如何显示组合了2个不同属性的dropdownlist datavaluefield？

Question

I have a table in SQL :

WarehouseAddress(addressID, address1, address2, etc.)

How can i display the datavaluefield in my dropdownlist as a combination of address1 + address2 separated by a comma?

This is my current aspx.cs code:

//reading the data from SQL
    deliveryAddressDdl.DataSource = warehouseAddressDB.getShippingAddresses(uid, wid);

//setting the data to be displayed in the dropdownlist
    deliveryAddressDdl.DataTextField = "address1";

//setting the value inside the dropdownlist when selected
    deliveryAddressDdl.DataValueField = "addressID";
    deliveryAddressDdl.DataBind();

I have tried using:

deliveryAddressDdl.DataTextField = "address1" + ", " + "address2";

But it just simply searches for the value "address1, address2" in sql, which simply does not exist in my WarehouseAddress table.

Thank you very much in advance for any kind of help!

Answer 1

you can combine that from your SQL statement and give it a column name address. see below example of code rewritten from your code.

SQL Query:

SELECT addressID, address1 + ' , ' + address2 AS Address FROM WarehouseAddress

Change in Source code for DataTextField:

 //reading the data from SQL
 deliveryAddressDdl.DataSource = warehouseAddressDB.getShippingAddresses(uid, wid);

//setting the data to be displayed in the dropdownlist
deliveryAddressDdl.DataTextField = "Address";

//setting the value inside the dropdownlist when selected
deliveryAddressDdl.DataValueField = "addressID";
deliveryAddressDdl.DataBind();

Answer 2

The answer to the question I asked earlier would be:

aspx.cs:

//reading the data from SQL
    deliveryAddressDdl.DataSource = warehouseAddressDB.getShippingAddresses(uid, wid);

//setting the data to be displayed in the dropdownlist
    deliveryAddressDdl.DataTextField = "combinedAddress";

//setting the value inside the dropdownlist when selected
    deliveryAddressDdl.DataValueField = "addressID";
    deliveryAddressDdl.DataBind();

SQL:

select *, (address1 + ',' + SPACE(1) + address2) as combinedAddress from WarehouseAddress