Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / WebControls / AccessDataSource.cs / 1305376 / AccessDataSource.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Data.OleDb; using System.Diagnostics; using System.Drawing; using System.Drawing.Design; using System.IO; using System.Text; using System.Web.Caching; using System.Web.UI; ////// Allows a user to create a declarative connection to an Access database in a .aspx page. /// [ Designer("System.Web.UI.Design.WebControls.AccessDataSourceDesigner, " + AssemblyRef.SystemDesign), ToolboxBitmap(typeof(AccessDataSource)), WebSysDescription(SR.AccessDataSource_Description), WebSysDisplayName(SR.AccessDataSource_DisplayName) ] public class AccessDataSource : SqlDataSource { private const string OleDbProviderName = "System.Data.OleDb"; private const string JetProvider = "Microsoft.Jet.OLEDB.4.0"; private const string Access2007Provider = "Microsoft.ACE.OLEDB.12.0"; private const string Access2007FileExtension = ".accdb"; private FileDataSourceCache _cache; private string _connectionString; private string _dataFile; private string _physicalDataFile; ////// Creates a new instance of AccessDataSource. /// public AccessDataSource() : base() { } ////// Creates a new instance of AccessDataSource with a specified connection string and select command. /// public AccessDataSource(string dataFile, string selectCommand) : base() { if (String.IsNullOrEmpty(dataFile)) { throw new ArgumentNullException("dataFile"); } DataFile = dataFile; SelectCommand = selectCommand; } ////// Specifies the cache settings for this data source. For the cache to /// work, the DataSourceMode must be set to DataSet. /// internal override DataSourceCache Cache { get { if (_cache == null) { _cache = new FileDataSourceCache(); } return _cache; } } ////// Gets the connection string for the AccessDataSource. This property is auto-generated and cannot be set. /// [ Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override string ConnectionString { get { if (_connectionString == null) { _connectionString = CreateConnectionString(); } return _connectionString; } set { throw new InvalidOperationException(SR.GetString(SR.AccessDataSource_CannotSetConnectionString)); } } ////// The name of an Access database file. /// This property is not stored in ViewState. /// [ DefaultValue(""), Editor("System.Web.UI.Design.MdbDataFileEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebCategory("Data"), WebSysDescription(SR.AccessDataSource_DataFile), ] public string DataFile { get { return (_dataFile == null) ? String.Empty : _dataFile; } set { if (DataFile != value) { _dataFile = value; _connectionString = null; _physicalDataFile = null; RaiseDataSourceChangedEvent(EventArgs.Empty); } } } ////// Gets the file data source cache object. /// private FileDataSourceCache FileDataSourceCache { get { FileDataSourceCache fileCache = Cache as FileDataSourceCache; Debug.Assert(fileCache != null, "Cache object should be a FileDataSourceCache"); return fileCache; } } ////// Gets the Physical path of the data file. /// private string PhysicalDataFile { get { if (_physicalDataFile == null) { _physicalDataFile = GetPhysicalDataFilePath(); } return _physicalDataFile; } } internal string NativeProvider { get { if (IsAccess2007) { return Access2007Provider; } return JetProvider; } } internal virtual bool IsAccess2007 { get { // Access 2007 changed the file format so we have to pick the right provider based on extension. return Path.GetExtension(PhysicalDataFile) == Access2007FileExtension; } } ////// Gets/sets the ADO.net managed provider name. This property is restricted to the OLE DB provider and cannot be set. /// [ Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override string ProviderName { get { return OleDbProviderName; } set { throw new