vb.net FormatNumber用法

Title	Use the FormatNumber function in Visual Basic .NET
Description	This example shows how to use the FormatNumber function in Visual Basic .NET.
Keywords	FormatNumber,format number,VB.NET
Categories	Strings,VB.NET

The FormatNumber function returns a formatted string representation for a number. The Syntax is: @H_301_40@ FormatNumber(expression _ [,digits_after_decimal] _ [,include_leading_zero] _ [,use_parens_if_negative] _ [,groups_digits] )

Where:

expression: The numeric expression to format
digits_after_decimal: The number of digits to display after the decimal point
include_leading_zero: If the number is less than 1 and greater than -1,determines whether the number should have a leading 0 before the decimal point.
use_parens_if_negative: Determines whether negative numbers are surrounded with parentheses instead of using a minus sign.
groups_digits: Determines whether digits to the left of the decimal point are grouped with thousands separators (commas in the United States).

Examples:

Expression	Result
`FormatNumber(1.23456,2)`	`1.23`
`FormatNumber(0.123456,2,TriState.False)`	`.12`
`FormatNumber(0.123456,TriState.True)`	`0.12`
`FormatNumber(-12345.12,TriState.False)`	`-12,345.12`
`FormatNumber(-12345.12,TriState.True)`	`(12,345.12)`
`FormatNumber(-12345.12,TriState.True,TriState.False)`	`(12345.12)`

This example uses the following code to display these examples in a TextBox.

@H_301_40@ @H_301_40@Private Sub Form1_Load(ByVal sender As System.Object,ByVal _ e As System.EventArgs) Handles MyBase.Load Dim txt As String Dim x As Single x = 1.23456 txt &= "FormatNumber(" & x.ToString() & ",2) = " & _ FormatNumber(x,2) & vbCrLf x = 0.123456 txt &= "FormatNumber(" & x.ToString() & "," & _ "TriState.False) = " & FormatNumber(x,_ TriState.False) & vbCrLf txt &= "FormatNumber(" & x.ToString() & "," & _ "TriState.True) = " & FormatNumber(x,_ TriState.True) & vbCrLf x = -12345.12345 txt &= "FormatNumber(" & x.ToString() & ",_ TriState.True) & vbCrLf txt &= "FormatNumber(" & x.ToString() & "," & _ "TriState.True,TriState.False) = " & _ FormatNumber(x,TriState.False) _ & vbCrLf txtResult.Text = txt txtResult.Select(0,0) End Sub

原文链接：https://www.f2er.com/vb/260956.html

vb.net FormatNumber用法

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