How do fix error ToInt32 is not a member of Convert.

SuperCoder 401 Reputation points
2026-10-02T18:08:01.8833333+00:00

GitHub Copilot suggested some code improvements but one suggested line produces the error above.

Code: If countObj IsNot Nothing AndAlso Convert.ToInt32(countObj) > 0 Then

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Answer accepted by question author
Brian Pham (WICLOUD CORPORATION) 165 Reputation points Microsoft External Staff Moderator
2026-10-05T02:30:56.94+00:00

Hi @SuperCoder ,

The error message "'ToInt32' is not a member of 'Convert'" suggests a compile-time issue rather than a conversion failure. In VB.NET, System.Convert includes the ToInt32() method, so this error often occurs when Convert is resolving to another object, class, or variable instead of System.Convert.

Could you try using the fully qualified type of name below and let me know if the error persists?

If countObj IsNot Nothing AndAlso System.Convert.ToInt32(countObj) > 0 Then
    ...
End If

If the same error occurs, can you please share:

  • The exact project type (VB.NET, VBA, ASP.NET, etc.)
  • The full error message
  • Whether there is a custom class, module, or variable named Convert in the project

This information will help determine whether a naming conflict is causing the issue.

If you found my response helpful or informative, I would greatly appreciate it if you could follow this guide for your confirmation. Thank you.

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Answer accepted by question author
Avik Majumder 80 Reputation points
2026-10-03T17:06:38.5833333+00:00

If this is VB.NET, Convert.ToInt32() normally exists. If you're getting “ToInt32 is not a member of Convert”, the most likely issue is that Convert is resolving to something other than System.Convert.

Try explicitly qualifying it:

If countObj IsNot Nothing AndAlso System.Convert.ToInt32(countObj) > 0 Then
    ' ...
End If

If countObj is a database value

If it can contain DBNull.Value, use:

If countObj IsNot Nothing AndAlso
   Not Convert.IsDBNull(countObj) AndAlso
   Convert.ToInt32(countObj) > 0 Then
    ' ...
End If

Or, more robustly:

Dim count As Integer = If(countObj Is Nothing OrElse Convert.IsDBNull(countObj),
                         0,
                         Convert.ToInt32(countObj))
If count > 0 Then
    ' ...
End If

If System.Convert.ToInt32(countObj) also gives the same error then what is the declaration/type of countObj and the exact error message? There's likely a naming conflict with Convert.

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  1. Marcin Policht 109.8K Reputation points MVP Volunteer Moderator
    2026-10-02T19:14:03.48+00:00

    The issue is likely that countObj is an Object whose value cannot be converted to an Int32 in the way Convert.ToInt32(countObj) expects. If the value is already numeric but may be DBNull, a safer approach is to use Convert.ToInt32(countObj) only after confirming the actual type/value. If this is VB.NET and countObj comes from a database query, use If(IsDBNull(countObj), 0, Convert.ToInt32(countObj)) or check for DBNull.Value explicitly.

    If the above response helps answer your question, remember to "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

    hth

    Marcin

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