.NET开发不可不知、不可不用的辅助类（二）

序列化及反序列化的辅助类SerializeUtil

    /**//// <summary>
    /// 序列化及反序列化的辅助类
    /// </summary>
    public sealed class SerializeUtil
    {
        private SerializeUtil()
        {
        }

        序列化操作函数#region 序列化操作函数

        /**//// <summary>
        /// 将对象序列化为二进制字节
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <returns></returns>
        public static byte[] SerializeToBinary(object obj)
        {
            byte[] bytes = new byte[2500];
            using (MemoryStream memoryStream = new MemoryStream())
            {
                BinaryFormatter bformatter = new BinaryFormatter();
                bformatter.Serialize(memoryStream, obj);
                memoryStream.Seek(0, 0);

                if (memoryStream.Length > bytes.Length)
                {
                    bytes = new byte[memoryStream.Length];
                }
                bytes = memoryStream.ToArray();
            }
            return bytes;
        }

        /**//// <summary>
        /// 将文件对象序列化到文件中
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <param name="path">文件路径</param>
        /// <param name="fileMode">文件打开模式</param>
        public static void SerializeToBinary(object obj, string path, FileMode fileMode)
        {
            using (FileStream fs = new FileStream(path, fileMode))
            {
                // Construct a BinaryFormatter and use it to serialize the data to the stream.
                BinaryFormatter formatter = new BinaryFormatter();
                formatter.Serialize(fs, obj);
            }
        }

        /**//// <summary>
        /// 将文件对象序列化到文件中
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <param name="path">文件路径</param>
        public static void SerializeToBinary(object obj, string path)
        {
            SerializeToBinary(obj, path, FileMode.Create);
        }


        /**//// <summary>
        /// 将对象序列化为Soap字符串
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <returns>Soap字符串</returns>
        public static string SerializeToSoap(object obj)
        {
            string soap = string.Empty;
            using (MemoryStream memoryStream = new MemoryStream())
            {
                SoapFormatter sformatter = new SoapFormatter();
                sformatter.Serialize(memoryStream, obj);
                memoryStream.Seek(0, 0);
                soap = Encoding.ASCII.GetString(memoryStream.ToArray());
            }

            return soap;
        }

        /**//// <summary>
        /// 将对象序列化为Soap字符串，并保存到文件中
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <param name="path">文件路径</param>
        /// <param name="fileMode">文件打开模式</param>
        public static void SerializeToSoap(object obj, string path, FileMode fileMode)
        {
            FileStream fs = new FileStream(path, fileMode);

            // Construct a BinaryFormatter and use it to serialize the data to the stream.
            SoapFormatter formatter = new SoapFormatter();
            try
            {
                formatter.Serialize(fs, obj);
            }
            catch (SerializationException e)
            {
                Console.WriteLine("Failed to serialize. Reason: " + e.Message);
                throw;
            }
            finally
            {
                fs.Close();
            }
        }

        /**//// <summary>
        /// 将对象序列化为Soap字符串，并保存到文件中
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <param name="path">文件路径</param>
        public static void SerializeToSoap(object obj, string path)
        {
            SerializeToSoap(obj, path, FileMode.Create);
        }


        /**//// <summary>
        /// 将对象序列化为XML字符串
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <returns>XML字符串</returns>
        public static string SerializeToXml(object obj)
        {
            string xml = "";
            using (MemoryStream memoryStream = new MemoryStream())
            {
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(memoryStream, obj);
                memoryStream.Seek(0, 0);
                xml = Encoding.ASCII.GetString(memoryStream.ToArray());
            }

            return xml;
        }

        /**//// <summary>
        /// 将对象序列化为XML字符串并保存到文件
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <param name="path">保存的文件路径</param>
        /// <param name="fileMode">文件打开模式</param>
        public static void SerializeToXmlFile(object obj, string path, FileMode fileMode)
        {
            using (FileStream fileStream = new FileStream(path, fileMode))
            {
                // Construct a BinaryFormatter and use it to serialize the data to the stream.
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(fileStream, obj);
            }
        }

        /**//// <summary>
        /// 将对象序列化为XML字符串并保存到文件
        /// </summary>
        /// <param name="obj">待序列化的对象</param>
        /// <param name="path">保存的文件路径</param>
        public static void SerializeToXmlFile(object obj, string path)
        {
            SerializeToXmlFile(obj, path, FileMode.Create);
        }

