Question

I have the following:

    var db = new datesDataContext();
    var query =
    from ord in db.Dates
    where ord.id == id
    select ord;

    foreach (Date ord in query)
    {
        ord.date1 = product.date1;
        ord.name = product.name;
    }
    db.SubmitChanges();

It all runs fine (no errors, etc) except that SubmitChanges is not making the changes in the database.

ord.dat1 and ord.name are definitely being set…

edit: here’s my date class (it says partial but it’s the entire class, no other definition elsewhere):

[global::System.Data.Linq.Mapping.TableAttribute(Name="dbo.Dates")]
public partial class Date
{

    private System.Nullable<int> _id;

    private System.Nullable<System.DateTime> _date1 = DateTime.Now;

    private string _name;

    public Date()
    {
    }

    [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_id", DbType="Int")]
    public System.Nullable<int> id
    {
        get
        {
            return this._id;
        }
        set
        {
            if ((this._id != value))
            {
                this._id = value;
            }
        }
    }

    [global::System.Data.Linq.Mapping.ColumnAttribute(Name="date", Storage="_date1", DbType="DateTime")]
    public System.Nullable<System.DateTime> date1
    {
        get
        {
            return this._date1;
        }
        set
        {
            if ((this._date1 != value))
            {
                this._date1 = value;
            }
        }
    }

    [global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_name", DbType="Text", UpdateCheck=UpdateCheck.Never)]
    public string name
    {
        get
        {
            return this._name;
        }
        set
        {
            if ((this._name != value))
            {
                this._name = value;
            }
        }
    }
}

Answer 1

Is your Date class implementing INotifyPropertyChanged?

EDIT: implement INotifyPropertyChanged in your Date class

public partial class Date : INotifyPropertyChanged
{
         public event PropertyChangedEventHandler PropertyChanged;

         private void NotifyPropertyChanged(String info)
         {
             if (PropertyChanged != null)
             {
                 PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }

…..rest of class definition

and in each setter method use this code after changing values

NotifyPropertyChanged("PropertyName");

PropertyName in your case is id, date1 and name.

You also need to specify Primary Key otherwise tracking changes will not work.