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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tango.PPC.Shared.SQL
{
/// <summary>
/// Represents a <see cref="RemoteSqlDataSet"/> columns collection.
/// </summary>
/// <seealso cref="System.Collections.ObjectModel.Collection{Tango.PPC.Shared.SQL.RemoteSqlColumn}" />
public class RemoteSqlColumnCollection : Collection<RemoteSqlColumn>
{
private Dictionary<String, RemoteSqlColumn> _dictionary;
/// <summary>
/// Initializes a new instance of the <see cref="RemoteSqlColumnCollection"/> class.
/// </summary>
public RemoteSqlColumnCollection()
{
_dictionary = new Dictionary<string, RemoteSqlColumn>();
}
/// <summary>
/// Inserts an element into the <see cref="T:System.Collections.ObjectModel.Collection`1" /> at the specified index.
/// </summary>
/// <param name="index">The zero-based index at which <paramref name="item" /> should be inserted.</param>
/// <param name="item">The object to insert. The value can be null for reference types.</param>
protected override void InsertItem(int index, RemoteSqlColumn item)
{
item.Index = Count;
_dictionary.Add(item.Name, item);
base.InsertItem(index, item);
}
/// <summary>
/// Removes the element at the specified index of the <see cref="T:System.Collections.ObjectModel.Collection`1" />.
/// </summary>
/// <param name="index">The zero-based index of the element to remove.</param>
/// <exception cref="NotSupportedException"></exception>
protected override void RemoveItem(int index)
{
throw new NotSupportedException();
}
/// <summary>
/// Removes all elements from the <see cref="T:System.Collections.ObjectModel.Collection`1" />.
/// </summary>
protected override void ClearItems()
{
_dictionary.Clear();
base.ClearItems();
}
/// <summary>
/// Replaces the element at the specified index.
/// </summary>
/// <param name="index">The zero-based index of the element to replace.</param>
/// <param name="item">The new value for the element at the specified index. The value can be null for reference types.</param>
/// <exception cref="NotSupportedException"></exception>
protected override void SetItem(int index, RemoteSqlColumn item)
{
throw new NotSupportedException();
}
/// <summary>
/// Gets the column index by column name.
/// </summary>
/// <param name="columnName">Column name.</param>
/// <returns></returns>
public int GetIndexOf(String columnName)
{
return _dictionary[columnName].Index;
}
}
}
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