vb.net指定字符,vb包含字符
vb.net 提取特定字符串
VB.net里有Split函数吗？
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我的思路是，先寻找http://字符，然后向后寻找第一个在链接中肯定不会出现的字符，比如 ' " ; , 等等，截取中间这段就行啦
比如
doiicfur utiyo:('')bur;
先查找"http://",发现在第19个字符处（一定要注意，VB.net第一个字符的索引值下标为0，所以h是第20个字母，搜索所得到的结果就是19）
然后从19向后搜索异常字符（ " ' ; , ）之类，得到第二个搜索结果，将这两个结果中间的部分截取就是链接啦
vb.Net对文件指定字符串的修改
文本框 TextBox1
上一条 Button1
下一条 Button2
修改 Button3
Imports System.IO
Public Class Form1
Dim currIndex As Integer = 0
Dim s2 As List(Of String) = New List(Of String)
Dim s As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
s = File.ReadAllText(Application.StartupPath "\txt.txt")
Dim s1 As String() = s.Split("@")
For i As Integer = 0 To s1.Length - 1
If s1(i).Trim() "" Then
s2.Add("@" s1(i))
End If
Next
TextBox1.Text = s2(0)
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
currIndex = currIndex + 1
If currIndex s2.Count - 1 Then
MsgBox("已经是最后条了")
Return
End If
TextBox1.Text = s2(currIndex)
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
currIndex = currIndex - 1
If currIndex 0 Then
MsgBox("已经是第一条了")
Return
End If
TextBox1.Text = s2(currIndex)
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
s2(currIndex) = TextBox1.Text
s = ""
For i As Integer = 0 To s2.Count - 1
s = s2(i)
Next
File.WriteAllText(Application.StartupPath "\txt.txt", s)
End Sub
End Class
VB.NET怎么输出指定字符串文本文件
Dim strFilePath As String =SaveFileDialog1.FileName
Dim sw As StreamWriter = New StreamWriter（strFilePath， True） 'true是指以追加的方式打开指定文件
For i = 0 To j
temp = i.ToString
sw.WriteLine（temp）
sw.Flush（）
Next
sw.Close（）
sw = Nothing
VB.net2010按指定字符截取字符串
Dim str0 As String, idx As Long, str1 As String, str2 As String
str0 = "122012312｝R4561_456}7894321}1234123123}"
idx = str0.IndexOf("}")
Do While idx = 0
str1 = str0.Substring(0, idx)
str2 = str0.Substring(idx + 1)
'在文本框中添加显示str1、str2,代码略
str0 = str2
idx = str0.IndexOf("}")
Loop
vb.net 正则表达式读取指定字符
这种情况不建议使用正则做匹配，而且从你贴出来的这一小部分代码里也看不出什么规律。
建议使用 HtmlAgilityPack 或者 NSoup 一类的库，就可以把 HTML 文档变成类似于 jQuery 选择的方式来处理了，容错性和便捷度都更高。
VB.NET textbox里所有指定字符串后面的数字相乘？
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim s() As String
s = Split(TextBox1.Text, vbCrLf)
For i = 0 To UBound(s)
If s(i) Like "time_0=*" Then s(i) = "time_0=" Val(Split(s(i), "=")（1） * 2)
Next
TextBox1.Text = Join(s, vbCrLf)
End Sub
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