How to select particular row in a gridview - asp.net

Question

I have a Gridview
<asp:GridView ID="GridView1" runat="server" Width="400px" AutoGenerateColumns="false"
OnSelectedIndexChanged="GridView1_SelectedIndexChanged1">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="name">
<ItemTemplate>
<asp:Label ID="lblStudentName" runat="server" Text='<%# Eval("StudentName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Address">
<ItemTemplate>
<asp:Label ID="lblResidentialAddress" runat="server" Text='<%# Eval("ResidentialAddress") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
and i get the value binded to the gridview
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
DataTable dt = new DataTable();
dt = objdb.GetData("Getsamples", new object[] { });
ViewState["CurrentTable"] = dt;
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
protected void GridView1_SelectedIndexChanged1(object sender, EventArgs e)
{
Response.Write(GridView1.SelectedRow.Cells[0].Text);
// string selectedText = ((Label)GridView1.SelectedRow.FindControl("lblStudentName")).Text;
// Response.Write(selectedText);
}
i cannot able to retrive the row where the checkbox is checked...
How to select particular row in a gridview, and based upon the selection i need to take out the 'Name' and pass this as a parameter to get ,another gridview related to the row which i selected.???
any help...

Answer 1

Try using another event - OnSelectedIndexChanging (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.selectedindexchanging.aspx)
It has GridViewSelectEventArgs (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridviewselecteventargs_members.aspx) passed to the event handler which has NewSelectedIndex property.
Your event handler will look like:
void GridView1_SelectedIndexChanging(Object sender, GridViewSelectEventArgs e)
{
GridViewRow row = GridView1.Rows[e.NewSelectedIndex];
}