system.data.sqlclient.sqlexception类型的未经处理的异常出现在system.data.dll

源代码如下
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;namespace 宾馆客房管理系统
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            if (IsUserIdentify() == true)
            {
                Form2 form1 = new Form2();
                form1.Show();
                this.Visible = false;
            }
            else
            {                MessageBox.Show("用户名或密码错误");
            }        }        private bool IsUserIdentify()
        {            SqlConnection Conn = new SqlConnection("Data Source=.;Initial Catalog=客房管理系统;Integrated Security=True");
         
            Conn.Open();            string sql = "SELECT Name,PassWord FROM Admin WHERE Name='" + this.textBox1.Text + "'and PassWord='" + this.textBox2.Text + "'";
            SqlCommand Cmd = new SqlCommand(sql, Conn);
            SqlDataReader reader = Cmd.ExecuteReader();            if (reader.Read())
            {
                return true;
            }
            else
            {
                return false;
            }
            Conn.Close();
        }        private void label1_Click(object sender, EventArgs e)
        {        }        private void Form1_Load(object sender, EventArgs e)
        {        }
    }
}
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