Check if Custom Permission level exists or not

Question

I have cretaed a custom permission level.
On feature activation, i need to check if that custom permission level exists or not. How can i do that?
Thanks,
Avni Bhatt

Answer 1

Check if below helps
SPWeb web = SPContext.Current.Web;
// Validate the page request to avoid
// any malicious posts
if (Request.HttpMethod == “POST”)
   SPUtility.ValidateFormDigest();
// Get a reference the roles that are
// bound to the current user and the role
// definition to which we need to verify
// the user against
SPRoleDefinitionBindingCollection usersRoles = web.AllRolesForCurrentUser;
SPRoleDefinitionCollection roleDefinitions = web.RoleDefinitions;
SPRoleDefinition roleDefinition = roleDefinitions["Full Control"];
// Check if the user is in the role. If not
// redirect the user to the access denied page
if (usersRoles.Contains(roleDefinition))
   //Check if post back to run
   //code that initiates the page
   if (IsPostBack != true)
    //Do your stuff here
else
   Response.Redirect(“/_layouts/accessdenied.aspx”);
http://blog.rafelo.com/2008/10/13/programmatically-checking-user-roles-or-permission-levels-in-sharepoint-2007/
http://yoursandmyideas.wordpress.com/2011/10/08/setting-custom-permission-levels-in-sharepoint-programmatically/
Or check if it exist and then delete and recreate it
string[] yourCustomRoles = {"Level1", "Level2"};
using (var web = spSite.OpenWeb())
var roles = web.RoleDefinitions;
foreach(var levelName in yourCustomRoles)
try
roles[levelName];
roles.Delete(levelName);
catch(Exception)
// web has no this role
//Add code here
http://go4answers.webhost4life.com/Example/delete-specific-permissions-108626.aspx