C# - Populating An Asp:dropdownlist From Multiple Tables In A SQL Database?

Dec 22, 2009

I have 4 tables: CustomerDocument, CustomerLink, CustomerAdditionalInfo, and CustomerImage. They each have a value of CustomerNumber, and I need to way to pull the customer numbers from each table and put in a drop down list. I know how to do it with one table, but not multiple. Also, there is a restriction that the CustomerNumber needs to be not null, so do I need to include this with each join? Here is a bit of code I have now. oDb is the DataContext

var oData = from c in oDb.CustomerAdditionalInfos
where ( c.CustomerID == CustomerID &&
c.CustomerNumber != null &&
c.CategoryID == CategoryID )
orderby c.CustomerNumber
select new { c.CustomerNumber };
return oData;

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