Convert string to double newbie question

[mp]

I tried looking in help for this but what it said didn't work

from help to cast from one type to another
//i = (int) d; // An explicit conversion, or "cast"

in my code i tried:
(tbDepth is a textbox on a form)

private double m_dDepth =0;
m_dDepth = (double)tbDepth.Text;

compile error
Cannot convert type 'string' to 'double'

how do i convert a string representing a double to a double?

thanks
Mark

 

[Konrad Neitzel]

Hi!

private double m_dDepth =0;
m_dDepth = (double)tbDepth.Text;

compile error
Cannot convert type 'string' to 'double'

how do i convert a string representing a double to a double?

m_dDepth = Double.Parse(tbDepth.Text);

With kind regards,

Konrad

 

[Mr. Arnold]

I tried looking in help for this but what it said didn't work

from help to cast from one type to another
//i = (int) d; // An explicit conversion, or "cast"

in my code i tried:
(tbDepth is a textbox on a form)

private double m_dDepth =0;
m_dDepth = (double)tbDepth.Text;

compile error
Cannot convert type 'string' to 'double'

how do i convert a string representing a double to a double?

You use the Convert statement which works with strings to convert it over to
a numeric value needed.

 

[Arne Vajhøj]

I tried looking in help for this but what it said didn't work

from help to cast from one type to another
//i = (int) d; // An explicit conversion, or "cast"

in my code i tried:
(tbDepth is a textbox on a form)

private double m_dDepth =0;
m_dDepth = (double)tbDepth.Text;

compile error
Cannot convert type 'string' to 'double'

how do i convert a string representing a double to a double?

double.Parse or possible even better double.TryParse!

Arne

 

[mp]

Konrad
Thank you for the response.
i think my help is not set up right in express - i find this online but not
in local
Thanks again,
Mark

 

[mp]

double.Parse or possible even better double.TryParse!

Arne

Thank you Arne!
mark

 

[mp]

You use the Convert statement which works with strings to convert it over
to
a numeric value needed.

Thank you Mr.Arnold!
Mark