不同的用户无法同时使用我的WinForms应用

时间:2015-09-23 11:55:22

标签: c# excel winforms oledb multiple-users

我有一个VS WinForms应用程序,它使用OleDB从Excel文件中读取(仅读取,不写入)信息。我的最终用户通过Click-once安装程序,通过Visual Studio社区中的publish-option创建。安装工作正常。但是:一次只能有一个用户使用该程序。 Windows给了我这个错误:

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>

我已完成以下操作以帮助避免错误:

  • 我只阅读了Excel文件,并将实际的Excel文件设为只读。
  • 在填写数据集或使用读者后,我会直接关闭所有连接。
  • 没有OleDB并通过发布&gt; Click-once分发的WinForms应用程序同时适用于多个用户。
  • 如果我开始一个新项目,复制/粘贴我的所有代码(所以它完全相同,但app-name是不同的):我的程序的两个实例可以同时运行...

这是我的第一次C#体验,所以请保持温和; - )

2 个答案:

答案 0 :(得分:2)

我认为问题是当你打开一个excel文件时,它会创建一个“锁定”。通常,如果您通过MS Excel界面执行此操作,它将提示您一个警告,您可以选择要执行的操作See here。但在这种情况下,由于你是从C#程序中读取它,它可能会返回那个奇怪的错误

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中,以便每个用户使用自己的文件而不是一次读取同一文件。 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);                    
    }
 }

答案 1 :(得分:0)

您似乎只能与某个文件建立一个OleDB连接。因此,当一个用户连接到该文件时,另一个用户不能。

  

可悲的是,OleDB驱动程序默认情况下会以独占方式打开文件,然后当别人正在使用它时,您就无法打开它,即使只是为了阅读。

取自Read Excel file with OleDB c#, when it is used by other process

现在我将(母)excel文件复制到用户计算机上的临时位置,并连接到那里的temp(子)文件。这似乎有效,但我不能放弃正确的代码。

到目前为止,我有这个:

 string filename = @"//MILKYWAY/SO_Arc/template/Streetlife Product Database.xlsx";
            string filenameTemp = System.IO.Path.GetTempFileName();
            System.IO.File.Copy(filename, filenameTemp, true);
            string connetionString = @"Provider = Microsoft.ACE.OLEDB.12.0; Data Source =" + filenameTemp + ";Extended Properties = 'Excel 12.0 Xml;HDR=YES;IMEX=1'";