Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / DynamicControl.cs / 1305376 / DynamicControl.cs
namespace System.Web.DynamicData { using System.ComponentModel; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.Web.Resources; using System.Web.UI; using System.Collections.Generic; using System.Reflection; using System.Web.UI.WebControls; using System.Drawing; using System.Diagnostics; ////// Control used to render Dynamic Data driven UI /// [ToolboxBitmap(typeof(DynamicControl), "DynamicControl.bmp")] public class DynamicControl : Control, IAttributeAccessor, IFieldTemplateHost, IFieldFormattingOptions { private bool _customConvertEmptyStringToNullSet; private bool _customApplyFormatInEditModeSet; private MetaTable _table; private IMetaTable _iMetaTable; private IDictionary_attributes; private IMetaColumn _iMetaColumn; private MetaColumn _column; /// /// public DynamicControl() { } internal DynamicControl(IMetaTable table) { _iMetaTable = table; } internal DynamicControl(IMetaColumn column) { _iMetaColumn = column; } /// The mode that the associated field template should be in (readonly, edit, insert) public DynamicControl(DataBoundControlMode mode) { Mode = mode; } ////// The name of the column that this control handles /// [ Category("Data"), DefaultValue(""), ResourceDescription("DynamicControlFieldCommon_DataField") ] public string DataField { get { object o = ViewState["DataField"]; return ((o == null) ? String.Empty : (string)o); } set { if (!String.Equals(value, ViewState["DataField"])) { ViewState["DataField"] = value; } } } ////// The MetaColumn that this control is working with /// [Browsable(false)] public MetaColumn Column { get { return _column; } set { _column = value; _iMetaColumn = value; } } ////// The UIHint used by this control to locate the proper field template /// [ Category("Behavior"), DefaultValue(""), ResourceDescription("DynamicControlFieldCommon_UIHint") ] public virtual string UIHint { get { object o = ViewState["UIHint"]; return ((o == null) ? String.Empty : (string)o); } set { ViewState["UIHint"] = value; } } ////// Gets or sets the CSS class property of the DynamicControl /// [ Category("Appearance"), DefaultValue(""), CssClassProperty() ] public virtual string CssClass { get { object o = ViewState["CssClass"]; return ((o == null) ? String.Empty : (string)o); } set { ViewState["CssClass"] = value; } } ////// The MetaTable that this control is associated with /// [Browsable(false)] public virtual MetaTable Table { get { if (_table == null) { _table = this.FindMetaTable(); if (_table == null) { throw new Exception(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.DynamicControl_ControlNeedsToExistInADataControlUsingDynamicDataSource)); } } return _table; } } private IMetaTable IMetaTable { get { return _iMetaTable ?? Table; } } private IMetaColumn IMetaColumn { get { return _iMetaColumn; } set { _iMetaColumn = value; _column = value as MetaColumn; } } ////// The rendering mode: readonly, edit or insert /// [ DefaultValue(DataBoundControlMode.ReadOnly), Category("Behavior"), ResourceDescription("DynamicField_Mode") ] public DataBoundControlMode Mode { get { object o = ViewState["Mode"]; return ((o == null) ? DataBoundControlMode.ReadOnly : (DataBoundControlMode)o); } set { ViewState["Mode"] = value; } } ////// The validation group that the field template need to be in /// [ Category("Behavior"), DefaultValue(""), Themeable(false), ResourceDescription("DynamicControlFieldCommon_ValidationGroup") ] public virtual string ValidationGroup { get { object o = ViewState["ValidationGroup"]; return ((o == null) ? String.Empty : (string)o); } set { ViewState["ValidationGroup"] = value; } } internal Control CreateControl() { Debug.Assert(FieldTemplate == null); FieldTemplate = (Control)IMetaColumn.Model.FieldTemplateFactory.CreateFieldTemplate(Column, Mode, UIHint); if (FieldTemplate != null) { ((IFieldTemplate)FieldTemplate).SetHost(this); // If we got some extra attributes declared on the tag, assign them to the user control if it has matching properties if (_attributes != null) { var ucType = FieldTemplate.GetType(); foreach (var entry in _attributes) { // Look for a public property by that name on th user control var propInfo = ucType.GetProperty(entry.Key, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase); if (propInfo != null) { // Convert the value to the type of the property and set it var value = PropertyConverter.ObjectFromString(propInfo.PropertyType, propInfo, entry.Value); propInfo.SetValue(FieldTemplate, value, null); } } } // Give it the column name as its ID, unless there is already a control by that name string id = GetControlIDFromColumnName(IMetaColumn.Name); if (FindControl(id) == null) FieldTemplate.ID = id; } return FieldTemplate; } ////// 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; ResolveColumn(); FieldTemplate = CreateControl(); // Add it to the tree if (FieldTemplate != null) { Controls.Add(FieldTemplate); } } ////// Renders the underlying field template control. If this DynamicControl's CssClass tag is defined, /// the underlying control's output will be wrapped in a span tag with that css class applied. /// /// protected override void Render(HtmlTextWriter writer) { // In Design mode, simply render the string Databound. Ideally, we'd do something fancier // that takes into account the type of the column. But at lesat, rendering *something* makes // the design layout look reasonable if (DesignMode) { writer.Write(DynamicDataResources.DynamicControlDesignRender); return; } // If there is a CSS class, output it in a span tag. Otherwise, don't use any extra tag. if (!String.IsNullOrEmpty(CssClass)) { writer.AddAttribute(HtmlTextWriterAttribute.Class, CssClass); writer.RenderBeginTag(HtmlTextWriterTag.Span); base.Render(writer); writer.RenderEndTag(); } else { base.Render(writer); } } internal void ResolveColumn() { if (IMetaColumn == null) { if (String.IsNullOrEmpty(DataField)) { throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, DynamicDataResources.DynamicControl_ControlMustHaveDateFieldAttribute, GetType().Name, ID)); } IMetaColumn = IMetaTable.GetColumn(DataField); // Try to get them various settings from the model, unless they were explicitely // specified on the control if (String.IsNullOrEmpty(UIHint)) { UIHint = IMetaColumn.UIHint; } if (String.IsNullOrEmpty(DataFormatString)) { DataFormatString = IMetaColumn.DataFormatString; } if (String.IsNullOrEmpty(NullDisplayText)) { NullDisplayText = IMetaColumn.NullDisplayText; } if (!_customConvertEmptyStringToNullSet) { ConvertEmptyStringToNull = IMetaColumn.ConvertEmptyStringToNull; } if (!_customApplyFormatInEditModeSet) { ApplyFormatInEditMode = IMetaColumn.ApplyFormatInEditMode; } if (ViewState["HtmlEncode"] == null) { HtmlEncode = IMetaColumn.HtmlEncode; } } } ////// The Field Template that was created for this control /// [Browsable(false)] public Control FieldTemplate { get; private set; } internal static string GetControlIDFromColumnName(string columnName) { return "__" + columnName; } internal void SetAttributes(IDictionaryattributes) { _attributes = attributes; } #region IAttributeAccessor Members /// /// See IAttributeAccessor /// public string GetAttribute(string key) { if (_attributes == null) return String.Empty; return _attributes[key]; } ////// See IAttributeAccessor /// public void SetAttribute(string key, string value) { if (_attributes == null) { _attributes = new Dictionary(); } _attributes[key] = value; } #endregion #region IFieldTemplateHost Members IFieldFormattingOptions IFieldTemplateHost.FormattingOptions { get { return this; } } #endregion #region IFieldFormattingOptions Members /// /// See IFieldFormattingOptions /// [ Category("Behavior"), DefaultValue(false), ResourceDescription("DynamicControlFieldCommon_ConvertEmptyStringToNull") ] public bool ConvertEmptyStringToNull { get { object o = ViewState["ConvertEmptyStringToNull"]; return (o == null ? false : (bool)o); } set { _customConvertEmptyStringToNullSet = true; ViewState["ConvertEmptyStringToNull"] = value; } } ////// See IFieldFormattingOptions /// [ Category("Behavior"), DefaultValue(false), ResourceDescription("DynamicControlFieldCommon_ApplyFormatInEditMode") ] public bool ApplyFormatInEditMode { get { object o = ViewState["ApplyFormatInEditMode"]; return (o == null ? false : (bool)o); } set { _customApplyFormatInEditModeSet = true; ViewState["ApplyFormatInEditMode"] = value; } } ////// See IFieldFormattingOptions /// [ Category("Data"), DefaultValue(""), ResourceDescription("DynamicControlFieldCommon_DataFormatString") ] public string DataFormatString { get { object o = ViewState["DataFormatString"]; return (o == null ? String.Empty : (string)o); } set { ViewState["DataFormatString"] = value; } } ////// See IFieldFormattingOptions /// [ Category("Behavior"), DefaultValue(true), ResourceDescription("DynamicControlFieldCommon_HtmlEncode") ] public bool HtmlEncode { get { object o = ViewState["HtmlEncode"]; return (o == null ? true : (bool)o); } set { ViewState["HtmlEncode"] = value; } } ////// See IFieldFormattingOptions /// [ Category("Behavior"), DefaultValue(""), ResourceDescription("DynamicControlFieldCommon_NullDisplayText") ] public string NullDisplayText { get { object o = ViewState["NullDisplayText"]; return (o == null ? String.Empty : (string)o); } set { ViewState["NullDisplayText"] = value; } } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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