Determing the row from where the button is selected on grid view asp.net/c#

I have multiple buttons in gridview. How can i determine which particular button on a row has been selected ? How can i capture the row index??

I have used

 protected void crtButton_Click(Object sender, EventArgs e)
    {        
            string componentText;
            GridViewRow row = Grid开发者_如何转开发View1.SelectedRow;
            String componentName = row.Cells[1].text;              
     } 

I have tried to generate buttons in gridview .aspx file through following code

         <asp:TemplateField HeaderText="Add to Cart">
                <ItemTemplate>  <asp:Button ID="crtButton" runat="server" Text="Add to Cart" OnClick="crtButton_Click"/>
                </ItemTemplate>                
         </asp:TemplateField>

but it seems like it is not yielding the result. Can any one please help me.

Thank you in anticipation

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Here's how you can get the row index of the clicked button:

protected void crtButton_Click(Object sender, EventArgs e)
{
    Button clickedButton = (Button)sender;
    GridViewRow row = (GridViewRow)clickedButton.Parent.Parent;
    int rowIndex = row.RowIndex;
}

However, that's not the greatest approach since you have to know the level of the button. The best approach would be to use OnCommand in conjunction with a CommandArgument.

<ItemTemplate>
    <asp:Button ID="crtButton" runat="server" Text="Add to Cart" OnCommand="crtButton_Command" CommandArgument=<%# Eval("ItemID") %> />
</ItemTemplate>

protected void crtButton_Command(Object sender, CommandEventArgs e)
{
    int itemID = Convert.ToInt32(e.CommandArgument);
}

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You can cast the sender to a Button and then look at the attributes of the button:

protected void crtButton_Click(Object sender, EventArgs e)
{
    Button Clicked = sender as Button;