//
// System.Web.UI.WebControls.LinkButton.cs
//
// Authors:
// Ben Maurer (bmaurer@novell.com)
//
// (C) 2005 Novell, Inc (http://www.novell.com)
//
// 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.Security.Permissions;
namespace System.Web.UI.WebControls{
// CAS
[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
// attributes
[ControlBuilder(typeof(LinkButtonControlBuilder))]
[DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, " + Consts.AssemblySystem_Design)]
[DefaultEvent("Click")]
[DefaultProperty("Text")]
[Designer("System.Web.UI.Design.WebControls.LinkButtonDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
[ParseChildren(false)]
#if NET_2_0
[SupportsEventValidation]
[ToolboxData("<{0}:LinkButton runat=\"server\">LinkButton</{0}:LinkButton>")]
#else
[ToolboxData("<{0}:LinkButton runat=server>LinkButton</{0}:LinkButton>")]
#endif
public class LinkButton : WebControl, IPostBackEventHandler
#if NET_2_0
, IButtonControl
#endif
{
public LinkButton () : base (HtmlTextWriterTag.A)
{
}
protected override void AddAttributesToRender (HtmlTextWriter w)
{
if (Page != null)
Page.VerifyRenderingInServerForm (this);
#if NET_2_0
string onclick = OnClientClick;
onclick = ClientScriptManager.EnsureEndsWithSemicolon (onclick);
if (HasAttributes && Attributes ["onclick"] != null) {
onclick = ClientScriptManager.EnsureEndsWithSemicolon (onclick + Attributes ["onclick"]);
Attributes.Remove ("onclick");
}
if (onclick.Length > 0)
w.AddAttribute (HtmlTextWriterAttribute.Onclick, onclick);
if (Enabled && Page != null) {
PostBackOptions options = GetPostBackOptions ();
string href = Page.ClientScript.GetPostBackEventReference (options, true);
w.AddAttribute (HtmlTextWriterAttribute.Href, href);
}
base.AddAttributesToRender (w);
AddDisplayStyleAttribute (w);
#else
base.AddAttributesToRender (w);
if (Page == null || !Enabled)
return;
if (CausesValidation && Page.AreValidatorsUplevel ()) {
ClientScriptManager csm = new ClientScriptManager (Page);
w.AddAttribute (HtmlTextWriterAttribute.Href,
String.Concat ("javascript:{if (typeof(Page_ClientValidate) == 'function') Page_ClientValidate(); ",
csm.GetPostBackEventReference (this, String.Empty), ";}"));
} else {
w.AddAttribute (HtmlTextWriterAttribute.Href, Page.ClientScript.GetPostBackClientHyperlink (this, ""));
}
#endif
}
#if NET_2_0
protected virtual
#endif
void RaisePostBackEvent (string eventArgument)
{
#if NET_2_0
ValidateEvent (UniqueID, eventArgument);
#endif
if (CausesValidation)
#if NET_2_0
Page.Validate (ValidationGroup);
#else
Page.Validate ();
#endif
OnClick (EventArgs.Empty);
OnCommand (new CommandEventArgs (CommandName, CommandArgument));
}
void IPostBackEventHandler.RaisePostBackEvent (string ea)
{
RaisePostBackEvent (ea);
}
protected override void AddParsedSubObject (object obj)
{
if (HasControls ()) {
base.AddParsedSubObject (obj);
return;
}
LiteralControl lc = obj as LiteralControl;
if (lc == null) {
string s = Text;
if (s.Length != 0) {
Text = null;
Controls.Add (new LiteralControl (s));
}
base.AddParsedSubObject (obj);
} else {
Text = lc.Text;
}
}
#if NET_2_0
protected virtual PostBackOptions GetPostBackOptions ()
{
PostBackOptions options = new PostBackOptions (this);
options.ActionUrl = (PostBackUrl.Length > 0 ?
