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Controlling GridView paging and appearance

From: ASP.NET Essential Training

Video: Controlling GridView paging and appearance

The GridView control implements a number of features that allow you to customize the way your dynamic data is presented on the screen. For this demonstration, I'll use a file from the dynamic data website named AuthorsWithPaging.aspx and then click the Design button at the bottom of the Design View so you can see it's beginning appearance. In the beginning state of the file you will see a GridView. The GridView is displaying seven columns from the server-side authors table. Now to configure its behavior I'll click anywhere on the GridView control. You should see the tab appear above the GridView control indicating the kind of control asp:GridView and its ID GridView1.

Controlling GridView paging and appearance

The GridView control implements a number of features that allow you to customize the way your dynamic data is presented on the screen. For this demonstration, I'll use a file from the dynamic data website named AuthorsWithPaging.aspx and then click the Design button at the bottom of the Design View so you can see it's beginning appearance. In the beginning state of the file you will see a GridView. The GridView is displaying seven columns from the server-side authors table. Now to configure its behavior I'll click anywhere on the GridView control. You should see the tab appear above the GridView control indicating the kind of control asp:GridView and its ID GridView1.

Then at the top right corner of the control you will see an icon with a right pointing arrow. When you click on this icon that opens a set of tasks relating to the control. From there you can configure the control's data source, refresh its schema or the list of columns and data types, edit its columns and enable paging, sorting and other features. I will click on Edit Columns. From this screen you can add and remove columns to the Grid control and you can configure each column. I'll start with au_lname, the author's last name. I'll click on the item in the selected fields list and then take a look at its properties on the right.

If you scroll down to the Data Section of the BoundField properties, you will see the DataField property. This value must match the name of the column as it's known when it's retrieved from the server-side database. That's how the data is displayed in the control, but other values in these properties can be set arbitrarily. The HeaderText is one of these. The HeaderText property determines what the user sees at the top of each column. I'll select the text and type in instead Last Name. This is friendly text, text that the user can read directly. Within this properties list, each time you make a change just press the Tab key and that will save the change to the underlying code.

You will see that the value you type in is also reflected in the selected field's column on the left. Next I'll click on au_fname and I'll set its HeaderText to First Name and press Tab and then I'll go through and do the same thing for each of the other columns. For all the other columns I'm just going to change the first character to an uppercase character, making sure to press the Tab key after each change. If you forget to press the Tab key, in some conditions Visual Web Developer won't save your changes.

After I have changed the HeaderText for all of the columns, I'll click OK and take a look at the display in Design View. You should see that the names of the columns are reflected in Design View now. I'll save my changes with Ctrl+S and then run the page without debugging and you should see that the headers that you selected are displayed correctly. Now we'll close the browser and make sure other changes. With the GridView still selected I'll go back to the Task list and this time I'll choose AutoFormat. The AutoFormat selection allows you to set a number of visual properties all at the same time, with some predefined schemes. You can select Colorful, Classic, Simple and so on.

I will choose the Simple scheme, which reflects a background color in the header with a particular foreground color and then alternating row colors, and then I'll click OK. In Design View you should immediately see the scheme presented. You will see the same list of columns you saw before but now when you start the page in the browser you will see that the alternating row colors are implemented for you automatically. Finally I'll show one other capability of the grid control. I'll once again make sure that I have selected the control and now I'll go over to the Properties View and I'll double click the header of the Properties View to make it a floating panel and I'll drag it out and resize it so I can all of the panels of the GridView.

One of the features of the GridView is Automatic Paging. That is, the ability to show only a certain numbers of records at a time. This is extraordinarily easy to set up. Go to the Paging category in the Properties View and look for the property AllowPaging and set it to a value of True. Then go to the PageSize, which will default to a value of 10, and reduce it to 5. When you type in the value of 5 and then press the Tab key you should see that the Grid View is shrinking down to show only 5 rows in the Design View in the background.

Next click the icon next to PagerSettings. The Pager control is a set of hyperlinks that are generated automatically by the GridView as the user is browsing through the data. By default the pager settings mode is set to Numeric, which results in page numbers being displayed wherever you put the pager. If you change the mode from Numeric to one of the other modes, for example NextPreviousFirstLast, you will see that the numbers are replaced with caret icons or you can also do a combination of these settings, for example using NumericFirstLast. You can also position the pager by selecting the Position property and setting it to values of Bottom Top or TopAndBottom. I'll leave the Position property set at its initial value of Bottom.

Then I'll close the Properties View, I'll press Ctrl+S to save my changes and once again run the page. And the result will be that I see a list of the page numbers displayed below the GridView in the footer region. There are many other configurations that you can use with the GridView control. Explore the documentation and the properties list to see what's available and how you might be able to use this control to display your data.

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This video is part of

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ASP.NET Essential Training

79 video lessons · 49158 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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