vb.net修改文件 vb如何修改文件名

vb.Net对文件指定字符串的修改

文本框 TextBox1

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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批量改word内容

批量替换word文档中的内容的方法:启动Word文档软件。按Ctrl+O打开需要修改的文件。打开需要修改的文件后,在word菜单栏点击“替换”按钮。在弹出的替换对话框中:首选查找到需要替换的内容,再输入替换为的内容。然后点击“全部替换”即可,如图所示:

VB.NET中,文件对话框(OpenFileDialog)显示某种设定的文件类型需要修改什么属性?

Filter 属性设置当前文件名筛选字符串,该字符串确定出现在对话框的“文件类型”框中的选项。

openFileDialog1.InitialDirectory = "c:\\" ;

openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ;

openFileDialog1.FilterIndex = 1 ; // 获取或设置文件对话框中当前选定筛选器的索引;

openFileDialog1.RestoreDirectory = true ;

对于每个筛选选项,筛选器字符串都包含筛选器说明,后接一垂直线条 (|) 和筛选器模式。不同筛选选项的字符串由垂直线条隔开。

VB.net如何提取system并修改文件安全属性?

将以下代码保存到模块中:

Declare Function GetPrivateProfileString Lib "kernel32" Alias _

"GetPrivateProfileStringA" (ByVal lpApplicationName As String, _

ByVal lpKeyName As Any, _

ByVal lpDefault As String, _

ByVal lpReturnedString As String, _

ByVal nSize As Long, _

ByVal lpFileName As String) As Long

Declare Function WritePrivateProfileStringByKeyName Lib "kernel32" Alias _

"WritePrivateProfileStringA" (ByVal lpApplicationName As String, _

ByVal lpKeyName As String, _

ByVal lpString As String, _

Public Function GetIniParam(NomFichier As String, NomSection As String, NomVariable As String) As String

Dim ReadString As String * 255

Dim returnv As String

Dim mResultLen As Integer

mResultLen = GetPrivateProfileString(NomSection, NomVariable, "(Unassigned)", ReadString, Len(ReadString) - 1, NomFichier)

If IsNull(ReadString) Or Left$(ReadString, 12) = "(Unassigned)" Then

Dim Tempvalue As Variant

Dim Message As String

Message = "配置文件 " NomFichier " 不存在."

returnv = ""

Else

returnv = Left$(ReadString, InStr(ReadString, Chr$(0)) - 1)

End If

GetIniParam = returnv

End Function

Public Function WriteWinIniParam(NomDuIni As String, sLaSection As String, sNouvelleCle As String, sNouvelleValeur As String)

Dim iSucccess As Integer

iSucccess = WritePrivateProfileStringByKeyName(sLaSection, sNouvelleCle, sNouvelleValeur, NomDuIni)

If iSucccess = 0 Then

WriteWinIniParam = False

Else

WriteWinIniParam = True

End If

End Function

调用方法:

Call WriteWinIniParam(App.Path "\LiveUpdate.ini", "LiveUpdate", "AppName", txtAppName.Text)

txtFile.Text = GetIniParam(App.Path "\LiveUpdate.ini", "LiveUpdate", "FILES1")


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