Question

我想在文本框中应用验证。如何在窗口电话7中应用电子邮件ID文本框的验证？

Answer 1

 public static bool IsValidEmail(string strIn)
   {
       // Return true if strIn is in valid e-mail format.
       return Regex.IsMatch(strIn, 
              @"^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))" + 
              @"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$"); 
   }



using System;
using System.Text.RegularExpressions;

Answer 2

将您的电子邮件TextBox的InputScope属性更改为EmailNameAddress 并使用此

Match match = new Regex(@"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$").Match(txtEmail.Text);

if (match.Success)
{
     MessageBox.Show("Valid Email");
}    else    MessageBox.Show("Invalid Email");

Answer 3

你可以change the InputScope property of the textbox into EmailNameAddress

Answer 4

//Say the text box's name as txtEmail

    using System;
    using System.Text.RegularExpressions;

    private void txtEmail_Validating(object sender, 
                    System.ComponentModel.CancelEventArgs e)
    {
       string errorMsg;
       if(!ValidEmailAddress(txtEmail.Text, out errorMsg))
       {
          // Cancel the event and select the text to be corrected by the user.
          e.Cancel = true;
          txtEmail.Select(0, txtEmail.Text.Length);

          // Set the ErrorProvider error with the text to display.  
          this.errorProvider1.SetError(txtEmail, errorMsg);
       }
    }

    private void txtEmail_Validated(object sender, System.EventArgs e)
    {
       // If all conditions have been met, clear the ErrorProvider of errors.
       errorProvider1.SetError(txtEmail, "");
    }
    public bool ValidEmailAddress(string emailAddress, out string errorMessage)
    {
       // Confirm that the e-mail address string is not empty. 
       if(emailAddress.Length == 0)
       {
          errorMessage = "e-mail address is required.";
             return false;
       }

 // Confirm that the e-mail address in correct regex format
if (Regex.IsMatch(emailAddress, 
              @"^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))" + 
              @"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$")==false)

       // Confirm that there is an "@" and a "." in the e-mail address, and in the correct order.
       if(emailAddress.IndexOf("@") > -1)
       {
          if(emailAddress.IndexOf(".", emailAddress.IndexOf("@") ) > emailAddress.IndexOf("@") )
          {
             errorMessage = "";
             return true;
          }
       }

       errorMessage = "e-mail address must be valid e-mail address format.\n" +
          "For example 'someone@example.com' ";
          return false;
    }

Answer 5

if（string.IsNullOrEmpty（email））返回false; var regex = new System.Text.RegularExpressions.Regex（@“\ w +（[ - +。'] \ w +） @ \ w +（[ - 。] \ w +）。\ w +（[ - ] \ W +）*“）; return regex.IsMatch（email）＆amp;＆amp; ！email.EndsWith（ “”）;

Answer 6

编写如下的辅助方法：

private bool IsVaildEmail(string email)
    {
        return Regex.IsMatch(email, @"\A(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)\Z");
    }

调用此方法并传递电子邮件ID，如果匹配则返回true，如果不匹配则返回false。简单。

如何在窗口电话7中应用电子邮件ID文本框的验证？

6 个答案: