How to add tooltip to user defined textbox on a winform

Question

I have a uvSelfLoadingTextBox with multiple instances on a form. I would like to load the tooltip with the _value property at run time.

I've tried

public ucSelfLoadingTextBox()
{
    Windows.Forms.ToolTip myToolTip;
    myToolTip.AutomaticDelay = 5000;
    myToolTip.AutoPopDelay = 50000;
    myToolTip.InitialDelay = 100;
    myToolTip.ReshowDelay = 500;

    myToolTip.SetToolTip(this, _value);

inside the control but that does not work.

I have tried using the tooltip that is dragged onto the form

    ucSelfLoadingLogicTextBox uc = new ucSelfLoadingLogicTextBox();
    toolTipA.SetToolTip(uc,uc._value );

and that does not work.

What is the correct way to do this?

Are you getting some kind of exception?

animaonline
– animaonline

2012-05-09 19:18:49 +00:00
Commented May 9, 2012 at 19:18 — animaonline
– animaonline, Commented May 9, 2012 at 19:18

Cristian Lupascu · Accepted Answer · 2012-05-09 19:30:26Z

2

You forgot to instantiate myToolTip. You need to set it to new Tooltip().

Also, I don't think it's a good practice to assign the tooltip in the textbox's constructor. You could do this in OnCreateControl() (that you need to override).

Your code could therefore become:

protected override void OnCreateControl()
{
    base.OnCreateControl();

    var myToolTip = new System.Windows.Forms.ToolTip
    {
        AutomaticDelay = 5000,
        AutoPopDelay = 50000,
        InitialDelay = 100,
        ReshowDelay = 500
    };

    myToolTip.SetToolTip(this, this.Text);
}

answered May 9, 2012 at 19:30

Cristian Lupascu

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3 Comments

Hunt Over a year ago

oops this works ok for this.Text at design time but it only shows the old value of the control e.g. text = designtime and the text value is changed by code to text = newvalue the tooltip still shows "designtime".

Hunt Over a year ago

Is there a way to make the control refresh do i need a onChange event of some sort?

Hunt Over a year ago

protected override void OnTextChanged(EventArgs e) Thanks wOlf got it working perfectly now thanks to your help.

David.Chu.ca · Accepted Answer · 2012-05-09 19:28:07Z

0

Many visible controls on windows form have ToolTip property. Just set the Tooltip with your newly created one. You can also add tooltip to your form. Have you tried this?

myToolTip.ShowAlways = true;

And try to set this tip to a button control. This may be a good test for your tooltip.

edited May 9, 2012 at 19:28

answered May 9, 2012 at 19:20

David.Chu.ca

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