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//------------------------------------------------------------------------------
// <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
}
}
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