InvalidOperationException(SR.GetString(SR.AccessDataSource_CannotSetProvider, ID)); } } ////// A semi-colon delimited string indicating which databases to use for the dependency in the format "database1:table1;database2:table2". /// [ Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override string SqlCacheDependency { get { throw new NotSupportedException(SR.GetString(SR.AccessDataSource_SqlCacheDependencyNotSupported, ID)); } set { throw new NotSupportedException(SR.GetString(SR.AccessDataSource_SqlCacheDependencyNotSupported, ID)); } } private void AddCacheFileDependency() { FileDataSourceCache.FileDependencies.Clear(); string filename = PhysicalDataFile; if (filename.Length > 0) { FileDataSourceCache.FileDependencies.Add(filename); } } ////// Creates a connection string for an Access database connection. /// The JET or ACE provider is used based on the DataFile extension, and the filename, username, password, and /// share mode are are set. /// private string CreateConnectionString() { return "Provider=" + NativeProvider + "; Data Source=" + PhysicalDataFile; } ////// Creates a new AccessDataSourceView. /// protected override SqlDataSourceView CreateDataSourceView(string viewName) { return new AccessDataSourceView(this, viewName, Context); } protected override DbProviderFactory GetDbProviderFactory() { return OleDbFactory.Instance; } ////// Gets the appropriate mapped path for the DataFile. /// private string GetPhysicalDataFilePath() { string filename = DataFile; if (filename.Length == 0) { return null; } if (!System.Web.Util.UrlPath.IsAbsolutePhysicalPath(filename)) { // Root relative path if (DesignMode) { // This exception should never be thrown - the designer always maps paths // before using the runtime control. throw new NotSupportedException(SR.GetString(SR.AccessDataSource_DesignTimeRelativePathsNotSupported, ID)); } filename = Context.Request.MapPath(filename, AppRelativeTemplateSourceDirectory, true); } HttpRuntime.CheckFilePermission(filename, true); // We also need to check for path discovery permissions for the // file since the page developer will be able to see the physical // path in the ConnectionString property. if (!HttpRuntime.HasPathDiscoveryPermission(filename)) { throw new HttpException(SR.GetString(SR.AccessDataSource_NoPathDiscoveryPermission, HttpRuntime.GetSafePath(filename), ID)); } return filename; } ////// Saves data to the cache. /// internal override void SaveDataToCache(int startRowIndex, int maximumRows, object data, CacheDependency dependency) { AddCacheFileDependency(); base.SaveDataToCache(startRowIndex, maximumRows, data, dependency); } /*internal override void SaveTotalRowCountToCache(int totalRowCount) { AddCacheFileDependency(); base.SaveTotalRowCountToCache(totalRowCount); }*/ } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Data.OleDb; using System.Diagnostics; using System.Drawing; using System.Drawing.Design; using System.IO; using System.Text; using System.Web.Caching; using System.Web.UI; ////// Allows a user to create a declarative connection to an Access database in a .aspx page. /// [ Designer("System.Web.UI.Design.WebControls.AccessDataSourceDesigner, " + AssemblyRef.SystemDesign), ToolboxBitmap(typeof(AccessDataSource)), WebSysDescription(SR.AccessDataSource_Description), WebSysDisplayName(SR.AccessDataSource_DisplayName) ] public class AccessDataSource : SqlDataSource { private const string OleDbProviderName = "System.Data.OleDb"; private const string JetProvider = "Microsoft.Jet.OLEDB.4.0"; private const string Access2007Provider = "Microsoft.ACE.OLEDB.12.0"; private const string Access2007FileExtension = ".accdb"; private FileDataSourceCache _cache; private string _connectionString; private string _dataFile; private string _physicalDataFile; ////// Creates a new instance of AccessDataSource. /// public