Question

我最近完成了一个VB应用程序，并提供了一些帮助，直到现在一直很好。它安装在5台客户端计算机上，但截至今天都突然停止工作，我没有改变任何内容。

应用程序设置为从存储已发布文件的服务器自动更新到最新版本，但这些文件没有更改。

应用程序将一个字符串输入到文本框中，在网络驱动器上搜索该字符串的Excel文件，获取下一列中的数据（这是文件夹的路径）并将其作为字符串存储然后打开文件夹路径。

这是我得到的错误，任何人都可以解雇吗？

谢谢，

杰米

************** Exception Text **************
System.NullReferenceException: Object variable or With block variable not set.
   at Microsoft.VisualBasic.CompilerServices.Symbols.Container..ctor(Object Instance)
   at Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateGet(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack)
   at WindowsApplication1.Form1.GoBut_Click(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.PerformClick()
   at System.Windows.Forms.Form.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.TextBoxBase.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
   at System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
   at System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18063 built by: FX45RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
WD Design App 4.0
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/Users/Duncanw/AppData/Local/Apps/2.0/LP40ZRTD.B6E/7GHED904.9XR/wdde..tion_76dba37807f38e9e_0001.0000_58ddc474ca533ea7/WD%20Design%20App%204.0.exe
----------------------------------------
Microsoft.VisualBasic
    Assembly Version: 10.0.0.0
    Win32 Version: 11.0.50709.17929 built by: FX45RTMREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34238 built by: FX452RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Core
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.17929 built by: FX45RTMREL
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34251 built by: FX452RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.18021 built by: FX45RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Runtime.Remoting
    Assembly Version: 4.0.0.0
    Win32 Version: 4.0.30319.34245 built by: FX452RTMGDR
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Runtime.Remoting/v4.0_4.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
----------------------------------------
Microsoft.Office.Interop.Excel
    Assembly Version: 15.0.0.0
    Win32 Version: 15.0.4737.1003
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Microsoft.Office.Interop.Excel/15.0.0.0__71e9bce111e9429c/Microsoft.Office.Interop.Excel.dll
----------------------------------------
office
    Assembly Version: 15.0.0.0
    Win32 Version: 15.0.4737.1003
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/office/15.0.0.0__71e9bce111e9429c/office.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Answer 1

确保未锁定网络驱动器上的Excel文件访问。尝试使用其他名称进行文件复制并进行测试。
看起来像GoBut_Click函数中出现的错误。评论从底部开始代码行找到错误的行出现。

VB - 运行搜索时出错

1 个答案: