Question

I m试图写到文字档案中,然后下载该档案,而没有把档案保存到硬盘上。使用<代码>StringWriter书写内容:

StringWriter oStringWriter = new StringWriter();
oStringWriter.Write("This is the content");

How do I then download this file?

EDIT: It was combination of answers which gave me my solution. Here it is:

StringWriter oStringWriter = new StringWriter();
oStringWriter.WriteLine("Line 1");
Response.ContentType = "text/plain";

Response.AddHeader("content-disposition", "attachment;filename=" + string.Format("members-{0}.csv",string.Format("{0:ddMMyyyy}",DateTime.Today)));
Response.Clear();

using (StreamWriter writer = new StreamWriter(Response.OutputStream, Encoding.UTF8))
{
    writer.Write(oStringWriter.ToString());
}
Response.End();

Answer 1

您不能将数据储存在记忆中,然后将数据发送到回复流中,而是可以直接写到答复流:

using (StreamWriter writer = new StreamWriter(Response.OutputStream, Encoding.UTF8)) {
  writer.Write("This is the content");
}

例如使用UTF-8编码,你应当改变,如果你使用其他一些编码。

Answer 2

This solved for me:

        MemoryStream ms = new MemoryStream();
        TextWriter tw = new StreamWriter(ms);
        tw.WriteLine("Line 1");
        tw.WriteLine("Line 2");
        tw.WriteLine("Line 3");
        tw.Flush();
        byte[] bytes = ms.ToArray();
        ms.Close();

        Response.Clear();
        Response.ContentType = "application/force-download";
        Response.AddHeader("content-disposition", "attachment;    filename=file.txt");
        Response.BinaryWrite(bytes);
        Response.End();

Answer 3

http://msdn.microsoft.com/en-us/library/system.web.i httphandler.aspx>IHttpHandler 接口。在<代码>ProcessRequest方法中,你基本把案文写到context。反应。页: 1



context.Response.AddHeader("Content-Disposition", "attachment; filename=YourFileName.txt");


还记得制定了<代码>。 内容提要

context.Response.ContentType = "text/plain";

Answer 4


仅略加补充其他答复。 在下载结束时,我执行:

context.Response.Flush();
context.ApplicationInstance.CompleteRequest();


I learned that otherwise, the download sometimes does not complete successfully.

该谷歌集团张贴也指出<代码>Response。 End sediments a ThreadAbortException, 你可以通过使用加以避免。完整的Request方法。

Answer 5

我有很多问题。 Finnaly找到了一种似乎每小时工作的解决办法。

在大多数情况下,用户将点击一个纽州进行下载。此时最好将网页重新贴上同一地点。在座标上添加一个参数,供你 gr和读。

例如(www.about where.com/mypage.aspx?print=stuff)

    <asp:Button ID="btn" runat="server" Text="print something" OnClick="btn_Click" />


    protected void Page_Load(object sender, EventArgs e) {
        if (Request["print"] == "stuff") { Print("my test content"); }
    }

    /* or pass byte[] content*/
    private void Print(string content ){ 
        Response.ContentType = "text/plain";
        Response.AddHeader("content-disposition", "attachment;filename=myFile.txt");
        // Response.BinaryWrite(content);
        Response.Write(content);
        Response.Flush(); 
        Response.End();
    }

    protected void btn_Click(object sender, EventArgs e) {
        // postbacks give you troubles if using async.
        // Will give an error when Response.End() is called.
        Response.Redirect(Request.Url + "?print=queue");
    }

Answer 6

扩大@Vinicious 答案。

我的数据可以包含 com。共同的解决办法是,通过在报价中公布数据来逃避这一数据,同时确保也能够避开可能也是数据组成部分的报价。

在撰写CSV时,我遇到一个 rub,如果你把空间拖到你的mas子上,就会发出警告:。从超级用户答案找到解决我问题的办法

protected void btnDownload_Click(object sender, EventArgs e)
{
    MemoryStream ms = new MemoryStream();
    TextWriter tw = new StreamWriter(ms, System.Text.Encoding.UTF8);
    var structures = KAWSLib.BusinessLayer.Structure.GetStructuresInService();
    // *** comma delimited
    tw.Write("Latitude, Longitude, CountySerial, StructureType, Orientation, District, RoutePre, RouteNo, LocationDesc");
    foreach (var s in structures)
    {
        tw.Write(Environment.NewLine + string.Format("{0:#.000000},{1:#.000000},{2},{3},{4},{5},{6},{7},{8}", s.LATITUDE, s.LONGITUDE, s.CO_SER, EscapeIfNeeded(s.SuperTypeLookup.SHORTDESC), EscapeIfNeeded(s.OrientationLookup.SHORTDESC), s.DISTRICT, s.ROUTE_PREFIX, s.RouteValue, EscapeIfNeeded(s.LOC_DESC)));
    }
    tw.Flush();
    byte[] bytes = ms.ToArray();
    ms.Close();

    Response.Clear();
    Response.ContentType = "application/force-download";
    Response.AddHeader("content-disposition", "attachment;    filename=" + string.Format("kaws-structures-{0:yyyy.MM.dd}.csv", DateTime.Today));
    Response.BinaryWrite(bytes);
    Response.End();
}

string EscapeIfNeeded(string s)
{
    if (s.Contains(","))
    {
        return """ + s.Replace(""", """") + """;
    }
    else
    {
        return s;
    }
}

下面将造成一种问题。在外壳中,第一种报价将成为数据的一部分,因此不单在嵌入的 com上。空间坏。

 tw.Write(Environment.NewLine + string.Format("{0:#.000000}, {1:#.000000}, {2}, {3}, {4}, {5}, {6}, {7}, {8}", s.LATITUDE, s.LONGITUDE, s.CO_SER, EscapeIfNeeded(s.SuperTypeLookup.SHORTDESC), EscapeIfNeeded(s.OrientationLookup.SHORTDESC), s.DISTRICT, s.ROUTE_PREFIX, s.RouteValue, EscapeIfNeeded(s.LOC_DESC)));

Answer 7

答案非常简单,可在Micro KB条中看到:。如何用伙伴关系向浏览器书写双亲文件。 NET和C#

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