AccessDataSource() : base() { } ////// Creates a new instance of AccessDataSource with a specified connection string and select command. /// public AccessDataSource(string dataFile, string selectCommand) : base() { if (String.IsNullOrEmpty(dataFile)) { throw new ArgumentNullException("dataFile"); } DataFile = dataFile; SelectCommand = selectCommand; } ////// Specifies the cache settings for this data source. For the cache to /// work, the DataSourceMode must be set to DataSet. /// internal override DataSourceCache Cache { get { if (_cache == null) { _cache = new FileDataSourceCache(); } return _cache; } } ////// Gets the connection string for the AccessDataSource. This property is auto-generated and cannot be set. /// [ Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override string ConnectionString { get { if (_connectionString == null) { _connectionString = CreateConnectionString(); } return _connectionString; } set { throw new InvalidOperationException(SR.GetString(SR.AccessDataSource_CannotSetConnectionString)); } } ////// The name of an Access database file. /// This property is not stored in ViewState. /// [ DefaultValue(""), Editor("System.Web.UI.Design.MdbDataFileEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebCategory("Data"), WebSysDescription(SR.AccessDataSource_DataFile), ] public string DataFile { get { return (_dataFile == null) ? String.Empty : _dataFile; } set { if (DataFile != value) { _dataFile = value; _connectionString = null; _physicalDataFile = null; RaiseDataSourceChangedEvent(EventArgs.Empty); } } } ////// Gets the file data source cache object. /// private FileDataSourceCache FileDataSourceCache { get { FileDataSourceCache fileCache = Cache as FileDataSourceCache; Debug.Assert(fileCache != null, "Cache object should be a FileDataSourceCache"); return fileCache; } } ////// Gets the Physical path of the data file. /// private string PhysicalDataFile { get { if (_physicalDataFile == null) { _physicalDataFile = GetPhysicalDataFilePath(); } return _physicalDataFile; } } internal string NativeProvider { get { if (IsAccess2007) { return Access2007Provider; } return JetProvider; } } internal virtual bool IsAccess2007 { get { // Access 2007 changed the file format so we have to pick the right provider based on extension. return Path.GetExtension(PhysicalDataFile) == Access2007FileExtension; } } ////// Gets/sets the ADO.net managed provider name. This property is restricted to the OLE DB provider and cannot be set. /// [ Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override string ProviderName { get { return OleDbProviderName; } set { throw new InvalidOperationException(SR.GetString(SR.AccessDataSource_CannotSetProvider, ID)); } } ////// A semi-colon delimited string indicating which databases to use for the dependency in the format "database1:table1;database2:table2". /// [ Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override string SqlCacheDependency { get { throw new NotSupportedException(SR.GetString(SR.AccessDataSource_SqlCacheDependencyNotSupported, ID)); } set { throw new NotSupportedException(SR.GetString(SR.AccessDataSource_SqlCacheDependencyNotSupported, ID)); } } private void AddCacheFileDependency() { FileDataSourceCache.FileDependencies.Clear(); string filename = PhysicalDataFile; if (filename.Length > 0) { FileDataSourceCache.FileDependencies.Add(filename); } } ////// Creates a connection string for an Access database connection. /// The JET or ACE provider is used based on the DataFile extension, and the filename, username, password, and /// share mode are are set. /// private string CreateConnectionString() { return "Provider=" + NativeProvider + "; Data Source=" + PhysicalDataFile; } ////// Creates a new AccessDataSourceView. /// protected override SqlDataSourceView CreateDataSourceView(string viewName) { return new