![](/img/trans.png)
[英]how to Terminate program if user inputs invalid username and password several times
[英]How to show password recovery form after user enters invalid credentials three times
嗨,evryone可以帮我吗..我在使用Visual Studio Community 2015的 Windows窗体应用程序上有一个代码,我有一个textBox ,名称是用户名 ,另一个是密码 ,最后一个是登录,如果用户要登录,它将在这里得到一个tree times错误,我想要它自动显示忘记密码的问题,以及如果用户在登录表单时是tree times错误,该如何恢复密码。 在我进入数据库表格之前,我不知道您能不能帮助您并解释如何做。
这是我的代码
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 SQLSERVER_VISUALSTUDIO_COMMUNITY
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
txt_Password.PasswordChar = '*';
}
private void txt_login_Click(object sender, EventArgs e)
{
if (txt_USername.Text == "" && txt_Password.Text == "")
{
MessageBox.Show("Please enter your password and user_name");
txt_USername.Clear();
txt_Password.Clear();
}
else if (txt_USername.Text == "jondygonzales" && txt_Password.Text == "sharkwebcaster")
{
MessageBox.Show("successfully log_in");
Form1 f = new Form1();
f.Show();
Form2 main = new Form2();
main.Show();
this.Hide();
}
}
}
}
您需要做的是保持一个计数器,当用户名和密码无效时,计数器将增加一。
您检查此变量值,当它达到3时,将向用户显示密码恢复表单。
public partial class Form1 : Form
{
int loginAttemps = 0;
public Form1()
{
InitializeComponent();
txt_Password.PasswordChar = '*';
}
private void txt_login_Click(object sender, EventArgs e)
{
if (txt_USername.Text == "" && txt_Password.Text == "")
{
MessageBox.Show("Please enter your password and user_name");
txt_USername.Clear();
txt_Password.Clear();
}
else if (txt_USername.Text == "jondygonzales" && txt_Password.Text == "sharkwebcaster")
{
loginAttempts = 0;
MessageBox.Show("successfully log_in");
Form1 f = new Form1();
f.Show();
Form2 main = new Form2();
main.Show();
this.Hide();
}
else
{
loginAttempts += 1;
if(loginAttemps == 3)
{
RecoveryForm recForm = new RecoveryForm(); // You need to use correct Form here.
recForm.Show();
this.Hide();
}
}
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.