DynamicDataManager.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / DynamicDataManager.cs / 1305376 / DynamicDataManager.cs
                        
                        
                            namespace System.Web.DynamicData { 
    using System;
    using System.Collections;
    using System.Collections.Generic;
    using System.ComponentModel; 
    using System.ComponentModel.DataAnnotations;
    using System.Diagnostics; 
    using System.Diagnostics.CodeAnalysis; 
    using System.Drawing;
    using System.Globalization; 
    using System.Security.Permissions;
    using System.Web.Resources;
    using System.Web.UI;
    using System.Web.UI.WebControls; 
    using System.Web.DynamicData.Util;
    using System.Data.Objects; 
#if !ORYX_VNEXT 
    using IDataBoundControlInterface = System.Web.UI.WebControls.IDataBoundControl;
#else 
    using IDataBoundControlInterface = System.Web.DynamicData.Util.IDataBoundControl;
    using LinqDataSource = Microsoft.Web.Data.UI.WebControls.LinqDataSource;
    using LinqDataSourceContextEventArgs = Microsoft.Web.Data.UI.WebControls.LinqDataSourceContextEventArgs;
#endif 

    ///  
    /// Adds behavior to certain control to make them work with Dynamic Data 
    /// 
    [NonVisualControl()] 
    [ParseChildren(true)]
    [PersistChildren(false)]
    [ToolboxBitmap(typeof(DynamicDataManager), "DynamicDataManager.bmp")]
#if !ORYX_VNEXT 
    [Designer("System.Web.DynamicData.Design.DynamicDataManagerDesigner, " + AssemblyRef.SystemWebDynamicDataDesign)]
#endif 
    public class DynamicDataManager : Control { 
        private DataControlReferenceCollection _dataControls;
        // Key is used as the set of registered data source controls.  Value is ignored. 
        private Dictionary _dataSources = new Dictionary();

        /// 
        /// Causes foreign entities to be loaded as well setting the proper DataLoadOptions. 
        /// Only works with Linq To Sql.
        ///  
        [ 
        Category("Behavior"),
        DefaultValue(false), 
        ResourceDescription("DynamicDataManager_AutoLoadForeignKeys")
        ]
        public bool AutoLoadForeignKeys {
            get; 
            set;
        } 
 
#if !ORYX_VNEXT
        [ 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        EditorBrowsable(EditorBrowsableState.Never)
        ] 
        public override string ClientID {
            get { 
                return base.ClientID; 
            }
        } 

        [
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        EditorBrowsable(EditorBrowsableState.Never)
        ] 
        public override ClientIDMode ClientIDMode { 
            get {
                return base.ClientIDMode; 
            }
            set {
                throw new NotImplementedException();
            } 
        }
#endif 
        [ 
        Category("Behavior"),
        DefaultValue(null), 
        PersistenceMode(PersistenceMode.InnerProperty),
        MergableProperty(false),
        ]
        public DataControlReferenceCollection DataControls { 
            get {
                if (_dataControls == null) { 
                    _dataControls = new DataControlReferenceCollection(this); 
                }
                return _dataControls; 
            }
        }

        ///  
        /// See base class documentation
        ///  
        [ 
        Browsable(false),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), 
        EditorBrowsable(EditorBrowsableState.Never)
        ]
        public override bool Visible {
            get { 
                return base.Visible;
            } 
            set { 
                throw new NotImplementedException();
            } 
        }

        /// 
        /// See base class documentation 
        /// 
        [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers")] 
        protected override void OnInit(EventArgs e) { 
            base.OnInit(e);
 
            // Initialize the collection
            DataControls.Initialize();

            // Subscribe to the Page's Init to register the controls set in the DataControls collection 
            Page.Init += OnPageInit;
        } 
 

        private void OnPageInit(object sender, EventArgs e) { 
            foreach (DataControlReference controlReference in DataControls) {
                Control targetControl = Misc.FindControl(this, controlReference.ControlID);
                if (targetControl == null) {
                    throw new InvalidOperationException( 
                        String.Format(CultureInfo.CurrentCulture,
                        DynamicDataResources.DynamicDataManager_ControlNotFound, 
                        controlReference.ControlID)); 
                }
 
                RegisterControl(targetControl);
            }
        }
 
        /// 
        /// See base class documentation 
        ///  
        [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers")]
        protected override void OnLoad(EventArgs e) { 
            base.OnLoad(e);

            // Go through all the registered data sources
            foreach (IDynamicDataSource dataSource in _dataSources.Keys) { 

                // Expand any dynamic where parameters that they may use 
                dataSource.ExpandDynamicWhereParameters(); 
            }
        } 

        /// 
        /// Register a data control to give it Dynamic Data behavior
        ///  
        /// 
        public void RegisterControl(Control control) { 
            RegisterControl(control, false); 
        }
 
        /// 
        /// Register a data control to give it Dynamic Data behavior
        /// 
        /// When true, if a primary key is found in the route values 
        ///     (typically on the query string), it will get be set as the selected item. This only applies
        ///     to list controls. 
        public void RegisterControl(Control control, bool setSelectionFromUrl) { 
            //
            if (DesignMode) { 
                return;
            }

