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ASP.NET Essential Training
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Presenting data with the GridView control


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ASP.NET Essential Training

with David Gassner

Video: Presenting data with the GridView control

One of the primary reasons organizations use ASP.NET or other application servers like ColdFusion to host their websites is to allow integration with dynamic data stored in a server-side database. In the videos in this chapter, I'll describe how to use various ASP.NET server controls including the GridView and others that know how to bind to the server-side data and display that data in dynamically generated HTML. For all of the videos and demonstrations in this chapter, I'll be using a database hosted by SQL Server. In a previous chapter of the video series, I described how to install SQL Server and how to import the database that I'll be using.
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  1. 18m 44s
    1. Welcome
      1m 42s
    2. Prerequisites
      2m 21s
    3. Using the exercise files
      1m 32s
    4. Upgrading exercise file websites for ASP.NET 4.5 (NEW)
      2m 40s
    5. What's new in ASP.NET 4 (NEW)
      3m 48s
    6. What's new in ASP.NET 4.5 (NEW)
      3m 23s
    7. What's new in this course update (NEW)
      3m 18s
  2. 33m 34s
    1. Understanding how ASP.NET works
      5m 52s
    2. Installing Microsoft Visual Web Developer 2008
      3m 43s
    3. Installing Visual Studio Express 2012 for web (NEW)
      2m 12s
    4. Hello World: Creating your first ASP.NET web site
      4m 28s
    5. Creating pages with dynamic output
      7m 39s
    6. Understanding the development web server
      4m 49s
    7. Exploring the development environment
      4m 51s
  3. 40m 2s
    1. Understanding Microsoft SQL Server
      5m 47s
    2. Installing SQL Server Express
      6m 51s
    3. Exploring SQL Server Management Studio Basic
      4m 23s
    4. Creating a new database
      8m 51s
    5. Connecting to the database in ASP.NET
      5m 35s
    6. Testing SQL queries
      3m 53s
    7. Presenting a dataset in an ASP.NET page
      4m 42s
  4. 25m 31s
    1. Understanding ASP.NET web form pages
      5m 51s
    2. Separating presentation and logic with code files
      4m 17s
    3. Adding web form controls to a page
      5m 25s
    4. Handling postback data in a web form page
      5m 50s
    5. Using data binding expressions
      4m 8s
  5. 48m 37s
    1. Creating a testing environment
      4m 40s
    2. Declaring and using a simple variable
      6m 14s
    3. Declaring and using a complex object
      6m 16s
    4. Using loops
      6m 52s
    5. Using functions
      9m 25s
    6. Using trace statements
      4m 47s
    7. Debugging with breakpoints
      5m 45s
    8. Commenting code
      4m 38s
  6. 17m 43s
    1. Creating web controls
      5m 53s
    2. Registering a user control on a web form page
      3m 25s
    3. Registering controls globally in the web.config file
      3m 53s
    4. Adding public properties to a web control
      4m 32s
  7. 19m 7s
    1. Understanding Cascading Style Sheets (CSS)
      5m 36s
    2. Attaching external CSS files
      3m 12s
    3. Defining a CSS selector
      6m 10s
    4. Using CSS class selectors in server controls
      4m 9s
  8. 30m 34s
    1. Presenting data with the GridView control
      5m 49s
    2. Controlling GridView paging and appearance
      5m 46s
    3. Editing data with the GridView control
      6m 57s
    4. Presenting data with the DataList control
      5m 42s
    5. Formatting data with binding expressions
      6m 20s
  9. 36m 46s
    1. Using the DetailsView control
      7m 33s
    2. Inserting data with the DetailsView control
      6m 36s
    3. Redirecting page requests
      9m 39s
    4. Creating an update page
      6m 20s
    5. Linking to update pages from the list page
      4m 3s
    6. Deleting database records
      2m 35s
  10. 22m 15s
    1. Customizing forms with item editing templates
      6m 7s
    2. Adding validator controls to a form
      6m 40s
    3. Controlling the validation error message display
      6m 24s
    4. Using the ValidationSummary control
      3m 4s
  11. 29m 49s
    1. Creating a query with joined tables
      8m 6s
    2. Replacing control style properties with CSS
      5m 50s
    3. Creating a CSS file for printing
      3m 14s
    4. Suppressing elements in printed web pages
      5m 47s
    5. Selecting data for a report
      6m 52s
  12. 11m 14s
    1. Understanding ViewState and managing postbacks
      4m 36s
    2. Using session variables
      6m 38s
  13. 20m 57s
    1. Turning on forms authentication
      1m 51s
    2. Creating a page to log in users
      4m 18s
    3. Creating a page to set up new users
      4m 6s
    4. Understanding the security database
      3m 27s
    5. Configuring security in the web.config file
      2m 59s
    6. Creating a page to log out users
      4m 16s
  14. 27m 56s
    1. Installing IIS on Windows XP
      6m 32s
    2. Installing ASP.NET 3.5 on Windows XP
      1m 39s
    3. Deploying a site on Windows XP
      5m 9s
    4. Installing Information Internet Services (IIS) on Windows Vista, Windows 7, and Windows 8
      1m 56s
    5. Configuring ASP.NET 3.5 on Windows Vista
      2m 15s
    6. Deploying an application on Windows Vista
      3m 29s
    7. Scripting a database for deployment
      3m 36s
    8. Exporting database scripts in SQL Server Management Studio 2012 (NEW)
      3m 20s
  15. 2m 0s
    1. Where to go from here
      2m 0s

