Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/ModelDataSource.cs

@@ -0,0 +1,162 @@
+//------------------------------------------------------------------------------
+// <copyright file="ModelDataSource.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections;
+    using System.Web.UI;
+
+
+    /// <summary>
+    /// The data source used by DataBoundControls like GridView/FormView to support data methods
+    /// to perform the Delete, Insert, Select, and Update operations. 
+    /// </summary>
+    public class ModelDataSource : IDataSource, IStateManager {
+
+        internal const string DefaultViewName = "DefaultView";
+        private ModelDataSourceView _view;
+        private ICollection _viewNames;
+        private EventHandler DataSourceChanged;
+
+        public ModelDataSource(Control dataControl) {
+            if (dataControl == null) {
+                throw new ArgumentNullException("dataControl");
+            }
+            DataControl = dataControl;
+        }
+
+        /// <summary>
+        /// Updates the required properties for the one way data binding to work.
+        /// </summary>
+        public void UpdateProperties(string modelTypeName, string selectMethod) {
+            UpdateProperties(modelTypeName, selectMethod, String.Empty, String.Empty, String.Empty, String.Empty);
+        }
+
+        /// <summary>
+        /// Updates the required properties for the two way data binding to work.
+        /// </summary>
+        public void UpdateProperties(string modelTypeName, string selectMethod, string updateMethod, string insertMethod, string deleteMethod, string dataKeyName) {
+            View.UpdateProperties(modelTypeName, selectMethod, updateMethod, insertMethod, deleteMethod, dataKeyName);
+        }
+
+        /// <summary>
+        /// Control for which this is an internal data source to support the data methods for data operations.
+        /// </summary>
+        public Control DataControl {
+            get;
+            private set;
+        }
+
+        public event CallingDataMethodsEventHandler CallingDataMethods {
+            add {
+                View.CallingDataMethods += value;
+            }
+            remove {
+                View.CallingDataMethods -= value;
+            }
+        }
+
+        /// <summary>
+        /// The default (and only) ModelDataSourceView for this ModelDataSource.
+        /// Subclasses can override this method to return a different ModelDataSourceView.
+        /// </summary>
+        public virtual ModelDataSourceView View {
+            get {
+                if (_view == null) {
+                    _view = new ModelDataSourceView(this);
+                }
+
+                return _view;
+            }
+        }
+
+        protected virtual bool IsTrackingViewState() {
+            return ((IStateManager)View).IsTrackingViewState;
+        }
+
+        protected virtual void LoadViewState(object savedState) {
+            ((IStateManager)View).LoadViewState(savedState);
+        }
+
+        protected virtual object SaveViewState() {
+            return ((IStateManager)View).SaveViewState();
+        }
+
+        protected virtual void TrackViewState() {
+            ((IStateManager)View).TrackViewState();
+        }
+
+        /// <devdoc>
+        /// Gets the view associated with this data source.
+        /// </devdoc>
+        private DataSourceView GetView(string viewName) {
+            //Ignore the input viewName as there is only a single view.
+            return View;
+        }
+
+
+        /// <devdoc>
+        /// </devdoc>
+        private ICollection GetViewNames() {
+            if (_viewNames == null) {
+                _viewNames = new string[1] { DefaultViewName };
+            }
+            return _viewNames;
+        }
+        
+        #region Implementation of IDataSource
+        /// <summary>
+        ///   Raised when the underlying data source has changed. The
+        ///   change may be due to a change in the control's properties,
+        ///   or a change in the data due to an edit action performed by
+        ///   the DataSourceControl.
+        /// </summary>
+        event EventHandler IDataSource.DataSourceChanged {
+            add {
+                DataSourceChanged += value;
+            }
+            remove {
+                DataSourceChanged -= value;
+            }
+        }
+
+
+        /// <internalonly/>
+        DataSourceView IDataSource.GetView(string viewName) {
+            return GetView(viewName);
+        }
+
+
+        /// <internalonly/>
+        ICollection IDataSource.GetViewNames() {
+            return GetViewNames();
+        }
+        #endregion
+
+        #region Implementation of IStateManager
+
+        bool IStateManager.IsTrackingViewState {
+            get {
+                return IsTrackingViewState();
+            }
+        }
+
+        void IStateManager.LoadViewState(object savedState) {
+            LoadViewState(savedState);
+        }
+
+        object IStateManager.SaveViewState() {
+            return SaveViewState();
+        }
+
+        void IStateManager.TrackViewState() {
+            TrackViewState();
+        }
+        #endregion
+    }
+}
+