retrieve data from gridview row to an asp.net form - asp.net

Question

I would like to retrieve a row from the gridview by clicking on ImageButton (Booking):
here is the code of my grid view:
<asp:GridView ID="GridView1" runat="server" Height="150px" Width="284px"
CssClass="tb" AutoGenerateColumns="False" DataSourceID="SqlDataSource1">
<Columns>
<asp:TemplateField HeaderText=" Booking">
<ItemTemplate>
<asp:ImageButton ID="booking" runat="server" HeaderText="Booking" ImageUrl="booking_icon.ico" PostBackUrl="form.aspx"/>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Trade" HeaderText="Trade" SortExpression="Trade" />
<asp:BoundField DataField="CARRIER" HeaderText="CARRIER"
SortExpression="CARRIER" />
</Columns>
</asp:GridView>
The textbox of the form.aspx page that should be filed from the gridview row:
<asp:TextBox ID="trade" runat="server" CssClass="input , focus"></asp:TextBox>
<asp:TextBox ID="carrier" runat="server" CssClass="input , focus"></asp:TextBox>

Answer 1

Add GridView RowCommand event and command argument for image button where you can pass an id or something to determine the current row.
<asp:GridView onrowcommand="gvRowCommand" ID="GridView1" runat="server" Height="150px" Width="284px"
CssClass="tb" AutoGenerateColumns="False" DataSourceID="SqlDataSource1">
<ItemTemplate>
<asp:ImageButton CommandArgument='<%# Eval("SomeId") %>' ID="booking" runat="server" HeaderText="Booking" ImageUrl="booking_icon.ico" />
</ItemTemplate>
C#
protected void gvRowCommand(object sender, GridViewCommandEventArgs e)
{
var someId = e.CommandArgument;
}
VB.Net
Protected Sub gvRowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles gv.RowCommand
Dim someId As Integer = Convert.ToInt32(e.CommandArgument)
End Sub
You can refer msdn for more : http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowcommand.aspx