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Detailtables Lose Datasource on Edit / Insert

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Grid

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

Mitchell asked on 13 Jul 2010, 01:52 PM

Hey guys, I have a page with a radgrid setup with one detail table under my mastertableview and two detail tables under the first detail table. If there is no data in either of the second level of detail tables there will be a gridbutton column visible to add new data. If we add or edit that data, the adjacent detailtable row loses its datasource and we no longer see the column. How can i prevent this?

Here is how my grid is setup:

<telerik:RadGrid runat="server" ID="rgReportGrid" AutoGenerateColumns="False"

BorderColor="Navy" BorderWidth="2px" GridLines="None" AllowSorting="true" Width="100%">

<MasterTableView DataKeyNames="BASE_ISSUE_ID" AutoGenerateColumns="false" CommandItemDisplay="Top">

<CommandItemSettings ShowRefreshButton="false" AddNewRecordText="Add New Base Issue" />

<DetailTables>

<telerik:GridTableView Name="ChildDescription" DataKeyNames="ISSUE_ID, ISSUE_NUMBER" Width="100%">

<DetailTables>

<telerik:GridTableView Name="CDNData" DataKeyNames="ID, BASE_ISSUE_NUM, LIST_ID" Width="100%">

<Columns>

<telerik:GridButtonColumn ButtonType="LinkButton" HeaderText="Add New Issue" Text="Add Issue" UniqueName="AddCDNIssue" Visible="false"

CommandName="AddNewIssue" CommandArgument="CDN">

</telerik:GridButtonColumn>

<telerik:GridEditCommandColumn HeaderText="Edit" UniqueName="EditCommandColumn" Visible="true">

</telerik:GridEditCommandColumn>

<telerik:GridButtonColumn ButtonType="LinkButton" HeaderText="Delete" UniqueName="DeleteCommandColumn" CommandName="DeleteSelectedSub" Text="Delete"

ConfirmDialogType="Classic" ConfirmText="Delete Selected Known Issue?">

</telerik:GridButtonColumn>

<telerik:GridBoundColumn HeaderText="Affects CDN" DataField="CDN">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Identified In Version" DataField="IDENTIFIED_IN_VERSION">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Date Published" DataField="PUBLISHED_DT">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Category" DataField="CATEGORY">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="PR #" DataField="PR">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="EMS #" DataField="EMS">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Fixed Status" DataField="FIXED_STATUS">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Fixed Date" DataField="FIXED_DATE">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Ending Build" DataField="ENDING_BUILD">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Issue ID" DataField="ID" Visible="false">

</telerik:GridBoundColumn>

<telerik:GridboundColumn HeaderText="Base Issue ID" DataField="BASE_ISSUE_NUM" Visible="false">

</telerik:GridboundColumn>

<telerik:GridBoundColumn HeaderText="List ID" DataField="LIST_ID" Visible="false">

</telerik:GridBoundColumn>

</Columns>

<EditFormSettings UserControlName="Known_Issue.ascx" EditFormType="WebUserControl">

</EditFormSettings>

</telerik:GridTableView>

<telerik:GridTableView Name="USAData" DataKeyNames="ID, BASE_ISSUE_NUM, LIST_ID" Width="100%">

<Columns>

<telerik:GridButtonColumn ButtonType="LinkButton" HeaderText="Add New Issue" Text="Add Issue" UniqueName="AddUSAIssue" Visible="false"

CommandName="AddNewIssue" CommandArgument="USA">

</telerik:GridButtonColumn>

<telerik:GridEditCommandColumn HeaderText="Edit" UniqueName="EditCommandColumn" Visible="true">

</telerik:GridEditCommandColumn>

<telerik:GridButtonColumn ButtonType="LinkButton" HeaderText="Delete" UniqueName="DeleteCommandColumn" CommandName="DeleteSelectedSub" Text="Delete"

ConfirmDialogType="Classic" ConfirmText="Delete Selected Known Issue?">

</telerik:GridButtonColumn>

<telerik:GridBoundColumn HeaderText="Affects USA" DataField="USA">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Identified In Version" DataField="IDENTIFIED_IN_VERSION">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Date Published" DataField="PUBLISHED_DT">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Category" DataField="CATEGORY">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="PR #" DataField="PR">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="EMS #" DataField="EMS">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Fixed Status" DataField="FIXED_STATUS">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Fixed Date" DataField="FIXED_DATE">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Ending Build" DataField="ENDING_BUILD">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Issue ID" DataField="ID" Visible="false">

</telerik:GridBoundColumn>

<telerik:GridboundColumn HeaderText="Base Issue ID" DataField="BASE_ISSUE_NUM" Visible="false">

</telerik:GridboundColumn>

<telerik:GridBoundColumn HeaderText="List ID" DataField="LIST_ID" Visible="false">

