1 public string Admin(string Name,string Pwd)
2 {
3 Admin admin = new Admin();
4 admin.Name = Name;
5 admin.Pwd = Pwd;
6 string CheckAdmin = "select qx from admin where Name='" +Name + "'and Pwd='" + Pwd + "'";
7 string returndate="";
8 SqlConnection conn = new SqlConnection("Server=(local);database=vote;uid=sa;pwd=123456;");
9 try
10 {
11 conn.Open();
12 SqlCommand cmd = new SqlCommand(CheckAdmin, conn);
13 if (cmd.ExecuteScalar() is DBNull)
14 {
15 return returndate = "用户名存在";
16 }
17 else
18
19 return returndate = "用户名不存在";
20
21 }
22 catch (SqlException ee)
23 {
24
25 return ee.Message.ToString();
26 }
27
28
29
30
31 }
