CustomValidator.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » WebControls » C# / CSharp Open Source

// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
//
// Authors:
//  Peter Bartok  (pbartok@novell.com)
//
//

using System.ComponentModel;
using System.Security.Permissions;

namespace System.Web.UI.WebControls{
  // CAS
  [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  // attributes
  [DefaultEvent("ServerValidate")]
#if NET_2_0
  [ToolboxData("<{0}:CustomValidator runat=\"server\" ErrorMessage=\"CustomValidator\"></{0}:CustomValidator>")]
#else
  [ToolboxData("<{0}:CustomValidator runat=server ErrorMessage=\"CustomValidator\"></{0}:CustomValidator>")]
#endif
  public class CustomValidator : BaseValidator {
    static readonly object serverValidateEvent = new object ();

    EventHandlerList events = new EventHandlerList ();
    
    #region Events
    [WebSysDescription ("")]
    [WebCategory ("Behavior")]
      public event ServerValidateEventHandler ServerValidate {
      add { events.AddHandler (serverValidateEvent, value); }
      remove { events.RemoveHandler (serverValidateEvent, value); }
    }
    
    #endregion  // Events

    #region Public Constructors
    public CustomValidator() {
    }
    #endregion  // Public Constructors

    #region Public Instance Properties
    [DefaultValue("")]
    [WebSysDescription ("")]
    [WebCategory ("Behavior")]
#if NET_2_0
    [Themeable (false)]
#endif
    public string ClientValidationFunction {
      get { return ViewState.GetString("ClientValidationFunction", ""); }
      set { ViewState["ClientValidationFunction"] = value; }
    }

#if NET_2_0
    [Themeable (false)]
    [DefaultValue (false)]
    public bool ValidateEmptyText {
      get { return ViewState.GetBool ("ValidateEmptyText", false); }
      set { ViewState ["ValidateEmptyText"] = value; }
    }
#endif
    #endregion  // Public Instance Properties

    #region Public Instance Methods
    protected override void AddAttributesToRender(HtmlTextWriter writer) {
      base.AddAttributesToRender (writer);

      if (base.RenderUplevel) {
        string s;
        
#if NET_2_0
        RegisterExpandoAttribute (ClientID, "evaluationfunction", "CustomValidatorEvaluateIsValid");
        if (ValidateEmptyText)
          RegisterExpandoAttribute (ClientID, "validateemptytext", "true");
        s = ClientValidationFunction;
        if (!String.IsNullOrEmpty (s))
          RegisterExpandoAttribute (ClientID, "clientvalidationfunction", s, true);
#else
        writer.AddAttribute ("evaluationfunction", "CustomValidatorEvaluateIsValid", false);

        s = ClientValidationFunction;
        if (s != String.Empty)
          writer.AddAttribute("clientvalidationfunction", s);
#endif
      }
    }

    protected override bool ControlPropertiesValid ()
    {
      if (ControlToValidate == "")
        return true;
      return base.ControlPropertiesValid ();
    }

    protected override bool EvaluateIsValid() {
      if (ControlToValidate.Length > 0) {
        string value = GetControlValidationValue (ControlToValidate);
#if NET_2_0
        if (String.IsNullOrEmpty (value) && !ValidateEmptyText)
          return true;
#endif
        return OnServerValidate (value);
      }
      return OnServerValidate(string.Empty);
    }

    protected virtual bool OnServerValidate(string value) {
      ServerValidateEventHandler eh = events [serverValidateEvent] as ServerValidateEventHandler;
      if (eh != null) {
        ServerValidateEventArgs  e;

        e = new ServerValidateEventArgs(value, true);
        eh (this, e);
        return e.IsValid;
      }
      return true;
    }
    #endregion  // Public Instance Methods
  }
}