Word文档中的页数 [英] Page Count in Word doc

问题描述

在我将项目移至服务器之前，每件事在我的本地计算机上都运行良好，现在在进行页面计数时，错误如下:

对象引用未设置为对象的实例.

Every thing was working fine on my local till i moved my project to the server and now while doing a page count it gives error as:

Object reference not set to an instance of an object.

Microsoft.Office.Interop.Word.WdStatistic stat = Microsoft.Office.Interop.Word.WdStatistic.wdStatisticPages;
                      count = aDoc.ComputeStatistics(stat, ref missing);//this is the place where im getting this error.

相同的代码在localhost上可以正常工作.

The same code works fine on the localhost.

Microsoft.Office.Interop.Word.ApplicationClass WordApp = new Microsoft.Office.Interop.Word.ApplicationClass();


                                  // give any file name of your choice.
                                  string tempath = numberofpage;
                                  RegexOptions options = RegexOptions.None;
                                  Regex regex = new Regex(@"[ ]{2,}", options);
                                  tempath = regex.Replace(tempath, @"");
                                  tempath = tempath.Replace(" \\", "\\");
                                  object fileName = tempath;
                                  object readOnly = false;
                                  object isVisible = true;

                                  //  the way to handle parameters you don't care about in .NET
                                  object missing = System.Reflection.Missing.Value;
                                  object objDNS = Microsoft.Office.Interop.Word.WdSaveOptions.wdDoNotSaveChanges;

                                  //   Make word visible, so you can see what's happening
                                  //WordApp.Visible = true;
                                  //   Open the document that was chosen by the dialog
                                  Microsoft.Office.Interop.Word.Document aDoc = WordApp.Documents.Open(ref fileName,
                                                          ref missing, ref readOnly, ref missing,
                                                          ref missing, ref missing, ref missing,
                                                          ref missing, ref missing, ref missing,
                                                              ref missing, ref isVisible);

                                  Microsoft.Office.Interop.Word.WdStatistic stat = Microsoft.Office.Interop.Word.WdStatistic.wdStatisticPages;
                                  count = aDoc.ComputeStatistics(stat, ref missing);

                                  WordApp.Quit(ref objDNS, ref missing, ref missing);

                                  aDoc = null;

                                  WordApp = null;

                                  GC.Collect();

可能是问题的解决方法

What could be issue and fix

推荐答案

此异常是最容易检测和修复的异常之一.它仅表示某些引用类型变量为null，最有可能是aDoc.太糟糕了，您没有显示上面的代码.

不用担心:在调试器中以这些行的断点执行它.当执行在该断点处停止时，请检查这些值.如果引用之一必须为非null，但实际上为null，请检查它是如何发生的.通常，请确保使用非空值正确初始化了引用(调用了构造函数或工厂方法，返回并使用了值)，或者检查变量或成员是否为空，如果为空，根据您的逻辑做其他事情.

—SA

This exception is one of the easiest to detect and fix. It simply means that some reference-type variable is null, and most likely this is aDoc. Too bad you did not show the code above.

Not to worry: execute it under debugger with a break point of these line. When execution stops on that break point, examine the values. If one of the reference is required to be non-null but in fact is null, check up how it happens. Generally, either make sure the reference is properly initialized with non-null value (constructor or factory method is called, value returned and used), or, alternatively, check up a variable or a member for null, and, in case of null, do something else, according to your logic.

—SA

我认为，您需要在服务器上安装word并可能分配适当的访问权限.

查看以下链接是否有帮助.
http://support.microsoft.com/kb/257757 [

I think, You need to install word on the server and probably assign appropriate access.

see if following link helps.
http://support.microsoft.com/kb/257757[^]

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