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ASP.NET Essential Training
6h 24m Beginner Apr 28, 2009 Updated Feb 13, 2013

Viewers: in countries Watching now:

Thousands of businesses have used Microsoft ASP.NET to build professional, dynamic websites. In this course, web developer David Gassner demonstrates the tools needed to build and deploy a dynamic site using ASP.NET 3.5 or 4.5. Covering everything from installing and configuring Visual Web Developer 2008 or Visual Studio Express 2012 for Web and SQL Server Express to creating web form pages, this course is designed to give beginning and intermediate developers hands-on experience.

Topics include:
  • Storing data with SQL Server
  • Using the GridView control to present and edit dynamic data
  • Creating a data entry system
  • Attaching external CSS files
  • Creating pages to log in and authenticate visitors
  • Installing Internet Information Services (IIS) on Windows XP and Windows Vista
  • Deploying an ASP.NET website on IIS
Subjects:
Developer Web Servers Programming Languages Web Development
Software:
ASP.NET
Author:
David Gassner

Presenting data with the GridView control

One of the primary reasons organizations use ASP.NET or other application servers like ColdFusion to host their websites is to allow integration with dynamic data stored in a server-side database. In the videos in this chapter, I'll describe how to use various ASP.NET server controls including the GridView and others that know how to bind to the server-side data and display that data in dynamically generated HTML. For all of the videos and demonstrations in this chapter, I'll be using a database hosted by SQL Server. In a previous chapter of the video series, I described how to install SQL Server and how to import the database that I'll be using.

If you haven't gone through that chapter first and you are following along on your own system, you will want to go back to that chapter, walk through the installation and configuration process and make sure that you have set up the Bookstore database. If you are not sure whether you have done those steps, go into Visual Web Developer to the Database Explorer panel. In the Default Window Setup, you can find the Database Explorer panel in the tabbed region on the right, and then make sure that you have a connection to a database called mybookstore. The name of the connection will differ depending on the name of your computer.

Mine is named davidmbpro, but the name of the database and the name of the connection other than that should look the same. And also make sure that you can see the list of Tables. You should see tables named authors, publishers, titles and users, and again if you can't see that, make sure you have gone back to the previous chapter and walk through those exercises. If you are seeing the data correctly, then you are ready to open up the website. Go to the menu and select File > Open Web Site. Choose the folder DynamicData under Ch07DynamicData and click Open. The Solution Explorer panel should open immediately. Then open the file Default.aspx and run the file in the browser by selecting Debug > Start Without Debugging or pressing Ctrl+F5.

So this is what the page looks like initially and if you click on each of the links, you will see that each of the pages has an item that says what will be shown eventually. Now close the page and return to Visual Web Developer. Close the file Default.aspx and then open the file Authors.aspx and look at the page in Design View by clicking the Design button under the Design region. In this demonstration, I'm going to add a GridView control that displays dynamic data from the authors table in the server-side database. I'll place the cursor in the paragraph after the text, this page will show a list of authors and I'll press Enter to create a new paragraph. Then I'll go back to the Database Explorer panel, I'll locate the authors table and I'll drag the authors table into the paragraph, making sure to drop it in the rectangular region shown on the screen. It takes just a few moments to display the GridView.

