protected void DropDownCourse_SelectedIndexChanged(object sender, EventArgs e) { if (DropDownSubject.SelectedValue != "--Select--") { panelsubject.Visible = true; string selectcmd = "Select Sname from Subjects where Cid =(Select Cid from Course where Cname='" + DropDownCourse.SelectedValue + "')"; SqlDataAdapter daa1 = new SqlDataAdapter(selectcmd, con); DataSet myDataSet = new DataSet(); daa1.Fill(myDataSet, "Subjects"); DropDownSubject.DataSource = myDataSet; DropDownSubject.DataBind(); DropDownSubject.DataTextField = "Sname"; DropDownSubject.DataValueField = "Sname"; DropDownSubject.DataBind(); } }
protected void DropDownCourse_SelectedIndexChanged(object sender, EventArgs e) { if (Session["Tid"] == null) { Response.Redirect("Tutorlogin.aspx"); } string tid = Session["Tid"].ToString(); if (DropDownSubject.SelectedValue != "--Select--") { panelsubject.Visible = true; string selectcmd = "Select Sname From Subjects where Sbid IN (Select Sbid from TutorSubjects where Cid IN(Select Cid from Course where Cname='" + DropDownCourse.SelectedValue + "') and sbid IN (Select Sbid from TutorSubjects where Tid='" + tid + "') and Tid = '" + tid + "') "; SqlDataAdapter daa1 = new SqlDataAdapter(selectcmd, con); DataSet myDataSet = new DataSet(); daa1.Fill(myDataSet, "Subjects"); DropDownSubject.DataSource = myDataSet; DropDownSubject.DataBind(); DropDownSubject.DataTextField = "Sname"; DropDownSubject.DataValueField = "Sname"; DropDownSubject.DataBind(); DropDownSubject.Items.Insert(0, "--Select--"); } }