protected void ImageButton1_Click(object sender, ImageClickEventArgs e) { if (this.DropDownList1.SelectedValue == "教师") { BTeacher bll = new BTeacher(); Teacher t = new Teacher( Convert.ToString(TextBox1.Text), Convert.ToString(TextBox2.Text), Convert.ToString(TextBox3.Text) ); if (Page.IsValid) { bll.InsertTeacher(t); Response.Write("<script>alert('添加成功!');</script>"); } else { Response.Write("<script>alert('添加失败!');</script>"); } } if (this.DropDownList1.SelectedValue == "管理员") { BAdmin bll = new BAdmin(); Admin t = new Admin( Convert.ToString(TextBox1.Text), Convert.ToString(TextBox2.Text), Convert.ToString(TextBox3.Text) ); if (Page.IsValid) { bll.InsertAdmin(t); Response.Write("<script>alert('添加成功!');</script>"); } else { Response.Write("<script>alert('添加失败!');</script>"); } } }