C#200个基础工具类，史上最全快收藏下载

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场景

包含工具类部分如下：

CSV文件转换;DataTable转实体;Excel操作类;FTP操作类;Html操作类;IP辅助类;JSON操作;JS操作;URL的操作类;XML操作类;处理多媒体的公共类;弹出消息类;二维码操作类;汉字转拼音;加密解密;科学计数，数学;类型转换;配置文件操作类;上传下载;时间操作类;视频帮助类;数据展示控件绑定数据类;条形码帮助类;图片操作类;文件操作类;序列化;压缩解压缩;邮件;字符串。

实现

部分代码展示

Excel导出类

using System;
using System.Web;
using System.Web.UI;
using System.IO;
using System.Web.UI.WebControls;

namespace Common.Utility
{
    public class ExportExcel
    {

        protected void ExportData(string strContent, string FileName)
        {

            FileName = FileName + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString();

            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Charset = "gb2312";
            HttpContext.Current.Response.ContentType = "application/ms-excel";
            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
            //this.Page.EnableViewState = false; 
            // 添加头信息，为"文件下载/另存为"对话框指定默认文件名 
            HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ".xls");
            // 把文件流发送到客户端 
            HttpContext.Current.Response.Write("<html><head><meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">");
            HttpContext.Current.Response.Write(strContent);
            HttpContext.Current.Response.Write("</body></html>");
            // 停止页面的执行 
            //Response.End();
        }

        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <param name="obj"></param>
        public void ExportData(GridView obj)
        {
            try
            {
                string style = "";
                if (obj.Rows.Count > 0)
                {
                    style = @"<style> .text { mso-number-format:\@; } </style> ";
                }
                else
                {
                    style = "no data.";
                }

                HttpContext.Current.Response.ClearContent();
                DateTime dt = DateTime.Now;
                string filename = dt.Year.ToString() + dt.Month.ToString() + dt.Day.ToString() + dt.Hour.ToString() + dt.Minute.ToString() + dt.Second.ToString();
                HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=ExportData" + filename + ".xls");
                HttpContext.Current.Response.ContentType = "application/ms-excel";
                HttpContext.Current.Response.Charset = "GB2312";
                HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
                StringWriter sw = new StringWriter();
                HtmlTextWriter htw = new HtmlTextWriter(sw);
                obj.RenderControl(htw);
                HttpContext.Current.Response.Write(style);
                HttpContext.Current.Response.Write(sw.ToString());
                HttpContext.Current.Response.End();
            }
            catch
            {
            }
        }

    }
}

 

/*实际应用的例子
 if (list.Count > 0)
                {
 *                  //1.实例化
                    xftwl.Infrastructure.ExportExcel ex = new Infrastructure.ExportExcel();

 *                  //2.指定数据源
                    GridView gv = new GridView();
                    gv.DataSource = list;
                    gv.DataBind();

                    //3.设置导出的excel某列格式
                    if(gv.Rows.Count>0)                     
                    {
                        for (int j = 0; j < gv.Rows.Count; j++)
                        {
                            //把每行第二列格式设为文本格式
                            gv.Rows[j].Cells[1].Attributes.Add("style", "mso-number-format:'\\@'");
                            //每行第三列格式：两位小数
                            gv.Rows[j].Cells[2].Attributes.Add("style", "mso-number-format:'0\\.00'");
                        }
                    }                  

                    ex.ExportData(gv);
                }
 
 
 */

Json操作

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Reflection;
using System.Collections;
using System.Data.Common;
using Newtonsoft.Json;
using System.IO;

namespace Common.Utility
{
    //JSON转换类
    public class ConvertJson
    {
        #region 私有方法
        /// <summary>
        /// 过滤特殊字符
        /// </summary>
        private static string String2Json(String s)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.Length; i++)
            {
                char c = s.ToCharArray()[i];
                switch (c)
                {
                    case '\"':
                        sb.Append("\\\""); break;
                    case '\\':
                        sb.Append("\\\\"); break;
                    case '/':
                        sb.Append("\\/"); break;
                    case '\b':
                        sb.Append("\\b"); break;
                    case '\f':
                        sb.Append("\\f"); break;
                    case '\n':
                        sb.Append("\\n"); break;
                    case '\r':
                        sb.Append("\\r"); break;
                    case '\t':
                        sb.Append("\\t"); break;
                    default:
                        sb.Append(c); break;
                }
            }
            return sb.ToString();
        }

        /// <summary>
        /// 格式化字符型、日期型、布尔型
        /// </summary>
        private static string StringFormat(string str, Type type)
        {
            if (type == typeof(string))
            {
                str = String2Json(str);
                str = "\"" + str + "\"";
            }
            else if (type == typeof(DateTime))
            {
                str = "\"" + str + "\"";
            }
            else if (type == typeof(bool))
            {
                str = str.ToLower();
            }
            else if (type != typeof(string) && string.IsNullOrEmpty(str))
            {
                str = "\"" + str + "\"";
            }
            return str;
        }
        #endregion

        #region List转换成Json
        /// <summary>
        /// List转换成Json
        /// </summary>
        public static string ListToJson<T>(IList<T> list)
        {
            object obj = list[0];
            return ListToJson<T>(list, obj.GetType().Name);
        }

        /// <summary>
        /// List转换成Json 
        /// </summary>
        public static string ListToJson<T>(IList<T> list, string jsonName)
        {
            StringBuilder Json = new StringBuilder();
            if (string.IsNullOrEmpty(jsonName)) jsonName = list[0].GetType().Name;
            Json.Append("{\"" + jsonName + "\":[");
            if (list.Count > 0)
            {
                for (int i = 0; i < list.Count; i++)
                {
                    T obj = Activator.CreateInstance<T>();
                    PropertyInfo[] pi = obj.GetType().GetProperties();
                    Json.Append("{");
                    for (int j = 0; j < pi.Length; j++)
                    {
                        Type type = pi[j].GetValue(list[i], null).GetType();
                        Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list[i], null).ToString(), type));

                        if (j < pi.Length - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < list.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]}");
            return Json.ToString();
        }
        #endregion

        #region 对象转换为Json
        /// <summary> 
        /// 对象转换为Json 
        /// </summary> 
        /// <param name="jsonObject">对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(object jsonObject)
        {
            string jsonString = "{";
            PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
            for (int i = 0; i < propertyInfo.Length; i++)
            {
                object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
                string value = string.Empty;
                if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
                {
                    value = "'" + objectValue.ToString() + "'";
                }
                else if (objectValue is string)
                {
                    value = "'" + ToJson(objectValue.ToString()) + "'";
                }
                else if (objectValue is IEnumerable)
                {
                    value = ToJson((IEnumerable)objectValue);
                }
                else
                {
                    value = ToJson(objectValue.ToString());
                }
                jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "}";
        }
        #endregion

        #region 对象集合转换Json
        /// <summary> 
        /// 对象集合转换Json 
        /// </summary> 
        /// <param name="array">集合对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(IEnumerable array)
        {
            string jsonString = "[";
            foreach (object item in array)
            {
                jsonString += ToJson(item) + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "]";
        }
        #endregion

        #region 普通集合转换Json
        /// <summary> 
        /// 普通集合转换Json 
        /// </summary> 
        /// <param name="array">集合对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToArrayString(IEnumerable array)
        {
            string jsonString = "[";
            foreach (object item in array)
            {
                jsonString = ToJson(item.ToString()) + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "]";
        }
        #endregion

        #region  DataSet转换为Json
        /// <summary> 
        /// DataSet转换为Json 
        /// </summary> 
        /// <param name="dataSet">DataSet对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(DataSet dataSet)
        {
            string jsonString = "{";
            foreach (DataTable table in dataSet.Tables)
            {
                jsonString += "\"" + table.TableName + "\":" + ToJson(table) + ",";
            }
            jsonString = jsonString.TrimEnd(',');
            return jsonString + "}";
        }
        #endregion

        #region Datatable转换为Json
        /// <summary> 
        /// Datatable转换为Json 
        /// </summary> 
        /// <param name="table">Datatable对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(DataTable dt)
        {
            StringBuilder jsonString = new StringBuilder();
            jsonString.Append("[");
            DataRowCollection drc = dt.Rows;
            for (int i = 0; i < drc.Count; i++)
            {
                jsonString.Append("{");
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    string strKey = dt.Columns[j].ColumnName;
                    string strValue = drc[i][j].ToString();
                    Type type = dt.Columns[j].DataType;
                    jsonString.Append("\"" + strKey + "\":");
                    strValue = StringFormat(strValue, type);
                    if (j < dt.Columns.Count - 1)
                    {
                        jsonString.Append(strValue + ",");
                    }
                    else
                    {
                        jsonString.Append(strValue);
                    }
                }
                jsonString.Append("},");
            }
            jsonString.Remove(jsonString.Length - 1, 1);
            jsonString.Append("]");
            return jsonString.ToString();
        }

        /// <summary>
        /// DataTable转换为Json 
        /// </summary>
        public static string ToJson(DataTable dt, string jsonName)
        {
            StringBuilder Json = new StringBuilder();
            if (string.IsNullOrEmpty(jsonName)) jsonName = dt.TableName;
            Json.Append("{\"" + jsonName + "\":[");
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    Json.Append("{");
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        Type type = dt.Rows[i][j].GetType();
                        Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[i][j].ToString(), type));
                        if (j < dt.Columns.Count - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < dt.Rows.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]}");
            return Json.ToString();
        }
        #endregion

