//修改2 按需修改
public bool UpdateEntity(Expression <Func <T, T> > propertyExpression, bool isSave = false)
{
try
{
var memberInitExpression = propertyExpression.Body as MemberInitExpression;
var entity = PropertyUtils.CreateEntity(propertyExpression);
DbEntityEntry <T> entry = db.Entry(entity);
entry.State = EntityState.Unchanged;
if (memberInitExpression != null)
{
foreach (var memberInfo in memberInitExpression.Bindings)
{
string propertyName = memberInfo.Member.Name;
entry.Property(propertyName).IsModified = true;
}
}
db.Configuration.ValidateOnSaveEnabled = false;
if (isSave)
{
return(db.SaveChanges() > 0);
}
return(false);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
db.Configuration.AutoDetectChangesEnabled = true;
}
}
//修改2 按需修改
public static void UpdateEntity <TEntity>(this DbContext db, Expression <Func <TEntity, TEntity> > propertyExpression) where TEntity : class, new()
{
try
{
var memberInitExpression = propertyExpression.Body as MemberInitExpression;
var entity = PropertyUtils.CreateEntity(propertyExpression);
DbEntityEntry <TEntity> entry = db.Entry(entity);
entry.State = EntityState.Unchanged;
if (memberInitExpression != null)
{
foreach (var memberInfo in memberInitExpression.Bindings)
{
string propertyName = memberInfo.Member.Name;
entry.Property(propertyName).IsModified = true;
}
}
db.Configuration.ValidateOnSaveEnabled = false;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
db.Configuration.AutoDetectChangesEnabled = true;
}
}
