This topic describes the Security System's permission types. Configure permissions in a role and assign it to a user. Each user should have at least one role. The Security System checks permissions for each role and determines access rights as described in the Permission merging between different roles topic.
The IPermissionPolicyRole.IsAdministrative option grants all available permissions to a role.
You cannot deny any rights for a role with the Administrative Permission.
When the Edit Model or Administrative permission is granted, the EditModel Action is available in the Tools category.
The Permission Policy determines the Security System's behavior when a specific type, object or member does not have explicitly specified permissions. Refer to the Permission policies topic for more information.
In XAF applications, you can manage access to navigation control's items in the Navigation Permissions tab. You can grant or deny a permission for a single navigation item or for the whole navigation group as shown on the image below:
Item permissions have a greater priority than group permissions. For instance, if you deny access to the group, but grant access for one of its items, this item is enabled in the navigation control.
Navigation permissions manage the visibility of the navigation control's items. They do not grant or deny access to navigation items' associated business objects. Use Type permissions or Object permissions to manage access to these objects.
The Type Permissions tab specifies access to all objects of a particular type. The image below illustrates the PermissionPolicyUser Detail View.
The following operation types can be granted or denied:
|Read||Objects of the current type are readable. To make an object read-only, allow the Read operation and deny the Write operation.|
|Write||Objects of the current type are editable.|
|Create||New objects of the current type can be created. Note that granting Create without Write does not allow a user to save new objects.|
|Delete||Objects of the current type can be deleted.|
Object permissions grant access to object instances that fit a specified criterion. The following image illustrates the Object Permissions tab in the Type Operation Permissions dialog.
Member permissions grant access to specific members of an object. Double-click a record in a type permission list invokes the following dialog.
For example, users can have access to objects of a particular type and simultaneously have no access to several members of this type. For another example, it is possible to deny access to objects of a particular type and only allow access to a strict list of its members. You can set a Members value to a string that is a semicolon-separated list of property names. In WinForms and ASP.NET applications, the CheckedListBoxPropertyEditor simplifies the specification of a Members value (select member names in the combo box).
You can also specify a criterion for a Member permission entry. The entry is active when the current object meets the criterion.
The Security System automatically configures permissions for one side of an association if the other side is specified. The Permissions for Associated Objects topic describes this behavior. You can also specify permissions for both sides of an association. Refer to the How to: Manually Configure Permissions for Associated Collections and Reference Properties topic for more information on this approach.
To determine whether access to reference properties such as AssignedTo and complex reference properties such as AssignedTo.Name is allowed, the Security System checks the current type's Type permissions, the reference property type's Type permissions, and each member's Member permissions (in the property path). For example, when the SecuritySystem.IsGranted method is called to determine whether the current user can modify the AssignedTo.Name property, the Security System checks the following operations:
Non-persistent object types are not included in the Type permissions list and are accessible to everyone. Add the non-persistent object type to the static SecurityStrategy.AdditionalSecuredTypes collection to include this type in the Type permissions list.
Non-persistent types support only the Type and Member permissions, and the Security System applies these permissions only at the UI Level. Refer to the Client-Side Security (2-Tier Architecture) - UI Level Mode topic for more information about this mode and its limitations.
Refer to the following topics for more information on security customization: