datagridcolumncollection.cs

不错的人事管理系统

using System;
using System.Collections;

namespace System.Web.UI.WebControls
{
	/// <summary>
	/// Summary description for DataGridColumnCollection.
	/// </summary>
	public class DataGridColumnCollection : System.Collections.ICollection,
		System.Collections.IEnumerable,

		System.Web.UI.IStateManager
	{
		private System.Web.UI.WebControls.DataGrid owner;
		private System.Collections.ArrayList columns;
		private bool marked;


		public DataGridColumnCollection(DataGrid owner, ArrayList columns) : base() 
		{
			this.owner = owner;
			this.columns = columns;
		}

		public void Add(DataGridColumn column) 
		{
			this.AddAt(-1, column);
		}

		public void AddAt(int index, DataGridColumn column) 
		{
			if (index == -1)
				this.columns.Add(column);
			else
				this.columns.Insert(index, column);
			column.SetOwner(this.owner);
			if (this.marked)
				((System.Web.UI.IStateManager)column).TrackViewState();
			this.OnColumnsChanged();
		}

		public void Clear() 
		{
			this.columns.Clear();
			this.OnColumnsChanged();
		}

		public virtual IEnumerator GetEnumerator() 
		{
			return this.columns.GetEnumerator();
		}

		public int IndexOf(DataGridColumn column) 
		{
			if (column != null)
				return this.columns.IndexOf(column);
			return -1;
		}


		private void OnColumnsChanged() 
		{
			if (this.owner != null)
				this.owner.OnColumnsChanged();
		}

		public void Remove(DataGridColumn column) 
		{
			int local0;

			local0 = this.IndexOf(column);
			if (local0 >= 0)
				this.RemoveAt(local0);
		}

		public void RemoveAt(int index) 
		{
			if (index >= 0 && index < this.Count) 
			{
				this.columns.RemoveAt(index);
				this.OnColumnsChanged();
				return;
			}
			throw new ArgumentOutOfRangeException("index");
		}

		bool System.Web.UI.IStateManager.get_IsTrackingViewState() 
		{
			return this.marked;
		}

		
		void System.Web.UI.IStateManager.LoadViewState(object savedState) 
		{
			object[] local0;
			int local1;

			if (savedState != null) 
			{
				local0 = (object[]) savedState;
				if ((int) local0.Length == this.columns.Count) 
				{
					local1 = 0;
					while (local1 < (int) local0.Length) 
					{
						if (local0[local1] != null)
							((System.Web.UI.IStateManager)this.columns[local1]).LoadViewState(local0[local1]);
						local1++;
					}
				}
			}
		}

		
		object System.Web.UI.IStateManager.SaveViewState() 
		{
			int local0;
			object[] local1;
			bool local2;
			int local3;

			local0 = this.columns.Count;
			local1 = new Object[checked((uint) local0)];
			local2 = false;
			local3 = 0;
			while (local3 < local0) 
			{
				local1[local3] = ((System.Web.UI.IStateManager)this.columns[local3]).SaveViewState();
				if (local1[local3] != null)
					local2 = true;
				local3++;
			}
			if (!(local2))
				return null;
			return local1;
		}

		bool System.Web.UI.IStateManager.IsTrackingViewState
		{
			get
			{
				return this.marked;
			}
		}

		void System.Web.UI.IStateManager.TrackViewState() 
		{
			int local0;
			int local1;

			this.marked = true;
			local0 = this.columns.Count;
			local1 = 0;
			while (local1 < local0) 
			{
				((System.Web.UI.IStateManager)this.columns[local1]).TrackViewState();
				local1++;
			}
		}


		public bool IsReadOnly
		{
			get
			{
				return false;
			}
		}

		public virtual bool IsSynchronized
		{
			get
			{
				return true;
			}
		}




		public virtual void CopyTo(Array array, int index) 
		{
			IEnumerator local0;

			local0 = this.GetEnumerator();
			while (local0.MoveNext()) 
			{
				index = index + 1;
				array.SetValue(local0.Current, index);
			}
		}


		
		public virtual int Count
		{
			get
			{
				return this.columns.Count;
			}
		}

		public DataGridColumn this[int index]
		{
			get
			{
				return (DataGridColumn) this.columns[index];
			}
		}

		public virtual object SyncRoot
		{
			get
			{
				return this;
			}
		}

	}
}