How to declare a constructor?

Question

I get the following error when I compile the program

\"Microsoft.Samples.Kinect.ControlsBasics.SelectionDisplay\' does not contain a constructor that ta

Answer 1

You should create an overload of SelectionDisplay's contructor or change the one you already have. Like this:

public SelectionDisplay(string itemId, string tag)
{
    //Do something here
}

Due to you're creating a new instance of SelectionDisplay with two arguments, but its constructor only accept one argument. (string itemId):

//foreach
new SelectionDisplay(button.Label as string, button.Tag as string); //

//KinectTileButtonClick method
new SelectionDisplay(button.Label, button.Background);

You have to check what type button.Label, button.Tag and button.Background are and create a new constructor with these values.

You can read more about Constructors here

Answer 2

You have error in two lines:

var selectionDisplay = new SelectionDisplay(button.Label as string, button.Tag as string);

and

var selectionDisplay = new SelectionDisplay(button.Label, button.Background); 

and you define the constructor as

public SelectionDisplay(string itemId)
    {
        this.InitializeComponent();

        this.messageTextBlock.Text = string.Format(CultureInfo.CurrentCulture,Properties.Resources.SelectedMessage,itemId);

    }

if you need to define with some default value then you need to do like this

public SelectionDisplay(string itemId, string nextParam="default value")
    {
        this.InitializeComponent();

        this.messageTextBlock.Text = string.Format(CultureInfo.CurrentCulture,Properties.Resources.SelectedMessage,itemId);

    }

In this case you can either pass next argument or ignore it

Answer 3

Well, you've already created a constructor that takes one argument:

public SelectionDisplay(string itemId)
{
    //...
}

But you're passing it two arguments:

new SelectionDisplay(button.Label as string, button.Tag as string);

You can add an argument to the constructor you have, or create a new one:

public SelectionDisplay(string itemId, string someOtherValue)
{
    //...
}