checkboxtemplate.cs

SharpNuke源代码

using System;
using System.Collections;
using System.Data;
using System.Drawing;
using System.Web.UI;
using System.Web.UI.WebControls;

//
// DotNetNuke -  http://www.dotnetnuke.com
// Copyright (c) 2002-2005
// by Shaun Walker ( [e-mail] ) of Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// 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.
//

namespace DotNetNuke.Security.Permissions.Controls
{
	public class CheckBoxTemplate : ITemplate
	{
		//----------------------------------------------------------------------------
		// The internal storage for which DataField we are going to represent.
		//----------------------------------------------------------------------------
		private string dataField;
		//----------------------------------------------------------------------------
		// The internal storage for the AutoPostback flag.
		//----------------------------------------------------------------------------
		private bool autoPostBack;
		//----------------------------------------------------------------------------
		// Internal storage for the readOnly flag.
		//----------------------------------------------------------------------------
		private bool readOnly;
		//----------------------------------------------------------------------------
		// Internal storage for value mapping - bind checkbox to non-boolean fields
		//----------------------------------------------------------------------------
		private string trueValue;
		//----------------------------------------------------------------------------
		// Our CheckChanged event
		//----------------------------------------------------------------------------
		private CheckChangedEventHandler boxCheckedChangedEvent;
		
		public event CheckChangedEventHandler BoxCheckedChanged
		{
			add { this.boxCheckedChangedEvent += value;	}
			remove { this.boxCheckedChangedEvent -= value; }
		}
		
		//----------------------------------------------------------------------------
		// The CheckBoxTemplate constructor
		//----------------------------------------------------------------------------
		public CheckBoxTemplate(bool editable) 
		{
			this.autoPostBack = false;			
			this.readOnly = !editable;
		}
		
		public CheckBoxTemplate(bool editable, string trueValue) : this(editable)
		{
			this.trueValue = trueValue;
		}
		//----------------------------------------------------------------------------
		// Instantiates the CheckBox that we wish to represent in this column.
		//----------------------------------------------------------------------------
		public void InstantiateIn (Control container)
		{
			CheckBox box = new CheckBox();
			box.DataBinding += new System.EventHandler(BindData);
			box.AutoPostBack = this.autoPostBack;
			box.CheckedChanged += new System.EventHandler(OnCheckChanged);
			container.Controls.Add(box);
		} //InstantiateIn
		
		//----------------------------------------------------------------------------
		// This is a common handler for all the Checkboxes.
		//----------------------------------------------------------------------------
		public void OnCheckChanged (object sender, EventArgs e)
		{
			CheckBox box = ((CheckBox) sender);
			DataGridItem container = ((DataGridItem) box.NamingContainer);
			int gridIndex = container.ItemIndex;
			
			if (this.boxCheckedChangedEvent != null)
				this.boxCheckedChangedEvent(gridIndex, box.Checked);
		}
		
		//----------------------------------------------------------------------------
		// Used to set the DataField that we wish to represent with this CheckBox.
		//----------------------------------------------------------------------------
		public string DataField
		{
			get { return this.dataField; }
			set { this.dataField = value; }
		}
		
		//----------------------------------------------------------------------------
		// Set the AutoPostBack flag. If this is true then each time a CheckBox is clicked
		// in the Column that contains this item then an event is raised on the server.
		//----------------------------------------------------------------------------
		public bool AutoPostBack
		{
			get { return this.autoPostBack; }
			set { this.autoPostBack = value; }
		}
		
		//----------------------------------------------------------------------------
		// Handler for the DataBinding event where we bind the data for a specific row
		// to the CheckBox.
		//----------------------------------------------------------------------------
		private void BindData (object sender, EventArgs e)
		{
			CheckBox box = ((CheckBox) sender);
			DataGridItem container = ((DataGridItem) box.NamingContainer);
			
			string data = ((DataRowView) container.DataItem)[dataField].ToString();
			this.readOnly = data.EndsWith("N");

			box.Checked =  (data.StartsWith("True") || data.EndsWith("N"));
			
			box.Enabled = ! this.readOnly;
			box.ID = data;
		}
		
	}
	
}