Hello Tacho. Thank you a lot for the idea. In my case i am using ObjectDataSource to populate webdropdown and the grid .

I am having an issue to refresh the grid. When i debug i can see it's going to correct functions and grid is loading with new dataset .but it's not showing up on the UI, not refreshing .
Can you please give me advise how i can try to fix this issue?
Here is my sample code, I have webdropdown, ObjectDataSource and WebDataGrid inside the updatepanel.

      <ig:WebDropDown ID="wddCaseStatus" runat="server"
                 DataSourceID="ODS_Status"   TextField ="myName" ValueField="myID"  OnSelectionChanged="wdd_SelectionChanged"
                 AutoPostBack ="false" AutoPostBackFlags-SelectionChanged="Async"  DisplayMode="DropDownList" CssClass="WebDropDown" Width="300px"
                 >
            </ig:WebDropDown>
   <asp:ObjectDataSource ID="ODS_Status" runat="server"
            SelectMethod="getDDL"
            TypeName="DataLayer.DLCACaseStory"
            OnSelecting="ODS_Status_Selecting">
            <SelectParameters >
                <asp:Parameter DbType="String" Direction="Input" Name="sDDLType"  DefaultValue="CASE_STATUS" />
            </SelectParameters>
        </asp:ObjectDataSource>
  
  <asp:ObjectDataSource ID="ODS_Case" runat="server"
                TypeName="DataLayer.DLCACaseStory"
                SelectMethod="getCaseStory"
                DataObjectTypeName="BusinessObjects.ActionableCase"
                SortParameterName="sortExpression"
                OnSelecting="ODSCaseSelecting">
                <SelectParameters >
                    <asp:Parameter Name="iCaseType"
                        DbType="String" Direction="Input" DefaultValue="0" />
                    <asp:Parameter Name="sCaseStatus"
                        DefaultValue="0" DbType="String" Direction="Input" />
                    <asp:Parameter DbType="Int32" Direction="Input" Name="iCaseID"  DefaultValue="0" />
                </SelectParameters>
            </asp:ObjectDataSource>
    <asp:UpdatePanel ID="UPCaseSummary" runat="server" Visible="true" UpdateMode="Conditional" >
        <ContentTemplate>
           <div id="CaseStory" style="OVERFLOW: auto; WIDTH: 100%; HEIGHT: auto; margin-left: 20px; color: Black;">
         
            <ig:WebDataGrid ID="WebDGCase" DataKeyFields="ACTIONABLE_CASE_ID" runat="server" AutoGenerateColumns="False"
                AutoCRUD="true" Height="400px" Width="100%" DataSourceID="ODS_Case"  EnableAjax="false"
                OnInitializeRow="WebDGCase_InitializeRow" BackColor="White" ViewStateMode="Enabled"
                OnLoad ="DataGrid1_Load"  >
                <Columns>
                    <ig:BoundDataField DataFieldName="ACTIONABLE_CASE_ID" Key="ACTIONABLE_CASE_ID" >
                        <Header Text="Case ID" />
                    </ig:BoundDataField>
                    <ig:BoundDataField DataFieldName="ACTIONABLE_CASE_TYPE_NAME" Key="ACTIONABLE_CASE_TYPE_NAME" >
                        <Header Text="Case Type" />
                    </ig:BoundDataField>
                    <ig:BoundDataField DataFieldName="STATUS_CODE" Key="STATUS_CODE" >
                        <Header Text="Status Code" />
                    </ig:BoundDataField>
                    <ig:BoundDataField DataFieldName="STATUS_NAME" Key="STATUS_NAME" >
                        <Header Text="Status Name" />
                    </ig:BoundDataField>
                    <ig:BoundDataField DataFieldName="StartDate" Key="StartDate" >
                        <Header Text="Start Date" />
                    </ig:BoundDataField>
                    <ig:BoundDataField DataFieldName="KeyValueList" Key="KeyValueList" >
                        <Header Text="Key Values" />
                    </ig:BoundDataField>
                </Columns>
                <Behaviors>
                    <ig:Activation Enabled="true" />
                    <ig:Selection RowSelectType="Single" Enabled="true" >
                    </ig:Selection>
                    <ig:Paging PagerAppearance="Bottom" PageSize="20" Enabled="true" />
                    <ig:RowSelectors Enabled="true" RowNumbering="true" RowSelectorClientEvents-RowSelectorClicked="WebDGCase_RowSelectorClicked"/>
                    <ig:Sorting SortingMode="Single" Enabled="true" />
                    <ig:ColumnMoving Enabled="false" />
                    <ig:ColumnResizing Enabled="true" />
                    <ig:EditingCore>
                        <Behaviors>
                            <ig:CellEditing Enabled="false"></ig:CellEditing>
                            <ig:RowAdding Enabled="false" />
                            <ig:RowDeleting Enabled="false" />
                        </Behaviors>
                    </ig:EditingCore>
                    <ig:SummaryRow Enabled="false" />
                    <ig:Filtering Alignment="Top" Visibility="Visible" FilterType="ExcelStyleFilter" AnimationEnabled="true" > </ig:Filtering>
                </Behaviors>
            </ig:WebDataGrid>
      
