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Attaching external CSS files

From: ASP.NET Essential Training

Video: Attaching external CSS files

The first step in creating a Cascading Style Sheet visual design in an ASP.NET website is to create and attach an external style sheet file. External style sheet files are simple text files that are placed in the Websites Root folder or in a sub-folder of the root. They always have a file extension of .css. The task of actually creating the style sheet file can be done either as pure text or pure coding exercise or it can done using Visual Web Developer tools. I'm going to be working with a website that already has a number of files in it. Go to the Visual Web Developer menu and select File > Open Web Site.

Attaching external CSS files

The first step in creating a Cascading Style Sheet visual design in an ASP.NET website is to create and attach an external style sheet file. External style sheet files are simple text files that are placed in the Websites Root folder or in a sub-folder of the root. They always have a file extension of .css. The task of actually creating the style sheet file can be done either as pure text or pure coding exercise or it can done using Visual Web Developer tools. I'm going to be working with a website that already has a number of files in it. Go to the Visual Web Developer menu and select File > Open Web Site.

Navigate to the VisualDesign folder under Chapter06 VisualDesign and click Open. In this website, there are four primary pages: Default.aspx, which is the homepage of the website, and then three other pages, Authors, Publishers and Titles. There is a server control called Header.ascx, which is used by all four pages, which contains a number of hyperlinks wrapped inside ASP panel components and there is also a beginning style sheet file called styles.css.

The style.css file has selectors for the body, table and anchor elements and a pseudo selector called a:hover that affect anchor tags when the mouse is hovering over them. If you take a look at the Default.aspx, you will see that currently the page doesn't have any links to the style sheet file and if you test the page in the web browser, you will see that the styles in the styles.css file are not being applied right now. You are seeing the default fonts and colors applied by the browser. So here is how you attach the external style sheet file to a page. Go to Default.aspx and look at the page in Design view, then over on the left, click on Manage Styles. You will see when you click the Manage Styles tab that the Manage Styles window slides out from the left. Now because we'll be using styles extensively, click the Pin icon, which will pin the panel open and also adjust the design area, so we can see both at the same time.

Now click the Attach Style Sheet link. From there, look in the Root folder and you will find the file styles.css and click OK. You will see in Design view that the fonts change immediately reflecting the settings in the Style Sheet. Now try browsing the page again in the browser. Select Debug > Start Without Debugging, look at the page in the browser and you will see it has a very different look and feel. The font settings from styles.css have been applied and if you move the cursor over the anchor tags at the top, you will see that the menu reflects the a:hover pseudo selector that was declared in the external style sheet.

If you open the other files, Publishers. aspx, Authors.aspx and Titles.aspx, you will see that this link has already been created in these other pages. So that from this point onward, any changes that you make in the external style sheet file, styles.css, will be applied to all of the pages in the entire website. Once you have created this link, it makes it very easy to create side like design settings that are created and defined in CSS and then used in all pages of the website.

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This video is part of

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ASP.NET Essential Training

79 video lessons · 51275 viewers

David Gassner
Author

 
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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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