[bcl] Rename variables to avoid conflict with later renames

[mono.git] / mcs / class / System.Web / System.Web.UI.WebControls / BaseDataBoundControl.cs

diff --git a/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs b/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs
index 7034834321a71bfa882f469cebe185f8c4a19f32..e255f407852cc6333c1cddeea183ceac73cadeae 100644 (file)
--- a/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs
+++ b/mcs/class/System.Web/System.Web.UI.WebControls/BaseDataBoundControl.cs
@@ -4,7 +4,7 @@
 // Authors:
 //     Lluis Sanchez Gual (lluis@novell.com)
 //
-// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
+// Copyright (C) 2004-2010 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
@@ -26,13 +26,12 @@
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
 
-#if NET_2_0
 using System.Collections;
 using System.ComponentModel;
 using System.Security.Permissions;
 
-namespace System.Web.UI.WebControls {
-
+namespace System.Web.UI.WebControls
+{
        // CAS
        [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
        [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
@@ -41,13 +40,19 @@ namespace System.Web.UI.WebControls {
        [DesignerAttribute ("System.Web.UI.Design.WebControls.BaseDataBoundControlDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
        public abstract class BaseDataBoundControl: WebControl
        {
-               public event EventHandler DataBound;
-               
+               static readonly object dataBoundEvent = new object ();
+
+               EventHandlerList events = new EventHandlerList ();
                object dataSource;
                bool initialized;
                bool preRendered;
                bool requiresDataBinding;
                
+               public event EventHandler DataBound {
+                       add { events.AddHandler (dataBoundEvent, value); }
+                       remove { events.RemoveHandler (dataBoundEvent, value); }
+               }
+               
                protected BaseDataBoundControl ()
                {
                }
@@ -64,27 +69,22 @@ namespace System.Web.UI.WebControls {
                [DefaultValueAttribute (null)]
                [DesignerSerializationVisibilityAttribute (DesignerSerializationVisibility.Hidden)]
                public virtual object DataSource {
-                       get {
-                               return dataSource;
-                       }
+                       get { return dataSource; }
                        set {
-                               ValidateDataSource (value);
+                               if(value!=null)
+                                       ValidateDataSource (value);
                                dataSource = value;
-                               if (initialized)
-                                       OnDataPropertyChanged ();
+                               OnDataPropertyChanged ();
                        }
                }
                
                [DefaultValueAttribute ("")]
                [ThemeableAttribute (false)]
                public virtual string DataSourceID {
-                       get {
-                               return ViewState.GetString ("DataSourceID", "");
-                       }
+                       get { return ViewState.GetString ("DataSourceID", String.Empty); }
                        set {
                                ViewState["DataSourceID"] = value;
-                               if (initialized)
-                                       OnDataPropertyChanged ();
+                               OnDataPropertyChanged ();
                        }
                }
                
@@ -98,13 +98,37 @@ namespace System.Web.UI.WebControls {
                
                protected bool RequiresDataBinding {
                        get { return requiresDataBinding; }
-                       set { 
-                               requiresDataBinding = value;
-                               if (value && preRendered && IsBoundUsingDataSourceID && Page != null && !Page.IsCallback)
+                       set {
+                               // MSDN: If you set the RequiresDataBinding
+                               // property to true when the data-bound control
+                               // has already begun to render its output to the
+                               // page, the current HTTP request is not a
+                               // callback, and you are using the DataSourceID
+                               // property to identify the data source control
+                               // to bind to, the DataBind method is called
+                               // immediately. In this case, the
+                               // RequiresDataBinding property is _not_ actually
+                               // set to true.
+                               //
+                               // LAMESPEC, the docs quoted above mention that
+                               // DataBind is called in the described
+                               // case. This is wrong since that way we don't
+                               // break recursion when the property is set from
+                               // within the OnSelect handler in user's
+                               // code. EnsureDataBound makes sure that no
+                               // recursive binding is performed. Also the
+                               // property DOES get set in this case (according
+                               // to tests)
+                               if (value && preRendered && IsBoundUsingDataSourceID && Page != null && !Page.IsCallback) {
+                                       requiresDataBinding = true;
                                        EnsureDataBound ();
+                               } else
+                                       requiresDataBinding = value;
                        }
                }
-               
+               public override bool SupportsDisabledAttribute {
+                       get { return RenderingCompatibilityLessThan40; }
+               }
                protected void ConfirmInitState ()
                {
                        initialized = true;
@@ -112,7 +136,6 @@ namespace System.Web.UI.WebControls {
                
                public override void DataBind ()
                {
-                       RequiresDataBinding = false;
                        PerformSelect ();
                }
 
@@ -124,13 +147,15 @@ namespace System.Web.UI.WebControls {
                
                protected virtual void OnDataBound (EventArgs e)
                {
-                       if (DataBound != null)
-                               DataBound (this, e);
+                       EventHandler eh = events [dataBoundEvent] as EventHandler;
+                       if (eh != null)
+                               eh (this, e);
                }
 
                protected virtual void OnDataPropertyChanged ()
                {
-                       RequiresDataBinding = true;
+                       if (Initialized)
+                               RequiresDataBinding = true;
                }
                
                protected internal override void OnInit (EventArgs e)
@@ -153,6 +178,22 @@ namespace System.Web.UI.WebControls {
                        EnsureDataBound ();
                        base.OnPreRender (e);
                }
+
+               internal Control FindDataSource ()
+               {
+                       Control ctrl;
+                       Control namingContainer = NamingContainer;
+                       string dataSourceID = DataSourceID;
+                       
+                       while (namingContainer != null) {
+                               ctrl = namingContainer.FindControl (dataSourceID);
+                               if (ctrl != null)
+                                       return ctrl;
+                               namingContainer = namingContainer.NamingContainer;
+                       }
+
+                       return null;
+               }
                
                protected abstract void PerformSelect ();
                
@@ -160,6 +201,3 @@ namespace System.Web.UI.WebControls {
                
        }
 }
-
-#endif
-