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所以我的 Asp.Net 网站上发生了一些非常奇怪的事情。

我有 2 个具有相同代码的单独页面来下载存储在 SQL 数据库中的文件。

一个页面是页面的管理员版本,您可以在其中删除和上传文件,还可以查看文件 ID。

此页面的用户端版本仅显示下载按钮和文件名。ID 被隐藏并用作网格中的 DataKey 以从数据库中选择文件。

两个页面都在开发中完美运行。但是当我切换到我们的生产登台服务器时,页面的用户端版本在保存和打开时会将一个简单的单行文本文件变成一堆 gargly-goop PDF 编码,而页面的管理版本仍然可以正常运行。PDF 的下载和查看普通文档和 word 文档的功能与文本文件相同。

这是管理员下载部分的代码:

protected void btnSaveAttachment_Click(object sender, EventArgs e)
    {
        GridViewRow selectedRow = ((LinkButton)sender).NamingContainer as GridViewRow;

        string AttachmentID = "";
        string AttachmentName = "";
        if (selectedRow.Cells[1].Text != null && selectedRow.Cells[2].Text != null)
        {
            AttachmentID = selectedRow.Cells[1].Text;
            AttachmentName = selectedRow.Cells[2].Text;
        }

        byte[] objData = Utility.SaveAttachmentBytes(AttachmentID);

        HttpResponse response = HttpContext.Current.Response;
        response.ClearContent();
        response.Clear();
        response.ClearHeaders();
        response.AddHeader("Cache-Control", " no-store, no-cache ");
        response.AddHeader("Content-Disposition", "attachment; filename=" + AttachmentName + ";");
        response.BinaryWrite(objData);
        response.Flush();

        if (response != null)
        {
            response.End();
        }

    }

这是用户下载部分的代码:

protected void btnSaveAttachment_Click(object sender, EventArgs e)
    {
        GridViewRow selectedRow = ((LinkButton)sender).NamingContainer as GridViewRow;

        //string AttachmentID = selectedRow.Cells[1].Text;
        string AttachmentID = grdAttachments.DataKeys[0].Value.ToString();
        string AttachmentName = "";
        if (selectedRow.Cells[1].Text != null)
        {
            AttachmentName = selectedRow.Cells[1].Text;
        }

        byte[] objData = Utility.SaveAttachmentBytes(AttachmentID);

        HttpResponse response = HttpContext.Current.Response;
        response.ClearContent();
        response.Clear();
        response.ClearHeaders();
        response.AddHeader("Cache-Control", " no-store, no-cache ");
        response.AddHeader("Content-Disposition", "attachment; filename=" + AttachmentName + ";");
        response.BinaryWrite(objData);
        response.Flush();

        //File.Delete(SavePath);

        if (response != null)
        {
            response.End();
        }
    }

我正处于一个我不知道到底发生了什么的地步。页面前端代码中唯一的其他区别是用户页面将一些文本从数据库加载到标签中,并具有 Telerik 文本框控件。(我已尝试删除页面上的所有其他项目,但除 PDF 之外的文件仍尝试编码为 PDF。)

这是保存和打开 1 行文本文件时的样子。

%PDF-1.4
%âãÏÓ
9 0 obj<</H[516 160]/Linearized 1/E 5419/L 14363/N 2/O 12/T 14137>>
endobj

xref
9 11
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0000000676 00000 n
0000000516 00000 n
0000000753 00000 n
0000000881 00000 n
0000000976 00000 n
0000001511 00000 n
0000001903 00000 n
0000002142 00000 n
0000002387 00000 n
0000002463 00000 n
trailer
<</Size 20/Prev 14127/Root 10 0 R/Info 8 0 R/ID[<3d8f2faf909b30f75011a461bd4aff97><b62071c85b58ab4d8f0b23af1811506f>]>>
startxref
0
%%EOF

