【常用代码】常用的一些代码块

一、记录日志

protected override void OnStart(string[] args)  
{  
    this.WriteLog("\n当前时间：" + DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss") + "\n");  
    this.WriteLog("客户端数据同步服务：【服务启动】");  
}  

protected override void OnStop()  
{  
    this.WriteLog("\n当前时间：" + DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss")+ "\n");  
    this.WriteLog("客户端数据同步服务：【服务停止】");  
}  
protected override void OnShutdown()  
{  
    this.WriteLog("\n当前时间：" + DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss") + "\n");  
    this.WriteLog("客户端数据同步服务：【计算机关闭】");  
}  

#region 记录日志  
/// <summary>  
/// 记录日志  
/// </summary>  
/// <param name="msg"></param>  
private void WriteLog(string msg)  
{  

    //string path = @"C:\log.txt";  

    //该日志文件会存在windows服务程序目录下  
    string path = AppDomain.CurrentDomain.BaseDirectory + "\\log.txt";  
    FileInfo file = new FileInfo(path);  
    if (!file.Exists)  
    {  
        FileStream fs;  
        fs = File.Create(path);  
        fs.Close();  
    }  

    using (FileStream fs = new FileStream(path, FileMode.Append, FileAccess.Write))  
    {  
        using (StreamWriter sw = new StreamWriter(fs))  
        {  
            sw.WriteLine(DateTime.Now.ToString() + "   " + msg);  
        }  
    }  
}  
#endregion  

二、生成二维码

/// <summary>
/// 生成用户名片
/// </summary>
/// <returns></returns>
public ActionResult creQRcode()
{
    string name = Request["name"]==null? "暂无" : Request["name"];
    string tel = Request["phone"] == null ? "400 XXXX 421" : Request["phone"];
    string TITLE = Request["phone"] == null ? "400 XXXX 421" : Request["phone"];
    string ORG = Request["userTypeName"] == null ? "暂无" : Request["userTypeName"];
    string ADR = Request["address"] == null  ? "XXXXX" : Request["address"];
    string URL = "http://www.yhfy.cn/";
    string EMAIL = Request["email"] == null ? "bXXXXX1@126.com" : Request["email"];
    string comment = Request["comment"] == null ? "无" : Request["comment"];

    StringBuilder card = new StringBuilder();
    card.Append("BEGIN:VCARD");
    card.Append("\r\nFN:" + name);//姓名
    card.Append("\r\nTEL;CELL:" + tel);//手机号
    card.Append("\r\nTITLE:" + TITLE);//
    card.Append("\r\nORG:" + ORG+ "-" + comment);
    card.Append("\r\nTEL;WORK:" + "400-6690421");
    card.Append("\r\nADR;WORK:" + ADR);
    card.Append("\r\nURL:" + URL);
    card.Append("\r\nEMAIL;WORK:" + EMAIL);
    card.Append("\r\nEND:VCARD\r\n");

    Bitmap bmp = GetTwoDimensionCode(card.ToString(), string.Empty, 200, 200, "微软雅黑");

    string path = "~/Upload/MyQRCoed/";
    string path2 = Request.MapPath(path);
    if (!Directory.Exists(path2))
    {
        Directory.CreateDirectory(path2);
    }
    string guid = Guid.NewGuid().ToString();
    string newPath = path2 + guid + ".jpg";
    bmp.Save(newPath, ImageFormat.Jpeg);
    string src = "../Upload/MyQRCoed/" + guid + ".jpg";
    return Content(src);

