return dataSource;
}
set {
- ValidateDataSource (value);
+ if(value!=null)
+ ValidateDataSource (value);
dataSource = value;
OnDataPropertyChanged ();
}
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;
}
}
EnsureDataBound ();
base.OnPreRender (e);
}
+
+ internal Control FindDataSource ()
+ {
+ Control ctrl = null;
+ Control namingContainer = NamingContainer;
+
+ while (namingContainer != null) {
+ ctrl = namingContainer.FindControl (DataSourceID);
+ if (ctrl != null)
+ break;
+ namingContainer = namingContainer.NamingContainer;
+ }
+
+ return ctrl;
+ }
protected abstract void PerformSelect ();
#endif
+