我希望我的程序能够读取文本文件中的某些文本。例如,如果我有一个包含以下信息的文本文件...
我希望我的vb.net应用程序能够获取到账户变量等于blah,密码变量等于hello。
有人能告诉我如何做吗?
谢谢。
acc=blah
pass=hello
我希望我的vb.net应用程序能够获取到账户变量等于blah,密码变量等于hello。
有人能告诉我如何做吗?
谢谢。
acc=blah
pass=hello
这是一个简短的代码段,点击按钮后将:
以下是代码:
Imports System.IO
Imports System.Text.RegularExpressions
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim strFile As String = "Test.INI"
Dim sr As New StreamReader(strFile)
Dim InputString As String
While sr.Peek <> -1
InputString = sr.ReadLine()
checkIfContains(InputString)
InputString = String.Empty
End While
sr.Close()
End Sub
Private Sub checkIfContains(ByVal inputString As String)
Dim outputFile As String = "testOutput.txt"
Dim m As Match
Dim m2 As Match
Dim itemPattern As String = "acc=(\S+)"
Dim itemPattern2 As String = "pass=(\S+)"
m = Regex.Match(inputString, itemPattern, _
RegexOptions.IgnoreCase Or RegexOptions.Compiled)
m2 = Regex.Match(inputString, itemPattern2, _
RegexOptions.IgnoreCase Or RegexOptions.Compiled)
Do While m.Success
Console.WriteLine("Found account {0}", _
m.Groups(1), m.Groups(1).Index)
m = m.NextMatch()
Loop
Do While m2.Success
Console.WriteLine("Found password {0}", _
m2.Groups(1), m2.Groups(1).Index)
m2 = m2.NextMatch()
Loop
End Sub
End Class
Private _settings As My.MySettings
Private _acc as String
Private _pass as String
Public ReadOnly Property Settings() As System.Configuration.ApplicationSettingsBase
Get
If _settings Is Nothing Then
_settings = New My.MySettings
End If
Return _settings
End Get
End Property
Private Sub SetSettings()
Settings.SettingsKey = Me.Name
Dim theSettings As My.MySettings
theSettings = DirectCast(Settings, My.MySettings)
theSettings.acc=_acc
theSettings.pass=_pass
Settings.Save()
End Sub
Private Sub GetSettings()
Settings.SettingsKey = Me.Name
Dim theSettings As My.MySettings
theSettings = DirectCast(Settings, My.MySettings)
_acc=theSettings.acc
_pass=theSettings.pass
End Sub
<userSettings>
<MyTestApp.My.MySettings>
<setting name="acc" serializeAs="String">
<value>blah</value>
</setting>
<setting name="pass" serializeAs="String">
<value>hello</value>
</setting>
</MyTestApp.My.MySettings>
</userSettings>
你不能只选择性地读取文件中的某个特定信息。你需要扫描文件的每一行,并在行首搜索字符串"pass="。我不懂VB,但可以查阅以下主题:
Regex
类。使用它,你文件中的acc
变量将是等于号之前的所有内容,然后blah
将是等于号到换行符(\n
)之间的所有内容。然后进入下一行并重复此过程。我为你写了这个,请检查并享受结果,祝你有美好的一天!
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim acc As New List(Of String)
Dim pass As New List(Of String)
Dim lines() As String = System.IO.File.ReadAllLines(".\credentials.txt")
For Each lineItem As String In lines
Dim vals() As String = lineItem.Split(Convert.ToChar("="))
If vals.Length > 0 Then
Dim lineId As String = vals(0)
If lineId = "acc" Then
acc.Add(vals(1))
ElseIf lineId = "pass" Then
pass.Add(vals(1))
End If
End If
Next
TextBox_acc.Text = String.Join(Environment.NewLine, acc)
TextBox_pass.Text = String.Join(Environment.NewLine, pass)
End Sub
End Class