}

/// <summary>
/// 绘制二维码
/// </summary>
/// <param name="strSource"></param>
/// <param name="text"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="fontName"></param>
/// <returns></returns>
public static Bitmap GetTwoDimensionCode(string strSource, string text, int width, int height, string fontName)
{
    // 创建Bitmap对象
    Bitmap bmp = new Bitmap(width, height);
    // 从image创建 Graphics对象
    Graphics objGraphics = Graphics.FromImage(bmp);
    // 填上背景色
    objGraphics.FillRectangle(Brushes.White, 0, 0, bmp.Width, bmp.Height);
    // 
    ThoughtWorks.QRCode.Codec.QRCodeEncoder qrCodeEncoder =
        new ThoughtWorks.QRCode.Codec.QRCodeEncoder();
    // 设置编码方法
    qrCodeEncoder.QRCodeEncodeMode =
        ThoughtWorks.QRCode.Codec.QRCodeEncoder.ENCODE_MODE.BYTE;
    // 设置大小
    qrCodeEncoder.QRCodeScale = 3;
    // 适用于信息量较少的情形，图像越小保存的信息量越少
    // qrCodeEncoder.QRCodeScale = 4;
    // 设置版本
    qrCodeEncoder.QRCodeVersion = 0;
    // 设置错误校验的级别，正因为二维码有纠错能力，才能够加入logo
    qrCodeEncoder.QRCodeErrorCorrect =
        ThoughtWorks.QRCode.Codec.QRCodeEncoder.ERROR_CORRECTION.M;
    Image image = qrCodeEncoder.Encode(strSource, Encoding.GetEncoding("utf-8"));
    // 写入二维码
    int x = (int)(width - image.Width) / 2;
    int y = (int)(height - image.Height) / 2;
    objGraphics.DrawImage(image, new Point(x, y));
    // 添加Logo图标
    image = MvcTMM.Properties.Resources.logo;
    x = (int)(width - image.Width) / 2;
    y = (int)(height - image.Height) / 2;
    objGraphics.DrawImage(image, new Point(x, y));
    // 写入字符串
    //objGraphics.DrawString(text, new Font(fontName, 13, FontStyle.Bold), 
    //    Brushes.Black, new PointF(43, 15));
    return bmp;
}

三、图片加水印

using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Web;

namespace MvcTMM.BaseCode
{

    /// <summary>
    /// 调用方法：传入图片的路径，添加水印的文字
    /// Img.LetterWatermark(@"C:\Users\Administrator\Desktop\Img加水印\Img加水印\bin\1.jpg", "YHFY:种植前田地状态");
    /// </summary>
    
    public class ImgAddText
    {
        #region 文字水印
        ///// <summary>
        ///// 文字水印处理方法
        ///// </summary>
        ///// <param name="path">图片路径（绝对路径）</param>
        ///// <param name="letter">水印文字</param>
        ///// <param name="location">水印位置</param>
        ///// <param name="size">字体大小</param>
        /// <returns>图片路径</returns>
        public static string LetterWatermark(string path, string letter, string location = "LB", int size = 20)
        {
            #region
            //水印的颜色样式
            Color color = System.Drawing.Color.FromArgb(224, 207, 201);
            //添加时间后缀
            letter += " | " + DateTime.Now.ToLocalTime();

            string kz_name = Path.GetExtension(path);
            if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg" || kz_name == ".png")
            {
                DateTime time = DateTime.Now;
                string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();
                Image img = Bitmap.FromFile(path);
                Graphics gs = Graphics.FromImage(img);
                ArrayList loca = GetLocation(location, img, size, letter.Length);
                Font font = new Font("微软雅黑", size);
                Brush br = new SolidBrush(color);
                gs.DrawString(letter, font, br, float.Parse(loca[0].ToString()), float.Parse(loca[1].ToString()));
                gs.Dispose();
                string newpath = Path.GetDirectoryName(path) + filename + kz_name;
                img.Save(newpath);
                img.Dispose();
                File.Copy(newpath, path, true);
                if (File.Exists(newpath))
                {
                    File.Delete(newpath);
                }
            }
            return path;
            #endregion
        }

        /// <summary>
        /// 文字水印位置的方法
        /// </summary>
        /// <param name="location">位置代码</param>
        /// <param name="img">图片对象</param>
        /// <param name="width">宽(当水印类型为文字时,传过来的就是字体的大小)</param>
        /// <param name="height">高(当水印类型为文字时,传过来的就是字符的长度)</param>
        private static ArrayList GetLocation(string location, Image img, int width, int height)
        {
            ArrayList loca = new ArrayList();
            float x = 10;
            float y = 10;

            if (location == "LT")
            {
                loca.Add(x);
                loca.Add(y);
            }
            else if (location == "T")
            {
                x = img.Width / 2 - (width * height) / 2;
                loca.Add(x);
                loca.Add(y);
            }
            else if (location == "RT")
            {
                x = img.Width - width * height;
            }
            else if (location == "LC")
            {
                y = img.Height / 2;
            }
            else if (location == "C")
            {
                x = img.Width / 2 - (width * height) / 2;
                y = img.Height / 2;
            }
            else if (location == "RC")
            {
                x = img.Width - height;
                y = img.Height / 2;
            }
            else if (location == "LB")
            {
                y = img.Height - width - 15;
            }
            else if (location == "B")
            {
                x = img.Width / 2 - (width * height) / 2;
                y = img.Height - width - 5;
            }
            else
            {
                x = img.Width - width * height;
                y = img.Height - width - 5;
            }
            loca.Add(x);
            loca.Add(y);
            return loca;
        }
        #endregion
    }
}