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POSharepoint: web part programmatically changing permissions, cannot get the changes to persist
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  1. POSharepoint: web part programmatically changing permissions, cannot get the changes to persist
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    copied!<p>I'm writing a visual web part in visual studio for sharepoint 2010. The whole point of this web part is to change permissions around at the click of a button. I am able to access the permissions and output them to the screen. I'm able to change the permissions in the objects that I have, and then show the changed permissions on the screen. My problem is, after everything is done, no actual permissions have been changed.</p> <p>webpart.TargetLibrary is a text field, inputted elsewhere as the name of the library I wish to investigate.</p> <pre><code>SPListCollection docLibs = m_SharePointWeb.GetListsOfType(SPBaseType.DocumentLibrary); SPDocumentLibrary targetLib = (SPDocumentLibrary)(docLibs[webPart.TargetLibrary]); SPListItemCollection libFolders = targetLib.Folders; SPListItem folderItem = libFolders[0]; SPRoleAssignmentCollection folderRoles = folderItem.RoleAssignments; SPRoleAssignment roleAssign = folderRoles[0]; SPRoleDefinitionBindingCollection spRDBC = roleAssign.RoleDefinitionBindings; SPRoleDefinition Contribute = spRDBC[0].ParentWeb.RoleDefinitions["Contribute"]; folderItem.RoleAssignments[0].RoleDefinitionBindings.Add(Contribute); folderItem.Update(); </code></pre> <p>This is a somewhat simplified version - the original had some for loops and various bits of other code doing other things. Regardless, by everything I've been able to piece together from looking online, this code <em>should</em> add "Contribute" privs to the first role on the list in the first folder. As I mentioned, it does so to the local objects, but has no permanent effect. The Update() call appears to do nothing, and I'm not certain it's meant to be there in this case. I tried UpdateOverwriteVersion() - that doesn't do anything either. Any suggestions on what I might be doing wrong would be appreciated.</p> <p>As a side note, it's not nearly so much of an issue, but I can't help the feeling that there's a more efficient and straightforward way to get a web object so that I can acquire role definitions by name. Any advice on that matter would also be appreciated.</p> <p>Edit: solution moved to answer, below.</p>
 

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