ChangePwd.cs

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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 工资管理系统
{
    public partial class ChangePwd : Form
    {
        public int flag;
        public string str;
        public ChangePwd()
        {
            InitializeComponent();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (button2.Text == "输入完毕请点此修改")
            {
                if ((str = this.textBox1.Text.ToString()) != "")
                {

                    if (MessageBox.Show("您确定要修改密码吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)
                    {

                        flag = 1;
                        MessageBox.Show("请按确定按钮，才能修改成功！");
                        return;
                    }
                }

            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (button1.Text == "确定")
            {
                if (flag == 1 && str != "")
                {
                    SqlConnection con = DBCon.createCon();
                    con.Open();
                    SqlCommand cmd = new SqlCommand("update Users set UserPwd ='" + textBox3.Text.ToString() + "'  where UserName='" + str + "'", con);
                    cmd.Connection = con;
                    cmd.ExecuteNonQuery();
                    con.Close();
                    MessageBox.Show("修改成功！");
                    flag = 0;
                }
            }
        }
        private void button3_Click(object sender, EventArgs e)
        {
            if (button3.Text == "取消")
            {
                if (MessageBox.Show("确定退出密码修改吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Asterisk) == DialogResult.OK)
                {