            IDataBoundControlInterface dataBoundControl = DataControlHelper.GetDataBoundControl(control, true /*failIfNotFound*/); 

            // If we can't get an associated IDynamicDataSource, don't do anything 
            IDynamicDataSource dataSource = dataBoundControl.DataSourceObject as IDynamicDataSource; 
            if (dataSource == null) {
                return; 
            }
            // If we can't get a MetaTable from the data source, don't do anything
            MetaTable table = MetaTableHelper.GetTableWithFullFallback(dataSource, Context.ToWrapper());
 
            // Save the datasource so we can process its parameters in OnLoad. The value we set is irrelevant
            _dataSources[dataSource] = null; 
 
            ((INamingContainer)control).SetMetaTable(table);
 
            BaseDataBoundControl baseDataBoundControl = control as BaseDataBoundControl;
            if (baseDataBoundControl != null) {
                EnablePersistedSelection(baseDataBoundControl, table);
            } 

            RegisterControlInternal(dataBoundControl, dataSource, table, setSelectionFromUrl, Page.IsPostBack); 
        } 

        internal static void EnablePersistedSelection(BaseDataBoundControl baseDataBoundControl, IMetaTable table) { 
            Debug.Assert(baseDataBoundControl != null, "NULL!");
            // Make the persisted selection [....] up with the selected index if possible
            if (!table.IsReadOnly) {
                DynamicDataExtensions.EnablePersistedSelectionInternal(baseDataBoundControl); 
            }
        } 
 
        internal void RegisterControlInternal(IDataBoundControlInterface dataBoundControl, IDynamicDataSource dataSource, IMetaTable table, bool setSelectionFromUrl, bool isPostBack) {
            // Set the auto field generator (for controls that support it - GridView and DetailsView) 
#if ORYX_VNEXT
            dataBoundControl.FieldsGenerator = new DefaultAutoFieldGenerator(table);
#else
            IFieldControl fieldControl = dataBoundControl as IFieldControl; 
            if (fieldControl != null) {
                fieldControl.FieldsGenerator = new DefaultAutoFieldGenerator(table); 
            } 
#endif
            var linqDataSource = dataSource as LinqDataSource; 
            var entityDataSource = dataSource as EntityDataSource;
            // If the context type is not set, we need to set it
            if (dataSource.ContextType == null) {
                dataSource.ContextType = table.DataContextType; 

                // If it's a LinqDataSurce, register for ContextCreating so the context gets created using the correct ctor 
                // Ideally, this would work with other datasource, but we just don't have the right abstraction 
                if (linqDataSource != null) {
                    linqDataSource.ContextCreating += delegate(object sender, LinqDataSourceContextEventArgs e) { 
                        e.ObjectInstance = table.CreateContext();
                    };
                }
 
                if (entityDataSource != null) {
                    entityDataSource.ContextCreating += delegate(object sender, EntityDataSourceContextCreatingEventArgs e) { 
                        e.Context = (ObjectContext)table.CreateContext(); 
                    };
                } 
            }

            // If the datasource doesn't have an EntitySetName (aka TableName), set it from the meta table
            if (String.IsNullOrEmpty(dataSource.EntitySetName)) { 
                dataSource.EntitySetName = table.DataContextPropertyName;
            } 
 
            // If there is no Where clause, turn on auto generate
            if (String.IsNullOrEmpty(dataSource.Where)) { 
                dataSource.AutoGenerateWhereClause = true;
            }

            // If it's a LinqDataSource and the flag is set, pre load the foreign keys 
            if (AutoLoadForeignKeys && linqDataSource != null) {
                linqDataSource.LoadWithForeignKeys(table.EntityType); 
            } 

            if (!isPostBack) { 
                if (table.HasPrimaryKey) {
                    dataBoundControl.DataKeyNames = table.PrimaryKeyNames;

                    // Set the virtual selection from the URL if needed 
                    var dataKeySelector = dataBoundControl as IPersistedSelector;
                    if (dataKeySelector != null && setSelectionFromUrl) { 
                        DataKey dataKey = table.GetDataKeyFromRoute(); 
                        if (dataKey != null) {
                            dataKeySelector.DataKey = dataKey; 
                        }
                    }
#if ORYX_VNEXT
                    dataBoundControl.EnableModelValidation = true; 
#endif
                } 
                else { 
#if ORYX_VNEXT
                    dataBoundControl.EnableModelValidation = false; 
#endif
                }
            }
        } 

 
        internal static IControlParameterTarget GetControlParameterTarget(Control control) { 
#if ORYX_VNEXT
            if (control is IControlParameterTarget) 
                return (IControlParameterTarget)control;

            return (IControlParameterTarget)DataControlHelper.GetControlAdapter(control);
#else 
            return (control as IControlParameterTarget) ?? new DataBoundControlParameterTarget(control);
#endif 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
DynamicDataManager.cs source code in C# .NET

Source code for the .NET framework in C#

Code:

Link Menu
