Winform中的空密码字符

Null Password Char in Winform(Winform中的空密码字符)
本文介绍了Winform中的空密码字符的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在 c# windows 窗体中有一个 textbox 我在将空值分配给 PasswordChar 时遇到问题.我想要做的是,如果一个 checkbox 被选中,那么 PasswordChar 应该是 null 即应该显示实际的文本,否则 PasswordChar 应该是 *.这是我尝试过的

I have a textbox in a c# windows form i am having problems in assigning a null values to a PasswordChar. What i want to do is that if a checkbox is checked then the PasswordChar should be null i.e the actual text should be displayed else the PasswordChar should be *. This what i have tried

    private void checkBox1_CheckedChanged(object sender, EventArgs e)
    {
        if (!checkBox1.Checked)
        {
            txtPassword.PasswordChar = '*';
        }
        else
        {
            txtPassword.PasswordChar = '';
        }
    }

但是这一行

     txtPassword.PasswordChar = ''; 

正在生成错误.我什至尝试过

is generating an error. I have even tried

     txtPassword.PasswordChar = null;

但我仍然收到错误.

请帮我更正我的代码.

推荐答案

要重置 PasswordChar,请执行此操作 txtPassword.PasswordChar = '';

To reset PassswordChar, do this txtPassword.PasswordChar = '';

为了您的方便:

private void checkBox1_CheckedChanged(object sender, EventArgs e){
   txtPassword.PasswordChar = checkBox1.Checked ? '*' : '';
}

这篇关于Winform中的空密码字符的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持编程学习网!

本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除!

相关文档推荐

DispatcherQueue null when trying to update Ui property in ViewModel(尝试更新ViewModel中的Ui属性时DispatcherQueue为空)
Drawing over all windows on multiple monitors(在多个监视器上绘制所有窗口)
Programmatically show the desktop(以编程方式显示桌面)
c# Generic Setlt;Tgt; implementation to access objects by type(按类型访问对象的C#泛型集实现)
InvalidOperationException When using Context Injection in ASP.Net Core(在ASP.NET核心中使用上下文注入时发生InvalidOperationException)
LINQ many-to-many relationship, how to write a correct WHERE clause?(LINQ多对多关系,如何写一个正确的WHERE子句?)