IsGrantedExtensions.CanRead<T>(IRequestSecurityStrategy, IObjectSpace, Object, String) Method

Checks whether the current user can read an object with the specified key. If the optional memberName parameter is specified, the method checks whether the current user can read the specified object member.

Namespace: DevExpress.ExpressApp.Security

Assembly: DevExpress.ExpressApp.Security.v25.1.dll

NuGet Package: DevExpress.ExpressApp.Security

Declaration

C#

public static bool CanRead<T>(
    this IRequestSecurityStrategy security,
    IObjectSpace objectSpace,
    object targetObjectKey,
    string memberName = null
)

VB.NET

<ExtensionAttribute>
Public Shared Function CanRead(Of T)(
    security As IRequestSecurityStrategy,
    objectSpace As IObjectSpace,
    targetObjectKey As Object,
    memberName As String = Nothing
) As Boolean

Parameters

Name	Type	Description
security	IRequestSecurityStrategy	An object that specifies the application’s security strategy.
objectSpace	IObjectSpace	An Object Space used to obtain data to calculate this security criterion.
targetObjectKey	Object	The object’s key.

Optional Parameters

Name	Type	Default	Description
memberName	String	null	A name of the target object’s member to check.

Type Parameters

Name	Description
T	The object’s type.

Returns

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

Remarks

C#

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Security;
using System;
// ...
public class CheckReadPermissionController : 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) {
    Department department = ViewCurrentObject.Department;
        if (department != null) {
            object key = ObjectSpace.GetKeyValue(department);
            if (!securityStrategy.CanRead<Department>(ObjectSpace, key, nameof(Department.Office))) {
                // ...
            }
        }
    }
}