        #endregion

        反序列化操作函数#region 反序列化操作函数

        /**//// <summary>
        /// 从XML文件中反序列化为Object对象
        /// </summary>
        /// <param name="type">对象的类型</param>
        /// <param name="path">XML文件</param>
        /// <returns>反序列化后得到的对象</returns>
        public static object DeserializeFromXmlFile(Type type, string path)
        {
            object result = new object();
            using (FileStream fileStream = new FileStream(path, FileMode.Open))
            {
                XmlSerializer serializer = new XmlSerializer(type);
                result = serializer.Deserialize(fileStream);
            }

            return result;
        }

        /**//// <summary>
        /// 从XML文件中反序列化为对象
        /// </summary>
        /// <param name="type">对象的类型</param>
        /// <param name="xml">XML字符串</param>
        /// <returns>反序列化后得到的对象</returns>
        public static object DeserializeFromXml(Type type, string xml)
        {
            object result = new object();
            XmlSerializer serializer = new XmlSerializer(type);
            result = serializer.Deserialize(new StringReader(xml));

            return result;
        }

        /**//// <summary>
        /// 从Soap字符串中反序列化为对象
        /// </summary>
        /// <param name="type">对象的类型</param>
        /// <param name="soap">soap字符串</param>
        /// <returns>反序列化后得到的对象</returns>
        public static object DeserializeFromSoap(Type type, string soap)
        {
            object result = new object();
            using (MemoryStream memoryStream = new MemoryStream(new UTF8Encoding().GetBytes(soap)))
            {
                SoapFormatter serializer = new SoapFormatter();
                result = serializer.Deserialize(memoryStream);
            }

            return result;
        }

        /**//// <summary>
        /// 从二进制字节中反序列化为对象
        /// </summary>
        /// <param name="type">对象的类型</param>
        /// <param name="bytes">字节数组</param>
        /// <returns>反序列化后得到的对象</returns>
        public static object DeserializeFromBinary(Type type, byte[] bytes)
        {
            object result = new object();
            using (MemoryStream memoryStream = new MemoryStream(bytes))
            {
                BinaryFormatter serializer = new BinaryFormatter();
                result = serializer.Deserialize(memoryStream);
            }

            return result;
        }

        /**//// <summary>
        /// 从二进制文件中反序列化为对象
        /// </summary>
        /// <param name="type">对象的类型</param>
        /// <param name="path">二进制文件路径</param>
        /// <returns>反序列化后得到的对象</returns>
        public static object DeserializeFromBinary(Type type, string path)
        {
            object result = new object();
            using (FileStream fileStream = new FileStream(path, FileMode.Open))
            {
                BinaryFormatter serializer = new BinaryFormatter();
                result = serializer.Deserialize(fileStream);
            }

            return result;
        }

        #endregion

        /**//// <summary>
        /// 获取对象的转换为二进制的字节大小
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static long GetByteSize(object obj)
        {
            long result;
            BinaryFormatter bFormatter = new BinaryFormatter();
            using (MemoryStream stream = new MemoryStream())
            {
                bFormatter.Serialize(stream, obj);
                result = stream.Length;
            }
            return result;
        }

        /**//// <summary>
        /// 克隆一个对象
        /// </summary>
        /// <param name="obj">待克隆的对象</param>
        /// <returns>克隆的一个新的对象</returns>
        public static object Clone(object obj)
        {
            object cloned = null;
            BinaryFormatter bFormatter = new BinaryFormatter();
            using (MemoryStream memoryStream = new MemoryStream())
            {
                try
                {
                    bFormatter.Serialize(memoryStream, obj);
                    memoryStream.Seek(0, SeekOrigin.Begin);
                    cloned = bFormatter.Deserialize(memoryStream);
                }
                catch //(Exception e)
                {
                    ;
                }
            }

            return cloned;
        }

        /**//// <summary>
        /// 从文件中读取文本内容
        /// </summary>
        /// <param name="path">文件路径</param>
        /// <returns>文件的内容</returns>
        public static string ReadFile(string path)
        {
            string content = string.Empty;
            using (StreamReader reader = new StreamReader(path))
            {
                content = reader.ReadToEnd();
            }

            return content;
        }

        /**//// <summary>
        /// 读取嵌入资源的文本内容
        /// </summary>
        /// <param name="fileWholeName">包含命名空间的嵌入资源文件名路径</param>
        /// <returns>文件中的文本内容</returns>
        public static string ReadFileFromEmbedded(string fileWholeName)
        {
            string result = string.Empty;

            Assembly assembly = Assembly.GetEntryAssembly();
            using (TextReader reader = new StreamReader(assembly.GetManifestResourceStream(fileWholeName)))
            {
                result = reader.ReadToEnd();
            }

            return result;
        }
    }

序列化及反序列化的辅助类SerializeUtil测试代码

    public class TestSerializeUtil
    {
        public static string Execute()
        {
            string result = string.Empty;
            result += "使用SerializeUtil序列化及反序列化的辅助类：" + "\r\n";
            
