private void UpdateValueOfflineSystemWCF(Category category)
{
using (var ctx = new Entities.NorthwindEntities())
{
ctx.Categories.Attach(category);
var entry = ctx.ObjectStateManager.GetObjectStateEntry(category);
entry.SetModifiedProperty("Description");
entry.SetModifiedProperty("SomePropertyToSet");
ctx.SaveChanges();
}
}
private void UpdateObjectWithApplyCurrentValues(Entities.NorthwindEntities ctx, Category cat)
{
var category = ctx.Categories.OfType <Category>().First(c => c.CategoryID == cat.CategoryID);
ctx.Categories.ApplyCurrentValues(category);
var entry = ctx.ObjectStateManager.GetObjectStateEntry(category);
var originalValues = entry.GetUpdatableOriginalValues();
var modifiedProperties = entry.GetModifiedProperties();
originalValues.SetValue(originalValues.GetOrdinal("Description"), cat.Description);
ctx.SaveChanges();
}
public void TestSaveChanges()
{
using (var ctx = new Entities.NorthwindEntities())
{
ctx.SavingChanges += new EventHandler(ctx_SavingChanges);
var region = ctx.Regions.CreateObject();
region.RegionDescription = "Sample Region";
ctx.Regions.AddObject(region);
ctx.SaveChanges();
var regionAdded = ctx.Regions.FirstOrDefault(r => r.RegionID.Equals(region.RegionID));
ctx.Regions.DeleteObject(region);
var regionState = ctx.ObjectStateManager.GetObjectStateEntry(region).State; // get the state of the entity
var upState = ctx.ObjectStateManager.GetObjectStateEntry(region);
//upState.ApplyCurrentValues(region);
var originalValues = upState.GetUpdatableOriginalValues();
//ctx.ContextOptions.
ctx.SaveChanges();
var context = new Entities.NorthwindEntities();
//regionAdded.RegionDescription = "Updated Region";
ctx.Regions.ApplyCurrentValues(regionAdded);
var entry = ctx.ObjectStateManager.GetObjectStateEntry(regionAdded);
var origValues = entry.GetUpdatableOriginalValues();
//entry.CurrentValues[]
//var entry = ctx.ObjectStateManager.GetObjectStateEntry(regionAdded);
//var origValues = entry.GetUpdatableOriginalValues();
//var properties = entry.GetModifiedProperties();
//ctx.DetectChanges();
ctx.SaveChanges();
}
}
