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//------------------------------------------------------------------------------
// <copyright file="ObjectDataSource.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Drawing;
using System.Drawing.Design;
using System.Globalization;
using System.Text;
using System.Web.Caching;
using System.Web.UI;
/// <devdoc>
/// Represents a data source that calls methods on a business object in order to
/// perform the Delete, Insert, Select, and Update operations. The business object
/// is specified in the TypeName property.
/// </devdoc>
[
DefaultEvent("Selecting"),
DefaultProperty("TypeName"),
Designer("System.Web.UI.Design.WebControls.ObjectDataSourceDesigner, " + AssemblyRef.SystemDesign),
ParseChildren(true),
PersistChildren(false),
ToolboxBitmap(typeof(ObjectDataSource)),
WebSysDescription(SR.ObjectDataSource_Description),
WebSysDisplayName(SR.ObjectDataSource_DisplayName)
]
public class ObjectDataSource : DataSourceControl {
private const string DefaultViewName = "DefaultView";
private SqlDataSourceCache _cache;
private ObjectDataSourceView _view;
private ICollection _viewNames;
/// <devdoc>
/// Creates a new instance of ObjectDataSource.
/// </devdoc>
public ObjectDataSource() {
}
/// <devdoc>
/// Creates a new instance of ObjectDataSource with a specified type name and select method.
/// </devdoc>
public ObjectDataSource(string typeName, string selectMethod) {
TypeName = typeName;
SelectMethod = selectMethod;
}
/// <devdoc>
/// Specifies the cache settings for this data source. For the cache to
/// work, the SelectMethod must return a DataSet.
/// </devdoc>
internal SqlDataSourceCache Cache {
get {
if (_cache == null) {
_cache = new SqlDataSourceCache();
}
return _cache;
}
}
/// <devdoc>
/// The duration, in seconds, of the expiration. The expiration policy is specified by the CacheExpirationPolicy property.
/// </devdoc>
[
DefaultValue(DataSourceCache.Infinite),
TypeConverterAttribute(typeof(DataSourceCacheDurationConverter)),
WebCategory("Cache"),
WebSysDescription(SR.DataSourceCache_Duration),
]
public virtual int CacheDuration {
get {
return Cache.Duration;
}
set {
Cache.Duration = value;
}
}
/// <devdoc>
/// The expiration policy of the cache. The duration for the expiration is specified by the CacheDuration property.
/// </devdoc>
[
DefaultValue(DataSourceCacheExpiry.Absolute),
WebCategory("Cache"),
WebSysDescription(SR.DataSourceCache_ExpirationPolicy),
]
public virtual DataSourceCacheExpiry CacheExpirationPolicy {
get {
return Cache.ExpirationPolicy;
}
set {
Cache.ExpirationPolicy = value;
}
}
/// <devdoc>
/// Indicates an arbitrary cache key to make this cache entry depend on. This allows
/// the user to further customize when this cache entry will expire.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Cache"),
WebSysDescription(SR.DataSourceCache_KeyDependency),
]
public virtual string CacheKeyDependency {
get {
return Cache.KeyDependency;
}
set {
Cache.KeyDependency = value;
}
}
/// <devdoc>
/// Whether the commands pass old values in the parameter collection.
/// </devdoc>
[
DefaultValue(ConflictOptions.OverwriteChanges),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_ConflictDetection),
]
public ConflictOptions ConflictDetection {
get {
return GetView().ConflictDetection;
}
set {
GetView().ConflictDetection = value;
}
}
/// <devdoc>
/// Whether null values passed into insert/update/delete operations
/// will be converted to System.DbNull.
/// </devdoc>
[
DefaultValue(false),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_ConvertNullToDBNull),
]
public bool ConvertNullToDBNull {
get {
return GetView().ConvertNullToDBNull;
}
set {
GetView().ConvertNullToDBNull = value;
}
}
/// <devdoc>
/// An optional type that is used for update, insert, and delete
/// scenarios where the object's methods take in an aggregate object
/// rather than one parameter for each property in the selected data.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_DataObjectTypeName),
]
public string DataObjectTypeName {
get {
return GetView().DataObjectTypeName;
}
set {
GetView().DataObjectTypeName = value;
}
}
/// <devdoc>
/// The method to execute when Delete() is called.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_DeleteMethod),
]
public string DeleteMethod {
get {
return GetView().DeleteMethod;
}
set {
GetView().DeleteMethod = value;
}
}
/// <devdoc>
// Collection of parameters used when calling the DeleteMethod. These parameters are merged with the parameters provided by data-bound controls.
