How to use PropertyChangingEventArgs class of System.ComponentModel package

Best JustMockLite code snippet using System.ComponentModel.PropertyChangingEventArgs

MultiSliderPoint.cs

Source:MultiSliderPoint.cs

...20            set21            {22                var changing = value == this.Left;23                if (changing)24                    OnPropertyChanging(new System.ComponentModel.PropertyChangingEventArgs("Left"));25                Polygon.SetValue(Canvas.LeftProperty, value);26                if (changing)27                    OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("Left"));28            }29        }30        internal double Center31        {32            get { return this.Left + Width / 2; }33            set34            {35                var changing = value == this.Center;36                if (changing)37                    OnPropertyChanging(new System.ComponentModel.PropertyChangingEventArgs("Center"));38                this.Left = value - Width / 2;39                if (changing)40                    OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("Center"));41            }42        }43        internal double Width44        {45            get46            {47                return (double)Polygon.GetValue(Polygon.WidthProperty);48            }49            set50            {51                var changing = value == Polygon.Width;52                if (changing)53                    OnPropertyChanging(new System.ComponentModel.PropertyChangingEventArgs("Width"));54                Polygon.SetValue(Polygon.WidthProperty, value);55                if (changing)56                    OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("Width"));57            }58        }59        internal double Height60        {61            get62            {63                return (double)Polygon.GetValue(Polygon.HeightProperty);64            }65            set66            {67                var changing = value == this.Width;68                if (changing)69                    OnPropertyChanging(new System.ComponentModel.PropertyChangingEventArgs("Height"));70                Polygon.SetValue(Polygon.HeightProperty, value);71                if (changing)72                    OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("Height"));73            }74        }75        internal Panel Parent { get; set; }76        internal bool IsMouseCaptured { get { return (bool)Polygon.GetValue(Polygon.IsMouseCapturedProperty); } }77        internal bool IsMouseOver { get { return (bool)Polygon.GetValue(Polygon.IsMouseOverProperty); } }78        internal Style Style79        {80            get81            {82                return (Style)Polygon.GetValue(Polygon.StyleProperty);83            }84            set85            {86                var changing = value == this.Style;87                if (changing)88                    OnPropertyChanging(new System.ComponentModel.PropertyChangingEventArgs("Style"));89                Polygon.SetValue(Polygon.StyleProperty, value);90                if (changing)91                    OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("Style"));92            }93        }94        public MultiSliderPoint(double center, Panel parent)95        {96            this.Parent = parent;97            this.Polygon = new Polygon { Width = defaultWidth, Height = defaultHeight };98            if (parent != null)99                this.Center = center;100            Polygon.Points.Add(new Point(0, 10));101            Polygon.Points.Add(new Point(5, 0));102            Polygon.Points.Add(new Point(10, 10));103            Polygon.Points.Add(new Point(0, 10));104            Polygon.MouseMove += Polygon_MouseMove;105            Polygon.MouseUp += Polygon_MouseUp;106            Polygon.MouseDown += Polygon_Down;107            Polygon.Focusable = true;108        }109        ~MultiSliderPoint()110        {111            try { this.Parent.Children.Remove(Polygon); }112            catch { }113        }114        private void Polygon_MouseMove(object sender, MouseEventArgs e)115        {116            if (e.LeftButton != MouseButtonState.Pressed) return;117            var poly = sender as Polygon;118            var point = Mouse.GetPosition(this.Parent);119            var center = point.X;120            if (center >= 0 && center <= this.Parent.Width)121                this.Center = center;122        }123        private void Polygon_MouseUp(object sender, MouseEventArgs e)124        {125            var poly = sender as Polygon;126            poly.ReleaseMouseCapture();127        }128        private void Polygon_Down(object sender, MouseEventArgs e)129        {130            var poly = sender as Polygon;131            poly.CaptureMouse();132            poly.Focus();133        }134        #region INotifyPropertyChanged Members135        public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;136        protected virtual void OnPropertyChanged(System.ComponentModel.PropertyChangedEventArgs e)137        {138            if (PropertyChanged != null)139                PropertyChanged(this, e);140        }141        #endregion142        #region INotifyPropertyChanging Members143        public event System.ComponentModel.PropertyChangingEventHandler PropertyChanging;144        protected virtual void OnPropertyChanging(System.ComponentModel.PropertyChangingEventArgs e)145        {146            if (PropertyChanging != null)147                PropertyChanging(this, e);148        }149        #endregion150    }151}...

