Question

我尝试将数据与数据库匹配，并使用dataadapter填充我的数据表。如果匹配，请使用dataadapter填充数据表。如果不匹配，请显示消息。但我的用户名和密码与数据库匹配，它仍然显示msg。在调试模式下，用户名和密码都是通过但不填写数据表。

using (OracleConnection conn = new OracleConnection())
{
    conn.ConnectionString = connStr;
    conn.Open();

    string sql = @"select user_id, password, status, role_id, email, contact_no, 
                   last_login_date, created_by, last_update_date, last_update_by
                   from users where user_id = :userID and password = :pwd";

    using (OracleCommand cmd = new OracleCommand())
    {
       cmd.Connection = conn;
       cmd.CommandText = sql;

       cmd.Parameters.Add("userID", OracleType.VarChar).Value = userID;

       cmd.Parameters.Add("pwd", OracleType.VarChar).Value = pwd;

       DataTable dt = new DataTable();
       OracleDataAdapter adapter = new OracleDataAdapter(cmd);
       adapter.Fill(dt);

       if (dt.Rows.Count <= 0)
       {
           msg = "Invalid Login ID or Password";
       }

       return dt;
    }
}

dt.Rows.Count为0.但是我检查了用户名和密码与数据库完全相同。

Answer 1

SQL：

create procedure sp_authenticate
(
    @userId varchar(50),
    @pass varchar(50)
)
as
begin
    select user_id, password, status, role_id, email, contact_no, 
    last_login_date, created_by, last_update_date, last_update_by
    from users where user_id = @userid and password = @pass
end

C＃代码：

using (OracaleConnection con=new OracaleConnection())
{
    conn.ConnectionString = connStr;
    conn.Open();

    using (OracleCommand cmd = new OracleCommand())
    {
        cmd.Connection = conn;
        cmd.CommandText = "sp_authenticate";  //name of your procedure
        cmd.CommandType = CommandType.StoredProcedure;

        cmd.Parameters.Add("@userid", OracleType.VarChar,50).value=userID;
        cmd.Parameters.Add("@password", OracleType.VarChar,50).value=pwd;

        DataTable dt = new DataTable();
        OracleDataAdapter adapter = new OracleDataAdapter(cmd);
        adapter.Fill(dt);

        if (dt.Rows.Count <= 0)
        {
            msg = "Invalid Login ID or Password"; }
        }

        return dt;
   }

无法使用数据适配器填充数据表

1 个答案: