Using DB screen field values in Calculations

[mushin]

I'm a bit new to .Net and am perplexed by some unwarranted
complexity.

dim d as datetime
dim dur as int

d = datetimepickr1.value.
datetimepicker2.value = d.addminutes(30).

This works ok, but now I want to use the contents on myField
in place of the hard coded value of 30.

I have a db field (myField) of type INT.
On my Screen I display myField.text.

When I change the value a calculation occurs with a date.

datetimepicker2.value = d.addminutes(myField).

I have tried to convert myField to an int but the calc still
protests.

dim Dur as int32
dur = convert.toint32(myField.text)
datetimepicker2.value = d.addminutes(myField).

error *** "input string was not in correct format"

I tried this as a 'double' to no avail.......

What gives ? Anyone ?

 

[mushin]

If I turn 'option Stict' off

I can perform my calcs just fine,
so It is just a conversion issue.
????

 

[mushin]

Ok, Ignore me today......

The conversion works as in :

Dim d As DateTime
Dim myDur As Double

If tbDuration.Text > " " Then
d = DateTimePicker1.Value
myDur = Convert.ToDouble(tbDuration.Text)
DateTimePicker2.Value = d.AddMinutes(myDur)
End If