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Hierarchical grid: null is null or not an object

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Grid

This is a migrated thread and some comments may be shown as answers.

Marco Rosignoli asked on 13 Dec 2010, 03:54 PM


 

 

<telerik:RadCodeBlock ID="RadCodeBlock2" runat="server">

<script type="text/javascript">

<!--

function gridCommand(sender, args) {

    if (args.get_commandName() == "DownloadAttachment") {

        var manager = $find('<%= RadAjaxManager.GetCurrent(Page).ClientID %>');

        manager.set_enableAJAX(false);

        setTimeout(function () {

            manager.set_enableAJAX(true);

        }, 0);

    }

}

-->

</script>

</telerik:RadCodeBlock>

telerik:RadGrid ID="RadGrid1" DataSourceID="SqlDataSource1" runat="server" ShowStatusBar="false"

AutoGenerateColumns="false" PageSize="3" AllowSorting="false" AllowMultiRowSelection="false"

AllowPaging="false" GridLines="None" AllowAutomaticDeletes=

"true"

AllowAutomaticInserts="true" AllowAutomaticUpdates="true">

<PagerStyle Mode="NumericPages"></PagerStyle>

<MasterTableView DataSourceID="SqlDataSource1" DataKeyNames="id_manifestazione" AllowMultiColumnSorting="false"

Width="100%" CommandItemDisplay="Top" Name="Master">

<DetailTables>

<telerik:GridTableView DataKeyNames="ID" DataSourceID="SqlDataSourceDetailTable" Width="100%"

runat="server" CommandItemDisplay="Top" Name="Detail">

<ParentTableRelation>

<telerik:GridRelationFields DetailKeyField="id_manifestazione" MasterKeyField="id_manifestazione" />

</ParentTableRelation>

<Columns>

<telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCommandColumn2">

<HeaderStyle Width="20px" />

<ItemStyle CssClass="MyImageButton" />

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="tipo_file" Visible="true" HeaderText="Tipo file">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn SortExpression="ID" HeaderText="ID" HeaderButtonType="TextButton"

DataField="ID" UniqueName="ID" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="UploadedBy" Visible="false" ReadOnly="true" HeaderText="Proprietario file">

</telerik:GridBoundColumn>

<telerik:GridAttachmentColumn DataSourceID="SqlDataSource2"

MaxFileSize="1048576"

EditFormHeaderTextFormat="Upload File:"

HeaderText="Download"

AttachmentDataField="BinaryData"

AttachmentKeyFields="ID"

FileNameTextField="FileName"

DataTextField="FileName"

UniqueName="AttachmentColumn">

</telerik:GridAttachmentColumn>

<telerik:GridBoundColumn DataField="FileName" Visible="false" HeaderText="FileName">

</telerik:GridBoundColumn>

<telerik:GridButtonColumn ConfirmText="Eliminare il file selezionato?" ConfirmDialogType="RadWindow"

ConfirmTitle="Cancellazione file" ButtonType="ImageButton" CommandName="Delete" Text="Elimina"

UniqueName="DeleteColumnDetail">

<ItemStyle HorizontalAlign="Center" CssClass="MyImageButton" />

</telerik:GridButtonColumn>

</Columns>

<SortExpressions>

<telerik:GridSortExpression FieldName="tipo_file"></telerik:GridSortExpression>

</SortExpressions>

</telerik:GridTableView>

</DetailTables>

<Columns>

<telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCommandColumn">

<HeaderStyle Width="20px" />

<ItemStyle CssClass="MyImageButton" />

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="id_manifestazione" UniqueName="id_manifestazione" Visible="false" ReadOnly="true"></telerik:GridBoundColumn>

<telerik:GridDropDownColumn DataField="id_attivita" DataSourceID="dsAttivita"

ListTextField="descrizione" ListValueField="ID_attivita" Display="true" Visible="true"

HeaderText="Attività" SortExpression="descrizione"

UniqueName="id_attivita" ColumnEditorID="GridTextBoxColumnEditor1"></telerik:GridDropDownColumn>

<telerik:GridBoundColumn SortExpression="manifestazione" HeaderText="manifestazione" HeaderButtonType="TextButton"

DataField="manifestazione" UniqueName="manifestazione">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="luogo_data" HeaderText="Luogo e data" SortExpression="luogo_data"

UniqueName="luogo_data" ColumnEditorID="GridTextBoxColumnEditor1">

</telerik:GridBoundColumn>

<telerik:GridButtonColumn ConfirmText="Eliminare la manifestazione selezionata?" ConfirmDialogType="RadWindow"

ConfirmTitle="Cancellazione manifestazione" ButtonType="ImageButton" CommandName="Delete" Text="Elimina"

UniqueName="DeleteColumn">

<ItemStyle HorizontalAlign="Center" CssClass="MyImageButton" />

</telerik:GridButtonColumn>

</Columns>

<SortExpressions>

<telerik:GridSortExpression FieldName="id_manifestazione"></telerik:GridSortExpression>

</SortExpressions>

</MasterTableView>

<ClientSettings>

<ClientEvents OnCommand="gridCommand" />

</ClientSettings>

</telerik:RadGrid>

Hi,
I have a hierarchical grid. If I insert a <ClientSettings> tags when I update data in detail table, I get javascript's error "null is null or not an object".
Can someone help me?
thanks,
Marco

3 Answers, 1 is accepted

answered on 16 Dec 2010, 01:21 PM

Hi Marco,

Note that it is not supported to attached client commands (OnCommand) in server bind Grid as the DetailTable ID could not be correctly resolved. It could be only used when you have client data binding. The functionality you need to achieve could be correctly handled in the Ajax OnRequestStart event.

Best wishes,
Maria Ilieva
the Telerik team

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