protected void grd_RowCommand(object sender, GridViewCommandEventArgs e) { int rowIndex = Convert.ToInt32(e.CommandArgument.ToString()); string candidateId = this.grd.DataKeys[rowIndex]["ID"].ToString(); if (e.CommandName == "updates") { ListToDataTable lsttodt = new ListToDataTable(); var lst = _service.CandidateListById(Guid.Parse(candidateId)); DataTable dt = lsttodt.ToDataTable(lst); if (dt != null && dt.Rows.Count > 0) { hdnID.Value = dt.Rows[0]["ID"].ToString(); txtRegistrationNumber.Text = dt.Rows[0]["RegistrationNo"].ToString(); txtCandidateName.Text = dt.Rows[0]["CandidateName"].ToString(); txtFatherName.Text = dt.Rows[0]["FatherName"].ToString(); txtMotherName.Text = dt.Rows[0]["MotherName"].ToString(); txtDOBs.Text = dt.Rows[0]["DOB"].ToString(); ddlBatchId.SelectedValue = dt.Rows[0]["BatchID"].ToString(); ddlGender.SelectedValue = dt.Rows[0]["Gender"].ToString(); btnSubmit.Text = "Update"; } else { //do nothing btnSubmit.Text = "Save"; } } else { DataTable dt = new DataTable(); bool result = _service.DeleteCandidate(Guid.Parse(candidateId)); if (result) { bindGrid(); } } }