我希望能够查找文件中的特定字节,然后更改该字节。我已经尝试了一些东西,但没有任何效果。
Const fileName As String = "Option.mco"
Using writer As BinaryWriter = New BinaryWriter(File.Open(fileName, FileMode.Create))
writer.Seek(39, SeekOrigin.Begin)
writer.Write(1600)
End Using
使用此代码我可以转到字节 39,但问题是该字节之前的所有内容都变为 00,而之后的所有内容都将被删除。
我也试过这个:
Dim fLocation = ("Option.mco")
Dim fInfo As New FileInfo(fLocation)
Dim numBytes As Long = fInfo.Length
Dim fStream As New FileStream(fLocation, FileMode.Open, FileAccess.Read)
Dim br As New BinaryReader(fStream)
Dim data As Byte() = br.ReadBytes(CInt(numBytes))
Dim fs As New FileStream(fLocation, FileMode.Open, FileAccess.Read)
' Show the number of bytes in the array.
'Label1.Text = Convert.ToString(data.Length)
'Dim writeStream As FileStream
'writeStream = New FileStream(fLocation, FileMode.Create)
'Dim writeBinay As New BinaryWriter(writeStream)
Dim value As Short = 1600
Dim value2 As Short = 900
Dim dataArray(1600) As Byte
fs.Seek(39, SeekOrigin.Begin)
fs.Write(1600)
'writeBinay.Write(value)
fs.Seek(43, SeekOrigin.Begin)
'writeBinay.Write(value2)
fs.WriteByte(value2)
'writeBinay.Close()
br.Close()
fStream.Close()
我也试过这个:
Dim fLocation = ("Option.mco")
Dim writeStream As New FileStream(fLocation, FileMode.Create)
Dim writeBinay As New BinaryWriter(writeStream)
Dim value As Short = 1600
Dim value2 As Short = 900
writeBinay.Seek(39, SeekOrigin.Begin)
writeBinay.Write(value)
writeBinay.Seek(43, SeekOrigin.Begin)
writeBinay.Write(value2)
writeBinay.Close()
这是文件的字节:http: //puu.sh/3nxrd.jpg