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