change.vb

用于richtext框中

Imports System.IO

Public Class Change
    Dim mytext As String

    Public Sub mychange(ByVal path As String, ByVal oldstring As String, ByVal newstring As String)
        'path为要修改的文件路径 oldstring为要修改的字符串 newstring为修改后的字符串
        Try
            '读取文件
            Using myStreamReader As StreamReader = File.OpenText(path)
                mytext = myStreamReader.ReadToEnd()
            End Using
            '更改
            mytext = mytext.Replace(oldstring, newstring)
            '写回
            My.Computer.FileSystem.WriteAllText(path, mytext, False)
        Catch ex As Exception
            MsgBox("文件操作出错")
        End Try
    End Sub
End Class