如何在小数点（。）之前得到左边字符的文本长度？ [英] How can I get the textlength of left characters before decimal point(.)?

问题描述

如何获得小数点前的左侧字符的文本长度（。）？



示例Run1：

Textbox7.text = 9.48 03/21/2014

预期结果= 0.48 03/21/2014



样本运行2：

Textbox7.text = 9.8 03/21/2014

预计结果= 09.08 03/21/2014





如果Val（TextBox7.Text.Trim.Split（。）（1）.Length = 1）那么

TextBox7.Text =0+ TextBox7.Text

结束如果

How can I get the textlength of left characters before decimal point(.)?

Sample Run1:
Textbox7.text = 9.48 03/21/2014
Expected Result = 0.48 03/21/2014

Sample Run2:
Textbox7.text = 9.8 03/21/2014
Expected Result = 09.08 03/21/2014


If Val(TextBox7.Text.Trim.Split(".")(1).Length = 1) Then
TextBox7.Text = "0" + TextBox7.Text
End If

推荐答案

这是你问题的解决方案出现在标题中。请参阅以下示例和注释中的说明：

This is the solution to your question appeared in the title. See the following example and explanation in comments:

Imports System

Public Module Module1
    Public Sub Main()

        DIM str as string ="1253.45"

        ' Find the index position of . in str
        DIM pos as Integer = str.IndexOf(".")

        ' Find the left part of the str till .
        DIM leftStr as string = str.Substring(0, pos)

        ' Get the length of the left part
        Console.WriteLine(leftStr.length)
    End Sub
End Module

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