/// </devdoc>
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.ParameterCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_DeleteParameters),
]
public ParameterCollection DeleteParameters {
get {
return GetView().DeleteParameters;
}
}
/// <devdoc>
/// Whether caching is enabled for this data source.
/// </devdoc>
[
DefaultValue(false),
WebCategory("Cache"),
WebSysDescription(SR.DataSourceCache_Enabled),
]
public virtual bool EnableCaching {
get {
return Cache.Enabled;
}
set {
Cache.Enabled = value;
}
}
/// <devdoc>
/// Indicates whether the Select method supports paging. If this is set to true, the
/// StartRowIndexParameterName and MaximumRowsParameterName properties must be set to the
/// names of the parameters of the Select method that accept the values for the starting
/// record to retrieve and the number of records to retrieve.
/// </devdoc>
[
DefaultValue(false),
WebCategory("Paging"),
WebSysDescription(SR.ObjectDataSource_EnablePaging),
]
public bool EnablePaging {
get {
return GetView().EnablePaging;
}
set {
GetView().EnablePaging = value;
}
}
/// <devdoc>
/// Filter expression used when Select() is called. Filtering is only available when the SelectMethod returns a DataSet.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_FilterExpression),
]
public string FilterExpression {
get {
return GetView().FilterExpression;
}
set {
GetView().FilterExpression = value;
}
}
/// <devdoc>
/// Collection of parameters used in the FilterExpression property. Filtering is only available when the SelectMethod returns a DataSet.
/// </devdoc>
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.ParameterCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_FilterParameters),
]
public ParameterCollection FilterParameters {
get {
return GetView().FilterParameters;
}
}
/// <devdoc>
/// The method to execute when Insert() is called.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_InsertMethod),
]
public string InsertMethod {
get {
return GetView().InsertMethod;
}
set {
GetView().InsertMethod = value;
}
}
/// <devdoc>
/// Collection of values used when calling the InsertMethod. These parameters are merged with the parameters provided by data-bound controls.
/// </devdoc>
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.ParameterCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_InsertParameters),
]
public ParameterCollection InsertParameters {
get {
return GetView().InsertParameters;
}
}
/// <devdoc>
/// When EnablePaging is set to true, this property indicates the parameter of the Select
/// method that accepts the value for the number of records to retrieve.
/// </devdoc>
[
DefaultValue("maximumRows"),
WebCategory("Paging"),
WebSysDescription(SR.ObjectDataSource_MaximumRowsParameterName),
]
public string MaximumRowsParameterName {
get {
return GetView().MaximumRowsParameterName;
}
set {
GetView().MaximumRowsParameterName = value;
}
}
/// <devdoc>
/// The format string applied to the names of the old values parameters
/// </devdoc>
[
DefaultValue("{0}"),
WebCategory("Data"),
WebSysDescription(SR.DataSource_OldValuesParameterFormatString),
]
public string OldValuesParameterFormatString {
get {
return GetView().OldValuesParameterFormatString;
}
set {
GetView().OldValuesParameterFormatString = value;
}
}
/// <devdoc>
/// The command to execute when Select is called on the ObjectDataSourceView, requesting the total number of rows.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Paging"),
WebSysDescription(SR.ObjectDataSource_SelectCountMethod),
]
public string SelectCountMethod {
get {
return GetView().SelectCountMethod;
}
set {
GetView().SelectCountMethod = value;
}
}
/// <devdoc>
/// The method to execute when Select() is called.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_SelectMethod),
]
public string SelectMethod {
get {
return GetView().SelectMethod;
}
set {
GetView().SelectMethod = value;
}
}
/// <devdoc>
/// Collection of parameters used when calling the SelectMethod.
/// </devdoc>
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.ParameterCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_SelectParameters),
]
public ParameterCollection SelectParameters {
get {
return GetView().SelectParameters;
}
}
/// <devdoc>
/// The name of the parameter in the SelectMethod that specifies the
/// sort expression. This parameter's value will be automatically set
/// at runtime with the appropriate sort expression.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_SortParameterName),
]
public string SortParameterName {
get {
return GetView().SortParameterName;
}
set {
GetView().SortParameterName = value;
}
}
/// <devdoc>
/// A semi-colon delimited string indicating which databases to use for the dependency in the format "database1:table1;database2:table2".
/// </devdoc>
[
DefaultValue(""),
WebCategory("Cache"),
WebSysDescription(SR.SqlDataSourceCache_SqlCacheDependency),
]
public virtual string SqlCacheDependency {
get {
return Cache.SqlCacheDependency;
}
set {
Cache.SqlCacheDependency = value;
}
}
/// <devdoc>
/// When EnablePaging is set to true, this property indicates the parameter of the Select
/// method that accepts the value for the number of first record to retrieve.
