No problem with your syntax Dmitry ... you just can't do it this way. You have two choices:

1) Concatenate the two columns into a third column in your Select when getting the data from the backend.

2) Use an expression to create the third calculated column:

this.oData.Columns.Add("MyConcatField");
this.oData.Columns["MyConcatField"].Expression = "MyField1 + MyField2";

~~Bonnie


>I would like to set .DataValueField of a DropDownList to a two concatenated fields. But I don't know the syntax.
>
>Here is an example of what works and what doesn't:
>
>

>MyDropDownList.DataValueField = "MyField1";  // this works
>MyDropDownList.DataValueField = "MyField1+MyField2" // this does not work
>MyDropDownList.DataValueField = "MyField1"+"MyField2" // Does not work
>
>

>
>Any suggestions to what is wrong with my syntax?
>
>Thank you.