Too many items for Javascript to handle in a Callback

[sitefinitysteve]

I'm using the following demo to load Combo items from a DB which I don't have linked to an Entity model (so old command query).

    [WebMethod(CacheDuration = 0)]
    public RadComboBoxItemData[] LoadMedportalUsers(RadComboBoxContext context) {
        IDictionary<string, object> contextDictionary = (IDictionary<string, object>)context;
        string filterString = ((string)contextDictionary["FilterString"]).ToLower();

        SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["myDB"].ConnectionString);


        SqlCommand selectCommand = new SqlCommand(@" SELECT UserID, UserName FROM Aspnet_Users
                                                     WHERE LOWER(UserName) LIKE '%" + filterString + "%'", connection);

        SqlDataAdapter adapter = new SqlDataAdapter(selectCommand);
        DataTable users = new DataTable();
        adapter.Fill(users);

        List<RadComboBoxItemData> result = new List<RadComboBoxItemData>(users.Rows.Count);

        foreach (DataRow row in users.Rows) {
            RadComboBoxItemData itemData = new RadComboBoxItemData();
            itemData.Text = row["UserName"].ToString();
            itemData.Value = row["UserID"].ToString();
            result.Add(itemData);
        }
        return result.ToArray();
    }

We have about 3000 users in the AspNet_Users table...so this throws:
Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.

Is there perhaps a way to tweak to allow the dynamic loading?

Any way around that?

[Simon]

Hello Steve,

You can increase the maxJsonLength property value in your web.config as described here.

Kind regards,
Simon
the Telerik team