电子邮件地址输入验证 [英] Email address input validation

问题描述

有没有办法在 wpf C# 中对电子邮件地址进行文本框输入验证?正则表达式或验证表达式或任何可以提供帮助的东西，最好附上代码示例和一些说明

Is there any way to make a textbox input validation for email addresses in wpf C#? Regex or validation expression or anything that can help, best with code sample and some instructions

推荐答案

在 text_changed 事件中，您可以将文本框的值传递给辅助类.

On the text_changed event you could pass the value of the textbox to a helper class.

public static class ValidatorExtensions
{
    public static bool IsValidEmailAddress(this string s)
    {
        Regex regex = new Regex(@"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$");
        return regex.IsMatch(s);
    }
}

现在在文本更改事件上您可以测试输入

Now on the text changed event you can test the input

private void myTextBox_TextChanged(object sender, EventArgs e)
{
   bool result = ValidatorExtensions.IsValidEmailAddress( myTextBox.Text );
}

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