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.NET 6.0+

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

Checks whether the specified user can write an object with the specified key or this object’s member.

Namespace: DevExpress.ExpressApp.Security

Assembly: DevExpress.ExpressApp.Security.v24.1.dll

Declaration

public static bool CanWriteByUser(
    this SecurityStrategy security,
    IPermissionPolicyUser targetUser,
    Type type,
    IObjectSpace objectSpace,
    object targetObjectKey,
    string memberName = null
)

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.

type Type

A Type of an object this method checks.

objectSpace IObjectSpace
targetObjectKey Object

An Object that is a key of an object this method checks.

Optional Parameters

Name Type Default Description
memberName String null

A String that is a name of the target object’s member this method checks. This parameter is optional.

Returns

Type Description
Boolean

true, if the specified user can write an object with the specified key or this object’s member; otherwise, false.

Remarks

The following example shows how to use this method.

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) {
        Department department = ViewCurrentObject.Department;
        if (department != null) {
            object key = ObjectSpace.GetKeyValue(department);
            foreach (IPermissionPolicyUser user in ObjectSpace.GetObjects<ApplicationUser>()) {
                if (!securityStrategy.CanWriteByUser(user, typeof(Department), ObjectSpace, key, nameof(Department.Office))) {
                    // ...
                }
            }
        }
    }
}
See Also