別のサイトで見つけた C# スクリプトを変換しようとしています: http://www.codeproject.com/Tips/307548/Resume-Suppoert-Downloading
これまでのところ、ほとんどを変換できましたが、プログラムを実行すると、0バイトのファイルしか作成されません。C# で実行すると完全に動作するので、私の変換スキル (またはこの場合は不足) に問題があることがわかっています。
これは C#
static void DownloadFile(string sSourceURL, string sDestinationPath)
{
long iFileSize = 0;
int iBufferSize = 1024;
iBufferSize *= 1000;
long iExistLen = 0;
System.IO.FileStream saveFileStream;
if (System.IO.File.Exists(sDestinationPath))
{
System.IO.FileInfo fINfo =
new System.IO.FileInfo(sDestinationPath);
iExistLen = fINfo.Length;
}
if (iExistLen > 0)
saveFileStream = new System.IO.FileStream(sDestinationPath,
System.IO.FileMode.Append, System.IO.FileAccess.Write,
System.IO.FileShare.ReadWrite);
else
saveFileStream = new System.IO.FileStream(sDestinationPath,
System.IO.FileMode.Create, System.IO.FileAccess.Write,
System.IO.FileShare.ReadWrite);
System.Net.HttpWebRequest hwRq;
System.Net.HttpWebResponse hwRes;
hwRq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(sSourceURL);
hwRq.AddRange((int)iExistLen);
System.IO.Stream smRespStream;
hwRes = (System.Net.HttpWebResponse)hwRq.GetResponse();
smRespStream = hwRes.GetResponseStream();
iFileSize = hwRes.ContentLength;
int iByteSize;
byte[] downBuffer = new byte[iBufferSize];
while ((iByteSize = smRespStream.Read(downBuffer, 0, downBuffer.Length)) > 0)
{
saveFileStream.Write(downBuffer, 0, iByteSize);
}
}
今私のVB.NET
Dim sSourceURL As String = TextBox1.Text
Dim sDestinationPath As String = TextBox2.Text
Dim iFileSize As Long = 0
Dim iBufferSize As Integer = 1024
iBufferSize *= 1000
Dim iExistLen As Long = 0
Dim saveFileStream As System.IO.FileStream
If System.IO.File.Exists(sDestinationPath) Then
Dim fINfo As New System.IO.FileInfo(sDestinationPath)
iExistLen = fINfo.Length
End If
If iExistLen > 0 Then
saveFileStream = New System.IO.FileStream(sDestinationPath, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite)
Else
saveFileStream = New System.IO.FileStream(sDestinationPath, System.IO.FileMode.Create, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite)
End If
Dim hwRq As System.Net.HttpWebRequest
Dim hwRes As System.Net.HttpWebResponse
hwRq = DirectCast(System.Net.HttpWebRequest.Create(sSourceURL), System.Net.HttpWebRequest)
hwRq.AddRange(CInt(iExistLen))
Dim smRespStream As System.IO.Stream
hwRes = DirectCast(hwRq.GetResponse(), System.Net.HttpWebResponse)
smRespStream = hwRes.GetResponseStream()
iFileSize = hwRes.ContentLength
Dim iByteSize As Integer
Dim downBuffer As Byte() = New Byte(iBufferSize) {}
While ((smRespStream.Read(downBuffer, 0, downBuffer.Length))) > 0
saveFileStream.Write(downBuffer, 0, iByteSize)
End While
私が経験している問題は、次のコードにあると思います。
While ((smRespStream.Read(downBuffer, 0, downBuffer.Length))) > 0
saveFileStream.Write(downBuffer, 0, iByteSize)
End While
お時間をいただきありがとうございました:)