Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / WebControls / RadioButtonList.cs / 1477082 / RadioButtonList.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections.Specialized; using System.ComponentModel; using System.Globalization; using System.Web; using System.Web.UI; using System.Web.Util; ////// [ ValidationProperty("SelectedItem"), SupportsEventValidation, ] public class RadioButtonList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler { RadioButton _controlToRepeat; private bool _cachedIsEnabled; private bool _cachedRegisterEnabled; private int _offset; public RadioButtonList() { _offset = 0; } ///Generates a single-selection radio button group and /// defines its properties. ////// CellPadding property. /// The padding between each item. /// [ WebCategory("Layout"), DefaultValue(-1), WebSysDescription(SR.RadioButtonList_CellPadding) ] public virtual int CellPadding { get { if (ControlStyleCreated == false) { return -1; } return ((TableStyle)ControlStyle).CellPadding; } set { ((TableStyle)ControlStyle).CellPadding = value; } } ////// CellSpacing property. /// The spacing between each item. /// [ WebCategory("Layout"), DefaultValue(-1), WebSysDescription(SR.RadioButtonList_CellSpacing) ] public virtual int CellSpacing { get { if (ControlStyleCreated == false) { return -1; } return ((TableStyle)ControlStyle).CellSpacing; } set { ((TableStyle)ControlStyle).CellSpacing = value; } } private RadioButton ControlToRepeat { get { if (_controlToRepeat != null) return _controlToRepeat; _controlToRepeat = new RadioButton(); _controlToRepeat.EnableViewState = false; Controls.Add(_controlToRepeat); // A note is that we don't need to set the GroupName on the radio // button as the radio button would simply use its naming container // (which would be this control) as its name attribute for postback. // Apply properties that are the same for each radio button _controlToRepeat.AutoPostBack = AutoPostBack; _controlToRepeat.CausesValidation = CausesValidation; _controlToRepeat.ValidationGroup = ValidationGroup; return _controlToRepeat; } } ////// Indicates the column count of radio buttons /// within the group. /// [ WebCategory("Layout"), DefaultValue(0), WebSysDescription(SR.RadioButtonList_RepeatColumns) ] public virtual int RepeatColumns { get { object o = ViewState["RepeatColumns"]; return((o == null) ? 0 : (int)o); } set { if (value < 0) { throw new ArgumentOutOfRangeException("value"); } ViewState["RepeatColumns"] = value; } } ////// [ WebCategory("Layout"), DefaultValue(RepeatDirection.Vertical), WebSysDescription(SR.Item_RepeatDirection) ] public virtual RepeatDirection RepeatDirection { get { object o = ViewState["RepeatDirection"]; return((o == null) ? RepeatDirection.Vertical : (RepeatDirection)o); } set { if (value < RepeatDirection.Horizontal || value > RepeatDirection.Vertical) { throw new ArgumentOutOfRangeException("value"); } ViewState["RepeatDirection"] = value; } } ///Gets or sets the direction of flow of /// the radio buttons within the group. ////// [ WebCategory("Layout"), DefaultValue(RepeatLayout.Table), WebSysDescription(SR.WebControl_RepeatLayout) ] public virtual RepeatLayout RepeatLayout { get { object o = ViewState["RepeatLayout"]; return((o == null) ? RepeatLayout.Table : (RepeatLayout)o); } set { EnumerationRangeValidationUtil.ValidateRepeatLayout(value); ViewState["RepeatLayout"] = value; } } ///Indicates the layout of radio buttons within the /// group. ////// [ WebCategory("Appearance"), DefaultValue(TextAlign.Right), WebSysDescription(SR.WebControl_TextAlign) ] public virtual TextAlign TextAlign { get { object align = ViewState["TextAlign"]; return((align == null) ? TextAlign.Right : (TextAlign)align); } set { if (value < TextAlign.Left || value > TextAlign.Right) { throw new ArgumentOutOfRangeException("value"); } ViewState["TextAlign"] = value; } } ////// Indicates the label text alignment for the radio buttons within the group. ////// /// protected override Style CreateControlStyle() { return new TableStyle(ViewState); } ////// /// protected override Control FindControl(string id, int pathOffset) { return this; } ///Catches auto postback from a ///in the list. /// /// bool IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) { return LoadPostData(postDataKey, postCollection); } ///Loads the posted content of the list control if it is different from the last /// posting. ////// /// protected virtual bool LoadPostData(String postDataKey, NameValueCollection postCollection) { // When a RadioButtonList is disabled, then there is no postback data for it. // Since RadioButtonList doesn't call RegisterRequiresPostBack, this method will // never be called, so we don't need to worry about ignoring empty postback data. string post = postCollection[postDataKey]; int currentSelectedIndex = SelectedIndex; EnsureDataBound(); int n = Items.Count; for (int i=0; i < n; i++) { if (post == Items[i].Value && Items[i].Enabled) { ValidateEvent(postDataKey, post); if (i != currentSelectedIndex) { SetPostDataSelection(i); return true; } return false; } } return false; } ///Loads the posted content of the list control if it is different from the last /// posting. ////// /// void IPostBackDataHandler.RaisePostDataChangedEvent() { RaisePostDataChangedEvent(); } ///Invokes the OnSelectedIndexChanged /// method whenever posted data for the ////// control has changed. /// /// protected virtual void RaisePostDataChangedEvent() { if (AutoPostBack && Page != null && !Page.IsPostBackEventControlRegistered) { // VSWhidbey 204824 Page.AutoPostBackControl = this; if (CausesValidation) { Page.Validate(ValidationGroup); } } OnSelectedIndexChanged(EventArgs.Empty); } protected internal override void Render(HtmlTextWriter writer) { if (Items.Count == 0 && !EnableLegacyRendering) { return; } RepeatInfo repeatInfo = new RepeatInfo(); Style style = (ControlStyleCreated ? ControlStyle : null); short tabIndex = TabIndex; bool undirtyTabIndex = false; // TabIndex here is special... it needs to be applied to the individual // radiobuttons and not the outer control itself // cache away the TabIndex property state ControlToRepeat.TabIndex = tabIndex; if (tabIndex != 0) { if (ViewState.IsItemDirty("TabIndex") == false) { undirtyTabIndex = true; } TabIndex = 0; } repeatInfo.RepeatColumns = RepeatColumns; repeatInfo.RepeatDirection = RepeatDirection; // If the device does not support tables, use the flow layout to render if (!DesignMode && !Context.Request.Browser.Tables) { repeatInfo.RepeatLayout = RepeatLayout.Flow; } else { repeatInfo.RepeatLayout = RepeatLayout; } if (repeatInfo.RepeatLayout == RepeatLayout.Flow) { repeatInfo.EnableLegacyRendering = EnableLegacyRendering; } repeatInfo.RenderRepeater(writer, (IRepeatInfoUser)this, style, this); if (Page != null) { Page.ClientScript.RegisterForEventValidation(UniqueID); } // restore the state of the TabIndex property if (tabIndex != 0) { TabIndex = tabIndex; } if (undirtyTabIndex) { ViewState.SetItemDirty("TabIndex", false); } } ///Invokes the OnSelectedIndexChanged /// method whenever posted data for the ////// control has changed. /// /// bool IRepeatInfoUser.HasFooter { get { return HasFooter; } } ////// /// protected virtual bool HasFooter { get { return false; } } ////// /// bool IRepeatInfoUser.HasHeader { get { return HasHeader; } } ////// /// protected virtual bool HasHeader { get { return false; } } ////// /// bool IRepeatInfoUser.HasSeparators { get { return HasSeparators; } } ////// /// protected virtual bool HasSeparators { get { return false; } } ////// /// int IRepeatInfoUser.RepeatedItemCount { get { return RepeatedItemCount; } } ////// /// protected virtual int RepeatedItemCount { get { return (Items != null) ? Items.Count : 0; } } ////// /// Style IRepeatInfoUser.GetItemStyle(ListItemType itemType, int repeatIndex) { return GetItemStyle(itemType, repeatIndex); } ////// /// protected virtual Style GetItemStyle(ListItemType itemType, int repeatIndex) { return null; } ////// /// Called by the RepeatInfo helper to render each item /// void IRepeatInfoUser.RenderItem(ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer) { RenderItem(itemType, repeatIndex, repeatInfo, writer); } ////// /// Called by the RepeatInfo helper to render each item /// protected virtual void RenderItem(ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer) { if (repeatIndex == 0) { _cachedIsEnabled = IsEnabled; _cachedRegisterEnabled = (Page != null) && (SaveSelectedIndicesViewState == false); } RadioButton controlToRepeat = ControlToRepeat; // Apply properties of the list items int repeatIndexOffset = repeatIndex + _offset; ListItem item = Items[repeatIndexOffset]; // VSWhidbey 153920 Render expando attributes. controlToRepeat.Attributes.Clear(); if (item.HasAttributes) { foreach (string key in item.Attributes.Keys) { controlToRepeat.Attributes[key] = item.Attributes[key]; } } // Dev10 684108: reset the CssClass for each item. if (!string.IsNullOrEmpty(controlToRepeat.CssClass)) { controlToRepeat.CssClass = ""; } SetControlToRepeatID(this, controlToRepeat, repeatIndexOffset); controlToRepeat.Text = item.Text; controlToRepeat.Attributes["value"] = item.Value; controlToRepeat.Checked = item.Selected; controlToRepeat.Enabled = _cachedIsEnabled && item.Enabled; controlToRepeat.TextAlign = TextAlign; controlToRepeat.RenderControl(writer); if (controlToRepeat.Enabled && _cachedRegisterEnabled && Page != null) { // Store a client-side array of enabled control, so we can re-enable them on // postback (in case they are disabled client-side) // Postback is needed when SelectedIndices is not saved in view state Page.RegisterEnabledControl(controlToRepeat); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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