ViewModelBase.cs

Source:ViewModelBase.cs

1ï»¿using System.Collections.Generic;2using System.ComponentModel;3using System.Runtime.CompilerServices;4using ReactiveUI;5using PropertyChangingEventArgs = System.ComponentModel.PropertyChangingEventArgs;6using PropertyChangingEventHandler = System.ComponentModel.PropertyChangingEventHandler;7namespace SmartButler.Logic.Common8{9    public abstract class ViewModelBase : ReactiveObject, INotifyPropertyChanged, System.ComponentModel.INotifyPropertyChanging10    {11        private bool _isBusy = false;12        public new event PropertyChangedEventHandler PropertyChanged;13        public new event PropertyChangingEventHandler PropertyChanging;14        public bool IsBusy15        {16            get => _isBusy;17            set18            {19                OnPropertyChanging();20                _isBusy = value;21                OnPropertyChanged();22            }23        }24        protected void SetValue<T>(ref T backingField, T value, [CallerMemberName] string callerName = null)25        {26            if (EqualityComparer<T>.Default.Equals(backingField, value))27                return;28            OnPropertyChanging(callerName);29            backingField = value;30            OnPropertyChanged(callerName);31        }32        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)33        {34            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));35        }36        protected virtual void OnPropertyChanging([CallerMemberName] string propertyName = null)37        {38            PropertyChanging?.Invoke(this, new PropertyChangingEventArgs(propertyName));39        }40        41    }42}

PropertyChangingEventArgs.cs

Source:PropertyChangingEventArgs.cs

1//------------------------------------------------------------------------------2// <copyright file="PropertyChangingEventArgs.cs" company="Microsoft">3//     Copyright (c) Microsoft Corporation.  All rights reserved.4// </copyright>                                                                5//------------------------------------------------------------------------------6namespace System.ComponentModel {7    8    using System;9    using System.Diagnostics;10    using System.Security.Permissions;11    /// <devdoc>12    /// <para>Provides data for the <see langword='PropertyChanging'/>13    /// event.</para>14    /// </devdoc>15#if !SILVERLIGHT16    [HostProtection(SharedState = true)]17#endif18    public class PropertyChangingEventArgs : EventArgs {19        private readonly string propertyName;20        /// <devdoc>21        /// <para>Initializes a new instance of the <see cref='System.ComponentModel.PropertyChangingEventArgs'/>22        /// class.</para>23        /// </devdoc>24        public PropertyChangingEventArgs(string propertyName) {25            this.propertyName = propertyName;26        }27        /// <devdoc>28        ///    <para>Indicates the name of the property that is changing.</para>29        /// </devdoc>30        public virtual string PropertyName {31            get {32                return propertyName;33            }34        }35    }36}...

PropertyChangingEventArgs

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.ComponentModel;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7{8    {9        static void Main(string[] args)10        {11            Person p = new Person();12            p.PropertyChanging += P_PropertyChanging;13            p.Name = "John";14            p.Age = 25;15            Console.WriteLine("Person Details");16            Console.WriteLine("Name: " + p.Name);17            Console.WriteLine("Age: " + p.Age);18            Console.Read();19        }20        private static void P_PropertyChanging(object sender, PropertyChangingEventArgs e)21        {22            Console.WriteLine("Property Changing: " + e.PropertyName);23        }24    }25    {26        public event PropertyChangingEventHandler PropertyChanging;27        private string name;28        private int age;29        {30            get { return name; }31            {32                if (PropertyChanging != null)33                {34                    PropertyChanging(this, new PropertyChangingEventArgs("Name"));35                }36                name = value;37            }38        }39        {40            get { return age; }41            {42                if (PropertyChanging != null)43                {44                    PropertyChanging(this, new PropertyChangingEventArgs("Age"));45                }46                age = value;47            }48        }49    }50}

