[dba-VB] .net piddly warnings

In VB.Net, you can combine the declaration and the initialization on one
line as follows:

Dim str as String = vbNullString
Dim bol as Boolean = False
Dim int as Integer = 0

Doris Manning
Database Administrator
Hargrove Inc.


-----Original Message-----
From: dba-vb-bounces at databaseadvisors.com
[mailto:dba-vb-bounces at databaseadvisors.com] On Behalf Of Eric Barro
Sent: Sunday, July 24, 2005 12:12 PM
To: dba-vb at databaseadvisors.com
Subject: RE: [dba-VB] .net piddly warnings

John,

I would change the code to read as...

        Dim str As New StringBuilder
        For Each lstcSysVar In Me.List
            str.Append(" " & lstcSysVar.pValue.ToString)
        Next
        Return str.ToString()

The StringBuilder class is more efficient than the old string concatenation
routines in classic VB.

Eric

-----Original Message-----
From: dba-vb-bounces at databaseadvisors.com
[mailto:dba-vb-bounces at databaseadvisors.com] On Behalf Of John W. Colby
Sent: Sunday, July 24, 2005 4:43 AM
To: dba-vb at databaseadvisors.com
Subject: [dba-VB] .net piddly warnings

I am getting a lot of warnings like 

Variable Umptiumpt used before it is assigned a value.  The following code
causes such a warning:

        Dim str As String
        For Each lstcSysVar In Me.List
            str = str & " " & lstcSysVar.pValue.ToString
        Next
        Return str

This is quite common methodology and would require the quite unnecessary 
	
	str = ""

After the dim statement to avoid the warning.

Is there any way to acknowledge the warning and cause it to go away,
preferably for specific instances (lines) of code?  It seems that unless you
just always do the variable initialization you are going to end up with
hundreds of useless warnings masking real warnings that you wish to be made
aware of.

John W. Colby
www.ColbyConsulting.com 

Contribute your unused CPU cycles to a good cause:
http://folding.stanford.edu/



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