/// <summary>
/// 将为 ExecuteSelect(DataSourceSelectArguments) 操作请求的功能与指定的数据源视图所支持的功能进行比较。
/// </summary>
/// <param name="view"></param>
public void RaiseUnsupportedCapabilitiesError(DataSourceViewEx view)
{
DataSourceCapabilities capabilities = this.requestedCapabilities & ~this.supportedCapabilities;
if ((capabilities & DataSourceCapabilities.Sort) != DataSourceCapabilities.None)
view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.Sort);
if ((capabilities & DataSourceCapabilities.Page) != DataSourceCapabilities.None)
view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.Page);
if ((capabilities & DataSourceCapabilities.RetrieveTotalRowCount) != DataSourceCapabilities.None)
view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.RetrieveTotalRowCount);
}
DataSourceViewEx ConnectToDataSourceView()
{
if (!this.currentViewValid || base.DesignMode)
{
if (this.currentView != null)
this.currentView.DataSourceViewChanged -= new EventHandler(this.OnDataSourceViewChanged);
this.currentDataSource = this.GetDataSource();
string dataMember = this.DataMember;
if (this.currentDataSource == null)
{
//this.OnBuildDataSource(EventArgs.Empty);
this.currentDataSource = new ReadOnlyDataSourceEx(this.DataSource, dataMember);
}
this.currentDataSourceValid = true;
DataSourceViewEx view = this.currentDataSource.GetView(dataMember);
if (view == null)
throw new InvalidOperationException("DataControl_ViewNotFound");
else
{
this.currentView = view;
this.currentView.DataSourceViewChanged += new EventHandler(this.OnDataSourceViewChanged);
this.currentViewValid = true;
}
}
return this.currentView;
}