NTEXT with more than 4000 characters in SQL Server CE in Windows Phone

Question

NTEXT with more than 4000 characters in SQL Server CE in windows phone

I have a database in my windows phone app with a ntext field in one of the tables

Answer 1

ntext supports over 500 million characters, so the problem you have has nothing to do with it. See http://msdn.microsoft.com/en-us/library/ms172424.aspx

You might want to look at the following: http://msdn.microsoft.com/en-us/library/hh202872(v=vs.92).aspx

The list doesn't mention ntext, but it does mention text. I'm going to guess that you might need to provide your own custom formatter.

update

Look at the following hotfix. It covers certain situations when using linq, ce and the ntext data type. Looks like without the fix, the formatter is forcing ntext to be a nvarchar(4000) under the hood. http://support.microsoft.com/kb/958478

Answer 2

I think your column in the actual database file is not ntext, for whatever reason.

This works fine for me:

    using (NorthwindContext ctx = new NorthwindContext(NorthwindContext.ConnectionString))
    {
        ctx.DeleteDatabase();
        ctx.CreateDatabase();
        var category = new Categories();
        category.CategoryName = "Test";
        category.Description = new string('x', 6666);
        ctx.Categories.InsertOnSubmit(category);
        ctx.SubmitChanges();

        var testCat = ctx.Categories.First();
        if (testCat.Description.Length == 6666)
        {
            MessageBox.Show("Works on my Windows Phone");                
        }
    }

Column declaration:

[global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_Description", DbType="NText", UpdateCheck=UpdateCheck.Never)]
        public string Description
        {
            get
            {
                return this._Description;
            }
            set
            {
                if ((this._Description != value))
                {
                    this.OnDescriptionChanging(value);
                    this.SendPropertyChanging();
                    this._Description = value;
                    this.SendPropertyChanged("Description");
                    this.OnDescriptionChanged();
                }
            }
        }