PropertyChangingEventArgs

Using AI Code Generation

1using System.ComponentModel;2{3    {4        static void Main(string[] args)5        {6            Person p = new Person();7            p.PropertyChanging += new PropertyChangingEventHandler(p_PropertyChanging);8            p.Name = "Raj";9            p.Name = "Rajesh";10            p.Name = "Rajesh Kumar";11            p.Name = "Rajesh Kumar Singh";12        }13        static void p_PropertyChanging(object sender, PropertyChangingEventArgs e)14        {15            Console.WriteLine("Property {0} is changing", e.PropertyName);16        }17    }18    {19        private string name;20        public event PropertyChangingEventHandler PropertyChanging;21        {22            get { return name; }23            {24                if (PropertyChanging != null)25                {26                    PropertyChanging(this, new PropertyChangingEventArgs("Name"));27                }28                name = value;29            }30        }31    }32}

PropertyChangingEventArgs

Using AI Code Generation

1using System;2using System.ComponentModel;3{4    private string name;5    private int age;6    public event PropertyChangingEventHandler PropertyChanging;7    {8        get { return name; }9        {10            if (name != value)11            {12                PropertyChanging(this, new PropertyChangingEventArgs("Name"));13                name = value;14            }15        }16    }17    {18        get { return age; }19        {20            if (age != value)21            {22                PropertyChanging(this, new PropertyChangingEventArgs("Age"));23                age = value;24            }25        }26    }27}28{29    static void Main(string[] args)30    {31        Employee emp = new Employee();32        emp.PropertyChanging += new PropertyChangingEventHandler(emp_PropertyChanging);33        emp.Name = "Mark";34        emp.Age = 25;35    }36    static void emp_PropertyChanging(object sender, PropertyChangingEventArgs e)37    {38        Console.WriteLine("Property {0} is changing", e.PropertyName);39    }40}41using System;42using System.ComponentModel;43{44    private string name;45    private int age;46    public event PropertyChangingEventHandler PropertyChanging;47    {48        get { return name; }49        {50            if (name != value)51            {52                PropertyChanging(this, new PropertyChangingEventArgs("Name"));53                name = value;54            }55        }56    }57    {58        get { return age; }59        {60            if (age != value)61            {62                PropertyChanging(this, new PropertyChangingEventArgs("Age"));63                age = value;64            }65        }66    }67}68{69    static void Main(string[] args)70    {71        Employee emp = new Employee();72        emp.PropertyChanging += new PropertyChangingEventHandler(emp_PropertyChanging);73        emp.Name = "Mark";74        emp.Age = 25;75    }76    static void emp_PropertyChanging(object sender, PropertyChangingEventArgs e)77    {78        Console.WriteLine("Property {0} is changing", e.PropertyName);79    }80}

PropertyChangingEventArgs

Using AI Code Generation

1using System.ComponentModel;2using System;3{4    {5        static void Main(string[] args)6        {7            Console.WriteLine("Hello World!");8        }9    }10    {11        private string name;12        private string address;13        {14            {15                return name;16            }17            {18                if (value != name)19                {20                    OnPropertyChanging("Name");21                    name = value;22                    OnPropertyChanged("Name");23                }24            }25        }26        {27            {28                return address;29            }30            {31                if (value != address)32                {33                    OnPropertyChanging("Address");34                    address = value;35                    OnPropertyChanged("Address");36                }37            }38        }39        protected virtual void OnPropertyChanging(string propertyName)40        {41            if (PropertyChanging != null)42            {43                PropertyChanging(this, new PropertyChangingEventArgs(propertyName));44            }45        }46        protected virtual void OnPropertyChanged(string propertyName)47        {48            if (PropertyChanged != null)49            {50                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));51            }52        }53        public event PropertyChangingEventHandler PropertyChanging;

