleNo" BaseColumnName="CompleteSampleNo" Width="1%">

</Header>

</Footer>

</igtbl:UltraGridColumn>

<igtbl:UltraGridColumn Key="Select" Type="CheckBox" DataType="System.Boolean" Width="1%"

AllowUpdate="Yes">

</Header>

</Footer>

</igtbl:UltraGridColumn>

</Columns>

</AddNewRow>

</igtbl:UltraGridBand>

</Bands>

</igtbl:UltraWebGrid>

<asp:Button ID="testPostback" runat="server" Text="Test Postback" />

</div>

</form>

</body>

</html>

Default.ASPX.CS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using Infragistics.WebUI.UltraWebGrid;

using System.Configuration;

using System.Data;

using System.IO;

public partial class Default : System.Web.UI.Page

{

protected void Page_Init(object sender, EventArgs e)

{

this.samplesListView.InitializeDataSource += new InitializeDataSourceEventHandler(samplesListView_InitializeDataSource);

}

public class Sample

{

public int Batch { get; set; }

public int SampleNumber { get; set; }

public string CompleteSampleNo

{

get

{

return string.Format("{0}-{1}", this.Batch, this.SampleNumber);

}

private void AddSamples(List<Sample> samplesList, int batch, int numberOfSamples)

{

for (int i = 1; i <= numberOfSamples; i++)

{

samplesList.Add(new Sample() { Batch = batch, SampleNumber = i });

}

void samplesListView_InitializeDataSource(object sender, UltraGridEventArgs e)

{

//prepare some dummy data for the grid

var batchesList = new List<Sample>();

AddSamples(batchesList, 112333, 4);

AddSamples(batchesList, 112334, 3);

AddSamples(batchesList, 112335, 1);

AddSamples(batchesList, 112336, 4);

samplesListView.DataSource = batchesList;

}

Regards,

MPVBRao.