97 lines
3.7 KiB
C#
97 lines
3.7 KiB
C#
//
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// System.Web.UI.CollectionBuilder.cs
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// (c) 2003 Ximian, Inc. (http://www.ximian.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;
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using System.Reflection;
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using System.Text;
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namespace System.Web.UI
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{
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sealed class CollectionBuilder : ControlBuilder
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{
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Type[] possibleElementTypes;
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internal CollectionBuilder ()
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{
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}
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public override void AppendLiteralString (string s)
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{
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if (s != null && s.Trim ().Length > 0)
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throw new HttpException ("Literal content not allowed for " + ControlType);
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}
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public override Type GetChildControlType (string tagName, IDictionary attribs)
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{
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Type t = Root.GetChildControlType (tagName, attribs);
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if (possibleElementTypes != null) {
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bool foundMatchingType = false;
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for (int i = 0; i < possibleElementTypes.Length && !foundMatchingType; ++i)
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foundMatchingType = possibleElementTypes[i].IsAssignableFrom (t);
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if (!foundMatchingType) {
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StringBuilder possibleTypesString = new StringBuilder ();
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for (int i = 0; i < possibleElementTypes.Length; i++) {
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if (i != 0)
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possibleTypesString.Append (", ");
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possibleTypesString.Append (possibleElementTypes[i]);
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}
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throw new HttpException ("Cannot add a " + t + " to " + possibleTypesString);
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}
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}
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return t;
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}
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public override void Init (TemplateParser parser,
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ControlBuilder parentBuilder,
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Type type,
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string tagName,
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string id,
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IDictionary attribs)
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{
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base.Init (parser, parentBuilder, type, tagName, id, attribs);
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PropertyInfo prop = parentBuilder.ControlType.GetProperty (tagName, FlagsNoCase);
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SetControlType (prop.PropertyType);
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MemberInfo[] mems = ControlType.GetMember ("Item", MemberTypes.Property, FlagsNoCase & ~BindingFlags.IgnoreCase);
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if (mems.Length > 0) {
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possibleElementTypes = new Type [mems.Length];
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for (int i = 0; i < mems.Length; ++i)
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possibleElementTypes [i] = ((PropertyInfo)mems [i]).PropertyType;
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} else
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throw new HttpException ("Collection of type '" + ControlType + "' does not have an indexer.");
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}
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}
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}
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