MemberManagement/FrmLogin.cs

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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;

namespace MemberManagement
{
    public partial class FrmLogin : Form
    {
        private member Member;

        public FrmLogin()
        {
            InitializeComponent();
        }

        private void FrmRecharge_Load(object sender, EventArgs e)
        {

        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            ((Button)sender).Enabled = false;
            if (this.Login())
            {
                this.Hide();
                new FrmMain().Show();
            }
            else
            {
                MessageBox.Show("密码错误", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                this.txtPwd.Text = "";
                this.txtPwd.Focus();
            }
            ((Button)sender).Enabled = true;
        }

        private bool Login()
        {
            try
            {
                using (var db = new MemberManagementEntities())
                {
                    var param = db.parameter.FirstOrDefault(o => o.paramName == "password" && o.paramValue == this.txtPwd.Text);
                    return (param != null);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "操作数据失败", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return false;
            }
            return true;
        }