/// </devdoc>
[
DefaultValue("startRowIndex"),
WebCategory("Paging"),
WebSysDescription(SR.ObjectDataSource_StartRowIndexParameterName),
]
public string StartRowIndexParameterName {
get {
return GetView().StartRowIndexParameterName;
}
set {
GetView().StartRowIndexParameterName = value;
}
}
/// <devdoc>
/// The type that contains the methods specified in this control.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_TypeName),
]
public string TypeName {
get {
return GetView().TypeName;
}
set {
GetView().TypeName = value;
}
}
/// <devdoc>
/// The method to execute when Update() is called.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_UpdateMethod),
]
public string UpdateMethod {
get {
return GetView().UpdateMethod;
}
set {
GetView().UpdateMethod = value;
}
}
/// <devdoc>
/// Collection of parameters and values used when calling the UpdateMethod. These parameters are merged with the parameters provided by data-bound controls.
/// </devdoc>
[
DefaultValue(null),
Editor("System.Web.UI.Design.WebControls.ParameterCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
MergableProperty(false),
PersistenceMode(PersistenceMode.InnerProperty),
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_UpdateParameters),
]
public ParameterCollection UpdateParameters {
get {
return GetView().UpdateParameters;
}
}
/// <summary>
/// Indicates which <see cref='System.Globalization.CultureInfo'/> is used by ObjectDataSource
/// when converting string values to actual types of properties while constructing an object of type
/// <see cref='System.Web.UI.WebControls.ObjectDataSource.DataObjectTypeName'/>.
/// </summary>
[
DefaultValue(ParsingCulture.Invariant),
WebCategory("Behavior"),
WebSysDescription(SR.ObjectDataSource_ParsingCulture)
]
public ParsingCulture ParsingCulture {
get {
return GetView().ParsingCulture;
}
set {
GetView().ParsingCulture = value;
}
}
/// <devdoc>
/// This event is raised after the Delete operation has completed.
/// Handle this event if you need to examine the return values of
/// the method call, or examine an exception that may have been thrown.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Deleted),
]
public event ObjectDataSourceStatusEventHandler Deleted {
add {
GetView().Deleted += value;
}
remove {
GetView().Deleted -= value;
}
}
/// <devdoc>
/// This event is raised before the Delete operation has been executed.
/// Handle this event if you need to validate the values of parameters or
/// change their values.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Deleting),
]
public event ObjectDataSourceMethodEventHandler Deleting {
add {
GetView().Deleting += value;
}
remove {
GetView().Deleting -= value;
}
}
/// <devdoc>
/// This event is raised before the Filter operation takes place.
/// Handle this event if you want to perform validation operations on
/// the parameter values. This event is only raised if the FilterExpression
/// is set. If the Cancel property of the event arguments is set to true,
/// the Select operation is aborted and the operation will return null.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Filtering),
]
public event ObjectDataSourceFilteringEventHandler Filtering {
add {
GetView().Filtering += value;
}
remove {
GetView().Filtering -= value;
}
}
/// <devdoc>
/// This event is raised after the Insert operation has completed.
/// Handle this event if you need to examine the return values of
/// the method call, or examine an exception that may have been thrown.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Inserted),
]
public event ObjectDataSourceStatusEventHandler Inserted {
add {
GetView().Inserted += value;
}
remove {
GetView().Inserted -= value;
}
}
/// <devdoc>
/// This event is raised before the Insert operation has been executed.
/// Handle this event if you need to validate the values of parameters or
/// change their values.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Inserting),
]
public event ObjectDataSourceMethodEventHandler Inserting {
add {
GetView().Inserting += value;
}
remove {
GetView().Inserting -= value;
}
}
/// <devdoc>
/// This event is raised after the instance of the object has been created.
/// Handle this event if you need to set additional properties on the
/// object before any other methods are called. This event will not be
/// raised if a custom instance was provided in the ObjectCreating event.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_ObjectCreated),
]
public event ObjectDataSourceObjectEventHandler ObjectCreated {
add {
GetView().ObjectCreated += value;
}
remove {
GetView().ObjectCreated -= value;
}
}
/// <devdoc>
/// This event is raised before the instance of the object has been created.
/// Handle this event if you need to call a non-default constructor on the
/// object. Set the ObjectInstance property of the EventArgs with the
/// custom instance. If this is set, the ObjectCreated event will not be
/// raised.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_ObjectCreating),
]
public event ObjectDataSourceObjectEventHandler ObjectCreating {
add {
GetView().ObjectCreating += value;
}
remove {
GetView().ObjectCreating -= value;
}
}
/// <devdoc>
/// This event is raised before the instance of the object is disposed.