PropertyChangingEventArgs

Using AI Code Generation

1using System;2using System.ComponentModel;3{4    string myString;5    {6        {7            return myString;8        }9        {10            if (value != myString)11            {12                PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("MyString");13                OnPropertyChanging(pcea);14                if (!pcea.Cancel)15                {16                    myString = value;17                    OnPropertyChanged("MyString");18                }19            }20        }21    }22    public event PropertyChangingEventHandler PropertyChanging;23    public event PropertyChangedEventHandler PropertyChanged;24    protected void OnPropertyChanged(PropertyChangedEventArgs e)25    {26        if (PropertyChanged != null)27        {28            PropertyChanged(this, e);29        }30    }31    protected void OnPropertyChanging(PropertyChangingEventArgs e)32    {33        if (PropertyChanging != null)34        {35            PropertyChanging(this, e);36        }37    }38    public static void Main()39    {40        MyClass mc = new MyClass();41        mc.PropertyChanged += new PropertyChangedEventHandler(mc_PropertyChanged);42        mc.PropertyChanging += new PropertyChangingEventHandler(mc_PropertyChanging);43        mc.MyString = "hello";44        mc.MyString = "hello";45    }46    static void mc_PropertyChanging(object sender, PropertyChangingEventArgs e)47    {48        Console.WriteLine("PropertyChanging: {0}", e.PropertyName);49    }50    static void mc_PropertyChanged(object sender, PropertyChangedEventArgs e)51    {52        Console.WriteLine("PropertyChanged: {0}", e.PropertyName);53    }54}

PropertyChangingEventArgs

Using AI Code Generation

1using System.ComponentModel;2{3   public static void Main()4   {5      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");6      System.Console.WriteLine(pcea.PropertyName);7   }8}9using System.ComponentModel;10{11   public static void Main()12   {13      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");14      System.Console.WriteLine(pcea.PropertyName);15   }16}17using System.ComponentModel;18{19   public static void Main()20   {21      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");22      System.Console.WriteLine(pcea.PropertyName);23   }24}25using System.ComponentModel;26{27   public static void Main()28   {29      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");30      System.Console.WriteLine(pcea.PropertyName);31   }32}33using System.ComponentModel;34{35   public static void Main()36   {37      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");38      System.Console.WriteLine(pcea.PropertyName);39   }40}41using System.ComponentModel;42{43   public static void Main()44   {45      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");46      System.Console.WriteLine(pcea.PropertyName);47   }48}49using System.ComponentModel;50{51   public static void Main()52   {53      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");54      System.Console.WriteLine(pcea.PropertyName);55   }56}57using System.ComponentModel;58{59   public static void Main()60   {61      PropertyChangingEventArgs pcea = new PropertyChangingEventArgs("Name");62      System.Console.WriteLine(pcea.PropertyName);63   }64}

PropertyChangingEventArgs

Using AI Code Generation

1using System.ComponentModel;2using System;3{4    public static void Main()5    {6        Person p = new Person();7        p.PropertyChanging += p_PropertyChanging;8        p.Name = "John";9        p.Age = 30;10        Console.ReadLine();11    }12    static void p_PropertyChanging(object sender, PropertyChangingEventArgs e)13    {14        Console.WriteLine("Property {0} is changing...", e.PropertyName);15    }16}17{18    public event PropertyChangingEventHandler PropertyChanging;19    string name;20    {21        get { return name; }22        {23            if (value != name)24            {25                PropertyChanging(this, new PropertyChangingEventArgs("Name"));26                name = value;27            }28        }29    }30    int age;31    {32        get { return age; }33        {34            if (value != age)35            {36                PropertyChanging(this, new PropertyChangingEventArgs("Age"));37                age = value;38            }39        }40    }41}42using System.ComponentModel;43using System;44{45    public static void Main()46    {47        Person p = new Person();48        p.PropertyChanged += p_PropertyChanged;49        p.Name = "John";50        p.Age = 30;51        Console.ReadLine();52    }53    static void p_PropertyChanged(object sender, PropertyChangedEventArgs e)54    {55        Console.WriteLine("Property {0} is changed...", e.PropertyName);56    }57}58{59    public event PropertyChangedEventHandler PropertyChanged;60    string name;61    {62        get { return name; }63        {64            if (value != name)65            {66                PropertyChanged(this, new PropertyChangedEventArgs("Name"));67                name = value;68            }69        }70    }71    int age;72    {73        get { return age; }74        {

PropertyChangingEventArgs

Using AI Code Generation

1using System.ComponentModel;2{3    static void Main(string[] args)4    {5        PropertyChangingEventArgs e = new PropertyChangingEventArgs("Name");6        Console.WriteLine(e.PropertyName);7    }8}

PropertyChangingEventArgs

Using AI Code Generation

1using System.ComponentModel;2using System;3{4    static void Main(string[] args)5    {6        Console.WriteLine("Hello World!");7    }8}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.