using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Dapper;
namespace Hydrogis_API
{
class LoginDB
{
public static ResponseStatus UserLogin(UserInfo userInfo)
{
SqlConnection conn = new SqlConnection("server=xxx.xxx.xx.xxx,8033;database=Hydrology;uid=sa;pwd=123@abcd;");
try
{
conn.Open();
//验证用户名密码
string sql = "select * from Y where YM=@YM";
UserInfo user = conn.Query<UserInfo>(sql).First();
if (user.YMM == userInfo.YMM)
{
return new ResponseStatus() { Code = 1, Desc = "登陆成功" };
}
else
{
return new ResponseStatus() { Code = 0, Desc = "登陆错误,请重新输入用户名以及密码" };
}
}
catch (Exception ex)
{
return new ResponseStatus() { Code = 0, Desc = "数据库错误,登录失败!" };
}
finally
{
conn.Close();
}
}
}
}
就是想弄一个用户验证,然后异常显示@YM是未声明的标量变量,求教该怎么写