Use the RoleDefinitions property of the SPWeb class to get the collection of role definitions for a Web site. Use an indexer to return a single item from the collection. For example, if the collection is assigned to a variable named collRoleDefinitions, use collRoleDefinitions[index] in C#, or collRoleDefinitions(index) in Visual Basic, where index is either the index number of the item in the collection or a string that contains the name of the role definition.
There is not a method to retrieve user role assignments on a Windows SharePoint Services list object. However, the code below allows you to retrieve this list.
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private void AddListRoleAssignmentNodes(SPList objList)
{
try
{
if (objList.HasUniqueRoleAssignments)
{
SPRoleAssignmentCollection oRoleAssignments =
objList.RoleAssignments;
foreach (SPRoleAssignment oRoleAssignment in oRoleAssignments)
{
SPPrincipal oPrincipal = oRoleAssignment.Member;
try
{
// Retrieve users having explicit permissions on the list
SPUser oRoleUser = (SPUser)oPrincipal;
}
catch (Exception ex)
{
string msg = ex.Message;
}
try
{
// Retrieve user groups having permissions on the list
SPGroup oRoleGroup = (SPGroup)oPrincipal;
if (oRoleGroup.Users.Count > 0)
{
string strGroupName = oRoleGroup.Name;
// Add code here to retrieve Users inside this User-Group
}
}
catch (Exception ex)
{
string msg = ex.Message;
}
}
}
}
catch (Exception ex)
{
string msg = ex.Message;
}
}
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