本文整理匯總了VB.NET中System.Int32.Parse方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET Int32.Parse方法的具體用法？VB.NET Int32.Parse怎麽用？VB.NET Int32.Parse使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Int32的用法示例。
在下文中一共展示了Int32.Parse方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: ParseInt32
' 導入命名空間
Imports System.Globalization
Module ParseInt32
Public Sub Main()
Convert("12,000", NumberStyles.Float Or NumberStyles.AllowThousands, _
New CultureInfo("en-GB"))
Convert("12,000", NumberStyles.Float Or NumberStyles.AllowThousands, _
New CultureInfo("fr-FR"))
Convert("12,000", NumberStyles.Float, New CultureInfo("en-US"))
Convert("12 425,00", NumberStyles.Float Or NumberStyles.AllowThousands, _
New CultureInfo("sv-SE"))
Convert("12,425.00", NumberStyles.Float Or NumberStyles.AllowThousands, _
NumberFormatInfo.InvariantInfo)
Convert("631,900", NumberStyles.Integer Or NumberStyles.AllowDecimalPoint, _
New CultureInfo("fr-FR"))
Convert("631,900", NumberStyles.Integer Or NumberStyles.AllowDecimalPoint, _
New CultureInfo("en-US"))
Convert("631,900", NumberStyles.Integer Or NumberStyles.AllowThousands, _
New CultureInfo("en-US"))
End Sub
Private Sub Convert(value As String, style As NumberStyles, _
provider As IFormatProvider)
Try
Dim number As Integer = Int32.Parse(value, style, provider)
Console.WriteLine("Converted '{0}' to {1}.", value, number)
Catch e As FormatException
Console.WriteLine("Unable to convert '{0}'.", value)
Catch e As OverflowException
Console.WriteLine("'{0}' is out of range of the Int32 type.", value)
End Try
End Sub
End Module
' This example displays the following output to the console:
' Converted '12,000' to 12000.
' Converted '12,000' to 12.
' Unable to convert '12,000'.
' Converted '12 425,00' to 12425.
' Converted '12,425.00' to 12425.
' '631,900' is out of range of the Int32 type.
' Unable to convert '631,900'.
' Converted '631,900' to 631900.示例2: ParseInt32
' 導入命名空間
Imports System.Globalization
Module ParseInt32
Public Sub Main()
Convert("104.0", NumberStyles.AllowDecimalPoint)
Convert("104.9", NumberStyles.AllowDecimalPoint)
Convert(" $17,198,064.42", NumberStyles.AllowCurrencySymbol Or _
NumberStyles.Number)
Convert("103E06", NumberStyles.AllowExponent)
Convert("-1,345,791", NumberStyles.AllowThousands)
Convert("(1,345,791)", NumberStyles.AllowThousands Or _
NumberStyles.AllowParentheses)
End Sub
Private Sub Convert(value As String, style As NumberStyles)
Try
Dim number As Integer = Int32.Parse(value, style)
Console.WriteLine("Converted '{0}' to {1}.", value, number)
Catch e As FormatException
Console.WriteLine("Unable to convert '{0}'.", value)
Catch e As OverflowException
Console.WriteLine("'{0}' is out of range of the Int32 type.", value)
End Try
End Sub
End Module輸出：
Converted '104.0' to 104. 104.9' is out of range of the Int32 type. $17,198,064.42' is out of range of the Int32 type. Converted '103E06' to 103000000. Unable to convert '-1,345,791'. Converted '(1,345,791)' to -1345791.
示例3: Example
Module Example
Public Sub Main()
Dim values() As String = { "+13230", "-0", "1,390,146", "$190,235,421,127",
"0xFA1B", "163042", "-10", "007", "2147483647",
"2147483648", "16e07", "134985.0", "-12034",
"-2147483648", "-2147483649" }
For Each value As String In values
Try
Dim number As Integer = Int32.Parse(value)
Console.WriteLine("{0} --> {1}", value, number)
Catch e As FormatException
Console.WriteLine("{0}: Bad Format", value)
Catch e As OverflowException
Console.WriteLine("{0}: Overflow", value)
End Try
Next
End Sub
End Module輸出：
+13230 --> 13230 -0 --> 0 1,390,146: Bad Format $190,235,421,127: Bad Format 0xFA1B: Bad Format 163042 --> 163042 -10 --> -10 007 --> 7 2147483647 --> 2147483647 2147483648: Overflow 16e07: Bad Format 134985.0: Bad Format -12034 --> -12034 -2147483648 --> -2147483648 -2147483649: Overflow
示例4: CultureInfo
Protected Sub OkToInteger_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles OkToInteger.Click
Dim locale As String
Dim culture As CultureInfo
Dim number As Integer
' Return if string is empty
If String.IsNullOrEmpty(Me.inputNumber.Text) Then Exit Sub
' Get locale of web request to determine possible format of number
If Request.UserLanguages.Length = 0 Then Exit Sub
locale = Request.UserLanguages(0)
If String.IsNullOrEmpty(locale) Then Exit Sub
' Instantiate CultureInfo object for the user's locale
culture = New CultureInfo(locale)
' Convert user input from a string to a number
Try
number = Int32.Parse(Me.inputNumber.Text, culture.NumberFormat)
Catch ex As FormatException
Exit Sub
Catch ex As Exception
Exit Sub
End Try
' Output number to label on web form
Me.outputNumber.Text = "Number is " & number.ToString()
End Sub