        #region DataReader转换为Json
        /// <summary> 
        /// DataReader转换为Json 
        /// </summary> 
        /// <param name="dataReader">DataReader对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(DbDataReader dataReader)
        {
            StringBuilder jsonString = new StringBuilder();
            jsonString.Append("[");
            while (dataReader.Read())
            {
                jsonString.Append("{");
                for (int i = 0; i < dataReader.FieldCount; i++)
                {
                    Type type = dataReader.GetFieldType(i);
                    string strKey = dataReader.GetName(i);
                    string strValue = dataReader[i].ToString();
                    jsonString.Append("\"" + strKey + "\":");
                    strValue = StringFormat(strValue, type);
                    if (i < dataReader.FieldCount - 1)
                    {
                        jsonString.Append(strValue + ",");
                    }
                    else
                    {
                        jsonString.Append(strValue);
                    }
                }
                jsonString.Append("},");
            }
            dataReader.Close();
            jsonString.Remove(jsonString.Length - 1, 1);
            jsonString.Append("]");
            return jsonString.ToString();
        }
        #endregion


        #region Datatable转换为Json 2

        /// <summary>
        /// Datatable转换为Json 2
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static List<Dictionary<string, object>> DataTableToDictionary(DataTable dt)
        {
            List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
            foreach (DataRow dr in dt.Rows)
            {
                Dictionary<string, object> result = new Dictionary<string, object>();
                foreach (DataColumn dc in dt.Columns)
                {
                    result.Add(dc.ColumnName, dr[dc].ToString());
                }
                list.Add(result);
            }
            return list;
        }
        #endregion


        #region SerializeObject

        /// <summary>
        /// SerializeObject
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public static string SerializeObject(object o)
        {
            string json = JsonConvert.SerializeObject(o);
            return json;
        }
        #endregion


        #region 解析JSON字符串生成对象实体

        /// <summary>
        /// 解析JSON字符串生成对象实体
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">json字符串(eg.{"ID":"112","Name":"石子儿"})</param>
        /// <returns>对象实体</returns>
        public static T DeserializeJsonToObject<T>(string json) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(json);
            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
            T t = o as T;
            return t;
        }

        #endregion

        #region 解析JSON数组生成对象实体集合

        /// <summary>
        /// 解析JSON数组生成对象实体集合
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">json数组字符串(eg.[{"ID":"112","Name":"石子儿"}])</param>
        /// <returns>对象实体集合</returns>
        public static List<T> DeserializeJsonToList<T>(string json) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(json);
            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
            List<T> list = o as List<T>;
            return list;
        }

        #endregion

        #region 反序列化JSON到给定的匿名对象

        /// <summary>
        /// 反序列化JSON到给定的匿名对象.
        /// </summary>
        /// <typeparam name="T">匿名对象类型</typeparam>
        /// <param name="json">json字符串</param>
        /// <param name="anonymousTypeObject">匿名对象</param>
        /// <returns>匿名对象</returns>
        public static T DeserializeAnonymousType<T>(string json, T anonymousTypeObject)
        {
            T t = JsonConvert.DeserializeAnonymousType(json, anonymousTypeObject);
            return t;
        }

        #endregion
    }
}

XML操作类

using System.Xml;
using System.Data;

namespace Common.Utility
{
    /// <summary>
    /// Xml的操作公共类
    /// </summary>    
    public class XmlHelper
    {
        #region 字段定义
        /// <summary>
        /// XML文件的物理路径
        /// </summary>
        private string _filePath = string.Empty;
        /// <summary>
        /// Xml文档
        /// </summary>
        private XmlDocument _xml;
        /// <summary>
        /// XML的根节点
        /// </summary>
        private XmlElement _element;
        #endregion

        #region 构造方法
        /// <summary>
        /// 实例化XmlHelper对象
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>
        public XmlHelper(string xmlFilePath)
        {
            //获取XML文件的绝对路径
            _filePath = System.Web.HttpContext.Current.Server.MapPath(xmlFilePath); 
        }
        #endregion

        #region 创建XML的根节点
        /// <summary>
        /// 创建XML的根节点
        /// </summary>
        private void CreateXMLElement()
        {

            //创建一个XML对象
            _xml = new XmlDocument();

            if (DirFile.IsExistFile(_filePath))
            {
                //加载XML文件
                _xml.Load(this._filePath);
            }

            //为XML的根节点赋值
            _element = _xml.DocumentElement;
        }
        #endregion

        #region 获取指定XPath表达式的节点对象
        /// <summary>
        /// 获取指定XPath表达式的节点对象
        /// </summary>        
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME='a']" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName='岗位编号']",@itemName是Item节点的属性.
        /// </param>
        public XmlNode GetNode(string xPath)
        {
            //创建XML的根节点
            CreateXMLElement();

