117 lines
3.7 KiB
C#
117 lines
3.7 KiB
C#
//
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// ExtenderControl.cs
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//
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// Author:
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// Igor Zelmanovich <igorz@mainsoft.com>
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//
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// (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
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//
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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;
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using System.Collections.Generic;
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using System.Text;
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using System.ComponentModel;
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namespace System.Web.UI
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{
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[DefaultProperty ("TargetControlID")]
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[ParseChildren (true)]
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[NonVisualControl]
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[PersistChildren (false)]
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public abstract class ExtenderControl : Control, IExtenderControl
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{
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ScriptManager _scriptManager;
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string _targetControlID;
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protected ExtenderControl () { }
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[DefaultValue ("")]
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[IDReferenceProperty]
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[Category ("Behavior")]
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public string TargetControlID {
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get {
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if (_targetControlID == null)
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return String.Empty;
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return _targetControlID;
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}
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set { _targetControlID = value; }
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}
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[Browsable (false)]
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[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
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[EditorBrowsable (EditorBrowsableState.Never)]
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public override bool Visible {
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get {
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return base.Visible;
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}
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set {
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throw new NotImplementedException ();
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}
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}
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ScriptManager ScriptManager {
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get {
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if (_scriptManager == null) {
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_scriptManager = ScriptManager.GetCurrent (Page);
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if (_scriptManager == null)
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throw new InvalidOperationException (String.Format ("The control with ID '{0}' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.", ID));
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}
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return _scriptManager;
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}
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}
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protected abstract IEnumerable<ScriptDescriptor> GetScriptDescriptors (Control targetControl);
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protected abstract IEnumerable<ScriptReference> GetScriptReferences ();
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protected internal override void OnPreRender (EventArgs e) {
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base.OnPreRender (e);
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if (String.IsNullOrEmpty (TargetControlID))
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throw new InvalidOperationException (String.Format ("The TargetControlID of '{0}' is not valid. The value cannot be null or empty.", ID));
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Control c = FindControl (TargetControlID);
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if (c == null)
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throw new InvalidOperationException (String.Format ("The TargetControlID of '{0}' is not valid. A control with ID '{1}' could not be found.", ID, TargetControlID));
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ScriptManager.RegisterExtenderControl (this, c);
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}
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protected internal override void Render (HtmlTextWriter writer) {
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ScriptManager.RegisterScriptDescriptors (this);
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base.Render (writer);
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}
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#region IExtenderControl Members
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IEnumerable<ScriptDescriptor> IExtenderControl.GetScriptDescriptors (Control targetControl) {
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return GetScriptDescriptors (targetControl);
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}
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IEnumerable<ScriptReference> IExtenderControl.GetScriptReferences () {
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return GetScriptReferences ();
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}
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#endregion
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}
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}
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