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Vincent
1370
Childs are not populated on postback or expand button is not rendered
posted

Hi,

I got a problem on a WHDG with paging and binding on code behind. 
Childs are not filled after a post back.  

here the code :       

namespace WebApplication1
{
     public partial class Default : System.Web.UI.Page
    {
 
        public DataSet countryCustomersDataSet
        {
            get { if (Session["MyDataSet"] != null) return (DataSet)Session["MyDataSet"]; else return null; }
            set { Session["MyDataSet"] = value; } 
        }
 
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                LoadDataSet(true);
                this.MyGrid.DataMember = "Root";
                this.MyGrid.DataKeyFields = "Id";
 
            }
            this.MyGrid.DataSource = countryCustomersDataSet;
            this.MyGrid.DataBind();
        }
 
        private void LoadDataSet(bool reload)
        {
            if (!reload)
                return;
            DataSet ds = new DataSet();
 
            DataTable dt = new DataTable("Root");
            dt.Columns.Add("Id");
            dt.Columns.Add("BirthDate", typeof(DateTime));
            dt.Columns.Add("Name");
            dt.Rows.Add(new object[] { 101, "11/09/1980", "Chandradeep" });
            dt.Rows.Add(new object[] { 102, "11/10/1970", "MikeS" });
            dt.Rows.Add(new object[] { 103, "11/12/1875", "Luke" });
            dt.Rows.Add(new object[] { 104, "11/2/1988", "Sam" });
 
            // Child DataRecords.
            DataTable dt1 = new DataTable("Children1");
            dt1.Columns.Add("IdParent");
            dt1.Columns.Add("BirthDate");
            dt1.Columns.Add("Name");
 
            dt1.Rows.Add(new object[] { 101, "11/09/1980", "1Chandradeep" });
            dt1.Rows.Add(new object[] { 101, "11/09/1981", "1Chandradeep 2" });
            dt1.Rows.Add(new object[] { 101, "10/09/1979", "1Chandradeep 3" });
            dt1.Rows.Add(new object[] { 101, "11/09/1982", "1Chandradeep 4" });
 
            dt1.Rows.Add(new object[] { 102, "11/09/1980", "2MikeS" });
            dt1.Rows.Add(new object[] { 102, "11/09/1999", "2Step In" });
            dt1.Rows.Add(new object[] { 102, "11/12/1951", "2Step Out" });
 
            dt1.Rows.Add(new object[] { 103, "11/09/1980", "3Sandeep Patil" });
            dt1.Rows.Add(new object[] { 103, "11/09/1980", "3Step Out" });
 
            dt1.Rows.Add(new object[] { 104, "11/09/1980", "4Sandeep Patil" });
            dt1.Rows.Add(new object[] { 104, "11/09/1980", "4Step Out" });
            dt1.Rows.Add(new object[] { 104, "11/09/1980", "4Sandeep Patil" });
            dt1.Rows.Add(new object[] { 104, "11/09/1980", "4Step Out" });
  
            //Tables added to the Collections of DataSet
            ds.Tables.Add(dt);
            ds.Tables.Add(dt1);
             ds.Relations.Add(new DataRelation("relation1", dt.Columns[0], dt1.Columns[0]));
             countryCustomersDataSet = ds;
  
        }
 
        protected void btnTest_Click(object sender, EventArgs e)
        {
            lblResultat.Text = ((Button)sender).CommandArgument;
        }
    }
}

 
ASPX :
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" EnableEventValidation="false" Inherits="WebApplication1.Default" %>
 
<%@ Register assembly="Infragistics4.Web.v10.2, Version=10.2.20102.2129, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.GridControls" tagprefix="ig" %>
 
<!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:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:Label ID="lblResultat" runat="server" ></asp:Label>
         <ig:WebHierarchicalDataGrid ID="MyGrid" runat="server"  EnableViewState="true"
             DataMember="Root"  AutoGenerateBands="true" DataKeyFields="Id" AutoGenerateColumns="true" Key="parent"
            InitialDataBindDepth="-1" InitialExpandDepth="-1" Width="100%"
            >
            <Bands>
                <ig:Band Key="details" DataMember="Children1" DataKeyFields="IdParent" AutoGenerateColumns="false" >
                    <Columns >
                        <ig:BoundDataField DataFieldName="Name" Key="keyName"></ig:BoundDataField>
                        <ig:BoundDataField DataFieldName="BirthDate" Key="keyBirthDate"></ig:BoundDataField>
                        <ig:TemplateDataField Key="btnTest">
                            <ItemTemplate>
                                <asp:Button OnClick="btnTest_Click" runat="server" ID="btnTest" CommandArgument='<%# Eval("Name") %>' Text='<%# DataBinder.Eval(((Infragistics.Web.UI.TemplateContainer)Container).DataItem, "Name") %>' />
                            </ItemTemplate>
                        </ig:TemplateDataField>
                    </Columns>
                </ig:Band>
            </Bands>
 
         <Behaviors>
            <ig:Paging Enabled="true" PageSize=2></ig:Paging>
         </Behaviors>
    </ig:WebHierarchicalDataGrid>
 
    </div>
    </form>
</body>
</html>

 

When I click on button, the button postback event will be good but child will disappear and the expand button is not rendered

Why ?

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