Now I'm going to move the cursor over the handle on the right border of the GridView and I'll click and drag it out, so it's a bit wider. Then I'll go to the paragraph above, I'll click the header that has the name of the tag P and that selects the entire paragraph and then I'll press Delete to delete that content. I will save my changes by pressing Ctrl+ S, I'll go to the menu and select Debug > Start Without Debugging and you will see when the page is displayed, I'm retrieving and displaying the data in the GridView. So that's the basics of how you get data from the database server to the page.

Now let's look at the code that was generated. Go to Source View and then select View > Full Screen or press Shift +Alt+Enter and take a look at the code that was generated when I dragged and dropped. Within the Paragraph tag you will first see the GridView Control. Critical pieces that you must see are first of all runat = "server". This guarantees that it's treated as a server-side control. And then a number of other settings such as AutoGenerateColumns, DataKeyNames and so on. There is a Columns element in the middle each with something called asp:BoundField. Each instance of the asp:BoundField control declares a particular column that will be displayed in the GridView.

Below the GridView you will see the SqlDataSource, this is how you define the actual connection and I'm going to modify the data source, in particular the Select command. Notice that the Select command, which is shown right here, starts with SELECT [au_id] and so on. I am going to scroll sideways to the end. I'll click right after the end of the SQL statement but within the quotes, and I'll add an Order By clause and then in brackets I'll add au_lname and then a closing bracket. You will notice in the generated code that all columns are wrapped in these bracket characters.

SQL does not require them but in a condition where a name of the column matches a reserved SQL word, the brackets ensure that this phrase is treated as the column or the table name. Now I'll save the changes and I'll run the page again and you will see that this time the authors are displayed in alphabetical order by last name. Finally, I'll remove one column, you will see that the au_id is shown on the left and because that's a primary key column you don't want to display it.

So I'll close the browser and return to the code and then I'll scroll back up the GridView and I'll remove au_id from the list of columns. I'll select just that BoundField and press Delete. I'll save with Ctrl+S and run the page without debugging again. And now I'll see just the columns. Now in others videos in the chapter, I'll show you how to affect the appearance of the GridView and also how to modify the header text that appears at the top of each column.

Find answers to the most frequently asked questions about ASP.NET Essential Training.


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Q: When trying to create a new database, after pasting the text into the SQL Management Suite and executing the query, the database is not created and the following message appears: 

Database 'mybookstore' does not exist. Make sure that the name is entered correctly

What is causing this error?
A: The database must be explicitly created before the script is run. Start by right-clicking on the Databases item in the left panel, then follow the prompts to create the database. Then retry the query.
Q: I am running into problems installing the latest version of ASP.NET. Has the installation procedure changed since this tutorial was recorded?
A: The installation process for the newest version of ASP.NET and its associated tools is a little different than in ASP.NET 3.5, which was used to record this course. You can download Microsoft Web Platform Installer 2.0 from:
<a href="http://www.microsoft.com/web/downloads/platform.aspx" target="blank">http://www.microsoft.com/web/downloads/platform.aspx</a>
Microsoft Web Platform Installer 2.0 includes everything you need:
ASP.NET 4?
Visual Web Developer 2010?
SQL Server Express
You must have one of the following operating systems:
Windows 7?
Windows Vista?
Windows Vista SP1?
Windows XP SP2+?
Windows Server 2003 SP1+?
Windows Server 2008?
Windows Server 2008 R2
You must have administrator privileges on your computer to run the Web Platform Installer.
Q: This course was updated on 2/13/2013. What changed?
A: Since this course was recorded, Microsoft has released both ASP.NET 4.5, the latest version of the server-side web application server, and Visual Studio Express 2012 for Web (the successor product to Visual Web Developer). Both have been adapted to work on Windows 8. There will be some visual changes and some functional changes, but most of the server-side code shown in the course is the same. This update provides a map for those working with the latest software so they can navigate their way through the course.

In particular, we added <em>What's new</em> movies for both ASP.NET 4 and 4.5, a movie explaining the significance of the update, a movie on installing SQL Server Express 2012, and one on exporting database scripts in SQL Server Management Studio 2012, as well as updates to visuals throughout the course.
Q: In the chapter on user authentication, an authentication error results when I try to use the Login component or register a new user. How do I fix this?
A: This is a known error that can occur when using the original release of Visual Studio 2012 Express for Web. Update your copy of Visual Studio for Web to at least maintenance release 1, and then try the exercise again.
 
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