CODEWITHSUNDEEP
c#xamllistview
PhoenixFirenzy
PhoenixFirenzy

Reputation: 57

C# Error Finding Item in ListView

I'm trying to search a ListView to see if a certain piece of text has already been added. I've tried using other answers from here, like the code below:

ListViewItem item = ListView1.FindItemWithText(txtSearch.Text);
if (item != null)
{
   // you have match
}

However, it highlights a problem with "FindItemWithText". The error message is:

'Windows.UI.Xaml.Controls.ListView' does not contain a definition for 'FindItemWithText' and no extension method 'FindItemWithText' accepting a first argument of type 'Windows.UI.Xaml.Controls.ListView' could be found (are you missing a using directive or an assembly reference?).

I'm using Visual Studio 2013 to create a Windows Phone 8.1 app.

Any help would be appreciated!

Upvotes: 2

Views: 628

Answers (2)

Matthew North
Matthew North

Reputation: 555

How about using some LINQ

if(listView.Items.Cast<ListViewItem>().Any(c => c.Content.ToString().Contains(txtSearch.Text)))
{
    // You have a match
}

Upvotes: 0

EngineerSpock
EngineerSpock

Reputation: 2675

For example you can implement an extension method which will do what you want. Consider a stupid example:

public static class ListViewExtensions {
    public static object FintItemWithText(this ListView lv, string text) {
        foreach (ListViewItem item in lv.Items) {
            if (item.Content.ToString() == text) {
                return item;
            }
        }
        return null;
    }
}

Now, you can use it like in the following example:

object result = listView.FintItemWithText("A");

I just here work with objects. It's not a good practice usually. Maybe it would be better to roll out your own class, create a list (or ObservableCollection) of it and set a binding. Than, when you know the type of items inside your ListView you can easily cast to the well known type and check it's properties as you like.

Upvotes: 1

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