string.cs

这个是基于SMPP的开发源码

using System;
using System.Collections.Generic;

namespace SMPP.Variable
{
	/// <summary>
	/// 定长字符串类型
	/// </summary>
	public class String : Binary
	{
		/// <summary>
		/// 编码类型字段索引
		/// </summary>
		private int EncodingFieldIndex = -1;

		private System.Text.Encoding Encoding = System.Text.Encoding.ASCII;

		/// <summary>
		/// 字符串值
		/// </summary>
		public new string Value
		{
			get
			{
				System.Text.Encoding Encoder = EncodingFieldIndex == -1 ? this.Encoding : (Owner[EncodingFieldIndex] as Encoding).Encoder;
				int len = Array.IndexOf(_Value, (byte)0);
				return Encoder.GetString(_Value, 0, len == -1 ? _Value.Length : len);
			}
			set
			{
				System.Text.Encoding Encoder = EncodingFieldIndex == -1 ? this.Encoding : (Owner[EncodingFieldIndex] as Encoding).Encoder;
				base.Value = Encoder.GetBytes(value);
			}
		}

		/// <summary>
		/// 创建定长字符串实例
		/// </summary>
		/// <param name="Length">长度</param>
		/// <param name="EncodingFieldIndex">编码器字段索引</param>
		public String(int Length, int EncodingFieldIndex)
			: base(Length)
		{
			this.EncodingFieldIndex = EncodingFieldIndex;
		}

		/// <summary>
		/// 创建定长字符串实例
		/// </summary>
		/// <param name="Length">长度</param>
		public String(int Length)
			: base(Length)
		{
			this.EncodingFieldIndex = -1;
		}

		/// <summary>
		/// 创建定长字符串实例
		/// </summary>
		/// <param name="Length">长度</param>
		/// <param name="Encoding">编码器类型</param>
		public String(int Length, System.Text.Encoding Encoding)
			: base(Length)
		{
			this.EncodingFieldIndex = -1;
			this.Encoding = Encoding;
		}
	}
}