master detail using gridview and detailsview ASP.NET c#/vb.net

master detail using gridview and detailsview,master detail with gridview and detailsview,asp.net master detail gridview detailsview, with SQLDataSource
C#/VB.NET
This example explains how to do Master details replationship in asp.net using GridView and DetailsView SQLDataSource used as a DataSource.
This example connects to northwnd database 
Download NorthWnd Database from

1. GridView has Order details(which has orderid,EmployeeID etc.,)
2. DetailsView displays Employee details for each order.

Step 1)  Add GridView and DetailsView to aspx page
Step 2) Add SQL-DATASOURCE1  for orders table
Step 2) Add SQL-DATASOURCE2 for Employees table
                 This is filtered based on EmployeeID of Orders Table.
 Because whenever u select order in GridView corresponding Employee details will be displayed

 DataKeyNames in GridView and DetailsView must be EmployeeID 

for GridView1 which has orders each order is associated with orderID, here we are filtering/displaying Based on Employeed ID, not OrderID, so in GridView DataKeyNames should be "EmployeeID"


        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>" SelectCommand="SELECT DISTINCT * FROM [Orders] ">
        </asp:SqlDataSource>
        <asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
            SelectCommand="SELECT [EmployeeID], [LastName], [FirstName], [Title], [TitleOfCourtesy], [BirthDate], [HireDate], [Address], [City], [Region], [PostalCode], [Country], [HomePhone], [Photo], [ReportsTo] FROM [Employees] WHERE ([EmployeeID] = @EmployeeID)">
            <SelectParameters>
                <asp:ControlParameter ControlID="GridView1" Name="EmployeeID" PropertyName="SelectedValue" Type="Int32" />
            </SelectParameters>
        </asp:SqlDataSource>
      <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="EmployeeID"
             DataSourceID="SqlDataSource1" AutoGenerateSelectButton="True" AllowPaging="True"
            PagerSettings-PageButtonCount="5" PageSize="5">
            <Columns>
                <asp:BoundField  DataField="OrderID" HeaderText="OrderID" InsertVisible="False" ReadOnly="True" SortExpression="OrderID" />
                <asp:BoundField DataField="CustomerID" HeaderText="CustomerID" SortExpression="CustomerID" />
                <asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" SortExpression="EmployeeID" />
                <asp:BoundField DataField="OrderDate" HeaderText="OrderDate" SortExpression="OrderDate" />
                <asp:BoundField DataField="RequiredDate" HeaderText="RequiredDate" SortExpression="RequiredDate" />
                <asp:BoundField DataField="ShippedDate" HeaderText="ShippedDate" SortExpression="ShippedDate" />
                <asp:BoundField DataField="ShipVia" HeaderText="ShipVia" SortExpression="ShipVia" />
                <asp:BoundField DataField="Freight" HeaderText="Freight" SortExpression="Freight" />
                <asp:BoundField DataField="ShipName" HeaderText="ShipName" SortExpression="ShipName" />
                <asp:BoundField DataField="ShipAddress" HeaderText="ShipAddress" SortExpression="ShipAddress" />
                <asp:BoundField DataField="ShipCity" HeaderText="ShipCity" SortExpression="ShipCity" />
                <asp:BoundField DataField="ShipRegion" HeaderText="ShipRegion" SortExpression="ShipRegion" />
                <asp:BoundField DataField="ShipPostalCode" HeaderText="ShipPostalCode" SortExpression="ShipPostalCode" />
                <asp:BoundField DataField="ShipCountry" HeaderText="ShipCountry" SortExpression="ShipCountry" />
            </Columns>
            <PagerSettings PageButtonCount="5" />
            <SelectedRowStyle BackColor="#CC0000" />
        </asp:GridView>
        <asp:DetailsView ID="DetailsView1" runat="server" Height="50px" Width="125px" AutoGenerateRows="False"
            DataKeyNames="EmployeeID" DataSourceID="SqlDataSource2">
            <Fields>
                <asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" InsertVisible="False" ReadOnly="True" SortExpression="EmployeeID" />
                <asp:BoundField DataField="LastName" HeaderText="LastName" SortExpression="LastName" />
                <asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" />
                <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
                <asp:BoundField DataField="TitleOfCourtesy" HeaderText="TitleOfCourtesy" SortExpression="TitleOfCourtesy" />
                <asp:BoundField DataField="BirthDate" HeaderText="BirthDate" SortExpression="BirthDate" />
                <asp:BoundField DataField="HireDate" HeaderText="HireDate" SortExpression="HireDate" />
                <asp:BoundField DataField="Address" HeaderText="Address" SortExpression="Address" />
                <asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />
                <asp:BoundField DataField="Region" HeaderText="Region" SortExpression="Region" />
                <asp:BoundField DataField="PostalCode" HeaderText="PostalCode" SortExpression="PostalCode" />
                <asp:BoundField DataField="Country" HeaderText="Country" SortExpression="Country" />
                <asp:BoundField DataField="HomePhone" HeaderText="HomePhone" SortExpression="HomePhone" />
                <asp:BoundField DataField="ReportsTo" HeaderText="ReportsTo" SortExpression="ReportsTo" />
                <asp:TemplateField HeaderText="Photo">
                    <ItemTemplate>
                        <asp:Image  runat="server" ImageUrl='<%# Eval("Photo") %>' AlternateText="No Image Found" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Fields>
        </asp:DetailsView>

OUTPUT

master detail using gridview and detailsview,master detail with gridview and detailsview,asp.net master detail gridview detailsview, with SQLDataSource
master details gridview and detailsview using inline code sqldatasource