DevExpress-Examples/asp-net-web-forms-grid-master-detail-implementation

Use a detail row template to display master-detail data.

Grid View for ASP.NET Web Forms - Simple master-detail implementation

This example demonstrates how to use a detail row template to display master-detail data.

Overview

Follow the steps below to enable the master-detail functionality:

1. Create a master Grid View control, bind it to a data source, and enable the grid's ShowDetailRow property.

   <dx:ASPxGridView ID="masterGrid" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSourceCustomers" KeyFieldName="CustomerID" ... >
       <!-- ... -->
       <SettingsDetail ShowDetailRow="True" />
   </dx:ASPxGridView>

2. Specify the master grid's GridViewTemplates.DetailRow property and add a detail grid to the template. Bind the detail grid to a data source and handle the grid's server-side BeforePerformDataSelect event. In the handler, call the grid's GetMasterRowKeyValue method to obtain the key value of the corresponding row in the master grid.

   <Templates>
       <DetailRow>
           <dx:ASPxGridView ID="detailGrid" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSourceOrders"
               KeyFieldName="OrderID" OnBeforePerformDataSelect="detailGrid_BeforePerformDataSelect" ... >
               <!-- ... -->
           </dx:ASPxGridView>
       </DetailRow>
   </Templates>

   protected void detailGrid_BeforePerformDataSelect(object sender, EventArgs e) {
   	Session["CustomerID"] = (sender as ASPxGridView).GetMasterRowKeyValue();
   }

3. Handle the grid's server-side RowDeleting, RowInserting, and RowUpdating events to configure the grid's edit functionality.

Files to Review

• Default.aspx (VB: Default.aspx)
• Default.aspx.cs (VB: Default.aspx.vb)

Documentation

• Master-Detail Relationship

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