Question

With this code:

comboBoxCurrently.DataSource = PlatypusData.getCurrentlyVals();
comboBoxCurrently.Items.Remove("Surrounded by purplish-blue Penguins");

…I get, “System.ArgumentException was unhandled
Message=Items collection cannot be modified when the DataSource property is set.“

I don’t want to restrict the value I’m later removing from within the query (…WHERE bla <> ‘Surrounded…), because sometimes that value IS allowed (to display historical data), and I don’t really want to have a conditional statement in getCurrentlyVals() that uses either one query statement or the other (if there is a better way to do it).

Any ideas?

UPDATED

OK, this worked:

List<string> intermediateList = PlatypusData.getCurrentlyVals();
intermediateList.Remove("Surrounded by purplish-blue Penguins");
comboBoxCurrently.DataSource = intermediateList;

UPDATED AGAIN

I changed that to Lars’ way:

comboBoxCurrently.Items.AddRange(PlatypusData.getCurrentlyVals().ToArray());
comboBoxCurrently.Items.Remove("Surrounded by purplish-blue Penguins");

…and I reckon this page has more intances of the string “Surrounded by purplish-blue Penguins” than any page in the history of mankind, past or future.

Answer 1

You would have to modify the collection from the DataSource, but you seem to be against doing that, so in that case, don’t use a DataSource, but try adding the items to the ComboBox directly:

comboBoxCurrently.Items.AddRange(PlatypusData.getCurrentlyVals().ToArray());
comboBoxCurrently.Items.Remove("Surrounded by purplish-blue Penguins");