C# 如果不正确，则使用正则表达式取消事件

我有一个c形式的正则表达式。我需要确定格式是否正确。如果正确，它将继续保存，但如果正确，它将显示其验证并取消保存事件

验证代码

保存代码

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它声明它的格式不正确，但即使格式不正确，它仍会继续保存事件。

我将它嵌套在函数中，以验证它是否为空。这似乎奏效了

private void emailTxt_Validating(object sender, CancelEventArgs e)
    {

    if (string.IsNullOrWhiteSpace(emailTxt.Text))
    {
        e.Cancel = true;
        errorEmail.SetError(emailTxt, "Email is Empty!");
        CancelBtn.Enabled = true;
    }
    else
    {
        string email = emailTxt.Text;
        Regex regex = new Regex(@"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$");
        Match match = regex.Match(email);

        if (match.Success)
        {
            e.Cancel = false;
        }
        else
        {
            e.Cancel = true;
            errorEmail.SetError(emailTxt, "Incorrect Format Try... email@email.com");
            CancelBtn.Enabled = true;
            return;
        }                                
    }
}

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错误在别处，我们看不到。保存代码是什么？@GiorgiNakeuri我已经用我的保存代码更新了上面的代码。你能显示

validateChildren

method@Valentin以上是所有代码。@DonaldBury，这应该是ValidateChildren方法。你应该展示一下。

private void SaveBtn_Click(object sender, EventArgs e)
        {
            //SQL Connection and SQL for inserting a new admin
            SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0; AttachDbFilename=C:\Users\Donald\Documents\Visual Studio 2013\Projects\DesktopApplication\DesktopApplication\Student_CB.mdf ;Integrated Security=True");
            con.Open();

            if (ValidateChildren(ValidationConstraints.Enabled))
            {
                try
                {
                    string sql = "INSERT INTO Admin (Admin_Username, Admin_FName, Admin_SName, Admin_Email, Admin_Password) " + "VALUES (@adminName, @adminFirstname, @adminSurname, @adminEmail, @adminPassword);";

                    using (var cmd = new SqlCommand(sql, con))
                    {
                        cmd.Parameters.AddWithValue("@adminName", usernameTxt.Text);
                        cmd.Parameters.AddWithValue("@adminFirstname", firstnameTxt.Text);
                        cmd.Parameters.AddWithValue("@adminSurname", surnameTxt.Text);
                        cmd.Parameters.AddWithValue("@adminEmail", emailTxt.Text);
                        cmd.Parameters.AddWithValue("@adminPassword", passwordTxt.Text);
                        cmd.ExecuteNonQuery();
                    }

                    MessageBox.Show("Admin Successfully Added!");

                    this.Close();

                }

                catch (Exception ex)
                {

                    MessageBox.Show(ex.Message);


                }
            }

            con.Close();
        }

private void emailTxt_Validating(object sender, CancelEventArgs e)
    {

    if (string.IsNullOrWhiteSpace(emailTxt.Text))
    {
        e.Cancel = true;
        errorEmail.SetError(emailTxt, "Email is Empty!");
        CancelBtn.Enabled = true;
    }
    else
    {
        string email = emailTxt.Text;
        Regex regex = new Regex(@"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$");
        Match match = regex.Match(email);

        if (match.Success)
        {
            e.Cancel = false;
        }
        else
        {
            e.Cancel = true;
            errorEmail.SetError(emailTxt, "Incorrect Format Try... email@email.com");
            CancelBtn.Enabled = true;
            return;
        }                                
    }
}