AccessDataSourceView(this, viewName, Context); } protected override DbProviderFactory GetDbProviderFactory() { return OleDbFactory.Instance; } ////// Gets the appropriate mapped path for the DataFile. /// private string GetPhysicalDataFilePath() { string filename = DataFile; if (filename.Length == 0) { return null; } if (!System.Web.Util.UrlPath.IsAbsolutePhysicalPath(filename)) { // Root relative path if (DesignMode) { // This exception should never be thrown - the designer always maps paths // before using the runtime control. throw new NotSupportedException(SR.GetString(SR.AccessDataSource_DesignTimeRelativePathsNotSupported, ID)); } filename = Context.Request.MapPath(filename, AppRelativeTemplateSourceDirectory, true); } HttpRuntime.CheckFilePermission(filename, true); // We also need to check for path discovery permissions for the // file since the page developer will be able to see the physical // path in the ConnectionString property. if (!HttpRuntime.HasPathDiscoveryPermission(filename)) { throw new HttpException(SR.GetString(SR.AccessDataSource_NoPathDiscoveryPermission, HttpRuntime.GetSafePath(filename), ID)); } return filename; } ////// Saves data to the cache. /// internal override void SaveDataToCache(int startRowIndex, int maximumRows, object data, CacheDependency dependency) { AddCacheFileDependency(); base.SaveDataToCache(startRowIndex, maximumRows, data, dependency); } /*internal override void SaveTotalRowCountToCache(int totalRowCount) { AddCacheFileDependency(); base.SaveTotalRowCountToCache(totalRowCount); }*/ } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CodeValidator.cs
- RefType.cs
- Context.cs
- Camera.cs
- OdbcConnection.cs
- QilReference.cs
- SubMenuStyleCollectionEditor.cs
- GroupDescription.cs
- BaseCAMarshaler.cs
- RSAPKCS1SignatureFormatter.cs
- ImageButton.cs
- COM2IDispatchConverter.cs
- ProcessRequestArgs.cs
- ListControlActionList.cs
- FontConverter.cs
- CallbackHandler.cs
- UnsettableComboBox.cs
- RecipientIdentity.cs
- WpfPayload.cs
- Thread.cs
- WebBrowserEvent.cs
- GCHandleCookieTable.cs
- Events.cs
- CodeDOMProvider.cs
- TemplateAction.cs
- CompilationPass2Task.cs
- ScalarType.cs
- Binding.cs
- SerialErrors.cs
- DataPagerFieldCollection.cs
- ScrollEvent.cs
- CacheForPrimitiveTypes.cs
- counter.cs
- ToolboxSnapDragDropEventArgs.cs
- ResXResourceReader.cs
- ConnectionModeReader.cs
- Math.cs
- Environment.cs
- TrackingServices.cs
- QilList.cs
- UInt16.cs
- WindowsAuthenticationModule.cs
- GeneralTransform.cs
- DataControlLinkButton.cs
- TimeoutValidationAttribute.cs
- ExpressionVisitor.cs
- CodeSnippetStatement.cs
- CodeDomExtensionMethods.cs
- wgx_render.cs
- UnauthorizedAccessException.cs
- IOException.cs
- HtmlTableCell.cs
- ListViewItemSelectionChangedEvent.cs
- WorkItem.cs
- XmlReader.cs
- TextEditor.cs
- OverrideMode.cs
- SafeNativeMethods.cs
- SecurityTokenTypes.cs
- FixedSOMFixedBlock.cs
- SqlRemoveConstantOrderBy.cs
- LockRecursionException.cs
- ConnectionsZone.cs
- MgmtConfigurationRecord.cs
- SoapInteropTypes.cs
- SafeFileMappingHandle.cs
- SmiEventSink_Default.cs
- AsyncContentLoadedEventArgs.cs
- ComplexPropertyEntry.cs
- AppDomain.cs
- FreezableOperations.cs
- DbParameterCollection.cs
- UrlMappingCollection.cs
- ParameterModifier.cs
- RouteItem.cs
- ImageField.cs
- LZCodec.cs
- TogglePattern.cs
- XmlValueConverter.cs
- SmiEventSink.cs
- StaticContext.cs
- PageCatalogPart.cs
- AttachedPropertyBrowsableForTypeAttribute.cs
- ExpressionBuilderCollection.cs
- MemberDescriptor.cs
- ToolStripDropDownMenu.cs
- RenderDataDrawingContext.cs
- HttpProfileGroupBase.cs
- PassportPrincipal.cs
- dbenumerator.cs
- SrgsRuleRef.cs
- hebrewshape.cs
- ObjectDataSourceEventArgs.cs
- AnimationLayer.cs
- CompiledScopeCriteria.cs
- WebScriptEnablingElement.cs
- InternalControlCollection.cs
- Profiler.cs
- SettingsProperty.cs
- ObjectSecurity.cs