Blog: Posts from July, 2012

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Posts from July, 2012
Wednesday, July 25, 2012PrintSubscribe
Data Action Notifications

Notifications can be displayed as confirmations after any data manipulation operations.

Let’s implement a code business rule to display a notification after every Update, Insert, and Delete action.

Enable shared business rules. Generate the web app.

Start the Project Designer. On the toolbar, press Develop to open the project in Visual Studio.

In the Solution Explorer, double-click on ~\App_Code\Rules\SharedBusinessRules.cs(vb).

Replace the existing code with the following:


using System;
using System.Data;
using System.Collections.Generic;
using System.Linq;
using MyCompany.Data;

namespace MyCompany.Rules
    public partial class SharedBusinessRules : MyCompany.Data.BusinessRules
        protected override void AfterSqlAction(ActionArgs args, ActionResult result)
            base.AfterSqlAction(args, result);
            if (result.Errors.Count == 0 && args.CommandName == "Update" ||
                args.CommandName == "Insert" || args.CommandName == "Delete")
                Result.ShowAlert("The action {0} has been completed.", args.CommandName);

Visual Basic:

Imports MyCompany.Data
Imports System
Imports System.Collections.Generic
Imports System.Data
Imports System.Linq

Namespace MyCompany.Rules

    Partial Public Class SharedBusinessRules
        Inherits MyCompany.Data.BusinessRules

        Protected Overrides Sub AfterSqlAction(args As ActionArgs, result As ActionResult)
            If (result.Errors.Count = 0 And Arguments.CommandName = "Update" Or
                Arguments.CommandName = "Insert" Or Arguments.CommandName = "Delete") Then
                result.ShowAlert("The action {0} has been completed.", Arguments.CommandName)
            End If
        End Sub

    End Class
End Namespace

Save the file. Press Ctrl+F5 to run the web application from Visual Studio.

Navigate to any page, edit a record, and save. A popup window will open, displaying a notification.

Data Action Notification displayed in a popup window.

Wednesday, July 25, 2012PrintSubscribe
Working with Business Rules in Designer

The framework of a generated application can be extended with custom business rules to handle client- and server-side events. The events are typically raised in response to user interface actions. There are several types of business rules:

JavaScript business rules are executed by the client web browser. All other types of business rules are executed on the server. Business rules have uniform access to field values and application framework facilities. The application framework orchestrates execution of business rules, which allows the developer to implement business logic that is not bound to user interface elements.

Business rules can be found in the Project Browser by clicking on the Rules tab when a controller is selected.

Rules tab for a controller in the Project Browser.

A new business rule can be created by using the New | New Rule action on the action bar.

New Rule action on the action bar.

A business rule can be edited by using the context menu action Open.

Open context menu option in the Project Browser.     Business rule edit form in the Project Browser.

The context menu option Sync will select the relevant business rule node in the Project Explorer.

Sync context menu option the Project Browser.     Synced business rule node in the Project Explorer.

The definition of JavaScript, Email, and SQL business rules can be entered in the Script property.

Script text box allows direct editing of a business rule.

Code business rule files must be edited in an external text editor, such as Visual Studio. The Edit Rule action on the action bar will open the .cs(vb) file in Visual Studio.

Edit Rule action on the action bar will open the business rule in Visual Studio.

The Id of a business rule can be changed in the Project Explorer. Click on the Id property to start editing. The context menu action Rename in the Project Explorer also performs the same function.

Rename Id link in the edit form in the Project Browser.     Rename context menu option in the Project Explorer.

Business rules can be deleted using the context menu option Delete in the Project Explorer.

Delete context menu option in the Project Explorer.

Business rules can be moved to a different controller by dragging the business rule node.

Dragging a business rule onto a controller node.     Update business rule moved under Employees controller.

Wednesday, July 25, 2012PrintSubscribe
Overview of Business Rules

Business rules extend the functionality of a web application through SQL, C# or Visual Basic, JavaScript, or Email.

Business Rule Properties:

Property Description
Command Argument Specifies the argument of a command that will trigger the business rule. The property value is a regular expression.
Command Name Specifies the names of commands that will trigger the business rule to fire. The property value is a regular expression.

For example: Update|Insert|Delete
Controller Specifies which controller the business rule will apply to.
Id Specifies the Id of the business rule.
Name Specifies a user-friendly name of the business rule.
Phase Specifies the phase of the command in which the rule will fire. Calculate command can only use “Execute” phase.
Script Specifies the script of the rule. C#/Visual Basic rules can be edited in Visual Studio using the Edit Rule action on the action bar.
Type Specifies the type. Available options are: SQL, C#/Visual Basic, Email, JavaScript.
View Specifies which views will permit the rule to be triggered. The property value is a regular expression.

For example: editForm1|grid1

Learn to work with business rules in the Project Designer.

Learn to drag and drop business rules in the Project Explorer.

Common Tasks:

Task Description
SQL Validation Learn to create an SQL Business Rule to perform validation.
Shared Code Business Rule Learn to use the shared business rules file.
Custom Code Business Rule Learn to use custom business rules.
JavaScript Validation Learn to create a JavaScript Business Rule to perform validation.
Simple Email Notification Learn to create a simple notification using an Email Business Rule.
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