using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Drawing;
namespace Ims.Bll { /// <summary> /// stream 、 string 、byte[] 间的转换扩展方法类 /// </summary> public static class StreamExtend { #region Stream 扩展 /// <summary> /// Stream Stream 转换为 byte 数组 /// </summary> /// <returns></returns> public static byte[] ToByteArray(this Stream stream) { byte[] bytes = new byte[stream.Length]; stream.Read(bytes, 0, bytes.Length); // 设置当前流的位置为流的开始 stream.Seek(0, SeekOrigin.Begin); return bytes; } /// <summary> /// Stream 转换为 image 图片 /// </summary> /// <returns></returns> public static Image ToImage(this Stream stream) { Image img = new Bitmap(stream); return img; } /// <summary> /// Stream 转换为 string ,使用 Encoding.Default 编码 /// </summary> /// <returns></returns> public static string ToStr(this Stream stream) { return System.Text.Encoding.Default.GetString(stream.ToByteArray()); } #endregion
#region byte[] 扩展 /// <summary> /// byte[] 转换为 stream 流 /// </summary> /// <returns></returns> public static Stream ToStream(this byte[] arr) { Stream stream = new MemoryStream(arr); // 设置当前流的位置为流的开始 stream.Seek(0, SeekOrigin.Begin); return stream; } /// <summary> /// byte[] 转换为 Image /// </summary> /// <returns></returns> public static Image ToImage(this byte[] arr) { return Image.FromStream(arr.ToStream()); } /// <summary> /// 转换为 string，使用 Encoding.Default 编码 /// </summary> /// <returns></returns> public static string ToStr(this byte[] arr) { return System.Text.Encoding.Default.GetString(arr); } #endregion
#region string 扩展 /// <summary> /// string 转换为 byte[] /// </summary> /// <returns></returns> public static byte[] ToByteArray(this string str) { return System.Text.Encoding.Default.GetBytes(str); } /// <summary> /// string 转换为 Stream /// </summary> /// <returns></returns> public static Stream ToStream(this string str) { Stream stream = new MemoryStream(str.ToByteArray()); // 设置当前流的位置为流的开始 stream.Seek(0, SeekOrigin.Begin); return stream; } #endregion } }
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//测试代码
int sourceLength = 0; //数据源长度 long byteArrLength = 0; //byte[] 的长度 long streamLength = 0; //Stream 的长度 // char 类型 char c = 'A'; byte[] byteArr_c = c.ToString().ToByteArray(); Stream sm_c = c.ToString().ToStream(); sourceLength = 1; byteArrLength = byteArr_c.Length; streamLength = sm_c.Length;
//string 类型 string str = "ABCDEF"; byte[] byteArr_str = str.ToByteArray(); Stream sm_str = str.ToStream(); sourceLength = str.Length; byteArrLength = byteArr_str.Length; streamLength = sm_str.Length;
//汉字 string cn = "好"; byte[] byteArr_cn = cn.ToByteArray(); Stream sm_cn = str.ToStream(); sourceLength = cn.Length; byteArrLength = byteArr_cn.Length; streamLength = sm_cn.Length;
char cn_l = (char)byteArr_cn[0]; char cn_r = (char)byteArr_cn[1];
技术支持：http://blog.csdn.net/xxj_jing
对于上面的代码 http://blog.csdn.net/xxj_jing/article/details/7514046 里进行了部分扩展，支持了 stream和byte 的搜索、查找方法！
转载于:https://www.cnblogs.com/xxj-jing/archive/2012/04/26/2890073.html