            //返回XPath节点
            return _element.SelectSingleNode(xPath);
        }
        #endregion

        #region 获取指定XPath表达式节点的值
        /// <summary>
        /// 获取指定XPath表达式节点的值
        /// </summary>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME='a']" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName='岗位编号']",@itemName是Item节点的属性.
        /// </param>
        public string GetValue(string xPath)
        {
            //创建XML的根节点
            CreateXMLElement();

            //返回XPath节点的值
            return _element.SelectSingleNode(xPath).InnerText;
        }
        #endregion

        #region 获取指定XPath表达式节点的属性值
        /// <summary>
        /// 获取指定XPath表达式节点的属性值
        /// </summary>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME='a']" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName='岗位编号']",@itemName是Item节点的属性.
        /// </param>
        /// <param name="attributeName">属性名</param>
        public string GetAttributeValue(string xPath, string attributeName)
        {
            //创建XML的根节点
            CreateXMLElement();

            //返回XPath节点的属性值
            return _element.SelectSingleNode(xPath).Attributes[attributeName].Value;
        }
        #endregion

        #region 新增节点
        /// <summary>
        /// 1. 功能：新增节点。
        /// 2. 使用条件：将任意节点插入到当前Xml文件中。
        /// </summary>        
        /// <param name="xmlNode">要插入的Xml节点</param>
        public void AppendNode(XmlNode xmlNode)
        {
            //创建XML的根节点
            CreateXMLElement();

            //导入节点
            XmlNode node = _xml.ImportNode(xmlNode, true);

            //将节点插入到根节点下
            _element.AppendChild(node);
        }

        /// <summary>
        /// 1. 功能：新增节点。
        /// 2. 使用条件：将DataSet中的第一条记录插入Xml文件中。
        /// </summary>        
        /// <param name="ds">DataSet的实例，该DataSet中应该只有一条记录</param>
        public void AppendNode(DataSet ds)
        {
            //创建XmlDataDocument对象
            XmlDataDocument xmlDataDocument = new XmlDataDocument(ds);

            //导入节点
            XmlNode node = xmlDataDocument.DocumentElement.FirstChild;

            //将节点插入到根节点下
            AppendNode(node);
        }
        #endregion

        #region 删除节点
        /// <summary>
        /// 删除指定XPath表达式的节点
        /// </summary>        
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME='a']" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName='岗位编号']",@itemName是Item节点的属性.
        /// </param>
        public void RemoveNode(string xPath)
        {
            //创建XML的根节点
            CreateXMLElement();

            //获取要删除的节点
            XmlNode node = _xml.SelectSingleNode(xPath);

            //删除节点
            _element.RemoveChild(node);
        }
        #endregion //删除节点

        #region 保存XML文件
        /// <summary>
        /// 保存XML文件
        /// </summary>        
        public void Save()
        {
            //创建XML的根节点
            CreateXMLElement();

            //保存XML文件
            _xml.Save(this._filePath);
        }
        #endregion //保存XML文件

        #region 静态方法

        #region 创建根节点对象
        /// <summary>
        /// 创建根节点对象
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>        
        private static XmlElement CreateRootElement(string xmlFilePath)
        {
            //定义变量，表示XML文件的绝对路径
            string filePath = "";

            //获取XML文件的绝对路径
            filePath = System.Web.HttpContext.Current.Server.MapPath(xmlFilePath);

            //创建XmlDocument对象
            XmlDocument xmlDocument = new XmlDocument();
            //加载XML文件
            xmlDocument.Load(filePath);

            //返回根节点
            return xmlDocument.DocumentElement;
        }
        #endregion

        #region 获取指定XPath表达式节点的值
        /// <summary>
        /// 获取指定XPath表达式节点的值
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME='a']" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName='岗位编号']",@itemName是Item节点的属性.
        /// </param>
        public static string GetValue(string xmlFilePath, string xPath)
        {
            //创建根对象
            XmlElement rootElement = CreateRootElement(xmlFilePath);

            //返回XPath节点的值
            return rootElement.SelectSingleNode(xPath).InnerText;
        }
        #endregion

        #region 获取指定XPath表达式节点的属性值
        /// <summary>
        /// 获取指定XPath表达式节点的属性值
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME='a']" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName='岗位编号']",@itemName是Item节点的属性.
        /// </param>
        /// <param name="attributeName">属性名</param>
        public static string GetAttributeValue(string xmlFilePath, string xPath, string attributeName)
        {
            //创建根对象
            XmlElement rootElement = CreateRootElement(xmlFilePath);

            //返回XPath节点的属性值
            return rootElement.SelectSingleNode(xPath).Attributes[attributeName].Value;
        }
        #endregion

        #endregion

         
    }
}

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C#200个基础工具类，史上最全快收藏下载

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