c# Add/Delete Created User Controls on a form

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Hi,

I'm new to c# and i would like to make a windows form that consist of a NumericUpDown and a button for add/delete user control,
i was able to add one user control with the below code

C#

private void btnCounter_Click(object sender, EventArgs e)
        {
            UserControlLibelle myUserControl = new UserControlLibelle();
            myUserControl.Location = new Point(iPositionInitiale_X, iPositionInitiale_Y + (1 * iEcartEntre2UserCOntrols));
            myUserControl.Name = "UserControl_100";
            myUserControl.Size = new System.Drawing.Size(284, 161);
            myUserControl.TabIndex = 100;
            this.Controls.Add((myUserControl));
        }

can you please help me to add/delete several user control,

thanks in advance

Posted 11-Dec-13 23:14pm

Member 10414026

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BillWoodruff 12-Dec-13 6:49am

What is the relationship of the NumericUpDown Control to your UserControls ? Does it specify the number of the UserControl you want deleted if you Click the delete button ?

Please give more detail.

Member 10414026 12-Dec-13 7:09am

The numericUpDown is just for help the user choose how many usercontrols he will add or delete and after that he need to click the button,
thank you

BillWoodruff 12-Dec-13 8:48am

So, if the user sets the value of the NumericUpDown to 5, and there are 10 UserControls, and the user hits the Delete Button: what determines which UserControls get deleted ?

Sadique KT 12-Dec-13 7:19am

Add dock panel then add usercontrol to the panel

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BillWoodruff · Answer 1 · 2013-12-12T03:26:00

Here's a general solution of adding and deleting UserControls based on the current value of a NumericUpDown Control. There are two Buttons, btnAdd, and btnDelete.

You can modify the code in the loops inside the Click EventHandlers for the two Buttons to do what you want to do:

C#

private int nOfUserControls;

private void btnAdd_Click(object sender, EventArgs e)
{
    for (int i = 0; i < nOfUserControls; i++)
    {
        AUserControl newUserControl = new AUserControl();

        // set the UserControl instance Button's Text
        newUserControl.ucButton.Text = "button " + i.ToString();

        // set the UserControl Location
        // using the loop index variable
        // to position the UserControl vertically
        newUserControl.Location = new Point(10, ((i + 1) * 40));

        // add the new UserControl to the Panel's
        // Control Collection
        pnlUCContainer.Controls.Add(newUserControl);
    }
}

private void btnDelete_Click(object sender, EventArgs e)
{
    // avoid out-of-range error
    if (nOfUserControls > pnlUCContainer.Controls.Count)
    {
        nOfUserControls = pnlUCContainer.Controls.Count;
        numericUpDown1.Value = nOfUserControls;
    }

    for (int i = 0; i < nOfUserControls; i++)
    {
        pnlUCContainer.Controls.RemoveAt(0);
    }
}

private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
    nOfUserControls = Convert.ToInt32(numericUpDown1.Value);
}

The very simple UserControl used here has only a Button on it:

C#

public partial class AUserControl : UserControl
{
    public AUserControl()
    {
        InitializeComponent();
        ucButton = button1;
    }

    // expose the Button Control so creators
    // of the Control can set its Properties
    // or EventHandlers
    public Button ucButton { get; private set; }
}