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.NET Standard 2.0+

RichEditControlOptionsBase.Authentication Property

Provides access to an object used to specify the identity parameters for range editing permissions.

Namespace: DevExpress.XtraRichEdit

Assembly: DevExpress.RichEdit.v19.1.Core.dll

Declaration

public AuthenticationOptions Authentication { get; }
Public ReadOnly Property Authentication As AuthenticationOptions
public AuthenticationOptions Authentication { get; }
Public ReadOnly Property Authentication As AuthenticationOptions

Property Value

Type Description
AuthenticationOptions

An AuthenticationOptions class instance that holds identity parameters.

Property Value

Type Description
AuthenticationOptions

An AuthenticationOptions class instance that holds identity parameters.

Remarks

This code snippet demonstrates how you can fetch usernames assigned to protected ranges in a document and identify the current user as being one of the particular users. It allows you to edit the range with editing permissions granted to that user.

The SubDocument.BeginUpdateRangePermissions method is used to get all permissions for document ranges. Call the SubDocument.CancelUpdateRangePermissions if you do not intend to modify them.

Then, we traverse the collection of range permissions and obtain user names via the RangePermission.UserName property. The ComboBoxEdit control is filled with the names, so an existing name can be selected to log in.

To log in (i.e. to specify the user whose permissions will be in effect), the RichEditControlOptionsBase.Authentication options are used.

using DevExpress.XtraRichEdit;
using DevExpress.XtraRichEdit.API.Native;
using DevExpress.XtraRichEdit.Services;
        void richEditControl1_DocumentLoaded(object sender, EventArgs e)
        {
            UpdateUserNameLoginCombo();
            richEditControl1.Options.Authentication.UserName = String.Empty;
        }
        private void UpdateUserNameLoginCombo()
        {
            cmbUserName.SelectedValueChanged-=cmbUserName_SelectedValueChanged;
            RangePermissionCollection rangePermissions = richEditControl1.Document.BeginUpdateRangePermissions();
            richEditControl1.Document.CancelUpdateRangePermissions(rangePermissions);
            List<String> users = new List<string>();
            foreach (RangePermission rangePermission in rangePermissions)
            {
                string userName = rangePermission.UserName;
                if (users.Contains(userName))
                    continue;
                if (!String.IsNullOrEmpty(userName))
                    users.Add(userName);
            }
            cmbUserName.Properties.BeginUpdate();
            cmbUserName.Properties.Items.Clear();
            cmbUserName.Properties.Items.Add(String.Empty);
            cmbUserName.Properties.Items.AddRange(users);
            foreach (MyUser user in myUserList) {
                if (!users.Contains(user.UserName)) cmbUserName.Properties.Items.Add(user.UserName);
            }
            cmbUserName.SelectedIndex = 0;
            cmbUserName.Properties.EndUpdate();
            cmbUserName.SelectedValueChanged += cmbUserName_SelectedValueChanged;
        }

        private void cmbUserName_SelectedValueChanged(object sender, EventArgs e)
        {
            string username = cmbUserName.SelectedItem.ToString();
            richEditControl1.Options.Authentication.UserName = username;
            MyUser myuser = myUserList.Find(s => s.UserName == username);
            richEditControl1.Options.Authentication.Group = (myuser != null) ? myuser.Group : String.Empty;

        }
See Also