vb.net去除字母 vba 去掉指定字符

VB.NET如何把字符串(不全是数字或为空)转换成数字?明白你的意思了,只要是字母都会转换成数字,帮你写好了("usernane"和 "pasward" 我这里写成"username" 和" password")
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim username, password As String
Dim temp As Long
Dim r As String = ""
Dim v As String = TextBox1.Text
For Each c In v.ToString
If IsNumeric(c) Then
r = c
Else
r = ((Asc(c) - 65).ToString("00"))
End If
Next
username = r
temp = username * 3 - 500
password = CStr(temp)
TextBox2.Text = password
End Sub
vb.net 字符串的分解处理,将字符串中由数字和字母所组成的东东提取出来,并形成数组Imports System.Text.RegularExpressions
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim my_str As String = "3#@!Ab156(?*hLE\$"
Dim a() As String = Regex.Split(Regex.Replace(my_str, "^[\W] |[\W] $", ""), "\W ")
End Sub
End Class
请问在VB.NET中如何去除 这个空格你是要把连续多个空格,变换成只需要一个空格 , 那么:
do while Instr(tStr,"")0
tStr = Replace(tStr, "", " ") '用一个空格,替换2个空格
loop
vb.net怎么读取txt数据,去掉含有字母的行,对只含有数字的行,只取其前四个数据,或是中间某几个数据!Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim line As String
Dim isnumber As Boolean
Dim i As Int16
Dim f As FileStream
Dim ff As FileStream
ff = New FileStream("c:\数据1.txt", FileMode.OpenOrCreate)
f = New FileStream("c:\数据.txt", FileMode.Open)
Dim rf As StreamReader
rf = New StreamReader(f)
Dim fw As StreamWriter
fw = New StreamWriter(ff)
Do
line = rf.ReadLine
If line = "" Then Exit Do
isnumber = True
For i = 1 To line.Length
If IsNumeric(Microsoft.VisualBasic.Mid(line, i, 1)) = False Then
isnumber = False
Exit For
End If
Next
If isnumber Then
'line = Microsoft.VisualBasic.Left(line, 4)'取左边4个
'line = Microsoft.VisualBasic.Mid(line, n, n) 取中间几个
fw.WriteLine(line)
End If
Loop
fw.Close()
rf.Close()
ff.Close()
f.Close()
End Sub
End Class
在form上放一个button,在c:\数据.txt里放入你要读取的数据,点击button,会生成c:\数据1.txt 。里边就是你要的数据了,根据你的需要把
'line = Microsoft.VisualBasic.Left(line, 4)'取左边4个
'line = Microsoft.VisualBasic.Mid(line, n, n) 取中间几个
前边的引号去掉就可以满足你的要求了 。
程序在win7 64x VB2005条件下测试没有问题 。
VB.net中字串怎样去掉最后一位dim s = "123456"
msgbox(mid(s,1,s.length-1))
或者
msgbox(s.left(s.length-1))
好像是这样
使用VB.net 不知道按错哪个键,现在输入一个字母,后面字母会被替代了.那我该怎么处理你按到键盘上的 Insert建了 在 Home键的后面,把这个键在按一次就好了
【vb.net去除字母 vba 去掉指定字符】vb.net去除字母的介绍就聊到这里吧 , 感谢你花时间阅读本站内容,更多关于vba 去掉指定字符、vb.net去除字母的信息别忘了在本站进行查找喔 。

    推荐阅读