asp.net 自定义验证器未针对文本框触发

一篇关于ASP.NET自定义验证器未针对文本框触发的文章，并添加案例代码。文章分为以下几个段落：

csharp
protected void cvEmail_ServerValidate(object source, ServerValidateEventArgs args)
{
    string email = args.Value;
    // 自定义验证逻辑
    if (!Regex.IsMatch(email, @"^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$"))
    {
        args.IsValid = false;
    }
    else
    {
        args.IsValid = true;
    }
}

csharp
protected void cvEmail_ServerValidate(object source, ServerValidateEventArgs args)
{
    string email = args.Value;
    // 自定义验证逻辑
    if (!Regex.IsMatch(email, @"^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$"))
    {
        args.IsValid = false;
    }
    else
    {
        args.IsValid = true;
    }
    // 额外的逻辑，确保文本框控件的验证
    if (args.IsValid)
    {
        Control control = source as Control;
        if (control != null)
        {
            TextBox textBox = control.FindControl(control.ControlToValidate) as TextBox;
            if (textBox != null)
            {
                textBox.Validate();
                args.IsValid = textBox.IsValid;
            }
        }
    }
}