324 lines
8.5 KiB
C#
324 lines
8.5 KiB
C#
//
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// System.Web.UI.WebControls.CheckBoxList.cs
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//
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// Authors:
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// Jackson Harper (jackson@ximian.com)
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//
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// (C) 2005-2010 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Globalization;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Security.Permissions;
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using System.Web.Util;
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namespace System.Web.UI.WebControls
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{
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// CAS
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[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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[AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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public class CheckBoxList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler
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{
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CheckBox check_box;
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public CheckBoxList ()
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{
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check_box = new CheckBox ();
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Controls.Add (check_box);
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}
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[DefaultValue(-1)]
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[WebSysDescription ("")]
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[WebCategory ("Layout")]
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public virtual int CellPadding {
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get { return TableStyle.CellPadding; }
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set { TableStyle.CellPadding = value; }
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}
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[DefaultValue(-1)]
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[WebSysDescription ("")]
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[WebCategory ("Layout")]
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public virtual int CellSpacing {
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get { return TableStyle.CellSpacing; }
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set { TableStyle.CellSpacing = value; }
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}
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[DefaultValue(0)]
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[WebSysDescription ("")]
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[WebCategory ("Layout")]
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public virtual int RepeatColumns {
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get { return ViewState.GetInt ("RepeatColumns", 0); }
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set {
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if (value < 0)
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throw new ArgumentOutOfRangeException ("value");
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ViewState ["RepeatColumns"] = value;
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}
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}
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[DefaultValue(RepeatDirection.Vertical)]
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[WebSysDescription ("")]
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[WebCategory ("Layout")]
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public virtual RepeatDirection RepeatDirection {
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get { return (RepeatDirection) ViewState.GetInt ("RepeatDirection", (int) RepeatDirection.Vertical); }
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set {
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if (value < RepeatDirection.Horizontal ||
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value > RepeatDirection.Vertical)
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throw new ArgumentOutOfRangeException ("value");
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ViewState ["RepeatDirection"] = value;
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}
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}
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[DefaultValue(RepeatLayout.Table)]
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[WebSysDescription ("")]
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[WebCategory ("Layout")]
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public virtual RepeatLayout RepeatLayout {
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get { return (RepeatLayout) ViewState.GetInt ("RepeatLayout", (int) RepeatLayout.Table); }
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set {
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bool outOfRange;
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outOfRange = value < RepeatLayout.Table || value > RepeatLayout.OrderedList;
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if (outOfRange)
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throw new ArgumentOutOfRangeException ("value");
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ViewState ["RepeatLayout"] = value;
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}
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}
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[DefaultValue(TextAlign.Right)]
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[WebSysDescription ("")]
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[WebCategory ("Appearance")]
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public virtual TextAlign TextAlign {
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get { return (TextAlign) ViewState.GetInt ("TextAlign", (int) TextAlign.Right); }
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set {
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if (value < TextAlign.Left || value > TextAlign.Right)
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throw new ArgumentOutOfRangeException ("value");
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ViewState ["TextAlign"] = value;
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}
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}
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TableStyle TableStyle {
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get { return (TableStyle) ControlStyle; }
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}
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protected override Style CreateControlStyle ()
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{
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return new TableStyle (ViewState);
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}
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protected override Control FindControl (string id, int pathOffset)
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{
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// Always, or in just all my tests?
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return this;
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}
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protected internal override void OnPreRender (EventArgs e)
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{
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base.OnPreRender (e);
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// Register all of the checked controls so we can
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// find out when they are unchecked.
