/// <summary>
/// 判断身份证号码是否已经存在
/// </summary>
/// <param name="studentIdNo"></param>
/// <returns></returns>
public bool IsIdNoExisten(string studentIdNo)
{
string sql = "select count(1) from Students where StudentIdNo='{0}'";
sql = string.Format(sql, studentIdNo);
int count = Convert.ToInt32(SQLHelper.GetSingalResulrt(sql));
//if (count == 1)
//{
// return true;
//}
//else
//{
// return false;
//}
return(count == 1 ? true:false);
}