      </div>
        </ContentTemplate>
      
    </asp:UpdatePanel>   
 
 
   
   

Hello Svetlana,

Thank you for the code-snippet you have provided.

Since I cannot refer directly to the code you have used in code-behind, along with any additional logic for the application you have used, I was not able to reproduce the issue you have described in regards to the not rendering grid.

Would you please modify the sample I have attached in my previous reply, so the issue is isolated and reproduced and send it back to me? Having this information will help me further investigate this matter for you.

If you have any questions, please let me know.

Sincerely,
Tacho
Associate Software Developer

HI Tacho. Thank you for looking at my issue.

I simplify my code and now I have only a drop down and a text box inside the panel. I also using master page.

I would like when drop down selected change only update textbox that is inside Panel's content , I do not want to get fully page post back. In case when I have <AutoPostBackFlags SelectionChanged="On" it’s updating textbox, but it’s reload my page.

Here is my aspx page

<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPages/CAL.Master" AutoEventWireup="true" CodeBehind="CALSumTest.aspx.cs" Inherits="CompliancePortal.CACPages.CALSumTest" Async="true" %>

<%@ Register assembly="Infragistics4.Web.v16.1, Version=16.1.20161.2236, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.ListControls" tagprefix="ig" %>

<%@ Register assembly="Infragistics4.Web.v16.1, Version=16.1.20161.2236, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.GridControls" tagprefix="ig" %>

<%@ Register assembly="Infragistics4.Web.v16.1, Version=16.1.20161.2236, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.EditorControls" tagprefix="ig" %>

<asp:Content ID="CntMain" ContentPlaceHolderID="MainContentPH" runat="server">

   <br />

       <div id="dCaseType" style="width:50%; float:left;">

             <ig:WebDropDown ID="wddCaseType" runat="server"

                   TextField ="myName" ValueField="myID"

               CssClass="WebDropDown" Width="300px" OnSelectionChanged="dropDown_SelectionChanged" >

                 <AutoPostBackFlags SelectionChanged="Async" />

                 <Items>

               <ig:DropDownItem Selected="False" Text="a" Value="">

               </ig:DropDownItem>

               <ig:DropDownItem Selected="False" Text="b" Value="">

               </ig:DropDownItem>

               <ig:DropDownItem Selected="False" Text="c" Value="">

               </ig:DropDownItem>

           </Items>

           </ig:WebDropDown>

       </div>

   <asp:UpdatePanel ID="upCaseGrid" runat="server" UpdateMode="Conditional">

       <ContentTemplate >

           <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

       </ContentTemplate>

   </asp:UpdatePanel>

</asp:Content>

My cs:

namespace CompliancePortal.CACPages

{

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

   {

       protected void Page_Load(object sender, EventArgs e)

       {

               this.TextBox1.Text = "";

       }

       protected void dropDown_SelectionChanged(object sender, Infragistics.Web.UI.ListControls.DropDownSelectionChangedEventArgs e)

       {

           this.TextBox1.Text = "test";

           this.upCaseGrid.Update();

       }

   }

}

Master Page cs : CACMaster

namespace CompliancePortal.MasterPages

{

   public partial class CACMaster : System.Web.UI.MasterPage

   {

       protected void Page_Load(object sender, EventArgs e)

       {

       }

   }

}