CODEWITHSUNDEEP
c#
dmoening
dmoening

Reputation: 23

Assume variable = 0 if textbox is empty C#

This may be the incorrect way of asking this but I need to figure out how to have the value that I am parsing in from a textbox to be 0 if it is left blank.

I have two textbox's (LaborCharge & PartsCharge)

the user does not need to enter in a value for the charges. Assuming that they left one of both of the textboxes blank, I want the value that I am parsing out of the textbox to = 0 so I can use it to calculate a total for labor and parts.

Thanks!

Upvotes: 2

Views: 2599

Answers (3)

Yariv Doron
Yariv Doron

Reputation: 1

You can always set a default value of 0 to each TextBox you create. this way you don't have to deal with a null value, which sometimes causes some difficulties if you don't pay attention (late night programming...).

I find that users usually don't mind 0 values in empty boxes, and it is much easier later on to write:

if(TextBox.Text = "0")
 // enter your code in here

Upvotes: 0

Mark Hall
Mark Hall

Reputation: 54532

compare the TextBox's Values with String.IsNullOrEmpty or if you are running .Net 4.0 String.IsNullOrWhiteSpace would be better suited for you.

        if (String.IsNullOrEmpty(LaborCharge.Text))
            //Set your variable to zero
        else
           //Process your code

Upvotes: 2

BradleyDotNET
BradleyDotNET

Reputation: 61339

Use something like the following:

int charge = 0;
int.TryParse(LaborCharge.Text, out charge);
...

Try parse will set charge to zero if the conversion fails due to the string being null, empty or not containing a number. (MSDN)

Upvotes: 10

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