C# – dropdownlist items find by partial value

To find an item (and select it) in a dropdownlist using a value we simply do

dropdownlist1.Items.FindByValue("myValue").Selected = true;

How can I find an item using partial value? Say I have 3 elements and they have values “myValue one”, “myvalue two”, “myValue three” respectively. I want to do something like

dropdownlist1.Items.FindByValue("three").Selected = true;

and have it select the last item.

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Best Solution

You can iterate from the end of the list and check if value contains the item (this will select the last item which contains value “myValueSearched”).

 for (int i = DropDownList1.Items.Count - 1; i >= 0 ; i--)
        {
            if (DropDownList1.Items[i].Value.Contains("myValueSearched"))
            {
                DropDownList1.Items[i].Selected = true;
                break;
            }
        }

Or you can use linq as always:

DropDownList1.Items.Cast<ListItem>()
                   .Where(x => x.Value.Contains("three"))
                   .LastOrDefault().Selected = true;

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