</telerik:GridBoundColumn>

</Columns>

<EditFormSettings UserControlName="Known_Issue.ascx" EditFormType="WebUserControl" >

</EditFormSettings>

</telerik:GridTableView>

</DetailTables>

<Columns>

<telerik:GridBoundColumn HeaderText="Description" DataField="DESCRIPTION">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Work Around" DataField="WORK_AROUND">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Work Around Description" DataField="WORK_AROUND_DESCRIPTION">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Issue ID" DataField="ISSUE_ID" Visible="False">

</telerik:GridBoundColumn>

</Columns>

</telerik:GridTableView>

</DetailTables>

<Columns>

<telerik:GridEditCommandColumn HeaderText="Edit" UniqueName="EditCommandColumn">

</telerik:GridEditCommandColumn>

<telerik:GridButtonColumn ButtonType="LinkButton" HeaderText="Delete" UniqueName="DeleteCommandColumn" CommandName="DeleteSelected" Text="Delete"

ConfirmDialogType="Classic" ConfirmText="Delete Selected Known Issue Base?">

</telerik:GridButtonColumn>

<telerik:GridBoundColumn HeaderText="Issue Number" DataField="BASE_ISSUE_NUM">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Title" DataField="TITLE">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Internal Status" DataField="INTERNAL_STATUS">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Internal Status Comments" DataField="INTERNAL_STATUS_COMMENT">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Severity" DataField="SEVERITY">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Affects CDN" DataField="CDN">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Affects USA" DataField="USA">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn HeaderText="Issue ID" DataField="BASE_ISSUE_ID" Visible="false">

</telerik:GridBoundColumn>

</Columns>

<EditFormSettings UserControlName="Known_Issue_Base.ascx" EditFormType="WebUserControl">

</EditFormSettings>

</MasterTableView>

</telerik:RadGrid>

6 Answers, 1 is accepted

answered on 15 Jul 2010, 02:08 PM

Hi Mitchell,

Losing data on update/insert or other grid operation often indicates misconfigured databinding for your RadGrid's master and detail tables. To properly setup databinding, refer to the 2 supported databinding mechanisms with hierarchical grid structure:

1. Hierarchical databinding using declarative data source controls

2. Hierarchical databinding using the DetailTableDataBind event

Only these two databinding scenarios are supported with hierarchical tables in RadGrid, so make sure you follow one of the two.

Regards,
Veli
the Telerik team

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answered on 18 Apr 2011, 11:52 AM

Hello Carlos,

If your detail table data shows OK the first you expand a parent item, it means the DetailTableDataBind event is firing OK and your detail table gets properly databound. The fact that you do not get any data when clicking on Edit indicates the DetailTableDataBind event is not properly databinding your detail table. To troubleshoot, verify the following 2 conditions:

1. The event handler is properly attached on postback. The sample code you provided does not indicate where and how you attach your event handlers. You need to make sure they are attached on every postback.

2. The DetailTableDataBind event is executing OK without any exceptions. As you are using a try-catch block in your event handler, an exception thrown during its execution may prevent proper detail table databinding. You can temporarily remove the try-catch block and verify the code runs OK.

Veli
the Telerik team

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answered on 18 Apr 2011, 10:28 PM

Veli Hello such!
Event handlers are declared in the Page_Load method and are as follows:

// EVENTOS DEL GRID DE ORDENES DE COMPRA

radGriOrdCompras.DetailTableDataBind += new Telerik.Web.UI.GridDetailTableDataBindEventHandler(radGriOrdCompras_DetailTableDataBind);

radGriOrdCompras.MasterTableView.DetailTables.OwnerGrid.ItemDataBound += new Telerik.Web.UI.GridItemEventHandler(OwnerGrid_ItemDataBound);

radGriOrdCompras.DeleteCommand += new Telerik.Web.UI.GridCommandEventHandler(radGriOrdCompras_DeleteCommand);

// EVENTOS DEL GRID DE PRODUCTOS SELECCIONADOS

radGriOrdComDetalles.NeedDataSource += new Telerik.Web.UI.GridNeedDataSourceEventHandler(radGriOrdComDetalles_NeedDataSource);

radGriOrdComDetalles.DetailTableDataBind += new Telerik.Web.UI.GridDetailTableDataBindEventHandler(radGriOrdComDetalles_DetailTableDataBind);

radGriOrdComDetalles.ItemDataBound += new Telerik.Web.UI.GridItemEventHandler(radGriOrdComDetalles_ItemDataBound);

radGriOrdComDetalles.ItemCreated += new Telerik.Web.UI.GridItemEventHandler(radGriOrdComDetalles_ItemCreated);

radGriOrdComDetalles.ItemCommand += new Telerik.Web.UI.GridCommandEventHandler(radGriOrdComDetalles_ItemCommand);

When removing try-catch block does not generate any exception. When I click the edit button, to make the Postback only runs the Page_Load method and no method is executed DetailTableDataBind.