How To Check Permissions On A Sharepoint Folder Client Object Model

Checking permissions on a SharePoint folder using the Client Object Model is essential for managing access control and ensuring data security. To accomplish this, there are two methods that can be utilized: using the SharePoint web service or leveraging the EffectiveBasePermissions property in the ClientContext.

Using the SharePoint Web Service

One way to check permissions on a SharePoint folder is by querying the SharePoint Permission web service. This web service provides detailed information about SharePoint permissions and can be accessed through the URL “http:///_vti_bin/permissions.asmx”. By using JavaScript, you can easily check the permissions and verify user or group access to specific items.

Using the EffectiveBasePermissions Property in the ClientContext

The other method involves utilizing the EffectiveBasePermissions property of the List object in the ClientContext. This property allows you to determine if a user has specific permissions on a document library. For instance, you can use the DoesUserHasPermission method to check if a user has the necessary permissions to edit list items. The list’s EffectiveBasePermissions property is loaded and then the query is executed to retrieve the user’s permissions. The returned bitmask of permission levels indicates the user’s access rights.

Here is an example of how to check permissions using the Client Object Model in C#:


private static bool DoesUserHasPermission(ClientContext context, List list, PermissionKind permissionKind)
{
context.Load(list, t => t.EffectiveBasePermissions);
context.ExecuteQuery();
return list.EffectiveBasePermissions.Has(permissionKind);
}

The provided code demonstrates the implementation of the DoesUserHasPermission method, which takes the ClientContext, List, and PermissionKind as parameters. The method loads the EffectiveBasePermissions property for the list, executes the query to retrieve the permissions, and determines if the user has the specified permission.

By utilizing these methods in the Client Object Model, you can effectively check permissions on a SharePoint folder, enabling you to control access and safeguard your data.

Using the SharePoint Web Service

The SharePoint web service offers a reliable way to query permissions and check user/group access rights on SharePoint items. By accessing the SharePoint Permission web service via the URL “http:///_vti_bin/permissions.asmx”, you can gather information about SharePoint permissions and utilize JavaScript to check these permissions.

To check user/group permissions on items, you can query the SharePoint Permission web service and extract the necessary data. By integrating JavaScript into your code, you can easily verify the permissions for specific users or groups. This method provides a flexible and efficient way to validate access rights through the Client Object Model.

It is important to note that the SharePoint web service enables you to obtain detailed information about permissions, granting you control over user access on SharePoint items. By leveraging this method, you can ensure the appropriate level of access is maintained across SharePoint folders.

Advantages Disadvantages
Easy to implement Requires JavaScript integration
Provides detailed permission information Relies on the SharePoint web service
Flexible and efficient

Example of Checking Permissions with the SharePoint Web Service

To illustrate the process of checking permissions using the Client Object Model, consider the following code snippet in JavaScript:


const permissionsUrl = 'http:///_vti_bin/permissions.asmx';
// Perform necessary JavaScript operations to check permissions.

In this example, the permissionsUrl variable represents the URL to access the SharePoint Permission web service. You can use this URL as the basis for querying and validating permissions on SharePoint items.

By employing the SharePoint web service in conjunction with JavaScript, you can effectively check and manage user/group access rights on SharePoint folders.

Using the EffectiveBasePermissions Property in the ClientContext

Another approach to check permissions on a SharePoint folder is by utilizing the EffectiveBasePermissions property in the ClientContext, providing a granular control over user access levels. This method allows you to determine if a user has specific permissions on a document library.

To implement this approach, you can use the EffectiveBasePermissions property of the List object in the ClientContext. By loading the List and the EffectiveBasePermissions property, you can then execute a query to get the permissions.

Here is an example of how to check permissions using the Client Object Model in C#:

private static bool DoesUserHasPermission(ClientContext context, List list, PermissionKind permissionKind)
{
    context.Load(list, t => t.EffectiveBasePermissions);
    context.ExecuteQuery();
    return list.EffectiveBasePermissions.Has(permissionKind);
}

In the above example, the DoesUserHasPermission method takes the ClientContext, List, and PermissionKind as parameters and returns a bool indicating if the user has the specified permission. This method loads the EffectiveBasePermissions property for the list, executes the query to get the permissions, and then uses the Has method to check if the user has the specified permission.

By utilizing the EffectiveBasePermissions property in the ClientContext, you can easily check permissions on a SharePoint folder and implement the necessary access control in your client application.

Meet the Author

Abdul Rahim has been working in Information Technology for over two decades. Learn how Abdul got his start as a Tech Blogger , and why he decided to start this Software blog. If you want to send Abdul a quick message, then visit his contact page here.