Merge pull request #757 from mlintner/master
[mono.git] / mcs / class / System.Web / System.Web.UI.WebControls / RequiredFieldValidator.cs
1 //
2 // System.Web.UI.WebControls.RequiredFieldValidator
3 //
4 // Authors:
5 //      Ben Maurer (bmaurer@novell.com)
6 //
7 // (C) 2005 Novell, Inc (http://www.novell.com)
8 //
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
16 // 
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
19 // 
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 //
28
29 using System.ComponentModel;
30 using System.Security.Permissions;
31
32 namespace System.Web.UI.WebControls {
33         // CAS
34         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
35         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
36         // attributes
37         [ToolboxData ("<{0}:RequiredFieldValidator runat=\"server\" ErrorMessage=\"RequiredFieldValidator\"></{0}:RequiredFieldValidator>")]
38         public class RequiredFieldValidator : BaseValidator {
39                 protected override void AddAttributesToRender (HtmlTextWriter w)
40                 {
41                         if (RenderUplevel) {
42                                 RegisterExpandoAttribute (ClientID, "evaluationfunction", "RequiredFieldValidatorEvaluateIsValid");
43                                 RegisterExpandoAttribute (ClientID, "initialvalue", InitialValue, true);
44                         }
45
46                         base.AddAttributesToRender (w);
47                 }
48                 
49                 protected override bool EvaluateIsValid ()
50                 {
51                         return GetControlValidationValue (ControlToValidate) != InitialValue;
52                 }
53                 
54
55                 [Themeable(false)]
56                 [DefaultValue("")]
57                 [WebSysDescription ("")]
58                 [WebCategory ("Behavior")]
59                 public string InitialValue {
60                         get {
61                                 return ViewState.GetString ("InitialValue", "");
62                         }
63                         set {
64                                 ViewState ["InitialValue"] = value;
65                         }
66                 }
67         }
68 }