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POHow to create calculated Fields in Partial Classes - WPF
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  1. POHow to create calculated Fields in Partial Classes - WPF
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    copied!<p>I am trying to use the calculated columns to display in my grid.</p> <p>I have a partial class automatically generated by EF code generator with three properties: and i am trying to creating another partial class and add calculated field there for e.g. </p> <pre><code>Public partial class Employee { public decimal? totalSalary { get { return salary*wagerate+bonus; } } } </code></pre> <p>It works fine for the first time but does not work when the salary/bonus/hours are changed. I am using these fields inside a grid </p> <p>Here is my code generated by EF entity generator</p> <pre><code>//------------------------------------------------------------------------------ // &lt;auto-generated&gt; // This code was generated from a template. // // Changes to this file may cause incorrect behavior and will be lost if // the code is regenerated. // &lt;/auto-generated&gt; //------------------------------------------------------------------------------ using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Collections.Specialized; using System.ComponentModel; using System.Globalization; using System.Runtime.Serialization; using System.ComponentModel.DataAnnotations; namespace Employees.Contract { [DataContract(IsReference = true)] [KnownType(typeof(Department))] [KnownType(typeof(PropertyType))] public partial class Employee: IObjectWithChangeTracker, INotifyPropertyChanged,IDataErrorInfo { [NonSerialized] private CLOS.Contract.Validation.DataErrorInfoSupport dataErrorInfoSupport; public Employee() { dataErrorInfoSupport = new CLOS.Contract.Validation.DataErrorInfoSupport(this); Init(); } partial void Init(); string IDataErrorInfo.Error { get { return dataErrorInfoSupport.Error; } } string IDataErrorInfo.this[string memberName] { get { return dataErrorInfoSupport[memberName]; } } #region Primitive Properties [DataMember] public Nullable&lt;decimal&gt; Salary { get { return _salary; } set { if (_salary != value) { _salary = value; OnPropertyChanged("Salary"); } } } private Nullable&lt;decimal&gt; _salary; [DataMember] public Nullable&lt;decimal&gt; WageRate { get { return _wageRate; } set { if (_wageRate != value) { _wageRate = value; OnPropertyChanged("WageRate"); } } } private Nullable&lt;decimal&gt; _wageRate; [DataMember] public Nullable&lt;decimal&gt; Bonus { get { return _bonus; } set { if (_bonus != value) { _bonus = value; OnPropertyChanged("Bonus"); } } } private Nullable&lt;decimal&gt; _bonus; #endregion #region Navigation Properties [DataMember] public Department Department { get { return _department; } set { if (!ReferenceEquals(_department, value)) { var previousValue = _department; _department = value; OnNavigationPropertyChanged("Department"); } } } private Borrower _department; [DataMember] public PropertyType PropertyType { get { return _propertyType; } set { if (!ReferenceEquals(_propertyType, value)) { var previousValue = _propertyType; _propertyType = value; OnNavigationPropertyChanged("PropertyType"); } } } private PropertyType _propertyType; #endregion #region ChangeTracking protected virtual void OnPropertyChanged(String propertyName) { if (ChangeTracker.State != ObjectState.Added &amp;&amp; ChangeTracker.State != ObjectState.Deleted) { ChangeTracker.State = ObjectState.Modified; } if (_propertyChanged != null) { _propertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } protected virtual void OnNavigationPropertyChanged(String propertyName) { if (_propertyChanged != null) { _propertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged{ add { _propertyChanged += value; } remove { _propertyChanged -= value; } } private event PropertyChangedEventHandler _propertyChanged; private ObjectChangeTracker _changeTracker; [DataMember] public ObjectChangeTracker ChangeTracker { get { if (_changeTracker == null) { _changeTracker = new ObjectChangeTracker(); _changeTracker.ObjectStateChanging += HandleObjectStateChanging; } return _changeTracker; } set { if(_changeTracker != null) { _changeTracker.ObjectStateChanging -= HandleObjectStateChanging; } _changeTracker = value; if(_changeTracker != null) { _changeTracker.ObjectStateChanging += HandleObjectStateChanging; } } } private void HandleObjectStateChanging(object sender, ObjectStateChangingEventArgs e) { if (e.NewState == ObjectState.Deleted) { ClearNavigationProperties(); } } protected bool IsDeserializing { get; private set; } [OnDeserializing] public void OnDeserializingMethod(StreamingContext context) { IsDeserializing = true; } [OnDeserialized] public void OnDeserializedMethod(StreamingContext context) { dataErrorInfoSupport = new CLOS.Contract.Validation.DataErrorInfoSupport(this); IsDeserializing = false; ChangeTracker.ChangeTrackingEnabled = true; } protected virtual void ClearNavigationProperties() { Department = null; PropertyType = null; } #endregion } </code></pre> <p>}</p> <p>It also works if i put <code>OnPropertyChanged("Salary")</code> in Hours,Wage,Overtime Property in EF Generated class (which is not a good idea) because if the class gets regenerated , my code will be wiped out</p> <p>Any help is appreciated. (Sorry for the formatting , this is my first question)</p> <p>Thanks</p>
 

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