XAF 字符串属性ComboBox的数据源DataSourcePropertyAttribute提供动态选择的值

1.Code

namespace MemberLevelSecurityDemo.Module
{
     #region " Copyright (c) 2007 to 2010 Extrasoft Ltd "
     //
     // ********************************************************************
     //    The entire contents of this file is protected by UK and
     //    International Copyright Laws. Unauthorized reproduction,
     //    reverse-engineering, and distribution of all or any portion of
     //    the code contained in this file is strictly prohibited and may
     //    result in severe civil and criminal penalties and will be
     //    prosecuted to the maximum extent possible under the law.
     //
     //    RESTRICTIONS
     //
     //    THIS SOURCE CODE AND ALL RESULTING INTERMEDIATE FILES
     //    ARE CONFIDENTIAL AND PROPRIETARY TRADE
     //    SECRETS OF EXTRASOFT LTD.
     //
     //    THE SOURCE CODE CONTAINED WITHIN THIS FILE AND ALL RELATED
     //    FILES OR ANY PORTION OF ITS CONTENTS SHALL AT NO TIME BE
     //    COPIED, TRANSFERRED, SOLD, DISTRIBUTED, OR OTHERWISE MADE
     //    AVAILABLE TO OTHER INDIVIDUALS WITHOUT EXPRESS WRITTEN CONSENT
     //    AND PERMISSION FROM EXTRASOFT LTD.
     //
     //    CONSULT THE END USER LICENSE AGREEMENT FOR INFORMATION ON
     //    ADDITIONAL RESTRICTIONS.
     //
     // ***************************************************************************

     #endregion
     using System;
     using System.ComponentModel;
     using DevExpress.Xpo;
     using DevExpress.ExpressApp;
     using DevExpress.ExpressApp.Win.Editors;

     using DevExpress.XtraEditors;
     using DevExpress.ExpressApp.Model;
     using System.Collections;

     public class WinStringArrayComboPropertyEditor : WinPropertyEditor
    {
         private string dataSourceProperty = string .Empty;
         public WinStringArrayComboPropertyEditor(Type objectType, IModelMemberViewItem info)
            : base (objectType, info)
        {
             this .ControlBindingProperty = " EditValue " ;
            dataSourceProperty = info.DataSourceProperty;
        }

         protected override object CreateControlCore()
        {
            ComboBoxEdit combo = CreateControl();
            combo.Properties.QueryPopUp += combo_QueryPopup;
             return combo;
        }

         protected override void Dispose( bool disposing)
        {
            ComboBoxEdit combo = this .Control as ComboBoxEdit;
             if (combo != null )
            {
                combo.Properties.QueryPopUp -= combo_QueryPopup;
            }
             base .Dispose(disposing);
        }

         protected override void OnControlCreated()
        {
            UpdateComboValues();
             base .OnControlCreated();
        }

         private ComboBoxEdit CreateControl()
        {
            ComboBoxEdit combo = new ComboBoxEdit();
             // This makes the combo text part non editable
            combo.Properties.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.DisableTextEditor;
             // Do any more combo setups here
             return combo;
        }

         private void UpdateComboValues()
        {
             if ( this .CurrentObject != null )
            {
                ComboBoxEdit combo = (ComboBoxEdit) this .Control;
                combo.Properties.Items.Clear();
                 try
                {
                    Type t = this .CurrentObject.GetType();
                     // string[] values = (string[])((XPCustomObject)this.CurrentObject).GetMemberValue(this.dataSourceProperty);
                     string [] values = ( string [])t.GetProperty( this .dataSourceProperty).GetValue( this .CurrentObject, null );
                     if (values != null )
                    {
                        combo.Properties.Items.AddRange(values);
                    }
                }
                 catch (Exception exception1)
                {
                    Exception ex = exception1;
                     throw new UserFriendlyException(ex);
                }
            }
        }

         private void combo_QueryPopup( object sender, CancelEventArgs e)
        {
            UpdateComboValues();
        }

    }

}

2.测试Code

using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.ComponentModel;

using DevExpress.Xpo;
using DevExpress.Xpo.Metadata;
using DevExpress.ExpressApp.DC;
using DevExpress.Data.Filtering;

using DevExpress.ExpressApp;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl;
using DevExpress.Persistent.Validation;

namespace MemberLevelSecurityDemo.Module
{
    [DefaultClassOptions()]
     public class TestObject : BaseObject
    {
         public TestObject(Session session)
            : base (session)
        {
        }
         private string _name;
         public string Name
        {
             get { return _name; }
             set { SetPropertyValue( " Name " , ref _name, value); }
        }
         private string _type;
        [DataSourceProperty( " Types " )]
        [Custom( " PropertyEditorType " , " MemberLevelSecurityDemo.Module.WinStringArrayComboPropertyEditor " )]
        [Size( 200 )]
         public string Type
        {
             get { return _type; }
             set { SetPropertyValue( " Type " , ref   _type, value); }
        }

        [Browsable( false )]
         public object Types
        {
             get { return GetTypes(); }
        }
         /// <summary>
         /// A trivial method to return a list of strings
         /// </summary>
         private string [] GetTypes()
        {
            List < string > memberlist = new List < string > ();
             foreach (XPMemberInfo minfo in this .ClassInfo.Members)
            {
                memberlist.Add(minfo.MemberType.FullName);
            }
             return memberlist.ToArray();
        }

    }

}

参考：A Win String PropertyEditor with ComboBox supporting DataSourcePropertyAttribute to provide a dynamic selection of values

http://community.devexpress.com/forums/t/81628.aspx

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XAF 字符串属性ComboBox的数据源DataSourcePropertyAttribute提供动态选择的值

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