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'The supplier of these products is "' + '".' Where SupplierID = - display a "view message" in the web browser tag the client-side view to render explanation once Select New Business Rule option and enter the following properties of the new rule. Right-click the Products / Business Rules node. Propertyįilter is null = 'Suppliers' and SupplierID = entire filter expression is embedded in the WHERE clause of SELECT statement created by the application framework at runtime. Select Products / Views / grid1 view node on the Controllers tab in Project Explorer.Įnter the Filter Expression and save the changes. The page has to provide an explanation that the list of products is filtered to avoid any confusion on a part of user. The filtering will only take place if FilterBy=SupplierID is detected in the URL of the Products page. Let’s limit the list of products rendered on the Products page to those that have their SessionID column value equal to the value stored in the session variable. Now the application can make use of the session variable SupplierID and URL variable FilterBy. The Suppliers data controller hierarchy will look as follows Set = 'Products.aspx? FilterBy=Suppliers' Select New Action option.Įnter these property values and click OK to create the new action. Start Project Designer and right-click Suppliers / Actions /ag1 (Grid) node in the Project Explorer on Controllers tab. SQL Business Rules can access both types of variables and manipulate their values.Ĭonsider the the following example that demonstrates creation and use of a session variable in the Northwind sample. There are also the client-side variables that are typically passed as URL arguments when users navigate from one page to another. The variables exist on the server for a duration of the browsing session and expire when user closes a browser or logs out. A session variable is usually initialized when a user signs in or when a certain action is performed. If you do have a real application behind the URL, then one can expect the correct output to be produced.Web applications may maintain a collection of session variables on the server and use the variables when a user navigates between pages.
If no row was selected, the value from the first row in the grid will be passed. The values available for passing include already present URL parameters ( xyz), a field value from the selected row ( orderId), and the value specified by the user in a confirmation controller ( reportHeader). However, if you look at the URL, you will see that the values of fields specified in the business rule have been passed.
The next page will display a server error – no page was created to handle the request. On the list of orders, highlight an order and activate the Report action on the action bar. Append the URL parameter “?xyz=Value” to the current page. String.Format( "~/Pages/OrdersReport.aspx?ReportHeader=", This is the placeholder for method implementation. String parameters_ReportHeader, // comes from confirmation / with a command name that matches "Report" and argument that matches "_blank".
/ This method will execute in any view for an action Public partial class OrdersBusinessRules : M圜ompany.Data.
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Visual Studio will load the project and display the source code file of the business rule. When finished, right-click on Orders / Business Rules / Report, _blank (Code / Execute) - r100 controller node, and press Edit Rule in Visual Studio. On the toolbar, press Generate to create the business rule file. In the Project Explorer, switch to the Controllers tab and press New Controller icon on the toolbar. Make sure that Reporting is enabled for your Northwind sample project. The action handler will obtain several parameters from the following sources The action handler will redirect user to that URL.
The example assumes that there is an external URL that can accept ReportHeader. Let’s consider requesting custom parameters and processing them when producing the output.
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Developers can use external software or write code to produce the output. The built-in Report action allows implementing custom report output created on the server.
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The Implementing a Custom Action tutorial in Getting Started series shows an example of such action. Many action require additional information that must be requested from the user.
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