c# - 不同的用户不能同时使用我的 WinForms 应用程序

Question

我有一个 VS WinForms 应用程序，它使用 OleDB 从 Excel 文件读取(仅读取，不写入)信息。我的最终用户通过单击一次安装该程序，该程序是通过 Visual Studio 社区中的发布选项创建的。安装工作正常。但是:一次只有一名用户能够使用该程序。 Windows 给我这个错误:

Files that may help descibe the problem:
  C:\Users\shoo\AppData\Local\Temp\WERA825.tmp.WERInternalMetadata.xml
  C:\Users\shoo\AppData\Local\Temp\WERDFAA.tmp.appcompat.txt
  C:\Users\shoo\AppData\Local\Temp\WERE18F.tmp.mdmp

这些文件都包含相同的信息:

    <?xml version="1.0" encoding="UTF-16"?>
<DATABASE>
<EXE NAME="Streetlife Database Lookup.exe" FILTER="CMI_FILTER_PRIVACY">
    <MATCHING_FILE NAME="lcpi.data.oledb.net4.dll" SIZE="841728" CHECKSUM="0x4AEF1CA6" BIN_FILE_VERSION="1.0.1.2490" BIN_PRODUCT_VERSION="1.0.1.2490" PRODUCT_VERSION="1.0.1.2490" FILE_DESCRIPTION="LCPI ADO.NET Data Provider for OLE DB [NET4]" COMPANY_NAME="LCPI" PRODUCT_NAME="lcpi.data.oledb" FILE_VERSION="1.0.1.2490" ORIGINAL_FILENAME="lcpi.data.oledb.net4.dll" INTERNAL_NAME="lcpi.data.oledb.net4.dll" LEGAL_COPYRIGHT="Copyright © LCPI 2011-2015" VERDATEHI="0x0" VERDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0xD742F" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="1.0.1.2490" UPTO_BIN_PRODUCT_VERSION="1.0.1.2490" LINK_DATE="08/06/2015 14:05:40" UPTO_LINK_DATE="08/06/2015 14:05:40" VER_LANGUAGE="Taalonafhankelijk [0x0]" EXE_WRAPPER="0x0" />
    <MATCHING_FILE NAME="lcpi.lib.net4.dll" SIZE="347136" CHECKSUM="0x3345E399" BIN_FILE_VERSION="1.0.0.1224" BIN_PRODUCT_VERSION="1.0.0.1224" PRODUCT_VERSION="1.0.0.1224" FILE_DESCRIPTION="LCPI Instrumental Library for .NET 4" COMPANY_NAME="LCPI" PRODUCT_NAME="lcpi.lib" FILE_VERSION="1.0.0.1224" ORIGINAL_FILENAME="lcpi.lib.net4.dll" INTERNAL_NAME="lcpi.lib.net4.dll" LEGAL_COPYRIGHT="Copyright © LCPI 2011-2015" VERDATEHI="0x0" VERDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0x5AFBE" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="1.0.0.1224" UPTO_BIN_PRODUCT_VERSION="1.0.0.1224" LINK_DATE="08/06/2015 14:05:39" UPTO_LINK_DATE="08/06/2015 14:05:39" VER_LANGUAGE="Taalonafhankelijk [0x0]" EXE_WRAPPER="0x0" />
    <MATCHING_FILE NAME="Microsoft.VisualStudio.OLE.Interop.dll" SIZE="118784" CHECKSUM="0xE2A9E029" BIN_FILE_VERSION="7.10.6070.0" BIN_PRODUCT_VERSION="7.10.6070.0" PRODUCT_VERSION="7.10.6070" FILE_DESCRIPTION="" COMPANY_NAME="Microsoft Corporation" PRODUCT_NAME="Microsoft® Visual Studio .NET" FILE_VERSION="7.10.6070" ORIGINAL_FILENAME="" INTERNAL_NAME="" LEGAL_COPYRIGHT="Copyright© Microsoft Corporation.  All rights reserved." VERDATEHI="0x0" VERDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0x2C347" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="7.10.6070.0" UPTO_BIN_PRODUCT_VERSION="7.10.6070.0" LINK_DATE="08/24/2009 12:53:35" UPTO_LINK_DATE="08/24/2009 12:53:35" VER_LANGUAGE="Engels (Verenigde Staten) [0x409]" EXE_WRAPPER="0x0" />
    <MATCHING_FILE NAME="Streetlife Database Lookup.exe" SIZE="125376" CHECKSUM="0x5042252" BIN_FILE_VERSION="1.0.0.0" BIN_PRODUCT_VERSION="1.0.0.0" PRODUCT_VERSION="1.0.0.0" FILE_DESCRIPTION="WindowsFormsApplication1" COMPANY_NAME="Streetlife" PRODUCT_NAME="Streetlife Databse Lookup" FILE_VERSION="1.0.0.0" ORIGINAL_FILENAME="Streetlife Database Lookup.exe" INTERNAL_NAME="Streetlife Database Lookup.exe" LEGAL_COPYRIGHT="Copyright © SHOO;-)" VERDATEHI="0x0" VERDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x1" MODULE_TYPE="WIN32" PE_CHECKSUM="0x2CFAE" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="1.0.0.0" UPTO_BIN_PRODUCT_VERSION="1.0.0.0" LINK_DATE="08/27/2015 10:24:53" UPTO_LINK_DATE="08/27/2015 10:24:53" VER_LANGUAGE="Taalonafhankelijk [0x0]" EXE_WRAPPER="0x0" FILE_ID="00005974d6b5b0b5a80644936a6ef12feedfa35a97e3" PROGRAM_ID="0000da39a3ee5e6b4b0d3255bfef95601890afd80709" />
</EXE>
<EXE NAME="KERNELBASE.dll" FILTER="CMI_FILTER_THISFILEONLY">
    <MATCHING_FILE NAME="KernelBase.dll" SIZE="424448" CHECKSUM="0xBE7BDE30" BIN_FILE_VERSION="6.1.7601.18939" BIN_PRODUCT_VERSION="6.1.7601.18939" PRODUCT_VERSION="6.1.7601.18015" FILE_DESCRIPTION="DLL-bestand voor Windows NT BASE API-client" COMPANY_NAME="Microsoft Corporation" PRODUCT_NAME="Besturingssysteem Microsoft® Windows®" FILE_VERSION="6.1.7601.18015 (win7sp1_gdr.121129-1432)" ORIGINAL_FILENAME="Kernelbase" INTERNAL_NAME="Kernelbase" LEGAL_COPYRIGHT="© Microsoft Corporation. Alle rechten voorbehouden." VERDATEHI="0x0" VERDATELO="0x0" VERFILEOS="0x40004" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0x70CFC" LINKER_VERSION="0x60001" UPTO_BIN_FILE_VERSION="6.1.7601.18939" UPTO_BIN_PRODUCT_VERSION="6.1.7601.18939" LINK_DATE="07/22/2015 23:59:55" UPTO_LINK_DATE="07/22/2015 23:59:55" EXPORT_NAME="KERNELBASE.dll" VER_LANGUAGE="Nederlands (Nederland) [0x413]" EXE_WRAPPER="0x0" />
</EXE>
<EXE NAME="kernel32.dll" FILTER="CMI_FILTER_THISFILEONLY">
    <MATCHING_FILE NAME="kernel32.dll" SIZE="1163264" CHECKSUM="0x1FD0A6B3" BIN_FILE_VERSION="6.1.7601.18939" BIN_PRODUCT_VERSION="6.1.7601.18939" PRODUCT_VERSION="6.1.7601.18015" FILE_DESCRIPTION="DLL-bestand voor Windows NT BASE API-client" COMPANY_NAME="Microsoft Corporation" PRODUCT_NAME="Besturingssysteem Microsoft® Windows®" FILE_VERSION="6.1.7601.18015 (win7sp1_gdr.121129-1432)" ORIGINAL_FILENAME="kernel32" INTERNAL_NAME="kernel32" LEGAL_COPYRIGHT="© Microsoft Corporation. Alle rechten voorbehouden." VERDATEHI="0x0" VERDATELO="0x0" VERFILEOS="0x40004" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0x12A426" LINKER_VERSION="0x60001" UPTO_BIN_FILE_VERSION="6.1.7601.18939" UPTO_BIN_PRODUCT_VERSION="6.1.7601.18939" LINK_DATE="07/22/2015 23:59:54" UPTO_LINK_DATE="07/22/2015 23:59:54" EXPORT_NAME="KERNEL32.dll" VER_LANGUAGE="Nederlands (Nederland) [0x413]" EXE_WRAPPER="0x0" />
</EXE>
</DATABASE>

