以编程方式将静态项添加到下拉列表LINQ

Question

我正在绑定一个像这样的radcombobox

    _ddActQuota.DataTextField = "DESC";
    _ddActQuota.DataValueField = "ID";

    _ddActQuota.DataSource = LNQ.tbl_job_quotas.Where(c => c.job_quota_job_number == _fJ).Select(c => new { ID = c.job_quota_ID, DESC = c.job_quota_ID + " | " + c.job_quota_desc });
    _ddActQuota.DataBind();

如何添加ID =“%%”的初始值DESC =“ALL”。在标记中执行此操作在此实例中不起作用。

Answer 1

    var LNQ = new LNQDataContext();

    var quo = LNQ.tbl_job_quotas.Where(c => c.job_quota_job_number == _fJ).Select(c => new { ID = c.job_quota_ID, DESC = c.job_quota_ID + " | " + c.job_quota_desc });
    var DtQu = new DataTable();
    DtQu.Columns.Add("ID");
    DtQu.Columns.Add("DESC");

    DataRow drs;
    drs = DtQu.NewRow();
    drs[0] = "%%";
    drs[1] = "ALL";
    DtQu.Rows.Add(drs);

    foreach (var a in quo)
    {
        drs = DtQu.NewRow();
        drs[0] = a.ID;
        drs[1] = a.DESC;
        DtQu.Rows.Add(drs);
    }

    _ddActQuota.DataTextField = "DESC";
    _ddActQuota.DataValueField = "ID";

    _ddActQuota.DataSource = DtQu;
    _ddActQuota.DataBind();