Get permission level of a folder

Question

I have an EventHandler that checks permission level.

 private void button1_Click(object sender, EventArgs e)
    {
        int id = 1;
            XMLPermSheet.CreateXML();
            string directory = textBox1.Text;
            DirectoryInfo di = new DirectoryInfo(directory);
            DirectoryInfo[] sdi = di.GetDirectories();
            foreach (DirectoryInfo tdi in sdi)
            {
                if (!tdi.ToString().EndsWith("System Volume Information") && !tdi.ToString().Contains("$RECYCLE.BIN"))
                {
                    XMLPermSheet.AddPath(tdi.ToString(), id);
                    DirectorySecurity ds = tdi.GetAccessControl();

                    foreach (AccessRule rule in ds.GetAccessRules(true, true, typeof(NTAccount)))
                    {
                        richTextBox1.AppendText(string.Format("{0} || Identity = {1}; Access = {2} \r\n", tdi.ToString(),
                        rule.IdentityReference.Value, rule.AccessControlType));
                        XMLPermSheet.AddIdentity(rule.IdentityReference.Value.ToString(), rule.AccessControlType.ToString(), tdi.ToString());
                    }

                    id += 1;
                }
            }
    }

rule.AccessControlType.ToString() returns only "Allow" or "Deny" but I need to get something this:

View: True
Add: True
Modify: False
Delete: False

How can i achieve this ?

Answer 1

You have to change AccessRule in your foreach to FileSystemAccessRule. Then you have access to the property FileSystemRights. This answer explains how to get the rights.

Short version, on how to check if User or Group has Permission:

//Example: Change    
bool hasChangePermission = rule.FileSystemRights.HasFlag(FileSystemRights.ChangePermissions);

//Example: Write
bool hasWritePermission = rule.FileSystemRights.HasFlag(FileSystemRights.Write);

Here's a small example method:

public string GetRuleAsString(FileSystemAccessRule rule)
{
    string userName = rule.IdentityReference.Value;

    //Example: Change    
    bool hasChangePermission = rule.FileSystemRights.HasFlag(FileSystemRights.ChangePermissions);

    //Example: Write
    bool hasWritePermission = rule.FileSystemRights.HasFlag(FileSystemRights.Write);

    return String.Format("{0}\n Change: {1}\n Write: {2}", userName, hasChangePermission, hasWritePermission);
}