C# linq的作用域标识

您希望如何在TODO语句中使用像linq的作用域标识这样的过程

    protected void btnAdd_Click(object sender, EventArgs e)
    {
        if (txtZip.Text != "" && txtAdd1.Text != "" && txtCity.Text != "")
        {
            TestDataClassDataContext dc = new TestDataClassDataContext();
            Address addr = new Address()
            {
                AddressLine1 = txtAdd1.Text,
                AddressLine2 = txtAdd2.Text,
                City = txtCity.Text,
                PostalCode = txtZip.Text,
                StateProvinceID = Convert.ToInt32(ddlState.SelectedValue)
            };
            dc.Addresses.InsertOnSubmit(addr);
            lblSuccess.Visible = true;
            lblErrMsg.Visible = false;
            dc.SubmitChanges();
     //
     //    TODO: insert new row in EmployeeAddress to reference CurEmp to newly created address
     //
            SetAddrList();
        }
        else
        {
            lblErrMsg.Text = "Invalid Input";
            lblErrMsg.Visible = true;
        }
    }

    protected void SetAddrList()
    {
        TestDataClassDataContext dc = new TestDataClassDataContext();
        dc.ObjectTrackingEnabled = false;

        var addList = from addr in dc.Addresses
                      from eaddr in dc.EmployeeAddresses
                      where eaddr.EmployeeID == _curEmpID && addr.AddressID == eaddr.AddressID
                      select new
                      {
                          AddValue = addr.AddressID,
                          AddText = addr.AddressID,
                      };
        ddlAddList.DataSource = addList;
        ddlAddList.DataValueField = "AddValue";
        ddlAddList.DataTextField = "AddText";
        ddlAddList.DataBind();
        ddlAddList.Items.Add(new ListItem("<Add Address>", "-1"));
    }

protectedvoidbtnadd\u单击（对象发送者，事件参数e）
{
if（txtZip.Text！=“”&&txtAdd1.Text！=“”&&txtCity.Text！=“”）
{
TestDataClassDataContext dc=新的TestDataClassDataContext（）；
地址addr=新地址（）
{
AddressLine1=txtAdd1.Text，
AddressLine2=txtAdd2.Text，
City=txtCity.Text，
PostalCode=txtZip.Text，
StateProvinceID=Convert.ToInt32（ddlState.SelectedValue）
};
dc.Addresses.InsertOnSubmit（地址）；
lblSuccess.Visible=true；
lblErrMsg.Visible=false；
dc.提交更改（）；
//
//TODO:在EmployeeAddress中插入新行以将CurEmp引用到新创建的地址
//
SetAddrList（）；
}
其他的
{
lblErrMsg.Text=“输入无效”；
lblErrMsg.Visible=true；
}
}
受保护的void SetAddrList（）
{
TestDataClassDataContext dc=新的TestDataClassDataContext（）；
dc.ObjectTrackingEnabled=false；
var addList=来自dc地址中的addr
来自华盛顿特区的eaddr。员工地址
其中eaddr.EmployeeID==\u curEmpID&&addr.AddressID==eaddr.AddressID
选择新的
{
AddValue=addr.AddressID，
AddText=addr.AddressID，
};
ddlAddList.DataSource=addList；
ddlAddList.DataValueField=“AddValue”；
ddlAddList.DataTextField=“AddText”；
ddlAddList.DataBind（）；
ddlAddList.Items.Add（新列表项（“，”-1”）；
}

您可以将其作为参数传递给SetAddrList void，然后您就可以访问该对象的所有属性，包括新创建的主键

SetAddrList(addr);

...
...

protected void SetAddrList(Address addr)

---

好的，我已经弄明白了，我不确定这是不是那么简单

不确定这个答案在编辑问题后是否适用？

    protected void btnAdd_Click(object sender, EventArgs e)
    {
        if (txtZip.Text != "" && txtAdd1.Text != "" && txtCity.Text != "")
        {
            TestDataClassDataContext dc = new TestDataClassDataContext();
            Address addr = new Address()
            {
                AddressLine1 = txtAdd1.Text,
                AddressLine2 = txtAdd2.Text,
                City = txtCity.Text,
                PostalCode = txtZip.Text,
                StateProvinceID = Convert.ToInt32(ddlState.SelectedValue)
            };
            dc.Addresses.InsertOnSubmit(addr);

            dc.SubmitChanges();
            int nAddID = addr.AddressID;
            EmployeeAddress empadd = new EmployeeAddress()
            {
                EmployeeID = Convert.ToInt32(_curEmpID),
                AddressID = nAddID
            };
            dc.EmployeeAddresses.InsertOnSubmit(empadd);
            dc.SubmitChanges();
            lblSuccess.Visible = true;
            lblErrMsg.Visible = false;
            SetAddrList();
        }
        else
        {
            lblErrMsg.Text = "Invalid Input";
            lblErrMsg.Visible = true;
        }
    }