使用c#读取Word文档

我需要从一个特定的点开始阅读word文档。 该关键字取自下拉组合框。 关键字类似于 [blah blah, blah, 001]

所以，我只需要阅读从该关键字到下一个标题的内容......

我用它来逐行读取标题编号 但标题编号不起作用

string headNum = objparagraph.Range.ListFormat.ListString;
string sLine = objparagraph.Range.Text;

       Word.Application word = new Word.Application();
       Word.Document doc = new Word.Document();
       object fileName = @"C:\wordFile.docx";
        // Define an object to pass to the API for missing parameters
        object missing = System.Type.Missing;                
        doc = word.Documents.Open(ref fileName,
                ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing);
        string ReadValue = string.Empty;
            // Activate the document
        doc.Activate();

         foreach (Word.Range tmpRange in doc.StoryRanges)
         {
            ReadValue += tmpRange.Text;
         }