IsGrantedExtensions.CanWriteByUser(SecurityStrategy, IPermissionPolicyUser, Object, String) Method

Checks whether the specified user can write the specified object or its member.

Namespace: DevExpress.ExpressApp.Security

Assembly: DevExpress.ExpressApp.Security.v23.2.dll

NuGet Package: DevExpress.ExpressApp.Security

Declaration

C#

public static bool CanWriteByUser(
    this SecurityStrategy security,
    IPermissionPolicyUser targetUser,
    object targetObject,
    string memberName = null
)

VB.NET

<ExtensionAttribute>
Public Shared Function CanWriteByUser(
    security As SecurityStrategy,
    targetUser As IPermissionPolicyUser,
    targetObject As Object,
    memberName As String = Nothing
) As Boolean

Parameters

Name	Type	Description
security	SecurityStrategy	A SecurityStrategy object that specifies an application’s Security Strategy.
targetUser	IPermissionPolicyUser	An IPermissionPolicyUser object that is a user this method checks.
targetObject	Object	An Object this method checks.

Optional Parameters

Name	Type	Default	Description
memberName	String	null	A String that is a name of the targetObject‘s member this method checks. This parameter is optional.

Returns

Type	Description
Boolean	true, if the specified user can write the specified object or its member; otherwise, false.

Remarks

Important

This overload of the CanWriteByUser method may reduce performance and cause incorrect behavior in some usage scenarios. We recommend that you always use the CanWriteByUser method’s overloads that accept an Object Space as a parameter to check permissions for a specific object.

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 (IPermissionPolicyUser user in ObjectSpace.GetObjects<ApplicationUser>()) {
            if (!securityStrategy.CanWriteByUser(user, ViewCurrentObject.Department, nameof(Department.Office))) {
                // ...
            }
        }
    }
}