CODEWITHSUNDEEP
c#winformslistbox
ViRALiC
ViRALiC

Reputation: 1549

Listbox not showing

So this is probably an easy one, but I have just started learning the subtle art of C#, so forgive me if I come across as a little 'green'.

I've been experimenting with boxes. ListBoxes as of late, to be precise. In my class I have the following:

ListBox lb = new ListBox();

lb.Location = new System.Drawing.Point(12, 12);
lb.Name = "ListBox1";
lb.Size = new System.Drawing.Size(245, 200);
lb.BackColor = System.Drawing.Color.Blue;
lb.ForeColor = System.Drawing.Color.Green;  

lb.Items.Add("Element One");
lb.Items.Add("Element Two");
lb.Items.Add("Element Two");

lb.Show();

Now, I've been working under the assumption that ListBox would somehow work as MessageBoxes do.

I have a:

var confirmResult = MessageBox.Show("Question asking about " + variable + "?", "TitleHere", MessageBoxButtons.YesNo);

...and I thought the ListBox would work much the same?

Problem is, it does not.

The MessageBox pops up in all its glory, but the ListBox is nowhere to be seen.

Am I missing something?

UPDATE:

Ok, so Form is the way to go they say.

I tried:

ListBox lb = new ListBox();

lb.Location = new System.Drawing.Point(12, 12);
lb.Name = "ListBox1";
lb.Size = new System.Drawing.Size(245, 200);
lb.BackColor = System.Drawing.Color.Blue;
lb.ForeColor = System.Drawing.Color.Green;  

lb.Items.Add("Element One");
lb.Items.Add("Element Two");
lb.Items.Add("Element Two");

Form f = new Form();
f.Controls.Add(lb);

Buuut this still isn't showing my pretty box.

Please advise.

Upvotes: 0

Views: 2478

Answers (2)

CoreMeltdown
CoreMeltdown

Reputation: 194

As written on Microsoft msdn, the message box:

Displays a message box that can contain text, buttons, and symbols that inform and instruct the user.

and the ListBox:

Represents a Windows control to display a list of items.

So you don't need a container (like Form) to display a messageBox, but you need one for Controls, like ListBox.

UPDATE:

You should probably also add something like: 

form.ShowDialog();

In addition to ListBox microsoft's page you should also check out one about Form class. They have neat examples if you scroll to the bottom of the page.

Upvotes: 1

Rick
Rick

Reputation: 841

You need to add the listbox to a container on your form (e.g. a panel or the form itself).

e.g.

MyForm.Controls.Add(lb)

or

panel1.Controls.Add(lb)

You don't need to do

lb.Show();

Upvotes: 3

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