2 // System.Web.UI.WebControls.QueryStringParameter
5 // Ben Maurer (bmaurer@users.sourceforge.net)
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.Collections;
33 using System.Collections.Specialized;
36 using System.ComponentModel;
38 namespace System.Web.UI.WebControls {
40 [DefaultPropertyAttribute ("QueryStringField")]
41 public class QueryStringParameter : Parameter {
43 public QueryStringParameter () : base ()
47 protected QueryStringParameter (QueryStringParameter original) : base (original)
49 this.QueryStringField = original.QueryStringField;
53 public QueryStringParameter (string name, string queryStringField) : base (name)
55 QueryStringField = queryStringField;
58 public QueryStringParameter (string name, TypeCode type, string queryStringField) : base (name, type)
60 QueryStringField = queryStringField;
63 public QueryStringParameter (string name, DbType dbType, string queryStringField) : base (name, dbType)
65 QueryStringField = queryStringField;
68 protected override Parameter Clone ()
70 return new QueryStringParameter (this);
77 override object Evaluate (HttpContext ctx, Control control)
79 if (ctx == null || ctx.Request == null)
82 return ctx.Request.QueryString [QueryStringField];
85 [DefaultValueAttribute ("")]
86 public string QueryStringField {
88 string s = ViewState ["QueryStringField"] as string;
95 if (QueryStringField != value) {
96 ViewState ["QueryStringField"] = value;
97 OnParameterChanged ();