How to refresh all items in ListBox

Asked Aug 19 '15 at 08:13

Active Aug 19 '15 at 08:23

Viewed 93 times

Why does the following code gives me only one row with text "3" after 5 seconds?

        var data = new Dictionary<string, Foo>();
        data.Add("foo", new Foo { bar = "1" });

        Invoke((MethodInvoker)delegate()
        {
            listBox.DataSource = new BindingSource(data, null);
            listBox.DisplayMember = "Value";
            listBox.ValueMember = "Key";
        });

        Thread.Sleep(5000);

        data["foo"].bar = "3";
        data.Add("bar", new Foo { bar = "2" });

        Invoke((MethodInvoker)delegate()
        {
            listBox.DisplayMember = "";
            listBox.DisplayMember = "Value";
        });

How can I display all elements and their changes correctly?

None of the suggested solutions from here helped me.

edited May 23 '17 at 12:06

Community

asked Aug 19 '15 at 08:13

FrozenHeart

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@Sinatr "What is expected behavior?" -- two lines after 5 seconds ("2" and "3"). "Why you have Sleep in UI thread?" -- for demonstrational purposes. And this is not UI thread – FrozenHeart Aug 19 '15 at 08:20
@Sinatr None of the suggested solutions helped me – FrozenHeart Aug 19 '15 at 08:22
1

Reassigning datasource works. Do that `listBox.DataSource = new BindingSource(data, null);` in second `Invoke`. – Sinatr Aug 19 '15 at 08:29
@Sinatr Yep, thanks a lot – FrozenHeart Aug 19 '15 at 08:33

How to refresh all items in ListBox

0 Answers0