Hello!

I writing a win form calculator but I just wonder if I can do something to
prevent to get this E notation.
For example if I enter 0.000001 on my calculator my using the Buttons that
my calculator uses as buttons I get
-1E-06 when hit the +/- button this causes problem if I add more figures
than I get -1E-06000 and this
is not valid.
Below can you see my event handler that is called when the +/- button is hit
and some of the other methods that is relevant in this example. My TextBox
field on the form is called txtDisplay.

private void btnNeg_Click(object sender, EventArgs e)
{
if (txtDisplay.Text.Length > 0)
{
SetTextValue((ParseUsingDecimalPoint()
* -1).ToString(CultureInfo.InvariantCulture));
}
}

private double ParseUsingDecimalPoint()
{
return double.Parse(txtDisplay.Text, CultureInfo.InvariantCulture);
}

private void SetTextValue(string textValue)
{
txtDisplay.Text = textValue;
}

//Tony

Use a decimal value type


"Tony Johansson" <(E-Mail Removed)> wrote in message
news:_2nDl.7721$(E-Mail Removed)...
> Hello!
>
> I writing a win form calculator but I just wonder if I can do something to
> prevent to get this E notation.
> For example if I enter 0.000001 on my calculator my using the Buttons that
> my calculator uses as buttons I get
> -1E-06 when hit the +/- button this causes problem if I add more figures
> than I get -1E-06000 and this
> is not valid.
> Below can you see my event handler that is called when the +/- button is
> hit and some of the other methods that is relevant in this example. My
> TextBox field on the form is called txtDisplay.
>
> private void btnNeg_Click(object sender, EventArgs e)
> {
> if (txtDisplay.Text.Length > 0)
> {
> SetTextValue((ParseUsingDecimalPoint()
> * -1).ToString(CultureInfo.InvariantCulture));
> }
> }
>
> private double ParseUsingDecimalPoint()
> {
> return double.Parse(txtDisplay.Text, CultureInfo.InvariantCulture);
> }
>
> private void SetTextValue(string textValue)
> {
> txtDisplay.Text = textValue;
> }
>
> //Tony
>

Tony Johansson wrote:
> Hello!
>
> I writing a win form calculator but I just wonder if I can do
> something to prevent to get this E notation.
> For example if I enter 0.000001 on my calculator my using the Buttons
> that my calculator uses as buttons I get
> -1E-06 when hit the +/- button this causes problem if I add more
> figures than I get -1E-06000 and this
> is not valid.
> Below can you see my event handler that is called when the +/- button
> is hit and some of the other methods that is relevant in this
> example. My TextBox field on the form is called txtDisplay.
>
> private void btnNeg_Click(object sender, EventArgs e)
> {
> if (txtDisplay.Text.Length > 0)
> {
> SetTextValue((ParseUsingDecimalPoint()
> * -1).ToString(CultureInfo.InvariantCulture));

ToString accepts an additional argument that controls the formatting.
http://msdn.microsoft.com/en-us/library/aa326794(loband).aspx
http://msdn.microsoft.com/en-us/library/dwhawy9k(loband).aspx

> }
> }
>
> private double ParseUsingDecimalPoint()
> {
> return double.Parse(txtDisplay.Text, CultureInfo.InvariantCulture);
> }
>
> private void SetTextValue(string textValue)
> {
> txtDisplay.Text = textValue;
> }
>
> //Tony

Hello!

It worked fine when using decimal instead of double.

//Tony

"Cor Ligthert[MVP]" <(E-Mail Removed)> skrev i meddelandet
news:(E-Mail Removed)...
> Use a decimal value type
>
>
> "Tony Johansson" <(E-Mail Removed)> wrote in message
> news:_2nDl.7721$(E-Mail Removed)...
>> Hello!
>>
>> I writing a win form calculator but I just wonder if I can do something
>> to prevent to get this E notation.
>> For example if I enter 0.000001 on my calculator my using the Buttons
>> that my calculator uses as buttons I get
>> -1E-06 when hit the +/- button this causes problem if I add more figures
>> than I get -1E-06000 and this
>> is not valid.
>> Below can you see my event handler that is called when the +/- button is
>> hit and some of the other methods that is relevant in this example. My
>> TextBox field on the form is called txtDisplay.
>>
>> private void btnNeg_Click(object sender, EventArgs e)
>> {
>> if (txtDisplay.Text.Length > 0)
>> {
>> SetTextValue((ParseUsingDecimalPoint()
>> * -1).ToString(CultureInfo.InvariantCulture));
>> }
>> }
>>
>> private double ParseUsingDecimalPoint()
>> {
>> return double.Parse(txtDisplay.Text, CultureInfo.InvariantCulture);
>> }
>>
>> private void SetTextValue(string textValue)
>> {
>> txtDisplay.Text = textValue;
>> }
>>
>> //Tony
>>
>