//
// System.Web.UI.WebControls.ControlParameter
//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
//
// (C) 2003 Ben Maurer
//
//
// 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.
//
#if NET_2_0
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Text;
using System.ComponentModel;
using System.Reflection;
namespace System.Web.UI.WebControls{
[DefaultPropertyAttribute ("ControlID")]
public class ControlParameter : Parameter {
public ControlParameter () : base ()
{
}
protected ControlParameter (ControlParameter original) : base (original)
{
this.ControlID = original.ControlID;
this.PropertyName = original.PropertyName;
}
public ControlParameter (string name, string controlID) : base (name)
{
ControlID = controlID;
}
public ControlParameter (string name, string controlID, string propertyName) : base (name)
{
ControlID = controlID;
PropertyName = propertyName;
}
public ControlParameter (string name, TypeCode type, string controlID, string propertyName) : base (name, type)
{
ControlID = controlID;
PropertyName = propertyName;
}
public ControlParameter (string name, DbType dbType, string controlID, string propertyName) : base (name, dbType)
{
ControlID = controlID;
PropertyName = propertyName;
}
protected override Parameter Clone ()
{
return new ControlParameter (this);
}
protected override object Evaluate (HttpContext ctx, Control control)
{
if (control == null)
return null;
if (control.Page == null)
return null;
if(String.IsNullOrEmpty(ControlID))
throw new ArgumentException ("The ControlID property is not set.");
Control c = null, namingContainer = control.NamingContainer;
while (namingContainer != null) {
c = namingContainer.FindControl(ControlID);
if (c != null)
break;
namingContainer = namingContainer.NamingContainer;
}
if (c == null)
throw new InvalidOperationException ("Control '" + ControlID + "' not found.");
string propName = PropertyName;
if (String.IsNullOrEmpty (propName)) {
object [] attrs = c.GetType ().GetCustomAttributes (typeof (ControlValuePropertyAttribute), true);
if(attrs.Length==0)
throw new ArgumentException ("The PropertyName property is not set and the Control identified by the ControlID property is not decorated with a ControlValuePropertyAttribute attribute.");
ControlValuePropertyAttribute attr = (ControlValuePropertyAttribute) attrs [0];
propName = attr.Name;
}
return DataBinder.Eval (c, propName);
}
[WebCategoryAttribute ("Control")]
[RefreshPropertiesAttribute (RefreshProperties.All)]
[TypeConverterAttribute (typeof (ControlIDConverter))]
[DefaultValueAttribute ("")]
[IDReferencePropertyAttribute (typeof(System.Web.UI.Control))]
public string ControlID {
get { return ViewState.GetString ("ControlID", ""); }
set {
if (ControlID != value) {
ViewState ["ControlID"] = value;
OnParameterChanged ();
}
}
}
[DefaultValueAttribute ("")]
[TypeConverterAttribute (typeof (ControlPropertyNameConverter))]
[WebCategoryAttribute ("Control")]
public string PropertyName {
get { return ViewState.GetString ("PropertyName", ""); }
set {
if (PropertyName != value) {
ViewState ["PropertyName"] = value;
OnParameterChanged ();
}
}
}
}
}
#endif
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