protected void ddlProcedureCode_SelectedIndexChanged(object sender, EventArgs e) { if (!ddlProcedureCode.SelectedItem.ToString().Equals("--- Select ---")) { lblProcedureDesc.Visible = true; lstProcedureDesc.Visible = true; _reportBO = new Bill_Sys_ReportBO(); DataSet DS = new DataSet(); DS = _reportBO.GetProcedureDesc(txtCompanyID.Text, ddlProcedureCode.SelectedItem.ToString()); lstProcedureDesc.DataSource = DS; lstProcedureDesc.DataTextField = DS.Tables[0].Columns[0].ToString(); lstProcedureDesc.DataValueField = DS.Tables[0].Columns[1].ToString(); lstProcedureDesc.DataBind(); } else { ddlProcedureCode.SelectedIndex = 0; lblProcedureDesc.Visible = false; lstProcedureDesc.Visible = false; } }