我已执行以下操作来帮助避免该错误:

• 我只读取了 Excel 文件，并将实际的 Excel 文件设为只读。
• 在填写数据集或使用阅读器后，我会直接关闭所有连接。
• 不带 OleDB 并通过发布>单击一次进行分发的 WinForms 应用程序可同时供多个用户使用。
• 如果我开始一个新项目，请复制/粘贴我的所有代码(因此它完全相同，但应用程序名称不同):我的程序的两个实例可以同时运行...<

这是我第一次体验 C#，所以请保持温柔;-)

Answer 1

我认为问题在于，当您打开 Excel 文件时，它会创建一个“锁”。通常，如果您通过 MS Excel 界面执行此操作，它会提示您警告，您可以选择要执行的操作 See here 。但在本例中，由于您是从 C# 程序读取它，因此它可能会返回奇怪的错误

我建议您尝试将主文件存储在网络驱动器上，并将其本地复制到应用程序文件夹，以便每个用户使用自己的文件，而不是立即读取同一文件。 See here for file copying

尝试以下代码

string filename = "Streetlife Product Database.xlsx";
string fullfilename = String.Format(@"//MILKYWAY/SO_Arc/template/{1}", Application.StartupPath, filename);
string tempath = System.IO.Path.GetTempPath();
string filenameTemp = String.Format("{0}.xlsx", System.IO.Path.GetTempFileName());
System.IO.File.Copy(fullfilename, filenameTemp, true);
string connetionString = String.Format(@"Provider = Microsoft.ACE.OLEDB.12.0; Data Source ={0};Extended Properties = ""Excel 12.0 Xml;HDR=YES;IMEX=1""", filenameTemp);

using (OleDbConnection oledb = new OleDbConnection(connetionString))
{
    try
    {
        oledb.Open();
    }
    catch (Exception ex)
    {
        oledb.Close();
        oledb.Dispose();

        MessageBox.Show("Error trying to read file: " + ex.Message);                    
    }
 }