/// Handle this event if you need to retrieve properties on the
/// object before it is disposed. If the object implements the IDispoable
/// interface, then the Dispose() method will be called automatically.
/// Set the Cancel property of the event args to true if you do not want
/// IDisposable.Dispose() to be called automatically.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_ObjectDisposing),
]
public event ObjectDataSourceDisposingEventHandler ObjectDisposing {
add {
GetView().ObjectDisposing += value;
}
remove {
GetView().ObjectDisposing -= value;
}
}
/// <devdoc>
/// This event is raised after the Select operation has completed.
/// Handle this event if you need to examine the return values of
/// the method call, or examine an exception that may have been thrown.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_Selected),
]
public event ObjectDataSourceStatusEventHandler Selected {
add {
GetView().Selected += value;
}
remove {
GetView().Selected -= value;
}
}
/// <devdoc>
/// This event is raised before the Select operation has been executed.
/// Handle this event if you need to validate the values of parameters or
/// change their values.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.ObjectDataSource_Selecting),
]
public event ObjectDataSourceSelectingEventHandler Selecting {
add {
GetView().Selecting += value;
}
remove {
GetView().Selecting -= value;
}
}
/// <devdoc>
/// This event is raised after the Update operation has completed.
/// Handle this event if you need to examine the return values of
/// the method call, or examine an exception that may have been thrown.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Updated),
]
public event ObjectDataSourceStatusEventHandler Updated {
add {
GetView().Updated += value;
}
remove {
GetView().Updated -= value;
}
}
/// <devdoc>
/// This event is raised before the Update operation has been executed.
/// Handle this event if you need to validate the values of parameters or
/// change their values.
/// </devdoc>
[
WebCategory("Data"),
WebSysDescription(SR.DataSource_Updating),
]
public event ObjectDataSourceMethodEventHandler Updating {
add {
GetView().Updating += value;
}
remove {
GetView().Updating -= value;
}
}
/// <devdoc>
/// Creates a unique cache key for this data source's data.
/// </devdoc>
internal string CreateCacheKey(int startRowIndex, int maximumRows) {
StringBuilder sb = CreateRawCacheKey();
sb.Append(':');
sb.Append(startRowIndex.ToString(CultureInfo.InvariantCulture));
sb.Append(':');
sb.Append(maximumRows.ToString(CultureInfo.InvariantCulture));
return sb.ToString();
}
/// <devdoc>
/// Creates the cache key for the master (parent) cache entry, which holds the total row count.
/// </devdoc>
internal string CreateMasterCacheKey() {
return CreateRawCacheKey().ToString();
}
/// <devdoc>
/// Returns the string for the raw (unhashed) master cache key.
/// </devdoc>
[SuppressMessage("Microsoft.Usage", "CA2303:FlagTypeGetHashCode", Justification = "This is specifically on ObjectDataSource type which is not a com interop type.")]
private StringBuilder CreateRawCacheKey() {
// Note: The cache key will contain information such as type names and
// method names, however it will be stored in the internal cache, which is
// not accessible to page developers, so it is secure.
StringBuilder sb = new StringBuilder(CacheInternal.PrefixDataSourceControl, 1024);
sb.Append(GetType().GetHashCode().ToString(CultureInfo.InvariantCulture));
sb.Append(":");
sb.Append(CacheDuration.ToString(CultureInfo.InvariantCulture));
sb.Append(':');
sb.Append(((int)CacheExpirationPolicy).ToString(CultureInfo.InvariantCulture));
sb.Append(":");
sb.Append(SqlCacheDependency);
sb.Append(":");
sb.Append(TypeName);
sb.Append(":");
sb.Append(SelectMethod);
// Append parameter names and values
if (SelectParameters.Count > 0) {
sb.Append("?");
IDictionary parameters = SelectParameters.GetValues(Context, this);
foreach (DictionaryEntry entry in parameters) {
sb.Append(entry.Key.ToString());
if ((entry.Value != null) && (entry.Value != DBNull.Value)) {
sb.Append("=");
sb.Append(entry.Value.ToString());
}
else {
if (entry.Value == DBNull.Value) {
sb.Append("(dbnull)");
}
else {
sb.Append("(null)");
}
}
sb.Append("&");
}
}
return sb;
}
/// <devdoc>
/// Deletes rows from the data source using the parameters specified in the DeleteParameters collection.
/// </devdoc>
public int Delete() {
return GetView().Delete(null, null);
}
/// <devdoc>
/// Dynamically creates the default (and only) ObjectDataSourceView on demand.