#if TARGET_J2EE
CreateActionUrl (PostBackUrl)
#else
Page.ResolveClientUrl (PostBackUrl)
#endif
: null);
options.ValidationGroup = null;
options.Argument = String.Empty;
options.ClientSubmit = true;
options.RequiresJavaScriptProtocol = true;
options.PerformValidation = CausesValidation && Page != null && Page.AreValidatorsUplevel (ValidationGroup);
if (options.PerformValidation)
options.ValidationGroup = ValidationGroup;
return options;
}
#endif
protected override void LoadViewState (object savedState)
{
base.LoadViewState (savedState);
// Make sure we clear child controls when this happens
if (ViewState ["Text"] != null)
Text = (string) ViewState ["Text"];
}
[MonoTODO ("Why override?")]
#if NET_2_0
protected internal
#else
protected
#endif
override void OnPreRender (EventArgs e)
{
base.OnPreRender (e);
}
#if NET_2_0
protected internal
#else
protected
#endif
override void RenderContents (HtmlTextWriter writer)
{
if (HasControls () || HasRenderMethodDelegate ())
base.RenderContents (writer);
else
writer.Write (Text);
}
#if ONLY_1_1
[Bindable(false)]
#endif
[DefaultValue(true)]
[WebSysDescription ("")]
[WebCategory ("Behavior")]
#if NET_2_0
[Themeable (false)]
public virtual
#else
public
#endif
bool CausesValidation {
get {
return ViewState.GetBool ("CausesValidation", true);
}
set {
ViewState ["CausesValidation"] = value;
}
}
[Bindable(true)]
[DefaultValue("")]
[WebSysDescription ("")]
[WebCategory ("Behavior")]
#if NET_2_0
[Themeable (false)]
#endif
public string CommandArgument {
get {
return ViewState.GetString ("CommandArgument", "");
}
set {
ViewState ["CommandArgument"] = value;
}
}
[DefaultValue("")]
[WebSysDescription ("")]
[WebCategory ("Behavior")]
#if NET_2_0
[Themeable (false)]
#endif
public string CommandName {
get {
return ViewState.GetString ("CommandName", "");
}
set {
ViewState ["CommandName"] = value;
}
}
#if NET_2_0
[DefaultValue ("")]
[Themeable (false)]
[WebSysDescription ("")]
[WebCategoryAttribute ("Behavior")]
public virtual string OnClientClick
{
get {
return ViewState.GetString ("OnClientClick", "");
}
set {
ViewState ["OnClientClick"] = value;
}
}
#endif
[Bindable(true)]
[DefaultValue("")]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
#if NET_2_0
[Localizable (true)]
#endif
[WebSysDescription ("")]
[WebCategory ("Appearance")]
public virtual string Text {
get {
return ViewState.GetString ("Text", "");
}
set {
ViewState ["Text"] = value;
if (HasControls ())
Controls.Clear ();
}
}
protected virtual void OnClick (EventArgs e)
{
EventHandler h = (EventHandler) Events [ClickEvent];
if (h != null)
h (this, e);
}
static readonly object ClickEvent = new object ();
[WebSysDescription ("")]
[WebCategory ("Action")]
public event EventHandler Click {
add { Events.AddHandler (ClickEvent, value); }
remove { Events.RemoveHandler (ClickEvent, value); }
}
protected virtual void OnCommand (CommandEventArgs e)
{
CommandEventHandler h = (CommandEventHandler) Events [CommandEvent];
if (h != null)
h (this, e);
RaiseBubbleEvent (this, e);
}
static readonly object CommandEvent = new object ();
[WebSysDescription ("")]
[WebCategory ("Action")]
public event CommandEventHandler Command {
add { Events.AddHandler (CommandEvent, value); }
remove { Events.RemoveHandler (CommandEvent, value); }
}
#if NET_2_0
[Editor ("System.Web.UI.Design.UrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
[Themeable (false)]
[UrlProperty ("*.aspx")]
[DefaultValue ("")]
public virtual string PostBackUrl {
get {
return ViewState.GetString ("PostBackUrl", String.Empty);
}
set {
ViewState["PostBackUrl"] = value;
}
}
[DefaultValue ("")]
[Themeable (false)]
[WebSysDescription ("")]
[WebCategoryAttribute ("Behavior")]
public virtual string ValidationGroup {
get {
return ViewState.GetString ("ValidationGroup", "");
}
set {
ViewState ["ValidationGroup"] = value;
}
}
#endif
}
}
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