WeChatAgreement/IPADDemo/Util/MyUtils.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IPADDemo.Util
{
    public static class MyUtils
    {
        public static bool IsFileInUse(string fileName)
        {
            bool inUse = true;
            FileStream fs = null;
            try
            {

                fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);

                inUse = false;
            }
            catch (Exception ex)
            {
                try
                {
                    Process[] pcs = Process.GetProcesses();
                    foreach (Process p in pcs)
                    {
                        if (p.MainModule.FileName == fileName)
                        {
                            p.Kill();
                        }
                    }
                }
                catch (Exception e) { }
            }
            finally
            {
                if (fs != null)

                    fs.Close();
            }
            return inUse;//true表示正在使用,false没有使用  
        }

        public static Bitmap Base64StringToImage(string basestr)
        {
            Bitmap bitmap = null;
            try
            {
                String inputStr = basestr;
                byte[] arr = Convert.FromBase64String(inputStr);
                MemoryStream ms = new MemoryStream(arr);
                Bitmap bmp = new Bitmap(ms);
                ms.Close();
                bitmap = bmp;
                //MessageBox.Show("转换成功！");
            }
            catch (Exception ex)
            {
                Console.WriteLine("Base64StringToImage 转换失败\nException：" + ex.Message);
            }

            return bitmap;
        }

        public static string ImageToBase64String(this Image image)
        {
            return Convert.ToBase64String(image.ImageToBytes());
        }

        /// <summary>
        /// 字符串转16进制
        /// </summary>
        /// <param name="s"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public static string StringToHexString(string s, Encoding encode)
        {
            byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)//逐字节变为16进制字符
            {
                result += Convert.ToString(b[i], 16);
            }
            return result;
        }

        /// <summary>
        /// 16进制转字符串
        /// </summary>
        /// <param name="hs"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public static string HexStringToString(string hs, Encoding encode)
        {
            string strTemp = "";
            byte[] b = new byte[hs.Length / 2];
            for (int i = 0; i < hs.Length / 2; i++)
            {
                strTemp = hs.Substring(i * 2, 2);
                b[i] = Convert.ToByte(strTemp, 16);
            }
            //按照指定编码将字节数组变为字符串
            return encode.GetString(b);
        }

    }
}