标签： .NET

CefSharp 动态设置代理

2019年8月3日 by admin·0评论

.NET 版 Chromium WebBrowser 动态设置 http, https, socks5 代理方法。

private void InitWebBrowser(string url)
{
	ChromiumWebBrowser browser = new ChromiumWebBrowser(url);
	browser.Dock = DockStyle.Fill;
	//绑定 WebBrowser 初始化完成事件
	browser.IsBrowserInitializedChanged += Browser_IsBrowserInitializedChanged;
	//添加到WinForm中
	this.Controls.Add(browser);
	browser.BringToFront();
}

private void Browser_IsBrowserInitializedChanged(object sender, IsBrowserInitializedChangedEventArgs e)
{
	if(e.IsBrowserInitialized)
	{
		//只能在WebBrowser UI呈现后获取 Request 上下文
		Cef.UIThreadTaskFactory.StartNew(delegate
		{
			//获取 Request 上下文
			var rc = browser.GetBrowser().GetHost().RequestContext;
			var dict = new Dictionary<string, object>();
			dict.Add("mode", "fixed_servers");
			dict.Add("server", "127.0.0.1:1080");
			string error;
			//设置代理
			rc.SetPreference("proxy", dict, out error);
			//如果 error 不为空则表示设置失败。
			if(!string.IsNullOrWhiteSpace(error))
			{
				MessageBox.Show(error, "Tip", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		});
	}
}

不要在 Cef.Initialize 时设置 CefCommandLineArgs.Add("proxy-server", "127.0.0.1:1080");，否则修改代理设置会失败。

C# .NET 清除 IE 临时文件

2019年7月29日 by admin·0评论

利用 shell32 API清除IE缓存。好处是调用系统原生清理，保证效果，不好的就是会弹出窗口，影响用户体验。

public class ShellUtil
{
	[DllImport("shell32.dll")]
	public static extern IntPtr ShellExecute(IntPtr hwnd, string lpOperation, string lpFile, string lpParameters, string lpDirectory, ShowCommands nShowCmd);
}

public enum ShowCommands : int
{
	SW_HIDE = 0,
	SW_SHOWNORMAL = 1,
	SW_NORMAL = 1,
	SW_SHOWMINIMIZED = 2,
	SW_SHOWMAXIMIZED = 3,
	SW_MAXIMIZE = 3,
	SW_SHOWNOACTIVATE = 4,
	SW_SHOW = 5,
	SW_MINIMIZE = 6,
	SW_SHOWMINNOACTIVE = 7,
	SW_SHOWNA = 8,
	SW_RESTORE = 9,
	SW_SHOWDEFAULT = 10,
	SW_FORCEMINIMIZE = 11,
	SW_MAX = 11
}

1、清除IE临时文件

ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 255", "", ShowCommands.SW_HIDE);

2、清除IE Cookies

ShellUtil.ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 2", "", ShowCommands.SW_HIDE);

3、清除IE History

ShellUtil.ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 1", "", ShowCommands.SW_HIDE);

C# .NET Xml序列化与反序列化

2019年7月23日 by admin·0评论

using System;
using System.Data.SqlTypes;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace utility
{
    /// <summary>
    /// Xml序列化与反序列化
    /// </summary>
    public class XmlUtil
    {
        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="xml">XML字符串</param>
        /// <returns></returns>
        public static T Deserialize<T>(string xml) where T : new()
        {
            try
            {
                using (Stream sr = new FileStream(xml, FileMode.Open))
                {
                    XmlSerializer xmldes = new XmlSerializer(typeof(T));
                    return (T)xmldes.Deserialize(sr);
                }
            }
            catch
            {
                return default(T);
            }
        }
		
        /// <summary>
        /// 序列化
        /// </summary>
        /// <param name="obj">对象</param>
        /// <returns></returns>
        public static string Serializer<T>(T obj)
        {
            using (MemoryStream Stream = new MemoryStream())
            {
                XmlSerializer xml = new XmlSerializer(typeof(T));
                try
                {
                    //序列化对象
                    xml.Serialize(Stream, obj);
                }
                catch (InvalidOperationException)
                {
                    throw;
                }
                Stream.Position = 0;
                using (StreamReader sr = new StreamReader(Stream))
                {
                    return sr.ReadToEnd();
                }
            }
        }
    }
}

C# .NET EPPlus 复制 Execl 的 Sheet 到另一个 Execl

2019年7月15日 by admin·0评论

//源Execl名称
string sourceExeclFileName = "C:\\SourceExecl.xlsx";
//目标Execl名称
string targetExeclFileName = "C:\\TargetExecl.xlsx";
using (ExcelPackage package = new ExcelPackage(new FileInfo(targetExeclFileName)))
{
	using (ExcelPackage sourcePackage = new ExcelPackage(new FileInfo(sourceExeclFileName)))
	{
		//new sheet form copy为复制到目标Execl的SheetName
		package.Workbook.Worksheets.Add("new sheet from copy", sourcePackage.Workbook.Worksheets[1]);
	}
	package.Save();
}

