将数据源分配给枚举时，如何从组合框中删除项目？

Question

How to remove an Item from a combobox when a datasource is assigned to an enum?

When trying to remove by Items.Remove , got error:

Items collection cannot be modified when the DataSource property is set.

Any suggestion?

Note: I would keep using the enum because I deal it in many places in the code.

---

The code:

public enum DefaultValueType
{
    None = 0,
    Static = 1,
    Query = 2
}

cBoxDefaultType.DataSource = Enum.GetValues(typeof(DefaultValueType));

In one case, I want to remove the Query item from the options of the combobox.

cBoxDefaultType.Items.RemoveAt(2); // Throw exception

Answer 1

I found the solution by filtering the array of Enumeration:

Enum.GetValues(typeof(DefaultValueType))
    .Cast<DefaultValueType>()
    .Where(p => p != DefaultValueType.Query)
    .ToArray<DefaultValueType>()

Answer 2

You need to remove item from DataSource and rebind or use just .Items without DataSource

In your case you need to convert Enum to array and then work with it.

Answer 3

Also for .NET 2.0 (Remove 'Invalid' item from enum 'SomeEnum'):

comboBox1.DataSource = Array.FindAll((SomeEnum[])Enum.GetValues(typeof(SomeEnum)),
(SomeEnum SM) => { return SM != SomeEnum.Invalid; });