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//
// System.Web.UI.HtmlControls.HtmlInputButton.cs
//
// Authors:
// Jackson Harper (jackson@ximian.com)
//
// (C) 2005-2010 Novell, Inc.
//
// 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.
//
using System.ComponentModel;
using System.Globalization;
using System.Reflection;
using System.Security.Permissions;
using System.Web.Util;
namespace System.Web.UI.HtmlControls {
// CAS
[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
// attributes
[DefaultEventAttribute ("ServerClick")]
[SupportsEventValidation]
public class HtmlInputButton : HtmlInputControl, IPostBackEventHandler
{
static readonly object ServerClickEvent = new object();
public HtmlInputButton () : this ("button")
{
}
public HtmlInputButton (string type) : base (type)
{
}
[DefaultValue(true)]
[WebSysDescription("")]
[WebCategory("Behavior")]
public virtual bool CausesValidation {
get {
string flag = Attributes["CausesValidation"];
if (flag == null)
return true;
return Boolean.Parse (flag);
}
set {
Attributes ["CausesValidation"] = value.ToString();
}
}
[DefaultValue ("")]
public virtual string ValidationGroup
{
get {
string group = Attributes["ValidationGroup"];
if (group == null)
return "";
return group;
}
set {
if (value == null)
Attributes.Remove ("ValidationGroup");
else
Attributes["ValidationGroup"] = value;
}
}
void RaisePostBackEventInternal (string eventArgument)
{
ValidateEvent (UniqueID, eventArgument);
if (CausesValidation)
Page.Validate (ValidationGroup);
if (String.Compare (Type, "reset", true, Helpers.InvariantCulture) != 0)
OnServerClick (EventArgs.Empty);
else
ResetForm (FindForm ());
}
HtmlForm FindForm ()
{
Page p = Page;
if (p != null)
return p.Form;
return null;
}
void ResetForm (HtmlForm form)
{
if (form == null || !form.HasControls ())
return;
ResetChildrenValues (form.Controls);
}
void ResetChildrenValues (ControlCollection children)
{
foreach (Control child in children) {
if (child == null)
continue;
if (child.HasControls ())
ResetChildrenValues (child.Controls);
ResetChildValue (child);
}
}
void ResetChildValue (Control child)
{
Type type = child.GetType ();
object[] attributes = type.GetCustomAttributes (false);
if (attributes == null || attributes.Length == 0)
return;
string defaultProperty = null;
DefaultPropertyAttribute defprop;
foreach (object attr in attributes) {
defprop = attr as DefaultPropertyAttribute;
if (defprop == null)
continue;
defaultProperty = defprop.Name;
break;
}
if (defaultProperty == null || defaultProperty.Length == 0)
return;
PropertyInfo pi = null;
try {
pi = type.GetProperty (defaultProperty,
BindingFlags.Instance |
BindingFlags.Public |
BindingFlags.Static |
BindingFlags.IgnoreCase);
} catch (Exception) {
// ignore
}
if (pi == null || !pi.CanWrite)
return;
attributes = pi.GetCustomAttributes (false);
if (attributes == null || attributes.Length == 0)
return;
DefaultValueAttribute defval = null;
object value = null;
foreach (object attr in attributes) {
defval = attr as DefaultValueAttribute;
if (defval == null)
continue;
value = defval.Value;
break;
}
if (value == null || pi.PropertyType != value.GetType ())
return;
try {
pi.SetValue (child, value, null);
} catch (Exception) {
// ignore
}
}
protected virtual void RaisePostBackEvent (string eventArgument)
{
RaisePostBackEventInternal (eventArgument);
}
void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
{
RaisePostBackEvent (eventArgument);
}
protected internal override void OnPreRender (EventArgs e)
{
base.OnPreRender (e);
if (Events [ServerClickEvent] != null)
Page.RequiresPostBackScript ();
}
protected virtual void OnServerClick (EventArgs e)
{
EventHandler server_click = (EventHandler) Events [ServerClickEvent];
if (server_click != null)
server_click (this, e);
}
protected override void RenderAttributes (HtmlTextWriter writer)
{
CultureInfo inv = Helpers.InvariantCulture;
string input_type = Type;
if (0 != String.Compare (input_type, "reset", true, inv) &&
((0 == String.Compare (input_type, "submit", true, inv)) ||
(0 == String.Compare (input_type, "button", true, inv) && Events [ServerClickEvent] != null))) {
string onclick = String.Empty;
if (Attributes ["onclick"] != null) {
onclick = ClientScriptManager.EnsureEndsWithSemicolon (Attributes ["onclick"] + onclick);
Attributes.Remove ("onclick");
}
Page page = Page;
if (page != null) {
PostBackOptions options = GetPostBackOptions ();
onclick += page.ClientScript.GetPostBackEventReference (options, true);
}
if (onclick.Length > 0) {
bool encode = true;
if (Events [ServerClickEvent] != null)
encode = false; // tests show that this is indeed
// the case...
writer.WriteAttribute ("onclick", onclick, encode);
writer.WriteAttribute ("language", "javascript");
}
}
Attributes.Remove ("CausesValidation");
// LAMESPEC: MS doesn't actually remove this
//attribute. it shows up in the rendered
//output.
// Attributes.Remove("ValidationGroup");
base.RenderAttributes (writer);
}
PostBackOptions GetPostBackOptions ()
{
Page page = Page;
PostBackOptions options = new PostBackOptions (this);
options.ValidationGroup = null;
options.ActionUrl = null;
options.Argument = String.Empty;
options.RequiresJavaScriptProtocol = false;
options.ClientSubmit = (0 != String.Compare (Type, "submit", true, Helpers.InvariantCulture));
options.PerformValidation = CausesValidation && page != null && page.Validators.Count > 0;
if (options.PerformValidation)
options.ValidationGroup = ValidationGroup;
return options;
}
[WebSysDescription("")]
[WebCategory("Action")]
public event EventHandler ServerClick {
add { Events.AddHandler (ServerClickEvent, value); }
remove { Events.RemoveHandler (ServerClickEvent, value); }
}
}
}
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