            Person person = new Person();
            person.Name = "wuhuacong";
            person.Age = 20;
            
            byte[] bytes = SerializeUtil.SerializeToBinary(person);
            Person person2 = SerializeUtil.DeserializeFromBinary(typeof (Person), bytes) as Person;
            result += ReflectionUtil.GetProperties(person2) + "\r\n";
            
            string xml = SerializeUtil.SerializeToXml(person);
            Person person3 = SerializeUtil.DeserializeFromXml(typeof (Person), xml) as Person;
            result += "person3:\r\n" + ReflectionUtil.GetProperties(person3) + "\r\n";
            
            result += "SerializeUtil.GetByteSize(person3):" + SerializeUtil.GetByteSize(person3) + "\r\n";
            
            Person person4 = SerializeUtil.Clone(person3) as Person;
            result += "person4:\r\n" + ReflectionUtil.GetProperties(person4) + "\r\n";
            
            result += "Util.AreObjectsEqual(person3, person4):" + Util.AreObjectsEqual(person3, person4)+ "\r\n";
            
            SerializeUtil.SerializeToXmlFile(person3, Util.CurrentPath + "person3.xml", FileMode.Create);
            Person person5 = SerializeUtil.DeserializeFromXmlFile(typeof (Person), Util.CurrentPath + "person3.xml") as Person;
            result += "person5:\r\n" + ReflectionUtil.GetProperties(person5) + "\r\n\r\n";
            
            result += SerializeUtil.ReadFile(Util.CurrentPath + "person3.xml") + "\r\n\r\n";
            result += SerializeUtil.ReadFileFromEmbedded("TestUtilities.EmbedFile.xml") + "\r\n\r\n";

            return result;
        }
    }

数据库字段NULL值转换辅助类SmartDataReader

    /**//// <summary>
    /// 用来转换含有NULL值的字段为合适值的辅助类
    /// </summary>
    public sealed class SmartDataReader
    {
        private DateTime defaultDate;

        public SmartDataReader(IDataReader reader)
        {
            defaultDate = Convert.ToDateTime("01/01/1900");
            this.reader = reader;
        }

        public int GetInt32(String column)
        {
            int data = (reader.IsDBNull(reader.GetOrdinal(column))) ? (int) 0 : (int) reader[column];
            return data;
        }

        public short GetInt16(String column)
        {
            short data = (reader.IsDBNull(reader.GetOrdinal(column))) ? (short) 0 : (short) reader[column];
            return data;
        }

        public byte GetByte(String column)
        {
            byte data = (reader.IsDBNull(reader.GetOrdinal(column))) ? (byte) 0 : (byte) reader[column];
            return data;
        }

        public float GetFloat(String column)
        {
            float data = (reader.IsDBNull(reader.GetOrdinal(column))) ? 0 : float.Parse(reader[column].ToString());
            return data;
        }

        public double GetDouble(String column)
        {
            double data = (reader.IsDBNull(reader.GetOrdinal(column))) ? 0 : double.Parse(reader[column].ToString());
            return data;
        }

        public decimal GetDecimal(String column)
        {
            decimal data = (reader.IsDBNull(reader.GetOrdinal(column))) ? 0 : decimal.Parse(reader[column].ToString());
            return data;
        }

        public Single GetSingle(String column)
        {
            Single data = (reader.IsDBNull(reader.GetOrdinal(column))) ? 0 : Single.Parse(reader[column].ToString());
            return data;
        }

        public bool GetBoolean(String column)
        {
            bool data = (reader.IsDBNull(reader.GetOrdinal(column))) ? false : (bool) reader[column];
            return data;
        }

        public String GetString(String column)
        {
            String data = (reader.IsDBNull(reader.GetOrdinal(column))) ? null : reader[column].ToString();
            return data;
        }

        public byte[] GetBytes(String column)
        {
            String data = (reader.IsDBNull(reader.GetOrdinal(column))) ? null : reader[column].ToString();
            return Encoding.UTF8.GetBytes(data);
        }

        public Guid GetGuid(String column)
        {
            String data = (reader.IsDBNull(reader.GetOrdinal(column))) ? null : reader[column].ToString();
            Guid guid = Guid.Empty;
            if (data != null)
            {
                guid = new Guid(data);
            }
            return guid;
        }

        public DateTime GetDateTime(String column)
        {
            DateTime data = (reader.IsDBNull(reader.GetOrdinal(column))) ? defaultDate : (DateTime) reader[column];
            return data;
        }

        public bool Read()
        {
            return reader.Read();
        }

        private IDataReader reader;
    }

数据库字段NULL值转换辅助类SmartDataReader测试代码

    public class TestSmartDataReader
    {
        public static string Execute()
        {
            string result = string.Empty;
            result += "使用SmartDataReader辅助类：" + "\r\n";

            try
            {
                TestInfo person = SelectOne();
                result += ReflectionUtil.GetProperties(person) + "\r\n \r\n";
            }
            catch (Exception ex)
            {
                result += string.Format("发生错误:{0}！\r\n \r\n", ex.Message);
            }
            return result;
        }
        