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Page page = Page;
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for (int i = 0; i < Items.Count; i++) {
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if (Items [i].Selected) {
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check_box.ID = i.ToString (Helpers.InvariantCulture);
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if (page != null)
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page.RegisterRequiresPostBack (check_box);
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}
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}
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}
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protected internal override void Render (HtmlTextWriter writer)
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{
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if (Items.Count == 0)
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return;
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RepeatInfo ri = new RepeatInfo ();
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ri.RepeatColumns = RepeatColumns;
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ri.RepeatDirection = RepeatDirection;
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ri.RepeatLayout = RepeatLayout;
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short ti = 0;
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if (TabIndex != 0) {
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check_box.TabIndex = TabIndex;
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ti = TabIndex;
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TabIndex = 0;
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}
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string ak = AccessKey;
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check_box.AccessKey = ak;
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this.AccessKey = null;
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ri.RenderRepeater (writer, this, TableStyle, this);
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if (ti != 0)
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TabIndex = ti;
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this.AccessKey = ak;
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}
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protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
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{
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if (!IsEnabled)
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return false;
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EnsureDataBound ();
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int checkbox = -1;
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try {
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string id = postDataKey.Substring (ClientID.Length + 1);
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if (Char.IsDigit (id [0]))
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checkbox = Int32.Parse (id, Helpers.InvariantCulture);
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} catch {
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return false;
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}
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if (checkbox == -1)
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return false;
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ListItem item = Items [checkbox];
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if (item.Enabled) {
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string val = postCollection [postDataKey];
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bool ischecked = val == "on";
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#if NET_4_0
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if (!RenderingCompatibilityLessThan40) {
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ischecked = val == item.Value;
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}
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#endif
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if (ischecked && !item.Selected) {
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item.Selected = true;
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return true;
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} else if (!ischecked && item.Selected) {
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item.Selected = false;
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return true;
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}
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}
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return false;
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}
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protected virtual void RaisePostDataChangedEvent ()
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{
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if (CausesValidation) {
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Page page = Page;
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if (page != null)
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page.Validate (ValidationGroup);
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}
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OnSelectedIndexChanged (EventArgs.Empty);
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}
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bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
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{
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return LoadPostData (postDataKey, postCollection);
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}
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void IPostBackDataHandler.RaisePostDataChangedEvent ()
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{
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RaisePostDataChangedEvent ();
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}
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protected virtual bool HasFooter {
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get { return false; }
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}
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bool IRepeatInfoUser.HasFooter {
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get { return HasFooter; }
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}
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protected virtual bool HasHeader {
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get { return false; }
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}
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bool IRepeatInfoUser.HasHeader {
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get { return HasHeader; }
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}
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protected virtual bool HasSeparators {
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get { return false; }
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}
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bool IRepeatInfoUser.HasSeparators {
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get { return HasSeparators; }
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}
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protected virtual int RepeatedItemCount {
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get { return Items.Count; }
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}
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int IRepeatInfoUser.RepeatedItemCount {
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get { return RepeatedItemCount; }
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}
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protected virtual Style GetItemStyle (ListItemType itemType, int repeatIndex)
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{
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return null;
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}
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Style IRepeatInfoUser.GetItemStyle (ListItemType itemType, int repeatIndex)
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{
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return GetItemStyle (itemType, repeatIndex);
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}
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protected virtual void RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
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{
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ListItem item = Items [repeatIndex];
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string cssClass = check_box.CssClass;
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if (!String.IsNullOrEmpty (cssClass))
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check_box.CssClass = String.Empty;
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check_box.ID = repeatIndex.ToString (Helpers.InvariantCulture);
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check_box.Text = item.Text;
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check_box.AutoPostBack = AutoPostBack;
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check_box.Checked = item.Selected;
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check_box.TextAlign = TextAlign;
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if (!IsEnabled)
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check_box.Enabled = false;
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else
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check_box.Enabled = item.Enabled;
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check_box.ValidationGroup = ValidationGroup;
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check_box.CausesValidation = CausesValidation;
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if (check_box.HasAttributes)
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check_box.Attributes.Clear ();
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if (item.HasAttributes)
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check_box.Attributes.CopyFrom (item.Attributes);
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if (!RenderingCompatibilityLessThan40) {
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var attrs = check_box.InputAttributes;
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attrs.Clear ();
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attrs.Add ("value", item.Value);
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}
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check_box.RenderControl (writer);
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}
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void IRepeatInfoUser.RenderItem (ListItemType itemType, int repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
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{
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RenderItem (itemType, repeatIndex, repeatInfo, writer);
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}
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internal override bool MultiSelectOk ()
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{
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return true;
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}
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}
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}
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