从 CreatedUser 事件中取消 CreateUserWizard

Question

我正在使用 CreateUserWizard 和自定义 MembershipProvider 将用户添加到我们的数据库。目前，用户已成功添加到数据库中，我正在使用 CreatedUser 事件来存储表单上捕获的附加信息。这很好用；但是，我希望能够在更新期间处理任何错误情况。

如果更新附加详细信息失败，是否有办法重新显示带有错误的 CreateUserWizard 表单？

这是我在 CreatedUser 事件中的代码：

protected void RegisterUserWizard_CreatedUser(object sender, EventArgs e)
{
    try
    {
        // Try to update the customer table with the additional information
        using (OrderEntities entities = new OrderEntities())
        {
            // Read in all the values from the form
            TextBox custTitle = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerTitle");
            TextBox custName = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerName");
            TextBox custSurname = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerSurname");
            TextBox custAddress1 = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerAddressLine1");
            TextBox custAddress2 = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerAddressLine2");
            TextBox custAddress3 = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerAddressLine3");
            TextBox custCity = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerCity");
            TextBox custCounty = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerCounty");
            TextBox custPostcode = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerPostcode");
            DropDownList custCountry = (DropDownList)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerCountry");

            Customer custInfo = entities.Customers.Where(c => c.UserName == RegisterUserWizard.UserName).FirstOrDefault();

            if (custInfo != null)
            {
                custInfo.Email = RegisterUserWizard.Email;
                custInfo.Password = RegisterUserWizard.Password;
                custInfo.Title = custTitle.Text;
                custInfo.Firstname = custName.Text;
                custInfo.Surname = custSurname.Text;
                custInfo.AddressLine1 = custAddress1.Text;
                custInfo.AddressLine2 = custAddress2.Text;
                custInfo.AddressLine3 = custAddress3.Text;
                custInfo.City = custCity.Text;
                custInfo.County = custCounty.Text;
                custInfo.Postcode = custPostcode.Text;
                custInfo.CountryID = custCountry.SelectedValue;
                custInfo.CreatedDate = DateTime.Now;

                entities.SaveChanges();

                FormsAuthentication.SetAuthCookie(RegisterUserWizard.UserName, false);

                // Redirect user back to calling page
                string continueUrl = RegisterUserWizard.ContinueDestinationPageUrl;
                if (String.IsNullOrEmpty(continueUrl))
                {
                    continueUrl = "~/";
                }
                Response.Redirect(continueUrl);

            }
            else
            {
                // Redisplay CreateUserWizard showing error message
            }
        }
    }
    catch
    {
        // Redisplay CreateUserWizard showing error message
    }
}

在此先感谢

Answer 1

如果您使用内容模板添加 ID 为 ErrorMessage 的文字控件，则可以显示来自 CreateUserWizard 控件的错误。

<asp:Literal runat="server" EnableViewState="false" ID="ErrorMessage"></asp:Literal>

Answer 2

好的，为这个找到了解决方法

一、修改后的 CreatedUser 事件处理函数：

protected void RegisterUserWizard_CreatedUser(object sender, EventArgs e)
{
    try
    {
        // Try to update the customer table with the additional information
        using (OrderEntities entities = new OrderEntities())
        {
            // Read in all the values from the form
            TextBox custTitle = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerTitle");
            TextBox custName = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerName");
            TextBox custSurname = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerSurname");
            TextBox custAddress1 = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerAddressLine1");
            TextBox custAddress2 = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerAddressLine2");
            TextBox custAddress3 = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerAddressLine3");
            TextBox custCity = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerCity");
            TextBox custCounty = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerCounty");
            TextBox custPostcode = (TextBox)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerPostcode");
            DropDownList custCountry = (DropDownList)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomerCountry");

            Customer custInfo = entities.Customers.Where(c => c.UserName == RegisterUserWizard.UserName).FirstOrDefault();

            if (custInfo != null)
            {
                custInfo.Email = RegisterUserWizard.Email;
                custInfo.Password = RegisterUserWizard.Password;
                custInfo.Title = custTitle.Text;
                custInfo.Firstname = custName.Text;
                custInfo.Surname = custSurname.Text;
                custInfo.AddressLine1 = custAddress1.Text;
                custInfo.AddressLine2 = custAddress2.Text;
                custInfo.AddressLine3 = custAddress3.Text;
                custInfo.City = custCity.Text;
                custInfo.County = custCounty.Text;
                custInfo.Postcode = custPostcode.Text;
                custInfo.CountryID = custCountry.SelectedValue;
                custInfo.CreatedDate = DateTime.Now;

                entities.SaveChanges();

                FormsAuthentication.SetAuthCookie(RegisterUserWizard.UserName, false);

                // Redirect user back to calling page
                string continueUrl = RegisterUserWizard.ContinueDestinationPageUrl;
                if (String.IsNullOrEmpty(continueUrl))
                {
                    continueUrl = "~/";
                }
                Response.Redirect(continueUrl);

            }
            else
            {
                // Throw an Exception so that we redisplay CreateUserWizard showing error message
                throw new Exception("An error occurred updating account details, please try again");
            }
        }
    }
    catch (Exception ex)
    {
        // Delete the incomplete user from the membership to avoid duplicate UserName errors if the user tries again
        Membership.DeleteUser(RegisterUserWizard.UserName); 

        // Store the error message in the Context and transfer back to the page preserving the form
        Context.Items.Add("ErrorMessage", ex.Message);
        Server.Transfer(Request.Url.PathAndQuery, true);
    }
}

接下来，我在 ContentTemplate 中添加了一个 CustomValidator，以便我可以显示错误消息：

<asp:CustomValidator ID="CustomValidator" runat="server" ValidationGroup="RegisterUserValidationGroup" />

最后，我为 CreatingUser 事件添加了一个新的处理程序，以从 Context 中读取错误消息并使用 CustomValidator 显示它：

void RegisterUserWizard_CreatingUser(object sender, LoginCancelEventArgs e)
{
    // If we have received an error message in the Context then cancel the CreatingUser and display the message
    if (Context.Items["ErrorMessage"] != null)
    {
        CustomValidator custValidator = (CustomValidator)RegisterUserWizard.CreateUserStep.ContentTemplateContainer.FindControl("CustomValidator");
        custValidator.ErrorMessage = Context.Items["ErrorMessage"].ToString();
        custValidator.IsValid = false;
        e.Cancel = true;
    }
}

现在如果发生错误；我可以显示一条友好的消息，整理 MembershipUser，最重要的是，用户不会在重试之前再次重新输入所有详细信息。