protected void btnQuery_Click(object sender, EventArgs e) { if (this.txtAreaName.Text.ToString().Trim() == "") { stockDt = stockBll.RealTimeStock(); } else { filter = "AREANAME like '" + this.txtAreaName.Text.ToString().Trim() + "%'"; stockDt = stockBll.Query(filter); } GetDataBind(stockDt); }