C# .NET 获取当月最后一天

2019年7月12日 by admin·0评论

/// <summary>
/// 获取最后一天
/// </summary>
/// <returns>当月最后一天日期</returns>
public static DateTime GetMonthLastDay(DateTime date)
{
	return date.AddDays(1 - date.Day).AddMonths(1).AddDays(-1);
}

C# .NET 获取日期是第几周

2019年7月12日 by admin·0评论

/// <summary>
/// 获取日期是第几周
/// </summary>
/// <param name="date">日期</param>
/// <returns>第几周</returns>
public static int GetWeekOfYear(DateTime date)
{
	//确定此时间在一年中的位置
	int dayOfYear = date.DayOfYear;
	//当年第一天
	DateTime tempDate = new DateTime(date.Year, 1, 1);
	//确定当年第一天
	int tempDayOfWeek = (int)tempDate.DayOfWeek;
	tempDayOfWeek = tempDayOfWeek == 0 ? 7 : tempDayOfWeek;
	//确定星期几
	int index = (int)date.DayOfWeek;
	index = index == 0 ? 7 : index;
	//当前周的范围
	DateTime retStartDay = date.AddDays(-(index - 1));
	DateTime retEndDay = date.AddDays(7 - index);
	//确定当前是第几周
	int weekOfYear = (int)Math.Ceiling(((double)dayOfYear + tempDayOfWeek - 1) / 7);
	if (retStartDay.Year < retEndDay.Year)
	{
		weekOfYear = 1;
	}
	return weekOfYear;
}

C# .NET 输出格式化的 Xml

2019年7月2日 by admin·0评论

默认输出的 InnerXml 显示在一行，看起来非常痛苦，特别是复杂XML文档，输出格式化后的 InnerXml 可以方便快速的查看。

public string GetFormattedInnerXml(XmlDocument doc)
{
    StringBuilder builder = new StringBuilder();
    using (StringWriter sw = new StringWriter(builder))
    {
        using (XmlTextWriter xtw = new XmlTextWriter(sw))
        {
            xtw.Formatting = Formatting.Indented;
            xtw.Indentation = 1;
            xtw.IndentChar = '\t';
            doc.WriteTo(xtw);
        }
    }
    return builder.ToString();
}

C# .NET 利用系统API生成有序GUID

2019年6月2日 by admin·0评论

[DllImport("rpcrt4.dll", SetLastError = true)]
static extern int UuidCreateSequential(out Guid guid);

public static Guid GenerateSequentialGuid()
{
    Guid guid;
    int result = UuidCreateSequential(out guid);
    if (result != 0)
    {
        throw new ApplicationException("Create sequential guid failed: " + result);
    }
    return guid;
}

C# .NET DateTime 与 Unix 时间戳互转

2019年6月2日 by admin·0评论

DateTime 转 Unix 时间戳

DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
int unixTimeSpan = (int)(time - startTime).TotalSeconds;

Unix 时间戳转 DateTime

DateTime dateTimeStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long longTime = long.Parse(timeStamp + "0000000");
TimeSpan toNow = new TimeSpan(longTime);
DateTime dateTime = dateTimeStart.Add(toNow);

C# .NET RSA 加密解密

2019年5月23日 by admin·0评论

namespace Utility.Security
{
    /// <summary>
    /// RSA加密解密
    /// </summary>
    public class RSAUtil
    {
        /// <summary>
        /// RSA加密
        /// </summary>
        /// <param name="str">需要加密的字符串</param>
        /// <param name="encryptKey">密钥</param>
        /// <returns>加密后的字符串</returns>
        public static string RSAEncrypt(string str, string encryptKey)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(str);
            byte[] privKeyBytes = Convert.FromBase64String(encryptKey);
            AsymmetricKeyParameter asymmetricKeyParameter = PrivateKeyFactory.CreateKey(privKeyBytes);
            IAsymmetricBlockCipher signer = new Pkcs1Encoding(new RsaEngine());
            signer.Init(true, asymmetricKeyParameter);
            //加密
            byte[] encryptBytes = signer.ProcessBlock(bytes, 0, bytes.Length);
            string rsaString = Convert.ToBase64String(encryptBytes);
            return rsaString;
        }

        /// <summary>
        /// RSA解密
        /// </summary>
        /// <param name="str">需要解密的字符串</param>
        /// <param name="decryptKey">密钥</param>
        /// <returns>解密后的字符串</returns>
        public static string RSADecrypt(string str, string decryptKey)
        {
            byte[] strBytes = Convert.FromBase64String(str);
            byte[] keyBytes = Convert.FromBase64String(decryptKey);
            AsymmetricKeyParameter asymmetricKeyParameter = PublicKeyFactory.CreateKey(keyBytes);
            IAsymmetricBlockCipher signer = new Pkcs1Encoding(new RsaEngine());
            signer.Init(false, asymmetricKeyParameter);
            byte[] decryptedBytes = signer.ProcessBlock(strBytes, 0, strBytes.Length);
            string decryptString = Encoding.UTF8.GetString(decryptedBytes);
            return decryptString;
        }
    }
}

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