关于DropDownList的数据验证的问题~~~~
if(DropSchool.SelectedItem.Value)///这儿的SelectedItem.Value不对应该是什么?
{
SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["connString"]);
string strSQL = "SELECT StudentNo,TrueName,Politics,PhoneNo";
strSQL += "FROM User_Info_T WHERE (Politics LIKE '%"+DropSchool.SelectedItem.Value+"%')";然后是这儿~~~怎么验证~~~???