InterOp COM error - C# 2.0 - Office 2003

Question

Using VS 2005 RC1 and Office 2003 11.6568.6568 SP2.

In the following short class, when I call the GetSpellingSuggestions I get this error:
"Hresult: 0x80010105 RPC_E_SERVERFAULT"

I'm running as User (as opposed to Admin/Power User). if I Run As as an Admin I get the same error. Im using Windows XP SP2.

public class CheckSpelling { private static CheckSpelling spellChecker; private Microsoft.Office.Interop.Word.Application wordApp; // private Microsoft.Office.Interop.Word.ApplicationClass wordApp; /// <summary> /// Singleton instance /// </summary> public static CheckSpelling SpellChecker { get { if (CheckSpelling.spellChecker == null) { CheckSpelling.spellChecker = new CheckSpelling(); } return CheckSpelling.spellChecker; } } /// <summary> /// For static which need initializing /// </summary> static CheckSpelling() { } /// <summary> /// Private for singleton /// </summary> private CheckSpelling() { wordApp = new ApplicationClass(); } /// <summary> /// Checks a single word for misspelling. The return value indicates true for misspelling or false for correct spelling. The output parameter will have the suggestions if misspelled. /// </summary> /// <param name="word">The word that needs checking. Any whitespace will cause only the preceding text to be searched</param> /// <param name="suggestions">If the word is misspelled , this array will have the suggusted fixes.</param> /// <returns>ture if misspelled, false if correctly spelled</returns> public bool CheckWordIsMisspelled(string word, out string[] suggestions) { try { object nada = Type.Missing; object falseObject = false; object wordType = WdSpellingWordType.wdSpellword; SpellingSuggestions spellingSuggestions = wordApp.GetSpellingSuggestions(word, ref nada, ref falseObject, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada); if (spellingSuggestions.Count > 0) { string[] results = new string[spellingSuggestions.Count]; for (int i = 0; i < spellingSuggestions.Count; i++) { results = spellingSuggestions.ToString(); } suggestions = results; return true; } else { suggestions = null; return false; } } catch(System.Runtime.InteropServices.COMException com) { throw com; } catch(Exception ex) { throw ex; } }   }

Answer 1

Word's GetSpellingSuggestions method won't work unless you have at least one open document. One simple solution is to create a new document in the constructor of your CheckSpelling class, as shown below.

Also, the code in your CheckWordIsMisspelled method is incorrect: the SpellingSuggestions collection is 1-based, and it's not clear from your post what you're assigning each element to (lightbulbs in your post). Corrected code below.

private CheckSpelling()

{

wordApp = new Microsoft.Office.Interop.Word.Application();

// Call this in order for GetSpellingSuggestions to work later

object missing = Type.Missing;

wordApp.Documents.Add(ref missing, ref missing, ref missing, ref missing);

}

public bool CheckWordIsMisspelled(string word, out string[] suggestions)

{

suggestions = null;

bool retval = false;

try

{

object nada = Type.Missing;

object falseObject = false;

object wordType = WdSpellingWordType.wdSpellword;

SpellingSuggestions spellingSuggestions = wordApp.GetSpellingSuggestions(

word, ref nada, ref falseObject, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada, ref nada);

if (spellingSuggestions.Count > 0)

{

string[] results = new string[spellingSuggestions.Count];

for (int i = 0; i < spellingSuggestions.Count; i++)

{

results = spellingSuggestions[i+1].Name;

}

suggestions = results;

return retval;

}

}

catch (Exception)

{

throw;

}

return retval;

}