Hi Warren,
Please refer below sample.
HTML
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
$("[src*=plus]").live("click", function () {
$(this).closest("tr").after("<tr><td></td><td colspan = '999'>" + $(this).next().html() + "</td></tr>")
$(this).attr("src", "images/minus.png");
});
$("[src*=minus]").live("click", function () {
$(this).attr("src", "images/plus.png");
$(this).closest("tr").next().remove();
});
</script>
<asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false" CssClass="Grid"
DataKeyNames="CustomerID" OnRowDataBound="OnRowDataBound">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<img alt="" style="cursor: pointer" src="images/plus.png" />
<asp:Panel ID="pnlOrders" runat="server" Style="display: none">
<asp:GridView ID="gvOrders" runat="server" AutoGenerateColumns="false" CssClass="ChildGrid">
<Columns>
<asp:TemplateField HeaderText="OrderId">
<ItemTemplate>
<asp:DropDownList ID="ddlOrderId" runat="server">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</asp:Panel>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField ItemStyle-Width="150px" DataField="ContactName" HeaderText="Contact Name" />
<asp:BoundField ItemStyle-Width="150px" DataField="City" HeaderText="City" />
</Columns>
</asp:GridView>
Namespaces
C#
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
Vb.Net
Imports System.Data.SqlClient
Imports System.Data
Code
C#
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gvCustomers.DataSource = GetData("select top 10 * from Customers");
gvCustomers.DataBind();
}
}
private static DataTable GetData(string query)
{
string strConnString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(strConnString))
{
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = query;
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataSet ds = new DataSet())
{
DataTable dt = new DataTable();
sda.Fill(dt);
return dt;
}
}
}
}
}
protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string customerId = gvCustomers.DataKeys[e.Row.RowIndex].Value.ToString();
GridView gvOrders = e.Row.FindControl("gvOrders") as GridView;
gvOrders.DataSource = GetData(string.Format("select top 3 * from Orders where CustomerId='{0}'", customerId));
gvOrders.DataBind();
foreach (GridViewRow row in gvOrders.Rows)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddlOrderId = row.FindControl("ddlOrderId") as DropDownList;
ddlOrderId.DataSource = GetData(string.Format("select top 3 OrderId, OrderDate from Orders where CustomerId='{0}'", customerId));
ddlOrderId.DataTextField = "OrderId";
ddlOrderId.DataValueField = "OrderDate";
ddlOrderId.DataBind();
}
}
}
}
VB.Net
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
If Not IsPostBack Then
gvCustomers.DataSource = GetData("select top 10 * from Customers")
gvCustomers.DataBind()
End If
End Sub
Private Shared Function GetData(query As String) As DataTable
Dim strConnString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using con As New SqlConnection(strConnString)
Using cmd As New SqlCommand()
cmd.CommandText = query
Using sda As New SqlDataAdapter()
cmd.Connection = con
sda.SelectCommand = cmd
Using ds As New DataSet()
Dim dt As New DataTable()
sda.Fill(dt)
Return dt
End Using
End Using
End Using
End Using
End Function
Protected Sub OnRowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
Dim customerId As String = gvCustomers.DataKeys(e.Row.RowIndex).Value.ToString()
Dim gvOrders As GridView = TryCast(e.Row.FindControl("gvOrders"), GridView)
gvOrders.DataSource = GetData(String.Format("select top 3 * from Orders where CustomerId='{0}'", customerId))
gvOrders.DataBind()
For Each row As GridViewRow In gvOrders.Rows
If e.Row.RowType = DataControlRowType.DataRow Then
Dim ddlOrderId As DropDownList = TryCast(row.FindControl("ddlOrderId"), DropDownList)
ddlOrderId.DataSource = GetData(String.Format("select top 3 OrderId, OrderDate from Orders where CustomerId='{0}'", customerId))
ddlOrderId.DataTextField = "OrderId"
ddlOrderId.DataValueField = "OrderDate"
ddlOrderId.DataBind()
End If
Next
End If
End Sub
Screenshot
