使用语句控制DEV下拉菜单

1、DevExpress.XtraEditors.LookUpEdit的基本用法

public void InitLookUpEditor()
    {
        //
        this.lookupEditFields.Properties.Columns.AddRange(new DevExpress.XtraEditors.Controls.LookUpColumnInfo[] {
            new DevExpress.XtraEditors.Controls.LookUpColumnInfo("DisplayMember", "DisplayMember", 20, DevExpress.Utils.FormatType.None, "", true, DevExpress.Utils.HorzAlignment.Default, DevExpress.Data.ColumnSortOrder.None),
            new DevExpress.XtraEditors.Controls.LookUpColumnInfo("ValueMember", "", 20, DevExpress.Utils.FormatType.None, "", false, DevExpress.Utils.HorzAlignment.Default, DevExpress.Data.ColumnSortOrder.None)});

        DataTable dt = new DataTable();
        dt.Columns.Add("ValueMember");
        dt.Columns.Add("DisplayMember");
        dt.Columns.Add("DataType");
        dt.Columns.Add("IsExtandedField");

        DataRow row = dt.NewRow();
        row["DataType"] = "";
        row["IsExtandedField"] = true;
        row["DisplayMember"] = "";
        row["ValueMember"] = "";
        dt.Rows.Add(row);

        this.lookupEditFields.Properties.DisplayMember = "DisplayMember";
        this.lookupEditFields.Properties.ValueMember = "ValueMember";
        this.lookupEditFields.Properties.DataSource = dt;

        if (dt.Rows.Count > 0)
        {
            //自动搜索datasouse，选择与之匹配的值，没有的情况下赋值null ,value的值必须与valuemember的数据类型一致。
            lookupEditFields.EditValue = Convert.ToString(dt.Rows[0]["ValueMember"]);
            //this.lookupEditFields.ItemIndex = 0;
        }

}

想取这行数据的DataType值：

string dataType = Convert.ToString(cboList.GetColumnValue("DataType"));

2、DevExpress.XtraEditors.ComboBoxEdit的基本用法

public void InitComboxEditou()
    {
        comboBoxOperator.Properties.Items.Clear();
        comboBoxOperator.Properties.Items.AddRange(new object[] {
                        "等于","大于","大于等于","小于","小于等于","不等于" });
        comboBoxOperator.EditValue = "等于";

    }