/// </devdoc>
private ObjectDataSourceView GetView() {
if (_view == null) {
_view = new ObjectDataSourceView(this, DefaultViewName, Context);
if (IsTrackingViewState) {
((IStateManager)_view).TrackViewState();
}
}
return _view;
}
/// <devdoc>
/// Gets the view associated with this data source.
/// </devdoc>
protected override DataSourceView GetView(string viewName) {
if (viewName == null || (viewName.Length != 0 && !String.Equals(viewName, DefaultViewName, StringComparison.OrdinalIgnoreCase))) {
throw new ArgumentException(SR.GetString(SR.DataSource_InvalidViewName, ID, DefaultViewName), "viewName");
}
return GetView();
}
/// <devdoc>
/// </devdoc>
protected override ICollection GetViewNames() {
if (_viewNames == null) {
_viewNames = new string[1] { DefaultViewName };
}
return _viewNames;
}
/// <devdoc>
/// Inserts a new row with names and values specified the InsertValues collection.
/// </devdoc>
public int Insert() {
return GetView().Insert(null);
}
/// <devdoc>
/// Invalidates a cache entry.
/// </devdoc>
internal void InvalidateCacheEntry() {
string key = CreateMasterCacheKey();
Cache.Invalidate(key);
}
/// <devdoc>
/// Event handler for the Page's LoadComplete event.
/// Updates the parameters' values to possibly raise a DataSourceViewChanged event, causing bound controls to re-databind.
/// </devdoc>
private void LoadCompleteEventHandler(object sender, EventArgs e) {
SelectParameters.UpdateValues(Context, this);
FilterParameters.UpdateValues(Context, this);
}
/// <devdoc>
/// Loads data from the cache.
/// </devdoc>
internal object LoadDataFromCache(int startRowIndex, int maximumRows) {
string key = CreateCacheKey(startRowIndex, maximumRows);
return Cache.LoadDataFromCache(key);
}
/// <devdoc>
/// Loads data from the cache.
/// </devdoc>
internal int LoadTotalRowCountFromCache() {
string key = CreateMasterCacheKey();
object data = Cache.LoadDataFromCache(key);
if (data is int)
return (int)data;
return -1;
}
/// <devdoc>
/// Loads view state.
/// </devdoc>
protected override void LoadViewState(object savedState) {
Pair myState = (Pair)savedState;
if (savedState == null) {
base.LoadViewState(null);
}
else {
base.LoadViewState(myState.First);
if (myState.Second != null) {
((IStateManager)GetView()).LoadViewState(myState.Second);
}
}
}
/// <devdoc>
/// Adds LoadComplete event handler to the page.
/// </devdoc>
protected internal override void OnInit(EventArgs e) {
base.OnInit(e);
if (Page != null) {
Page.LoadComplete += new EventHandler(LoadCompleteEventHandler);
}
}
/// <devdoc>
/// Saves paged data to cache, creating a dependency on the updated row count
/// </devdoc>
internal void SaveDataToCache(int startRowIndex, int maximumRows, object data) {
string key = CreateCacheKey(startRowIndex, maximumRows);
string parentKey = CreateMasterCacheKey();
if (Cache.LoadDataFromCache(parentKey) == null) {
Cache.SaveDataToCache(parentKey, -1);
}
CacheDependency cacheDependency = new CacheDependency(0, new string[0], new string[] { parentKey });
Cache.SaveDataToCache(key, data, cacheDependency);
}
/// <devdoc>
/// Saves the total row count to cache.
/// </devdoc>
internal void SaveTotalRowCountToCache(int totalRowCount) {
string key = CreateMasterCacheKey();
Cache.SaveDataToCache(key, totalRowCount);
}
/// <devdoc>
/// Saves view state.
/// </devdoc>
protected override object SaveViewState() {
Pair myState = new Pair();
myState.First = base.SaveViewState();
if (_view != null) {
myState.Second = ((IStateManager)_view).SaveViewState();
}
if ((myState.First == null) &&
(myState.Second == null)) {
return null;
}
return myState;
}
/// <devdoc>
/// Returns all the rows of the datasource.
/// Parameters are taken from the SelectParameters property collection.
/// </devdoc>
public IEnumerable Select() {
return GetView().Select(DataSourceSelectArguments.Empty);
}
/// <devdoc>
/// Starts tracking view state.
/// </devdoc>
protected override void TrackViewState() {
base.TrackViewState();
if (_view != null) {
((IStateManager)_view).TrackViewState();
}
}
/// <devdoc>
/// Updates rows in the data source indicated by the parameters in the UpdateParameters collection.
/// </devdoc>
public int Update() {
return GetView().Update(null, null, null);
}
}
}
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