IsGrantedExtensions.CanWriteByRole(SecurityStrategy, IPermissionPolicyRole, Type, String) Method

Checks whether the current user can write objects of the specified type or their member.

Namespace: DevExpress.ExpressApp.Security

Assembly: DevExpress.ExpressApp.Security.v19.2.dll

Declaration

C#

public static bool CanWriteByRole(
    this SecurityStrategy security,
    IPermissionPolicyRole targetRole,
    Type type,
    string memberName = null
)

VB.NET

<ExtensionAttribute>
Public Shared Function CanWriteByRole(
    security As SecurityStrategy,
    targetRole As IPermissionPolicyRole,
    type As Type,
    memberName As String = Nothing
) As Boolean

Parameters

Name	Type	Description
security	SecurityStrategy	A SecurityStrategy object that specifies an application’s Security Strategy.
targetRole	IPermissionPolicyRole	An IPermissionPolicyRole object that is a role this method checks.
type	Type	A Type of objects this method checks.

Optional Parameters

Name	Type	Default	Description
memberName	String	*null*	A String that is a name of an objects’ member this method checks. This parameter is optional.

Returns

Type	Description
Boolean	true, if the current user can write objects of the specified type or their member; otherwise, false.

Remarks

The following example shows how to use this method.

C#

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Security;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl.PermissionPolicy;
using System;
// ...
public class CheckWritePermissionController : ObjectViewController<ListView, Contact> {
    SecurityStrategy securityStrategy;
    protected override void OnActivated() {
        base.OnActivated();
        securityStrategy = Application.GetSecurityStrategy();
        View.CurrentObjectChanged += View_CurrentObjectChanged;
    }
    private void View_CurrentObjectChanged(object sender, EventArgs e) {
        foreach (IPermissionPolicyRole role in ObjectSpace.GetObjects<PermissionPolicyRole>()) {
            if (!securityStrategy.CanWriteByRole(role, typeof(Department), nameof(Department.Office))) {
                // ...
            }
        }
    }
}

VB.NET

Imports DevExpress.ExpressApp
Imports DevExpress.ExpressApp.Security
Imports DevExpress.Persistent.Base
Imports DevExpress.Persistent.BaseImpl.PermissionPolicy
Imports System
' ...
Public Class CheckWritePermissionController
    Inherits ObjectViewController(Of ListView, Contact)
    Private securityStrategy As SecurityStrategy
    Protected Overrides Sub OnActivated()
        MyBase.OnActivated()
        securityStrategy = Application.GetSecurityStrategy()
        AddHandler View.CurrentObjectChanged, AddressOf View_CurrentObjectChanged
    End Sub
    Private Sub View_CurrentObjectChanged(ByVal sender As Object, ByVal e As EventArgs)
        For Each role As IPermissionPolicyRole In ObjectSpace.GetObjects(Of PermissionPolicyRole)()
            If Not securityStrategy.CanWriteByRole(role, GetType(Department), NameOf(Department.Office)) Then
                ' ...
            End If
        Next role
    End Sub
End Class