Winform開發中使用下拉選單展示字典資料的幾種方式

combo.Properties.BeginUpdate();//可以加快
combo.Properties.Items.Clear();
combo.Properties.Items.AddRange(itemList);
combo.Properties.EndUpdate();//可以加快

/// <summary>
/// 繫結下拉選單控制元件為指定的資料字典列表
/// </summary>
/// <param name="combo">下拉選單控制元件</param>
/// <param name="itemList">資料字典列表</param>
/// <param name="defaultValue">控制元件預設值</param>
/// <param name="emptyFlag">是否加入空值選項</param>
public static void BindDictItems(this ComboBoxEdit combo, List<CListItem> itemList, string defaultValue, bool emptyFlag = true)
{
    combo.Properties.BeginUpdate();//可以加快
    combo.Properties.Items.Clear();
    combo.Properties.Items.AddRange(itemList);
    if (emptyFlag)
    {
        combo.Properties.Items.Insert(0, new CListItem(""));
    }

    if (itemList.Count > 0)
    {
        if (!string.IsNullOrEmpty(defaultValue))
        {
            combo.SetComboBoxItem(defaultValue);
        }
        else
        {
            combo.SelectedIndex = 0;
        }
    }

    combo.Properties.EndUpdate();//可以加快
}

private void InitDictItem()
{
    this.txtManufacture.Items.Clear();
    this.txtManufacture.Items.AddRange(DictItemUtil.GetDictByDictType("供貨商"));

    this.txtBigType.Items.Clear();
    this.txtBigType.Items.AddRange(DictItemUtil.GetDictByDictType("備件屬類"));
}

/// <summary>
/// 繫結下拉選單控制元件為指定的資料字典列表
/// </summary>
/// <param name="control">下拉選單控制元件</param>
/// <param name="dictTypeName">資料字典型別名稱</param>
/// <param name="defaultValue">控制元件預設值</param>
/// <param name="emptyFlag">是否新增空行</param>
public static void BindDictItems(this ComboBoxEdit control, string dictTypeName, string defaultValue, bool emptyFlag = true)
{
    Dictionary<string, string> dict = BLLFactory<DictData>.Instance.GetDictByDictType(dictTypeName);
    List<CListItem> itemList = new List<CListItem>();
    foreach (string key in dict.Keys)
    {
        itemList.Add(new CListItem(key, dict[key]));
    }

    control.BindDictItems(itemList, defaultValue, emptyFlag);
}

private void InitDictItem()
{
    this.txtManufacture.BindDictItems("供貨商");
    this.txtSearchManufacture.BindDictItems("供貨商");
    this.txtSearchDept.BindDictItems("部門");
}

//繫結資料來源和顯示的內容、隱藏值
this.txtProjectList.Properties.DataSource = list;
this.txtProjectList.Properties.ValueMember = "Value";
this.txtProjectList.Properties.DisplayMember = "Text";

//設定Grid顯示的列資訊
var columns = new List<LookUpColumnInfo>()
{
    new LookUpColumnInfo("Value", "顯示名稱")
};
for (int i = 0; i < columns.Count; i++)
{
    this.txtProjectList.Properties.View.CreateColumn(columns[i].FieldName, columns[i].Caption,
        columns[i].Width, true, UnboundColumnType.Bound, DefaultBoolean.False, FixedStyle.None);
}

//其他屬性設定
this.txtProjectList.Properties.ImmediatePopup = true;
this.txtProjectList.Properties.TextEditStyle = TextEditStyles.Standard;
this.txtProjectList.Properties.PopupWidthMode = DevExpress.XtraEditors.PopupWidthMode.ContentWidth;

//設定列表的序號的寬度和顯示文字
this.txtProjectList.Properties.View.IndicatorWidth = 40;
this.txtProjectList.Properties.View.CustomDrawRowIndicator += (s, e) =>
{
    if (e.Info.IsRowIndicator && e.RowHandle >= 0)
    {
        e.Info.DisplayText = (e.RowHandle + 1).ToString();
    }
};

        /// <summary>
        /// 繫結控制元件的資料來源
        /// </summary>
        /// <param name="lookup">控制元件物件</param>
        /// <param name="dataSource">資料來源</param>
        /// <param name="displayMember">顯示欄位</param>
        /// <param name="valueMember">值欄位</param>
        /// <param name="showRowIndicator">是否顯示序號</param>
        /// <param name="lookUpColumnInfos">顯示的列</param>
        /// <returns></returns>
        public static object BindDictItems(this GridLookUpEdit lookup, object dataSource, string displayMember, string valueMember, bool showRowIndicator = true, params LookUpColumnInfo[] lookUpColumnInfos)
        {
            lookup.Properties.DataSource = dataSource;
            lookup.Properties.DisplayMember = displayMember;
            lookup.Properties.ValueMember = valueMember;

            lookup.Properties.View.Columns.Clear();
            for (int i = 0; i < lookUpColumnInfos.Length; i++)
            {
                lookup.Properties.View.CreateColumn(lookUpColumnInfos[i].FieldName, lookUpColumnInfos[i].Caption,
                    lookUpColumnInfos[i].Width, true, UnboundColumnType.Bound, DefaultBoolean.False, FixedStyle.None);
            }
            lookup.Properties.ImmediatePopup = true;
            lookup.Properties.TextEditStyle = TextEditStyles.Standard;

            if (showRowIndicator)
            {
                lookup.Properties.View.IndicatorWidth = 40;
                //重寫序號顯示，預設不顯示數值
                lookup.Properties.View.CustomDrawRowIndicator += (s, e) =>
                {
                    if (e.Info.IsRowIndicator && e.RowHandle >= 0)
                    {
                        e.Info.DisplayText = (e.RowHandle + 1).ToString();
                    }
                };
            }

            return dataSource;
        }

var list = DictItemUtil.GetDictByDictType("備件類別");
var columns = new List<LookUpColumnInfo>()
{
    new LookUpColumnInfo("Value", "顯示名稱")
};

this.txtProjectList2.BindDictItems(list, "Text", "Value", true, columns.ToArray());