Instead, you can use routing to. For example, the URL for a page that displays product categories in an existing. By using routing, you can configure the application to accept the following URL to render the same. Routing has been available starting with ASP.
NET 3. For an example of how to use routing in. NET 4 includes some features that make it easier to use routing, including the following:. The class passes data to the page that the request is routed to. The new properties HttpRequest. RequestContext and Page. RouteData which is a proxy for the. RouteData object. These properties make it easier to access. The following new expression builders, which are defined in.
RouteUrlExpressionBuilder and. NET server control. RouteValue, which provides a simple way to extract information from the RouteContext object.
NET application. Able to pull text. NET doc. The RouteParameter class, which makes it easier to pass data contained in a RouteContext object to. Routing for Web Forms Pages. MapPageRoute "SearchRoute" ,. MapPageRoute "UserRoute" ,. The following example is equivalent to the. Add " SearchRoute ",. The code in the example maps the route to a physical page in the first route, to.
URL and passed to the page. The MapPageRoute method supports the following method overloads:. RouteValueDictionary defaults. The checkPhysicalUrlAccess parameter specifies whether the route should check the security. If the value of checkPhysicalUrlAccess is false,. These permissions are defined in the. In the example configuration, access is denied to the physical page.
When the checkPhysicalUrlAccess parameter is set to true which is its. If checkPhysicalUrlAccess is set to false and. In the code of the Web Forms physical page, you can access the information that routing has extracted.
RouteData wraps. The following example shows how to use Page. Values[ "searchterm" ] as string ;. The code extracts the value that was passed for the.
Consider the following request URL:. When this request is made, the word "scott" would be rendered in the. Accessing Routing Information in Markup. The method described in the previous section shows how to get route data in code in a Web Forms. You can also use expressions in markup that give you access to the same information. For more information, see the. NET 4 includes two new expression builders for Web Forms routing.
The following example shows. Based on the route defined earlier, this markup generates the following URL:. You can also include a route name in the expression, which lets you specify a route to. The following example shows how to use the RouteValue expression. When the page that contains this control runs, the value "scott" is displayed in the label. The RouteValue expression makes it simple to use route data in markup, and it avoids having to work.
The RouteParameter class lets you specify route data as a parameter value for queries in a data source. It works much like the FormParameter class, as shown in the following example:. In this case, the value of the route parameter. Setting Client IDs. NET, namely how controls create.
Knowing the id attribute for rendered elements is. Until ASP. While this has always guaranteed. You can set the ClientIDMode property for any control, including for the page. Possible settings. IDs of parent naming containers. This can be useful in Web user controls.
Because a Web user. Predictable — This option is primarily for use in data controls that use repeating templates. Typically you would use the. Inherit — This setting is the default behavior for controls; it specifies that a control's ID generation is. You can set the ClientIDMode property at the page level. This defines the default ClientIDMode value for. As a result, if you do not set this property anywhere in your code, all controls will.
You set the page-level value in the Page directive, as shown in the following example:. The templates can be rendered individually for a class. Dynamic Data. Dynamic Data was introduced in the. NET Framework 3. This feature provides. PDF Pages. NET class application. A RAD experience for quickly building a data-driven Web site. Automatic validation that is based on constraints defined in the data model.
The ability to easily change the markup that is generated for fields in the GridView and DetailsView. Note For more information, see the Dynamic Data documentation. For ASP. NET 4, Dynamic Data has been enhanced to give developers even more power for quickly. Enabling Dynamic Data for Existing Projects. Dynamic Data features that shipped in the. Field templates — These provide data-type-based templates for data-bound controls.
Field templates. Validation — Dynamic Data lets you use attributes on data classes to specify validation for common. Validation is enforced by the data controls. However, these features had the following requirements:. The only data source controls supported for these features were the EntityDataSource or.
LinqDataSource controls. Entities templates in order to have all the files that were required to support the feature. NET 4 is to enable the new functionality of Dynamic Data. NET application. The following example shows markup for controls that can take advantage. In the code for the page, the following code must be added in order to enable Dynamic Data support for. EnableDynamicData typeof Product ;. When the GridView control is in edit mode, Dynamic Data automatically validates that the data entered.
If it is not, an error message is displayed. This functionality also provides other benefits, such as being able to specify default values for insert. Without Dynamic Data, to implement a default value for a field, you must attach to an event,. The DynamicDataManager control has been enhanced so that you can configure it declaratively, as with.
NET, instead of only in code. The markup for the DynamicDataManager control. This markup enables Dynamic Data behavior for the. DataControls section of the DynamicDataManager control. Entity Templates. Entity templates offer a new way to customize the layout of data without requiring you to create a.
Page templates use the FormView control instead of the DetailsView control, as used in. This gives you more control over the markup that is rendered by Dynamic Data.
The following list shows the new project directory layout that contains entity templates:. By default,. The following. The default templates can be edited to change the look and feel for the entire site. There are templates. New templates can be added based on the name of the data. For example, you can add the. The template might contain the following markup:. The new entity templates are displayed on a page by using the new DynamicEntity control. At run time,. The following markup shows the.
FormView control in the. Notice the. DynamicEntity element in the markup. NET 4 introduces two new built-in field templates,.
EmailAddress objects, the field is displayed as a hyperlink that is created by using the mailto: protocol. When users click the link, it opens the user's e-mail client and creates a skeleton message. Objects typed. The following example shows how fields would be marked. Dynamic Data uses the new routing feature that was added in the. The new DynamicHyperLink control makes it. The following example shows how to use the. DynamicHyperLink control:. Show all products. This markup creates a link that points to the List page for the.
The control automatically uses the default table name that the Dynamic.
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