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MVC - combining two field in a drop down from joint table

I have a table that has 2 foreign key. I would like to create in drop down that contain the value of these two foreign key. How
can I do that?

Here is my table definition:

Master Table
Id INT Prinary key
PhoneNumber VARCHAR(3)
IDLocation Foreign key to location table
IDDepartment Foreign Key to Department table

Master Table with data exammpe:

Location Table
ID Primary key but this is related to the IDLocation Foreign key in Master table
Location Varchar

Location Table with example.

Department Table
ID Primary key but this is relate to the ID Department foreng Key in Master table
Department varchar

So in my drop down I would like  something like this.

Please choose
Chicago - Clothes
or "Value"  - "value"
1 Solution
Mike EghtebasDatabase and Application DeveloperCommented:
Set the following properties as shown below:

cmbBox.DataTextField = "Diaplay"           // for "Chicago - Clothes"
cmbBox.DataValueField = "BothFKs"       // for "1|1"

You could concatenate them in your Select statement:
   m.IDLocation + '|' + m.IDDepartment As BothFKs
   , l.Location + '-' + d.Department As Diaplay
   From [Master Table] m
   Inner Join [Location Table] l 
   on m.IDLocation = l.IDLocation
   Inner Join [Department Table] d 
   on m.IDDepartment = d.IDDepartment 

Open in new window

This will produce:

1|1 and  Chicago - Clothes
^-- value           ^--display

Most likely, you need to use CAST() like, apply it if it errors:

Cast(m.IDLocation as varchar(5)) + '|' + Cast(m.IDDepartment as varchar(5))  As BothFKs

cmbBox.SelectedItem.Text -->  "Chicago - Clothes"
cmbBox.SelectedItem.Value --> "1|1"
cmbBox.SelectedIndex --> 0 ,1, 2, ...
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