How to: Load a User-Specific Dictionary and Update It During Spell Check

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A custom dictionary for ASPxSpellChecker can be specified in the page markup or created in the code-behind file. This dictionary is the same for different users. Words added to a custom dictionary during a spell check are stored in a session cache, so the original custom dictionary remains intact.

This article demonstrates how to load a dictionary that is specific to a particular user. The user has the ability to extend this dictionary. To accomplish this task, you should handle two ASPxSpellChecker events - the ASPxSpellChecker.CustomDictionaryLoading event and the ASPxSpellChecker.WordAdded event.

CustomDictionaryLoading Event

The following code snippet illustrates that you can handle the ASPxSpellChecker.CustomDictionaryLoading event to load a custom dictionary from a stream. Note that the ASPxSpellChecker control already has an ASPxSpellCheckerCustomDictionary object in its collection of dictionaries. When the custom dictionary is loading, it fires an event allowing you to load a user-specific dictionary.

View Example

using DevExpress.Web.ASPxSpellChecker;
using DevExpress.XtraSpellChecker;
        protected void ASPxSpellChecker1_CustomDictionaryLoading(object sender, CustomDictionaryLoadingEventArgs e) {

            FileStream alphStream = new FileStream(Server.MapPath(e.CustomDictionary.AlphabetPath), FileMode.Open, FileAccess.Read);
            FileStream dicStream = new FileStream(userDictPath, FileMode.OpenOrCreate, FileAccess.Read);
            try {
                alphStream.Seek(0, SeekOrigin.Begin);
                dicStream.Seek(0, SeekOrigin.Begin);
                e.CustomDictionary.LoadFromStream(dicStream, alphStream);
            }
            finally {
                alphStream.Dispose();
                dicStream.Dispose();
            }
        }

WordAdded Event

This code illustrates that you can handle the ASPxSpellChecker.WordAdded event to save an updated custom dictionary to the original location. The ASPxSpellChecker.GetCustomDictionary method enables you to access a custom dictionary that is currently in use.

View Example

using DevExpress.Web.ASPxSpellChecker;
using DevExpress.XtraSpellChecker;
        protected void ASPxSpellChecker1_WordAdded(object sender, WordAddedEventArgs e) {
            ASPxSpellChecker checker = sender as ASPxSpellChecker;
            SpellCheckerCustomDictionary dic = checker.GetCustomDictionary();
            if (dic != null) {
                StringBuilder stb = new StringBuilder();
                for (int i = 0; i < dic.WordCount; i++)
                    stb.AppendLine(dic[i]);
                using (StreamWriter writer = new StreamWriter(userDictPath)) {
                    writer.Write(stb.ToString());
                }
            }
        }
See Also