CODEWITHSUNDEEP
c#.netwpfxamlcombobox
Elmo
Elmo

Reputation: 6471

Check if a ComboBox Contains Item

I have this:

<ComboBox SelectedValuePath="Content" x:Name="cb">
  <ComboBoxItem>Combo</ComboBoxItem>
  <ComboBoxItem>Box</ComboBoxItem>
  <ComboBoxItem>Item</ComboBoxItem>
</ComboBox>

If I use

cb.Items.Contains("Combo")

or

cb.Items.Contains(new ComboBoxItem {Content = "Combo"})

it returns False.

Can anyone tell me how do I check if a ComboBoxItem named Combo exists in the ComboBox cb?

Upvotes: 11

Views: 48064

Answers (3)

B.samu
B.samu

Reputation: 41

In C# Winform Apps You can do the following:

//Create a function like below

internal static bool CheckCombo(ComboBox.ObjectCollection items, string Search)
{
    bool isFound = false;
    foreach (var item in items)
    {
        if (item.Equals(Search))
        {
            isFound = true; break;
        }
    }
    return isFound;
}

You can call the function like this when adding your items to the combo box

if (!Functions.CheckCombo(Combobox.Items, "ValueToSearch"))
{
  //Adding the value if is not found in the combobox
  Combobox.Items.Add("ValueToSearch");
}

Upvotes: 0

Rohit Vats
Rohit Vats

Reputation: 81243

Items is an ItemCollection and not list of strings. In your case its a collection of ComboboxItem and you need to check its Content property.

cb.Items.Cast<ComboBoxItem>().Any(cbi => cbi.Content.Equals("Combo"));

OR

cb.Items.OfType<ComboBoxItem>().Any(cbi => cbi.Content.Equals("Combo"));

You can loop over each item and break in case you found desired item -

bool itemExists = false;
foreach (ComboBoxItem cbi in cb.Items)
{
    itemExists = cbi.Content.Equals("Combo");
    if (itemExists) break;
}

Upvotes: 16

Ming Slogar
Ming Slogar

Reputation: 2357

If you want to use the Contains function as in cb.Items.Contains("Combo") you have to add strings to your ComboBox, not ComboBoxItems: cb.Items.Add("Combo"). The string will display just like a ComboBoxItem.

Upvotes: 6

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