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Edwin
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Object reference not set to an instance of an object.
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yo tengo una webdatagrid definido de la siguiente manera

                                                                                <asp:UpdatePanel ID="up_gridCustomers" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
                                                                                    <ContentTemplate>
                                                                                        <ig:WebDataGrid ID="uwg_gridCustomers" runat="server" Height="300px"
                                                                                            StyleSetName="XSALESNRO1" StyleSetPath="~/ig_res" AutoCRUD="true"  Width="800px" DefaultColumnWidth="100px" AutoGenerateColumns="True">                                                                                           
                                                                                            <Behaviors>      
                                                                                              <ig:Selection RowSelectType="Single" Enabled="true" />                                                                                  
                                                                                              <ig:Paging PagerAppearance="Bottom" PageSize="50" Enabled="true" />
                                                                                              <ig:RowSelectors Enabled="true" RowNumbering="true" />
                                                                                              <ig:ColumnMoving Enabled="true" />
                                                                                              <ig:ColumnResizing Enabled="true" />
                                                                                              <ig:Filtering Alignment="Top" Visibility="Visible" Enabled="true" AnimationEnabled="true" />
                                                                                              <ig:Sorting SortingMode="Single" Enabled="true" />                                                                                                                                                                                       
                                                                                              <ig:VirtualScrolling Enabled="true" ScrollingMode="Deferred" />
                                                                                            </Behaviors>                                                                                           
                                                                                        </ig:WebDataGrid>                                                                                                                                                                           
                                                                                    </ContentTemplate>
                                                                                </asp:UpdatePanel>

 

Cuando selecciono una fila me funciona perfecto.

Pero cuando selecciono una celda y luego presiono cualquier objeto link_button que tenga un proceso por el lado del servidor me genera el siguiente mensaje

- <Errors xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Procedure>/content/editTablesCustomers.a</Procedure>
  <Date>2/13/2012 2:38:58 PM</Date>
  <Message>Object reference not set to an instance of an object.</Message>
  <StackTrace>at Infragistics.Web.UI.GridControls.Selection.LoadPositionalProperty(Int32 index, Object value) at Infragistics.Web.UI.Framework.ObjectBase.LoadClientPropsTransactionList(Dictionary`2 list) at Infragistics.Web.UI.GridControls.Selection.LoadClientPropsTransactionList(Dictionary`2 list) at Infragistics.Web.UI.Framework.ObjectBase.LoadTransactionList(Boolean deferLoadPostDataProcessing) at Infragistics.Web.UI.Framework.ObjectBase.Infragistics.Web.UI.IClientState.LoadTransationList(Boolean deferLoadPostDataProcessing) at Infragistics.Web.UI.GridControls.GridBot.LoadClientObjectsTransactionList() at Infragistics.Web.UI.Framework.RunBot.HandleRaisePostDataChangedEvent() at Infragistics.Web.UI.GridControls.GridBot.HandleRaisePostDataChangedEvent() at Infragistics.Web.UI.Framework.Data.FlatDataBoundControl.RaisePostDataChangedEvent() at System.Web.UI.Page.RaiseChangedEvents() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)</StackTrace>
  </Errors>
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