Comparing parsed value

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Hi All,

I am experiencing an odd problem with trying to compare a value from a text box

I have used the following code but cannot find a way to get the expected outcome as if the text box value is a decimal 3.5 etc it will always enter the if statement.

C#

// Ensure text box is kept bellow the maximum value of an overrun
decimal maxOverrun = 15;
if (Decimal.Parse(tbOverrun.Text) > maxOverrun)
{
    tbOverrun.Text = "15";
}

thanks George

Posted 28-Jul-11 0:48am

grwithey

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Amund Gjersøe 28-Jul-11 6:59am

Thats strange. Do you do the test in the Validating-event? And just curious: Do you use the datatype decimal because you want to accept decimals in the textbox? Decimal is a 128-bit floating-point datatype, and the double datatype is more common.

grwithey 28-Jul-11 8:05am

I was testing this upon leaving a text box.

There was no reson for the decimal in this case other than experimentation of different types to see if they worked.

There was a different problem here if i enter "1.5" it will convert this value to "15" as it is in German. I cannot figure out how to overcome this issue. it will work fine with a "," instead of a "."

Thanks George

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Wayne Gaylard · Accepted Answer · 2011-07-28T01:02:00

Solution 1

You should cast the text value first before you compare, something like this:

C#

decimal maxOverrun = 15;
            decimal userValue;
            decimal.TryParse(tbOverrun.Text, out userValue);
            if (userValue > maxOverrun)
            {
                //Do stuff here
            }

Hope this helps

Posted 28-Jul-11 1:02am

Wayne Gaylard

Comments

grwithey 28-Jul-11 7:07am

I think this should normally work however if i enter 1.321 in the text box the user value is set to "1321" which must be why it was entering the if.

I do have my pc set to German currently which may have something to do with it

grwithey 28-Jul-11 7:09am

Yes it was because it was in German, if i replace the "." with a "," it works fine. Thanks Wayne for the answer.

Wayne Gaylard 28-Jul-11 7:19am

Glad you got it sorted.