字节数据下载一个word文件asp.net

Question

我有一个包含两个表的数据集。第一个告诉我它是一个 doc 文件。第二个包含文件的字节数组。但是我需要取出前 85 个字节，因为它们包含由 Access 创建的 OLE 对象标头。到目前为止我有这个。 .

    protected void Page_Load(object sender, EventArgs e)
    {
        int examId = Convert.ToInt32(Request.QueryString["exam_id"]);
        SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["RHD_CS"].ConnectionString);
        try
        {
            conn.Open();
        }
        catch (Exception)
        {
        }

        SqlCommand cmd = new SqlCommand();
        cmd.Connection = conn;
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.CommandText = "usp_spirometry_readexam";

        cmd.Parameters.Add("@iExamID", SqlDbType.Int);

        cmd.Parameters["@iExamID"].Value = examId;

        string sFileName = "exam" + examId.ToString()+".";

        DataSet dsData = new DataSet();
        SqlDataAdapter daData = new SqlDataAdapter(cmd);
        daData.Fill(dsData);

        DataRow drDocData = dsData.Tables[1].Rows[0];
        byte[] bDocData =  (byte[])drDocData["exam_binary"];


        Response.Clear();
        Response.ContentType = "application/msword";
        Response.AddHeader("Content-Disposition", "attachment;filename= filename.doc");
        Response.BinaryWrite(bDocData);
        Response.End();

这行得通，但是当文件被下载时，它只是一堆乱码。

已解决 感谢所有的帮助。我通过使用流然后将其转换回字节解决了这个问题。

     protected void Page_Load(object sender, EventArgs e)
    {
        int examId = Convert.ToInt32(Request.QueryString["exam_id"]);
        SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["RHD_CS"].ConnectionString);
        try
        {
            conn.Open();
        }
        catch (Exception)
        {
        }

        SqlCommand cmd = new SqlCommand();
        cmd.Connection = conn;
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.CommandText = "usp_spirometry_readexam";

        cmd.Parameters.Add("@iExamID", SqlDbType.Int);

        cmd.Parameters["@iExamID"].Value = examId;

        string sFileName = "exam" + examId.ToString()+".";

        DataSet dsData = new DataSet();
        SqlDataAdapter daData = new SqlDataAdapter(cmd);
        daData.Fill(dsData);


        DataRow drDocData = dsData.Tables[1].Rows[0];
        byte[] bDocData =  (byte[])drDocData["exam_binary"];
        Label1.Text = bDocData.Length.ToString();

       Stream stream = new MemoryStream(bDocData);
       stream.Position = 85;

       bDocData = ReadFully(stream);

        Response.Clear();
        Response.ContentType = "application/msword";
        Response.AddHeader("Content-Disposition", "attachment;filename= insert filename.doc");
        Response.BinaryWrite(bDocData);
        Response.End();
   }

  public static byte[] ReadFully(Stream input)
    {
        byte[] buffer = new byte[16 * 1024];
        using (MemoryStream ms = new MemoryStream())
        {
            int read;
            while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
            {
                ms.Write(buffer, 0, read);
            }
            return ms.ToArray();
        }

Answer 1

试试这个

//Create a dummy GridView
GridView GridView1 = new GridView();
GridView1.AllowPaging = false;
GridView1.DataSource = dsData.Tables[1];//Assign datatable to gridview source
GridView1.DataBind();

Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition",
    "attachment;filename=DataTable.doc");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-word ";
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.RenderControl(hw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();