电影记录管理系统3[密码修改]

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Configuration;

using System.Data.SqlClient;

namespace 电影记录管理系统

{

public partial class FrmPwdChange : Form

{

public FrmPwdChange()

{

InitializeComponent();

}

//连接字符串 获取文件里的连接路径

static string connStr = ConfigurationManager.ConnectionStrings["str"].ConnectionString;

private void FrmPwdChange_Load(object sender, EventArgs e)

{

//获取变量uid

string currentUser = Form2.Uid;

//把获取的字符串赋给用户名文本框

txtUsername.Text = currentUser;

}

private void btnOk_Click(object sender, EventArgs e)

{

//连接字符串

SqlConnection conn = new SqlConnection();

//获取当前密码

string sql = "select MUserPwd from MovieAccount where MUserName ='" + txtUsername.Text + "'";

//创建一个cmd对象

SqlCommand cmd = new SqlCommand(sql,conn);

//打开conn连接

conn.Open();

//读取sql数据，获取读到的数据

SqlDataReader sdr = cmd.ExecuteReader();

if (sdr.Read())//如果读到了数据，继续进行

{

string oldPwd = sdr.GetString(0).Trim();

//如果用户输入的密码等于旧密码

if (oldPwd == txtOldPwd.Text)

{

if (txtNewPwd.Text.Trim() == "" || txtNewPwdConfirm.Text.Trim() == "")

{

//如果新密码为空，则弹出提示

MessageBox.Show("新密码不能为空！");

return;

}

else if (txtNewPwd.Text.Trim() != txtNewPwd.Text.Trim())

{

//两次新密码不一样，弹出提示

MessageBox.Show("你输入的密码两次不一样，请重新输入！");

//a清空文本框

txtNewPwd.Text = "";

txtNewPwdConfirm.Text = "";

return;

}

else

{

sdr.Close();

string sqlUpdate = "update MovieAccount set MUserPwd ='" + txtNewPwdConfirm.Text +

"' where MUserName ='" + txtUsername.Text + "'";

SqlCommand cmdUp = new SqlCommand();

if (cmdUp.ExecuteNonQuery() == 0)

{

MessageBox.Show("未知错误！");

return;

}

else

{

MessageBox.Show("恭喜你，密码修改成功！");

}

}

}

else

{

MessageBox.Show("旧密码错误");

//清空文本框

txtNewPwd.Text = "";

txtOldPwd.Text = "";

return;

}

}

else

{

MessageBox.Show("用户名不存在，请重新输入！");

txtOldPwd.Text = "";

txtUsername.Text = "";

txtNewPwd.Text = "";

txtNewPwdConfirm.Text = "";

return;

}

//关闭数据库

conn.Close();

}

private void btnBack_Click(object sender, EventArgs e)

{

//返回主窗体

//new一个main窗体

FrmMain main = new FrmMain();

//出现密码修改主窗体

main.Show();

//隐藏当前的窗口

this.Hide();

}

}

}