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

 

 

 

private string _ActionId;
        [DataSourceProperty("list")]
        [Custom("PropertyEditorType", "MemberLevelSecurityDemo.Module.WinStringArrayValueComboPropertyEditor")]
        public string ActionId
        {
            get
            {
                return _ActionId;
            }
            set
            {
                SetPropertyValue("ActionId", ref _ActionId, value);
            }
        }

        public List<KeyValue> list = new List<KeyValue>() { new KeyValue("A", "B") };

public class KeyValue 
    {

        public KeyValue(string key, string value)
        {
            this.Key = key; this.Value = value;
        }
     

        public string Key { get; set; }
        public string Value { get; set; }
    }

 

using System;
    using System.ComponentModel;
    using DevExpress.Xpo;
    using DevExpress.ExpressApp;
    using DevExpress.ExpressApp.Win.Editors;
    using DevExpress.ExpressApp.Model;
    using DevExpress.XtraEditors;
    using DevExpress.XtraEditors.Controls;
    using DevExpress.XtraEditors.Repository;

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

        protected override object CreateControlCore()
        {
            DevExpress.XtraEditors.LookUpEdit combo = CreateControl();
            combo.Properties.QueryPopUp += combo_QueryPopup;

            return combo;
        }

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

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

        private DevExpress.XtraEditors.LookUpEdit CreateControl()
        {

            LookUpEdit combo = new LookUpEdit();
            combo.Properties.DisplayMember = "Key";
            combo.Properties.ValueMember = "Value";
            combo.Properties.DropDownRows = 10;
            //combo.Properties.TextEditStyle = this.AllowEdit.ResultValue ? TextEditStyles.Standard : TextEditStyles.DisableTextEditor;

            // Do any more combo setups here
            return combo;
        }

        private void UpdateComboValues()
        {
            if (this.CurrentObject != null)
            {
                LookUpEdit combo = (LookUpEdit)this.Control;
             
                try
                {
                    Type t = this.CurrentObject.GetType();
                    ////string[] values = (string[])((XPCustomObject)this.CurrentObject).GetMemberValue(this.dataSourceProperty);
                    object datasource = (t.GetField(this.dataSourceProperty)).GetValue(this.CurrentObject);
                           
                    if (datasource != null)
                    {
                        combo.Properties.DataSource = datasource;
                    }
                }
                catch (Exception exception1)
                {
                    Exception ex = exception1;
                    throw new UserFriendlyException(ex);
                }
            }
        }

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

    }