Problem using TryParse and NumbericUpDown

[ADO DOT NET]

I always get invalid number error while using this:

       Dim MyRes As Boolean
       Dim MyInt As Integer = Integer.TryParse(NumericUpDown1.Value, MyRes)
       If MyInt < 1 Or MyInt > 65535 Then
           MsgBox("invalid number")
       End If

I am using VB.NET 2005, .NET Framework 2.0.

WindowsApplication1.zip

[Nerseus]

I believe you've got your Boolean and Integer swapped.

Try this:

Dim MyInt As Integer
       Dim MyRes As Boolean = Integer.TryParse(NumericUpDown1.Value, MyInt)
       If MyInt < 1 Or MyInt > 65535 Then
           MsgBox("invalid number")
       End If

 

The second param to TryParse is the parsed integer value. The return of the function is true/false on whether the parsing worked.

 

Also, it looks like you want to parse a short integer. Maybe replace Integer with UShort above. Then you'd only have to check against 0 (if that's an invalid value for you). Just an observation, not critical to your question.

 

-ner

[PlausiblyDamp]

Just to add - putting

Option Strict On

at the top of your source files will catch a lot of these mistakes at compile time rather than run time.