Question

I use this code to get a String array of headings used in a MS Word 2007 document (.docx):

dynamic arr = Document.GetCrossReferenceItems(WdReferenceType.wdRefTypeHeading);

Using the debugger, I see that arr is dynamically assigned a String array with titles of all my headings in the document (about 40 entries). So far so good.

Then, I want to access the strings, but no matter how I do it, I get the following exception:

InvalidCastException: 
           Unable to cast object of type 'System.String[*]' to type 'System.String[]'.

I have tried different ways of accessing the strings:

By index:

String arr_elem = arr[1];

By casting to an IEnumerable:

IEnumerable list = (IEnumerable)arr;

By using a simple foreach loop:

foreach (String str in arr)
{
   Console.WriteLine(str);
}

However, no matter what I try, I always end up with the same exception as shown above.

Can anyone explain what I am missing here / what I am doing wrong? And especially String[*] – what does it mean?

Answer 1

try

object arr_r = Document.GetCrossReferenceItems(WdReferenceType.wdRefTypeHeading);
Array arr = ((Array) (arr_r));

string myHeading = (string) arr.GetValue(1);