Tailspin Spyworks Guide Lecture 8: Other pages, exception handling, summary_html/css_WEB-ITnose

Part 8: Final Pages, Exception Handling, and Conclusion Other pages, exception handling, summary

By Joe Stagner |July 21, 2010

Print

Tailspin Spyworks demonstrates how extraordinarily simple it is to create powerful, scalable applications for the .NET platform. It shows off how to use the great new features in ASP.NET 4 to build an online store, including shopping, checkout, and administration.

Create powerful, well-structured applications on the .NET platform with Tailspin Spyworks demos How simple. Demonstrates how to use the new features of ASP.NET 4 to create an online store that includes shopping, checkout, and management functions.

This tutorial series details all of the steps taken to build the Tailspin Spyworks sample application. Part 8 adds a contact page, about page, and exception handling. This is the conclusion of the series.

This series of guides explains in detail every step of building a case program. Part 8 adds a contact page, about page and exception handling, and is also a summary of the entire series.

Contact page (send email from Asp.net)

Create a new page named ContactUs.aspx
Create a page named ContactUs.aspx

Using the designer, create the following form taking special note to include the ToolkitScriptManager and the Editor control from the AjaxdControlToolkit. .
Using the Ajax control package to design the following page:

Double click on the "Submit" button to generate a click event handler in the code behind file and implement a method to send the contact information as an email.
Double click on the "Submit" button to generate a click event handler in the code behind file and implement a method to send the contact information as an email. The function of sending email.

protected void ImageButton_Submit_Click(object sender, ImageClickEventArgs e)  {  try     {    MailMessage mMailMessage = new MailMessage();    mMailMessage.From = new MailAddress(HttpUtility.HtmlEncode(TextBoxEmail.Text));    mMailMessage.To.Add(new MailAddress("Your Email Here"));     // mMailMessage.Bcc.Add(new MailAddress(bcc));    // mMailMessage.CC.Add(new MailAddress(cc));   mMailMessage.Subject = "From:" + HttpUtility.HtmlEncode(TextBoxYourName.Text) + "-" +                                     HttpUtility.HtmlEncode(TextBoxSubject.Text);   mMailMessage.Body = HttpUtility.HtmlEncode(EditorEmailMessageBody.Content);    mMailMessage.IsBodyHtml = true;   mMailMessage.Priority = MailPriority.Normal;   SmtpClient mSmtpClient = new SmtpClient();   mSmtpClient.Send(mMailMessage);   LabelMessage.Text = "Thank You - Your Message was sent.";   } catch (Exception exp)   {   throw new Exception("ERROR: Unable to Send Contact - " + exp.Message.ToString(), exp);   }}

This code requires that your web.config file contain an entry in the configuration section that specifies the SMTP server to use for sending mail.
Configuration, set the SMTP server used to send emails in the configuration.

    <system.net>        <mailSettings>            <smtp>                <network                     host="mail..com"                     port="25"                     userName=""                     password="" />            </smtp>        </mailSettings>    </system.net>

About page

Create a page named AboutUs.aspx and add whatever content you like.
Create a page named AboutUs.aspx and add whatever content you like. .

Global exception handling

Lastly, throughout the application we have thrown exceptions and there are unforeseen circumstances that cold also cause unhandled exceptions in our web application.
Unexpected occurrences will occur in the program For exceptions, exception handling needs to be added.

We never want an unhandled exception to be displayed to a web site visitor.
We never want an unhandled exception to be displayed to a web site visitor. Apart from being a terrible user experience unhandled exceptions can also be a security problem.

Apart from being a terrible user experience unhandled exceptions can also be a security problem.

To solve this problem we will implement a global exception handler.

In order to solve this problem, we will implement a global exception handler.

To do this, open the Global.asax file and note the following pre-generated event handler.

Open the Global.asax file and note the following automatically generated code:

Add code to implement the Application_Error handler as follows.
Then add a page named Error.aspx to the solution and add this markup snippet.

On the page of Error.aspx, add the following tags:

void Application_Error(object sender, EventArgs e)     {     // Code that runs when an unhandled error occurs     }

Now in the Page_Load event handler extract the error messages from the Request Object.

Implement the actual error message in the Page_Load event handler.

void Application_Error(object sender, EventArgs e)     {     Exception myEx =  Server.GetLastError();    String RedirectUrlString = "~/Error.aspx?InnerErr=" +            myEx.InnerException.Message.ToString() + "&Err=" + myEx.Message.ToString();     Response.Redirect(RedirectUrlString);     }

Summary

<center>  <div class="ContentHead">ERROR</div><br /><br />  <asp:Label ID="Label_ErrorFrom" runat="server" Text="Label"></asp:Label><br /><br />  <asp:Label ID="Label_ErrorMessage" runat="server" Text="Label"></asp:Label><br /><br /></center>

We've seen that that ASP.NET WebForms makes it easy to create a sophisticated website with database access, membership, AJAX, etc. pretty quickly.

Hopefully this tutorial has given you the tools you need to get started building your own ASP.NET WebForms applications!

Through this guide, you can see how to use ASP.NET to create an application that includes data access, membership mechanism, AJAX and other functions How simple a complex site can be. Hope this guide helps!

protected void Page_Load(object sender, EventArgs e){    Label_ErrorFrom.Text = Request["Err"].ToString();    Label_ErrorMessage.Text = Request["InnerErr"].ToString();}