用记登陆判断账号密码是否正确

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace 数据库登陆插入数据
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button_Login_Click(object sender, EventArgs e)
        {
            //获取用户信息
            string UserName = textBox_UserName.Text;
            string UserPassword = textBox_Password.Text;
            string conn = "Data Source=.;Initial Catalog=NIU123;Integrated Security=True";
            using (SqlConnection Scon = new SqlConnection(conn))
            {
            string SqlCom=string.Format("select count(*) from Table_20200625 where UserName='{0}' and UserPassword='{1}'",UserName,UserPassword);

           using(SqlCommand comd =new SqlCommand(SqlCom,Scon))
           {
               Scon.Open();
               int count = (int)comd.ExecuteScalar();
               {
                   if (count > 0)
                   {
                       MessageBox.Show("登陆成功"+count.ToString());
                       Scon.Close();
                   }
                   else
                   {
                       MessageBox.Show("登陆失败");
                          Scon.Close();
                   }
               }

           }
            
            }

        }
    }
}