11 0 obj<</Length 82/Filter/FlateDecode/L 90/S 53>>stream
xÚb```f``
‘BVœÀ   cf`aàXÀàΰ…Ql
HT  ÈAPÌÀàÃÀÃì ,³Ñ†Ë`%·Hˆ…Aý!fb€  O{Ì
endstream
endobj
10 0 obj<</Pages 6 0 R/Type/Catalog/PageLabels 4 0 R/Metadata 7 0 R>>
endobj
12 0 obj<</Contents 19 0 R/Type/Page/Parent 6 0 R/Rotate 0/MediaBox[0 0 612 792]/CropBox[0 0 612 792]/Resources 13 0 R>>
endobj
13 0 obj<</Font<</TT2 14 0 R/TT4 15 0 R>>/ProcSet[/PDF/Text]/ExtGState<</GS1 18 0 R>>>>
endobj
14 0 obj<</Type/Font/Encoding/WinAnsiEncoding/BaseFont/TimesNewRomanPSMT/FirstChar 32/LastChar 150/Subtype/TrueType/FontDescriptor 16 0 R/Widths[250 0 0 0 0 833 778 0 333 333 0 564 250 333 250 278 500 500 500 500 500 500 500 500 500 500 278 0 0 0 0 0 0 722 667 667 722 611 556 722 0 333 389 0 611 889 722 722 556 722 667 556 611 722 722 944 722 722 0 0 0 0 0 0 0 444 500 444 500 444 333 500 500 278 278 500 278 778 500 500 500 500 333 389 278 500 500 722 500 500 444 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 500]>>
endobj
15 0 obj<</Type/Font/Encoding/WinAnsiEncoding/BaseFont/TimesNewRomanPS-BoldMT/FirstChar 32/LastChar 121/Subtype/TrueType/FontDescriptor 17 0 R/Widths[250 0 0 0 0 0 0 0 0 0 0 0 0 0 250 0 500 500 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 722 722 0 0 0 0 389 0 0 0 0 0 778 0 0 0 556 667 722 0 0 0 0 0 0 0 0 0 0 0 500 0 444 0 444 333 500 0 278 0 0 0 833 556 0 0 0 444 389 333 556 500 722 0 500]>>
endobj
16 0 obj<</Type/FontDescriptor/FontBBox[-568 -307 2028 1007]/FontName/TimesNewRomanPSMT/Flags 34/StemV 82/CapHeight 656/XHeight 0/Ascent 891/Descent -216/ItalicAngle 0/FontFamily(Times New Roman)/FontStretch/Normal/FontWeight 400>>
endobj
17 0 obj<</Type/FontDescriptor/FontBBox[-558 -307 2034 1026]/FontName/TimesNewRomanPS-BoldMT/Flags 34/StemV 136/CapHeight 656/XHeight 0/Ascent 891/Descent -216/ItalicAngle 0/FontFamily(Times New Roman)/FontStretch/Normal/FontWeight 700>>
endobj
18 0 obj<</Type/ExtGState/SA false/OP false/SM 0.02/op false/OPM 1>>
endobj

etc....................

endstream
endobj
4 0 obj<</Nums[0 5 0 R]>>
endobj
5 0 obj<</S/D>>
endobj
6 0 obj<</Count 2/Kids[12 0 R 1 0 R]/Type/Pages>>
endobj
7 0 obj<</Length 3339/Type/Metadata/Subtype/XML>>stream
<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
<?adobe-xap-filters esc="CRLF"?>
<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='XMP toolkit 2.9.1-13, framework 1.6'>
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:iX='http://ns.adobe.com/iX/1.0/'>
<rdf:Description rdf:about='uuid:d5ef0fdf-fd89-4be0-a57d-fcab92aa8d2b' xmlns:pdf='http://ns.adobe.com/pdf/1.3/' pdf:Producer='Acrobat Distiller 6.0 (Windows)'></rdf:Description>
<rdf:Description rdf:about='uuid:d5ef0fdf-fd89-4be0-a57d-fcab92aa8d2b' xmlns:xap='http://ns.adobe.com/xap/1.0/' xap:CreatorTool='PScript5.dll Version 5.2' xap:ModifyDate='2005-06-10T14:07:36-04:00' xap:CreateDate='2005-06-10T14:07:36-04:00'></rdf:Description>
<rdf:Description rdf:about='uuid:d5ef0fdf-fd89-4be0-a57d-fcab92aa8d2b' xmlns:xapMM='http://ns.adobe.com/xap/1.0/mm/' xapMM:DocumentID='uuid:2aee5402-c607-44cd-a815-8ad3a0bf0a56'/>
<rdf:Description rdf:about='uuid:d5ef0fdf-fd89-4be0-a57d-fcab92aa8d2b' xmlns:dc='http://purl.org/dc/elements/1.1/' dc:format='application/pdf'><dc:title><rdf:Alt><rdf:li xml:lang='x-default'>Microsoft Word - 1 - DTOD Overview.doc</rdf:li></rdf:Alt></dc:title><dc:creator><rdf:Seq><rdf:li>AttardA</rdf:li></rdf:Seq></dc:creator></rdf:Description>
</rdf:RDF>
</x:xmpmeta>                 
<?xpacket end='w'?>
endstream
endobj
8 0 obj<</ModDate(D:20050610140736-04'00')/CreationDate(D:20050610140736-04'00')/Title(Microsoft Word - 1 - DTOD Overview.doc)/Creator(PScript5.dll Version 5.2)/Producer(Acrobat Distiller 6.0 \(Windows\))/Author(AttardA)>>
endobj
xref
0 9
0000000000 65535 f
0000005419 00000 n
0000005544 00000 n
0000005638 00000 n
0000010369 00000 n
0000010402 00000 n
0000010425 00000 n
0000010482 00000 n
0000013897 00000 n
trailer
<</Size 9>>
startxref
116
%%EOF

解决

问题是 DataKeys[0] 总是选择键数组中的 0 项。我将其更改为:

string AttachmentID = grdAttachments.DataKeys[selectedRow.RowIndex].Value.ToString();

现在一切正常!希望我能更深入地调试附件ID!

碰巧有两个文件是相同的,我虽然下载的是正确的文件。

4

1 回答 1

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在您的管理部分:

string AttachmentID = selectedRow.Cells[1].Text;

在您的用户部分:

string AttachmentID = grdAttachments.DataKeys[0].Value.ToString();

我不得不假设用户部分分配没有按照您的预期进行,因为两者的逻辑不同。验证每种情况下的 AttachmentID 设置,可能是通过日志记录。

于 2013-06-04T17:12:24.097 回答