Question

How can I delete, edit and add rows in a gridview with 3 buttons out of it for deleting, editing and adding rows in C# asp.net and refresh grid after changing?
I don’t want to use the command buttons of the gridview that is repeated in every row.

Answer 1

You need to select the row some how in order for the code to know which row to delete or edit. Then you can grab the the content of that row on GridView1_SelectionChanged in order to delete or update it.

Edit:
Here is what to do:
1. Drag a gridview and a textbox to page.
2. Populate gridview
3. Override Render

protected override void Render(System.Web.UI.HtmlTextWriter writer)
    {
        foreach (GridViewRow row in GridView1.Rows)
        {
            if (row.RowType == DataControlRowType.DataRow)
            {
                row.Attributes["onclick"] =ClientScript.GetPostBackClientHyperlink(GridView1,
            "Select$" + row.DataItemIndex, true);
            }
        }
        base.Render(writer); 
    }

4) In GridView1_SelectedIndexChanged event

//retrieve the id for selected row
int id=int.Parse(GridView1.SelectedDataKey.Value.ToString());
GridViewRow row = GridView1.SelectedRow;
TextBox1.Text = row.Cells[0].Text;

Now you can easily customize this simple example up to your taste.

Edit 2:
Specify the Id as DataKeyName in gridview

 <asp:GridView ID="GridView1" runat="server" DataKeyNames="id"
                onselectedindexchanged="GridView1_SelectedIndexChanged">

Check the updated GridView1_SelectedIndexChanged to see how to retrieve the id for selected row.