how to create custom column from existing column in wpf and uwp datagrid

Author: shobika.palani

UWP/App.xaml

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+<Application
+    x:Class="SfDataGridDemo.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:SfDataGridDemo"
+    RequestedTheme="Light">
+
+</Application>

UWP/App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.ApplicationModel;
+using Windows.ApplicationModel.Activation;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace SfDataGridDemo
+{
+    /// <summary>
+    /// Provides application-specific behavior to supplement the default Application class.
+    /// </summary>
+    sealed partial class App : Application
+    {
+        /// <summary>
+        /// Initializes the singleton application object.  This is the first line of authored code
+        /// executed, and as such is the logical equivalent of main() or WinMain().
+        /// </summary>
+        public App()
+        {
+            this.InitializeComponent();
+            this.Suspending += OnSuspending;
+        }
+
+        /// <summary>
+        /// Invoked when the application is launched normally by the end user.  Other entry points
+        /// will be used such as when the application is launched to open a specific file.
+        /// </summary>
+        /// <param name="e">Details about the launch request and process.</param>
+        protected override void OnLaunched(LaunchActivatedEventArgs e)
+        {
+#if DEBUG
+            if (System.Diagnostics.Debugger.IsAttached)
+            {
+                this.DebugSettings.EnableFrameRateCounter = true;
+            }
+#endif
+            Frame rootFrame = Window.Current.Content as Frame;
+
+            // Do not repeat app initialization when the Window already has content,
+            // just ensure that the window is active
+            if (rootFrame == null)
+            {
+                // Create a Frame to act as the navigation context and navigate to the first page
+                rootFrame = new Frame();
+
+                rootFrame.NavigationFailed += OnNavigationFailed;
+
+                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
+                {
+                    //TODO: Load state from previously suspended application
+                }
+
+                // Place the frame in the current Window
+                Window.Current.Content = rootFrame;
+            }
+
+            if (e.PrelaunchActivated == false)
+            {
+                if (rootFrame.Content == null)
+                {
+                    // When the navigation stack isn't restored navigate to the first page,
+                    // configuring the new page by passing required information as a navigation
+                    // parameter
+                    rootFrame.Navigate(typeof(MainPage), e.Arguments);
+                }
+                // Ensure the current window is active
+                Window.Current.Activate();
+            }
+        }
+
+        /// <summary>
+        /// Invoked when Navigation to a certain page fails
+        /// </summary>
+        /// <param name="sender">The Frame which failed navigation</param>
+        /// <param name="e">Details about the navigation failure</param>
+        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
+        {
+            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
+        }
+
+        /// <summary>
+        /// Invoked when application execution is being suspended.  Application state is saved
+        /// without knowing whether the application will be terminated or resumed with the contents
+        /// of memory still intact.
+        /// </summary>
+        /// <param name="sender">The source of the suspend request.</param>
+        /// <param name="e">Details about the suspend request.</param>
+        private void OnSuspending(object sender, SuspendingEventArgs e)
+        {
+            var deferral = e.SuspendingOperation.GetDeferral();
+            //TODO: Save application state and stop any background activity
+            deferral.Complete();
+        }
+    }
+}

UWP/Assets/LockScreenLogo.scale-200.png

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+using Syncfusion.UI.Xaml.Grid;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Windows.UI.Xaml.Data;
+
+namespace SfDataGridDemo
+{
+    public class DateTimeOffsetFormatConverter : IValueConverter
+    {
+
+        private GridDateTimeOffsetColumn cachedColumn;
+
+        public DateTimeOffsetFormatConverter(GridDateTimeOffsetColumn column)
+        {
+            cachedColumn = column;
+        }
+
+        object IValueConverter.Convert(object value, Type targetType, object parameter, string language)
+        {
+            value = ((DateTimeOffset)value).DateTime;
+            var column = cachedColumn as GridDateTimeOffsetColumn;
+
+            if (value == null || DBNull.Value == value)
+            {
+                if (column.AllowNullValue && column.MaxDate != System.DateTime.MaxValue && column.WaterMark.ToString() == string.Empty)
+                    return column.MaxDate;
+
+                if (column.AllowNullValue && column.WaterMark.ToString() != string.Empty)
+                    return column.WaterMark;
+
+                if (column.MaxDate != System.DateTime.MaxValue)
+                    return column.MaxDate;
+            }
+            DateTime _columnValue;
+
+            _columnValue = (DateTime)value;
+
+            if (_columnValue < column.MinDate)
+                _columnValue = column.MinDate;
+
+            if (_columnValue > column.MaxDate)
+                _columnValue = column.MaxDate;
+
+            return _columnValue.ToString(column.FormatString, CultureInfo.CurrentUICulture);
+        }
+
+        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, string language)
+        {
+            throw new NotImplementedException();
+        }
+    }
+
+    public class DateTimeOffsetToDateTimeConverter : IValueConverter
+    {
+        object IValueConverter.Convert(object value, Type targetType, object parameter, string language)
+        {
+            if (value == null)
+                return null;
+            return ((DateTimeOffset)value).DateTime;
+        }
+
+        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, string language)
+        {
+
+            if (value == null)
+                return null;
+            return value is DateTimeOffset ? value : new DateTimeOffset((DateTime)value);
+
+        }
+    }
+    public class GridDateTimeOffsetColumn : GridDateTimeColumn
+    {
+        protected override void SetDisplayBindingConverter()
+        {
+
+            if ((DisplayBinding as Binding).Converter == null)
+                (DisplayBinding as Binding).Converter = new DateTimeOffsetFormatConverter(this);
+
+            if ((ValueBinding as Binding).Converter == null)
+                (ValueBinding as Binding).Converter = new DateTimeOffsetToDateTimeConverter();
+        }
+    }
+}