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  • 文件下载并删除

    /// <summary>
    /// 文件下载并删除
    /// </summary>
    /// <param name="result"> </param>
    public void FileDownLoadDel(string fullFilename)
    {
    System.IO.Stream iStream = null;
    // Buffer to read 10K bytes in chunk:
    byte[] buffer = new Byte[10000];

    // Length of the file:
    int length;

    // Total bytes to read:
    long dataToRead;

    // Identify the file to download including its path.
    string filepath = fullFilename;

    // Identify the file name.
    string filename = System.IO.Path.GetFileName(filepath);

    try
    {
    // Open the file.
    iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
    System.IO.FileAccess.Read, System.IO.FileShare.Read);


    // Total bytes to read:
    dataToRead = iStream.Length;

    Response.ContentType = "application/octet-stream";
    Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);

    // Read the bytes.
    while (dataToRead > 0)
    {
    // Verify that the client is connected.
    if (Response.IsClientConnected)
    {
    // Read the data in buffer.

    length = iStream.Read(buffer, 0, 10000);

    // Write the data to the current output stream.
    Response.OutputStream.Write(buffer, 0, length);

    // Flush the data to the HTML output.
    Response.Flush();

    buffer = new Byte[10000];
    dataToRead = dataToRead - length;
    }
    else
    {
    //prevent infinite loop if user disconnects
    dataToRead = -1;
    Response.Clear();
    }
    }
    Response.End(); //没有这句会将该页面刷新后的内容追加写入文件中。
    }
    catch (Exception ex)
    {
    // Trap the error, if any.
    //Response.Write("Error : " + ex.Message);
    //base.WriteLog("资料", "下载资料:" + ex.Message + "!", LogType.Error, this.GetType().ToString());

    }
    finally
    {
    if (iStream != null)
    {
    //Close the file.
    iStream.Close();
    }
    File.Delete(fullFilename);
    }
    }

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  • 原文地址:https://www.cnblogs.com/jasonwb/p/1875318.html
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