Hi,

Sure, here's the code:

I have a datagrid within an updatepanel:

 <asp:UpdatePanel ID="dataGridUpdPnl" runat="server" >
                                <ContentTemplate>
                                    <ig:WebDataGrid ID="reportDataIGGrd" runat="server" AutoGenerateColumns="false" InitialExpandDepth="0"
                                        InitialDataBindDepth="0" EnableDataViewState="true" DataKeyFields="Report" EnableAjax="true"
                                        AjaxIndicator-Enabled="True" AjaxIndicator-BlockArea="Control" AjaxIndicator-BlockCssClass="ig_AjaxIndicatorBlock" Height="100%" Width="100%">
                                        <Columns>
                                        </Columns>
                                        <Behaviors>
                                            <ig:Activation Enabled="true" />
                                            <ig:Selection RowSelectType="Multiple" CellClickAction="Row" Enabled="true" />
                                            <ig:Sorting SortingMode="Single" Enabled="true" />
                                            <ig:Filtering Alignment="Top" Visibility="Visible" Enabled="true" AnimationEnabled="true"  />
                                            <ig:Paging PagerAppearance="Both" PagerMode="NumericFirstLast"   
                                                    QuickPages="3" PageSize='<%$ appSettings:PageSize_ReportDataMapGrid%>'
                                                    FirstPageText="First" LastPageText="Last" > 
                                                </ig:Paging>
                                        </Behaviors>
                                        <EmptyRowsTemplate>
                                            <div style="text-align: center;">
                                                <br />
                                                <br />
                                                <img src="Images/information.gif" alt="!" align="middle" />
                                                &nbsp;&nbsp;&nbsp;
                                                <asp:Label ID="noDataLabel" runat="server" Text="No records found." Font-Size="Small"
                                                    ForeColor="#000099" Font-Bold="True">
                                                </asp:Label>
                                            </div>
                                        </EmptyRowsTemplate>
                                        <ErrorTemplate>
                                            <div style="text-align: center; width: 800px;">
                                                <img src="Images/error.png" alt="!" align="middle" />
                                                &nbsp;&nbsp;&nbsp;
                                                <asp:Label ID="errorLabel" runat="server" Text="An error has occurred! Please contact support."
                                                    Font-Size="Small" ForeColor="#CC0000" Font-Bold="True">
                                                </asp:Label>
                                            </div>
                                        </ErrorTemplate>
                                        <ClientEvents Initialize="intializeGrid" />
                                       
                                    </ig:WebDataGrid>
                                   
                                </ContentTemplate>
                                <Triggers>
                                    <asp:AsyncPostBackTrigger ControlID="btnClear" EventName="Click" />
                                </Triggers>
                            </asp:UpdatePanel> 

the grid is part of a custom control. When the page call the ExecuteReport method on the custom control, the grid is loaded and binded.

For the filtering, sorting and paging to work, I have this in the page_load method:

if (this.IsPostBack && this.ReportData != null)
        {
                this.reportDataIGGrd.Columns["TimeInMinutes"].FormatFieldMethod += new FormatRecordItemValue(FormatTimeSpan);
                this.reportDataIGGrd.DataSource = this.ReportData;
        }

The ReportData property is a cached CollectionBase object containing a list of reportdatarow objects (custom).

I have 2 problems:

1 - My page has another UpdatePanel. When the page updatepanel is triggered, my custom control page_load is called and the datasource is set in the page_load. This cause the grid to be emptied on my screen.

2- In my custom control, I have a button that causes a postback. When the page is posted back, I have to read the grid selection, but because the datasource is set, the list of selected rows is cleared. I tried to read the grid selection obejct before setting the datasource, but it is empty in the page_load. I can't access it before getting in the OnClick event of my button.

So, my question is, is it possible to know when the grid is posting back for a filtering, paging or sorting event to make sure I only set the datasource when one of these events are happening?

 Thanks

Yves

.

ok, I had to use both "ing" and "ed" methods, The "ing" to set the hidden field value and the "ed" to clear it., because even if I was clearing the hidden field value from the server, the value was always sent back on postbacks even if the hiddenfied was in the update panel with the grid...

Thanks for your help