Setting Permission For a Command Using LightSwitch in Visual Studio 2012

Introduction

This article describes how to create a permission and write code to set permissions for the command using LightSwitch in Visual Studio 2012.

Here, we will learned how to define a permission for our application. The permission can be assigned to a user or a group of users.

Permission in LightSwitch for Commands

1. Creating a permission in LightSwitch

Step 1

Open the Solution Explorer in LightSwitch Visual Studio 2012.

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Step 2

In the Solution Explorer double-click or right-click and select "Properties".

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Step 3

The Application Designer will appear.

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Step 4

Choose the "Access control" option in the application designer.

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Step 5

Select the type of authentication to use and in this "Use form authentication".

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Step 6

In the "Define permissions or select permissions to use for debugging" node click on "<Add New Permission>" and then type "Can_View_Employee" under "Name".

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Step 7

Similarily, under the "Display Name" column type "View Employee".

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Step 8

And in the same manner under the "Description column" type "Provide access to the employee screen".

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2. Writing code to set permissions for the command

Step 1

In the Solution Explorer we will "Add Screen".

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Step 2

"Add New Screen" will appear.

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Step 3

Now we will select a screen template as "New Data Screen" and in the screen data we will select "Emp1Tables" and click "OK".

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Step 4

The Screen Designer will appear for the "Screen".

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Step 5

In the Screen Designer, expand "Command Bar". We will have an "Add" option under the Command Bar.

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Step 6

Click on the Add option to will see a drop down list consisting of an Add Button and Delete option.

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Step 7

Click on "New Button" option, a Dialog Box will appear.

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Step 8

Write the Name in "New Method" and click "OK." Here I have used "Delete" as Name.

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Step 9

Right-click on the ButtonName (Delete) and then choose "ButtonName_CanExecute", where ButtonName is the name of the command.

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Step 10

In the "Delete_CanExecute" method write the code that you want to enter, as in the following:

using System;

using System.Linq;

using System.IO;

using System.IO.IsolatedStorage;

using System.Collections.Generic;

using Microsoft.LightSwitch;

using Microsoft.LightSwitch.Framework.Client;

using Microsoft.LightSwitch.Presentation;

using Microsoft.LightSwitch.Presentation.Extensions;

 

namespace LightSwitchApplication

{

    public partial class CreateNewEmp1Tables

    {

        partial void CreateNewEmp1Tables_InitializeDataWorkspace(global::System.Collections.Generic.List<global::Microsoft.LightSwitch.IDataService> saveChangesTo)

        {

            // Write your code here.

            this.Emp1TablesProperty = new Emp1Tables();

        }

 

        partial void CreateNewEmp1Tables_Saved()

        {

            // Write your code here.

            this.Close(false);

            Application.Current.ShowDefaultScreen(this.Emp1TablesProperty);

        }

 

        partial void Delete_CanExecute(ref bool result)

        {

            // Write your code here.

 

        }

    }

}