从docx获取项目符号列表的问题

Question

我正在尝试使用C＃从docx获取项目符号列表，但是，输出得到一个奇怪的符号或矩形，在“”内部带有问号，而不是项目符号。以下是我用于获取项目符号值的代码段，但它不起作用：

 

Application word = new Application ();
Document doc = new Document ();
object fileName = @"D:\testing\Sample_2.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);

for (int i = 0; i < doc.Paragraphs.Count; i++) {
    string bullet = doc.Paragraphs[i + 1].Range.ListFormat.ListString;
}
((_Document) doc).Close ();
((_Application) word).Quit ();