[RESOLVED] [2005] Conversion from string to type Double

Is it possible to convert the String from the text box to type Double?

Code:

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price = CType(txtPrice.Text, Double)

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This code does'nt work when the txtPrice.Text is empty. Sometimes I need to leave this txtPrice.Text as blank. If it is not possible to leave the said textbox as blank just let me know!

Thanks in Advance!

It's possible to convert a valid string representation of a number to a Double but if the string doesn't represent a number then what conversion could be made? If there's a chance that the string may be invalid then use the TryParse method the type you're converting to:

vb Code:

Dim price As Decimal
 
If Decimal.TryParse(txtPrice.Text, price) Then
    'The conversion was successful and the "price" variable contains the number.
Else
    'The conversion failed.
End If

Note that I used Decimal instead of Double. It will work with Double too but it is generally preferable to use Decimal for currency values as there is no risk of round-off errors.

Thanks jmcilhinney!