Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / FilterRepeater.cs / 1305376 / FilterRepeater.cs
namespace System.Web.DynamicData { using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.Linq; using System.Security.Permissions; using System.Web; using System.Web.Compilation; using System.Web.Resources; using System.Web.UI; using System.Web.UI.WebControls; ////// Repeater Control that enumerates over all the filterable columns in a table /// [ToolboxItem(false)] [ParseChildren(true)] public class FilterRepeater : Repeater, IWhereParametersProvider { private string _contextTypeName; private string _dynamicFilterContainerId; private List_filters = new List (); private MetaTable _table; private string _tableName; /// /// The context that the filtered table belongs to /// [Category("Data"), DefaultValue((string)null), Themeable(false)] // public string ContextTypeName { get { return _contextTypeName ?? String.Empty; } set { if (!ContextTypeName.Equals(value)) { _contextTypeName = value; _table = null; } } } ////// ID of the filter control in the ItemTemplate. By default, it's "DynamicFilter". /// [Category("Behavior"), DefaultValue("DynamicFilter"), Themeable(false), IDReferenceProperty(typeof(FilterUserControlBase)), ResourceDescription("DynamicFilterRepeater_DynamicFilterContainerId")] public string DynamicFilterContainerId { get { if (String.IsNullOrEmpty(_dynamicFilterContainerId)) { _dynamicFilterContainerId = "DynamicFilter"; } return _dynamicFilterContainerId; } set { _dynamicFilterContainerId = value; } } ////// Returns the table associated with this filter repeater. /// public MetaTable Table { get { if (_table == null) { _table = GetTable(); } return _table; } } ////// Name of the table being filtered /// [Category("Data"), DefaultValue((string)null), Themeable(false), ResourceDescription("FilterRepeater_TableName")] public string TableName { get { return _tableName ?? String.Empty; } set { if (!TableName.Equals(value)) { _tableName = value; _table = null; } } } public override bool Visible { get { // return base.Visible && _filters.Count > 0; } set { base.Visible = value; } } ////// same as base. /// public override void DataBind() { // Start with an empty filters list when DataBinding. This is needed when DataBind() // gets called multiple times. _filters.Clear(); base.DataBind(); } ////// Returns an enumeration of the columns belonging to the table associated with /// this filter repeater that are sortable (by default, foreign key and boolean columns) /// that are scaffoldable /// ///protected internal virtual IEnumerable GetFilteredColumns() { return Table.Columns.Where(c => IsFilterableColumn(c)); } internal IEnumerable GetFilterControls() { return _filters; } private MetaTable GetTable() { if (!String.IsNullOrEmpty(ContextTypeName) || !String.IsNullOrEmpty(TableName)) { // get table from control properties string contextTypeName = ContextTypeName; string tableName = TableName; if (String.IsNullOrEmpty(ContextTypeName)) { throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_MissingContextTypeName, ID)); } else if (String.IsNullOrEmpty(tableName)) { throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_MissingTableName, ID)); } Type contextType = null; if (!String.IsNullOrEmpty(ContextTypeName)) { try { contextType = BuildManager.GetType(contextTypeName, /*throwOnError*/ true, /*ignoreCase*/ true); } catch (Exception e) { throw new InvalidOperationException(String.Format( CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_InvalidContextTypeName, ID, contextTypeName), e); } } MetaModel model; try { model = MetaModel.GetModel(contextType); } catch (InvalidOperationException e) { throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_UnknownContextTypeName, ID, contextType.FullName), e); } try { return model.GetTable(tableName); } catch (ArgumentException e) { throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_InvalidTableName, ID, tableName), e); } } else { MetaTable table = DynamicDataRouteHandler.GetRequestMetaTable(HttpContext.Current); if (table == null) { throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_CantInferInformationFromUrl, ID)); } return table; } } internal static bool IsFilterableColumn(MetaColumn column) { if (!column.Scaffold) return false; if (column.IsCustomProperty) return false; if (column is MetaForeignKeyColumn) return true; if (column.ColumnType == typeof(bool)) return true; return false; } /// /// gets called for every item and alternating item template being instantiated by this /// repeater during databinding /// /// protected virtual void OnFilterItemCreated(RepeaterItem item) { var filter = item.FindControl(DynamicFilterContainerId) as FilterUserControlBase; if (filter == null) { throw new InvalidOperationException( String.Format(CultureInfo.CurrentCulture, DynamicDataResources.FilterRepeater_CouldNotFindControlInTemplate, ID, typeof(FilterUserControlBase).FullName, DynamicFilterContainerId)); } var column = (MetaColumn)item.DataItem; filter.TableName = column.Table.Name; filter.DataField = column.Name; filter.ContextTypeName = column.Table.DataContextType.AssemblyQualifiedName; // Keep track of all the filters we create _filters.Add(filter); } ////// See base class documentation /// [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers")] protected override void OnInit(EventArgs e) { base.OnInit(e); // Don't do anything in Design mode if (DesignMode) { return; } Page.InitComplete += new EventHandler(Page_InitComplete); } ////// See base class documentation /// [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers")] protected override void OnItemCreated(RepeaterItemEventArgs e) { base.OnItemCreated(e); if (DesignMode) { return; } ListItemType listItemType = e.Item.ItemType; if (listItemType == ListItemType.Item || listItemType == ListItemType.AlternatingItem) { OnFilterItemCreated(e.Item); } } private void Page_InitComplete(object sender, EventArgs e) { // We need to do this in InitComplete rather than Init to allow the user to set the // TableName in Page_Init DataSource = GetFilteredColumns(); DataBind(); } #region IWhereParametersProvider Members ////// See IWhereParametersProvider /// public virtual IEnumerableGetWhereParameters(IDynamicDataSource dataSource) { // Add all the specific filters as where parameters return GetFilterControls().Select(filter => (Parameter)new DynamicControlParameter(filter.UniqueID) { Name = filter.DataField, }); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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