Exception when Parsing String VB.NET

Question

Here is the exception:

"Input string was not in a correct format."

Here is the line of code:

.Add(Integer.Parse(LoanData.Item("IsApplicantRaceAmericanIndian")).ToString)

We need to see what LoanData.Item() returns before we can help. it's obviously returning a value that Integer.Parse() can't parse. — Scott M.
– Scott M., Commented Jul 28, 2010 at 19:24
Why are you turning the Item into a String, then into an Integer? What is it originally? — rownage
– rownage, Commented Jul 28, 2010 at 19:24
What type is returned from LoanData.Item()? Is it a boolean? A string? — DCNYAM
– DCNYAM, Commented Jul 28, 2010 at 19:24
It is throwing because the LoanData.Item() returns something that cannot be parsed to an integer. It's kinda obvious. — Darin Dimitrov
– Darin Dimitrov, Commented Jul 28, 2010 at 19:25
What are the contents of LoanData? What is the value of LoanData.Item("IsApplicantRaceAmericanIndian") ? Are you guaranteed that it will be an Integer? — Ryan Hayes
– Ryan Hayes, Commented Jul 28, 2010 at 19:26

Dan Tao · Accepted Answer · 2010-07-28 19:23:46Z

4

The text you're trying to parse must not represent a valid integer. For example it might be "ABC" or it might be blank.

Use Integer.TryParse instead of Integer.Parse for a more resilient parsing strategy:

Dim text As String = LoanData.Item("IsApplicantRaceAmericanIndian")).ToString()

Dim value As Integer
If Integer.TryParse(text, value)
    .Add(value)
Else
    ' The text could not be parsed. '
    ' Notify the user, log it, do whatever you like. '
End If

answered Jul 28, 2010 at 19:23

Dan Tao

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Comments

Diego Pereyra · Accepted Answer · 2010-07-28 19:25:22Z

0

As a tip, Integer.Parse won't handle empty or null strings. Try using Integer.TryParse if you are using .NET 2.0 or newer.

answered Jul 28, 2010 at 19:25

Diego Pereyra

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