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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / ModelProviders / TableProvider.cs / 1305376 / TableProvider.cs
using System.Collections.ObjectModel; using System.ComponentModel; using System.Linq; using System.Security.Principal; namespace System.Web.DynamicData.ModelProviders { ////// Base provider class for tables. /// Each provider type (e.g. Linq To Sql, Entity Framework, 3rd party) extends this class. /// public abstract class TableProvider { private Type _rootEntityType; private string _dataContextPropertyName; internal TableProvider() { // for unit testing } ////// ctor /// /// the model this table belongs to protected TableProvider(DataModelProvider model) { if (model == null) { throw new ArgumentNullException("model"); } DataModel = model; } ////// readable representation /// ///[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] public override string ToString() { // To help identifying objects in debugger return Name ?? base.ToString(); } /// /// Provides access to attributes defined for the table represented by this provider. /// public virtual AttributeCollection Attributes { get { return GetTypeDescriptor().GetAttributes(); } } public virtual ICustomTypeDescriptor GetTypeDescriptor() { #if ORYX_VNEXT return MetadataHandlerRegistration.GetTypeDescriptor(EntityType); #else return TypeDescriptor.GetProvider(EntityType).GetTypeDescriptor(EntityType); #endif } ////// The name of the table. Typically, this is the name of the property in the data context class /// public virtual string Name { get; protected set; } ////// The CLR type that represents this table /// public virtual Type EntityType { get; protected set; } ////// The collection of columns in this table /// public abstract ReadOnlyCollectionColumns { get; } /// /// The IQueryable that returns the elements of this table /// public abstract IQueryable GetQuery(object context); ////// The data model provider that this table is part of /// public DataModelProvider DataModel { get; internal set; } ////// Get the value of a foreign key for a given row. By default, it just looks up a property by that name /// public virtual object EvaluateForeignKey(object row, string foreignKeyName) { return System.Web.UI.DataBinder.GetPropertyValue(row, foreignKeyName); } ////// Return the parent type of this entity's inheritance hierarchy; if the type is at the top /// of an inheritance hierarchy or does not have any inheritance, will return null. /// public virtual Type ParentEntityType { get; protected set; } ////// Return the root type of this entity's inheritance hierarchy; if the type is at the top /// of an inheritance hierarchy or does not have any inheritance, will return EntityType. /// public virtual Type RootEntityType { get { return _rootEntityType ?? EntityType; } protected set { _rootEntityType = value; } } ////// Name of table coming from the property on the data context. E.g. the value is "Products" for /// a table that is part of the NorthwindDataContext.Products collection. If this value has not /// been set, it will return the value of the Name property. /// public virtual string DataContextPropertyName { get { return _dataContextPropertyName ?? Name; } protected set { _dataContextPropertyName = value; } } ////// Returns whether the passed in user is allowed to delete items from the table /// public virtual bool CanDelete(IPrincipal principal) { if (principal == null) { throw new ArgumentNullException("principal"); } return true; } ////// Returns whether the passed in user is allowed to insert into the table /// public virtual bool CanInsert(IPrincipal principal) { if (principal == null) { throw new ArgumentNullException("principal"); } return true; } ////// Returns whether the passed in user is allowed to read from the table /// public virtual bool CanRead(IPrincipal principal) { if (principal == null) { throw new ArgumentNullException("principal"); } return true; } ////// Returns whether the passed in user is allowed to make changes tothe table /// public virtual bool CanUpdate(IPrincipal principal) { if (principal == null) { throw new ArgumentNullException("principal"); } return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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