Clearing Multiple TextBoxes in C#

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bernden - 23 Jul 2004 13:45 GMT

Good Morning

I am working on a C# project that has a form which contains multiple
columns of 10 textBoxes in seperate groupBoxes on a tabControl.
When the form loads, I would like to make sure that text property of each
individual textBox is set to "0.00" .
When the form closes, I would like to ensure that the text property of ALL
textboxes is re-set to "null" or " " .

Is there a way to do this without having to list each textBox and set its
text property individually ?

Any help / insight would be appreciated.

Dennis

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Tim Wilson - 23 Jul 2004 13:55 GMT

You should be able to adapt the recursive code at the link below.
http://www.google.ca/groups?hl=en&lr=&ie=UTF-8&selm=%23o4DxjF4DHA.2332%40TK2MSFT
NGP10.phx.gbl

Signature

Tim Wilson
.Net Compact Framework MVP

> Good Morning
>
[quoted text clipped - 11 lines]
>
> Dennis

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bernden - 23 Jul 2004 16:30 GMT

Good Morning Tim

Thank you for that quick and timely reply.
I tried it out and it worked like a charm. In fact it worked so well that I
adjusted it to suit the needs of specific events
within my little program and they did the job perfectly.
Here is an example of those adjustments. Perhaps another C# novice like
myself can benefit from your assistance as I did.

sample
private void cboxS1_Checked(object sender, System.EventArgs e)
{
foreach(Control ctrl in this.gboxStdS1.Controls)
{
if (ctrl is TextBox)
((TextBox)ctrl).Text = "0.00" ;
}

Thanks again
Dennis

> You should be able to adapt the recursive code at the link below.

http://www.google.ca/groups?hl=en&lr=&ie=UTF-8&selm=%23o4DxjF4DHA.2332%40TK2MSFT
NGP10.phx.gbl

> > Good Morning
> >
[quoted text clipped - 11 lines]
> >
> > Dennis

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Rob Styles - 26 Jul 2004 21:49 GMT

A more encapsulated approach is to make the textbox itself responsible
for setting and resetting its values - by inheriting and changing the
TextBox behaviour.

First create a new type of Control:

/// <summary>
/// CustomTextBox takes responsibility for
/// initialising and resetting itself.
/// </summary>
public class CustomTextBox : System.Windows.Forms.TextBox
{
    private void SetToNull(object sender, EventArgs eventArgs)
    {
        Text = string.Empty;
    }

    protected override void OnCreateControl()
    {
        base.OnCreateControl();
        Text = "0.00";
        Form form = FindForm();
        form.Closed += new EventHandler(SetToNull);
    }
}

Then change the codebehind of the form to use the custom textbox:

private void InitializeComponent()
{
    ...
    this.textBox1 = new CustomTextBox();
    ...
}

That way there's no risk of you changing other text boxes by mistake.

rob styles

> Good Morning
>
[quoted text clipped - 11 lines]
>
> Dennis

Reply to this Message

Clearing Multiple TextBoxes in C#

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