Grid view edit or delete option on click

protected void Page_Load(object sender, EventArgs e)
    {
        conn = new SqlConnection("Data Source=DEEPAK-PC\\SQLEXPRESS;Initial Catalog=NewCrackers;uid=sa;pwd=sasa;");
        if (!IsPostBack)
        {
            bind();
        }
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        bind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        bind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
        Label lbl = (Label)row.FindControl("lblid");
        TextBox textname = (TextBox)row.FindControl("textbox1");
        TextBox textmarks = (TextBox)row.FindControl("textbox2");

        GridView1.EditIndex = -1;
        conn.Open();
        SqlCommand cmd = new SqlCommand("update  emp set marks=" + textmarks.Text + " , name='" + textname.Text + "' where rowid=" + lbl.Text + "", conn);
        cmd.ExecuteNonQuery();
        conn.Close();
        bind();
    }
    public void bind()
    {
        conn.Open();
        SqlDataAdapter da = new SqlDataAdapter("select * from emp", conn);
        DataSet ds = new DataSet();
        da.Fill(ds, "emp");
        GridView1.DataSource = ds.Tables[0];
        GridView1.DataBind();
        conn.Close();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
 GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
 Label lbldeleteID = (Label)row.FindControl("lblid");
 conn.Open();
 SqlCommand cmd = new SqlCommand("delete  emp where rowid=" + lbldeleteID.Text + "", conn);
 cmd.ExecuteNonQuery();
conn.Close();
bind();
}
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        bind();
    }