从两个表中获取 ComboBox 值

Question

我有两张桌子：

TblNum：

TblMaster：

---

TblMaster 与TblNum 有关系（NumID）

我有 1 个组合框，我想将数据值加载到我的组合框，方法是从 TblMaster 读取并从 TblNum 显示 Number。

实际上，我在加载表单上使用此代码：

    private void frmOrgChartsManage_Load(object sender, EventArgs e)
    {
        //Load ComboBox Source from MasterTable
        using (UnitOfWork db = new UnitOfWork())
        {
            // At first assign properties DisplayMember and ValueMember.
            cmbMaster.DisplayMember = "NumID";
            cmbMaster.ValueMember = "MasterID";

            // And then assign DataSource property of the cmbMaster.
            cmbMaster.DataSource = db.MasterRepository.Get();
        }
    }

使用此代码，我可以在我的组合框中看到 (1, 2, 3, 4, 5)

预期结果：

如何在我的DisplayMember 中加载Number01 , Number02 , Number03 , Number04 , Number05 而不是1, 2, 3, 4, 5？

编辑：
我需要从TblMaster 获取数据值并从TblNum 中查看名称

    cmbMaster.DisplayMember = "Number";
    cmbMaster.ValueMember = "MasterID";

我不知道如何为 1 个组合框从 2 个表中获取数据。

Answer 1

我想办法解决我的问题

为其他人编写代码，也许有人也有这个问题

private void frmOrgChartsManage_Load(object sender, EventArgs e)
{
    //Load ComboBox Source from MasterTable
    using (UnitOfWork db = new UnitOfWork())
    {
        // At first assign properties DisplayMember and ValueMember.
        cmbMaster.DisplayMember = "Number";
        cmbMaster.ValueMember = "MasterID";

        // And then assign DataSource property of the cmbMaster.
        var result = (from master in db.MasterRepository.Get()
                              join number in db.tblNumRepository.Get() on master.NumID equals number.NumID 


                              select new
                              {
                                  master.MasterID,
                                  number.Number,

                              }).ToList();
                cmbMaster.DataSource = result;
    }
}

Answer 2

把代码改成

private void frmOrgChartsManage_Load(object sender, EventArgs e)
        {
            //Load ComboBox Source from MasterTable
            using (UnitOfWork db = new UnitOfWork())
            {
                // At first assign properties DisplayMember and ValueMember.
                cmbLayerName.DisplayMember = cmbNumber.Where(x => x.NumID == "NumID").Select(y => y.Number).First();
                cmbLayerName.ValueMember = "MasterID";

                // And then assign DataSource property of the cmbMaster.
                cmbMaster.DataSource = db.MasterRepository.Get();
                cmbNumber.DataSource = db.NumberRepository.Get();

            }
        }

您正在绑定到 NumID，您需要在其中绑定到 Number