protected void Page_Load(object sender, EventArgs e) { using (connect) { SqlCommand command = new SqlCommand("Select BloodTypeName, BloodTypeID from BloodType", connect); connect.Open(); bloodT.DataTextField = "BloodTypeName"; bloodT.DataValueField = "BloodTypeID"; bloodT.DataSource = command.ExecuteReader(); bloodT.DataBind(); connect.Close(); SqlCommand command1 = new SqlCommand("Select TestName, BloodTestID from BloodTestType", connect); connect.Open(); bloodTest.DataTextField = "TestName"; bloodTest.DataValueField = "BloodTestID"; bloodTest.DataSource = command1.ExecuteReader(); bloodTest.DataBind(); connect.Close(); SqlCommand command2 = new SqlCommand("Select DiagnosisName, DiagnosisID from DiagnosisType", connect); connect.Open(); Diag.DataTextField = "DiagnosisName"; Diag.DataValueField = "DiagnosisID"; Diag.DataSource = command2.ExecuteReader(); Diag.DataBind(); connect.Close(); } }