        /**//// <summary>
        /// 将DataReader的属性值转化为实体类的属性值，返回实体类
        /// </summary>
        /// <param name="dataReader">有效的DataReader对象</param>
        /// <returns>实体类对象</returns>
        private static TestInfo DataReaderToEntity(IDataReader dataReader)
        {
            TestInfo testInfo = new TestInfo();
            SmartDataReader reader = new SmartDataReader(dataReader);
            
            testInfo.ID = reader.GetInt32("ID");
            testInfo.Name = reader.GetString("Name");
            testInfo.Age = reader.GetInt32("Age");
            testInfo.Man = reader.GetBoolean("Man");
            testInfo.Birthday = reader.GetDateTime("Birthday");
            
            return testInfo;
        }
        
        public static TestInfo SelectOne()
        {
            TestInfo testInfo = null;
            string sqlCommand = " Select top 1 * from Test";

            string connectionString = "Server=localhost;Database=Test;uid=sa;pwd=123456";
            using(SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();
                SqlCommand com = new SqlCommand(sqlCommand, connection);
                using (IDataReader reader = com.ExecuteReader())
                {
                    if (reader.Read())
                    {
                        testInfo = DataReaderToEntity(reader);
                    }
                }
            }
            return testInfo;
        }
    }

字符串操作辅助类

    /**//// <summary>
    /// 字符串操作辅助类
    /// </summary>
    public class StringUtil
    {
        一些基本的符号常量#region 一些基本的符号常量

        /**//// <summary>
        /// 点符号 .
        /// </summary>
        public const string Dot = ".";

        /**//// <summary>
        /// 下划线 _
        /// </summary>
        public const string UnderScore = "_";

        /**//// <summary>
        /// 逗号加空格 , 
        /// </summary>
        public const string CommaSpace = ", ";

        /**//// <summary>
        /// 逗号 ,
        /// </summary>
        public const string Comma = ",";

        /**//// <summary>
        /// 左括号 (
        /// </summary>
        public const string OpenParen = "(";

        /**//// <summary>
        /// 右括号 )
        /// </summary>
        public const string ClosedParen = ")";

        /**//// <summary>
        /// 单引号 '
        /// </summary>
        public const string SingleQuote = "\'";

        /**//// <summary>
        /// 斜线 \
        /// </summary>
        public const string Slash = @"\";

        #endregion

        private StringUtil()
        {
        }

        /**//// <summary>
        /// 移除空格并首字母小写的Camel样式
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static string ToCamel(string name)
        {
            string clone = name.TrimStart('_');
            clone = RemoveSpaces(ToProperCase(clone));
            return String.Format("{0}{1}", Char.ToLower(clone[0]), clone.Substring(1, clone.Length - 1));
        }

        /**//// <summary>
        /// 移除空格并首字母大写的Pascal样式
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static string ToCapit(string name)
        {
            string clone = name.TrimStart('_');
            return RemoveSpaces(ToProperCase(clone));
        }


        /**//// <summary>
        /// 移除最后的字符
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string RemoveFinalChar(string s)
        {
            if (s.Length > 1)
            {
                s = s.Substring(0, s.Length - 1);
            }
            return s;
        }

        /**//// <summary>
        /// 移除最后的逗号
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string RemoveFinalComma(string s)
        {
            if (s.Trim().Length > 0)
            {
                int c = s.LastIndexOf(",");
                if (c > 0)
                {
                    s = s.Substring(0, s.Length - (s.Length - c));
                }
            }
            return s;
        }

        /**//// <summary>
        /// 移除字符中的空格
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string RemoveSpaces(string s)
        {
            s = s.Trim();
            s = s.Replace(" ", "");
            return s;
        }

        /**//// <summary>
        /// 字符串首字母大写
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string ToProperCase(string s)
        {
            string revised = "";
            if (s.Length > 0)
            {
                if (s.IndexOf(" ") > 0)
                {
                    revised = Strings.StrConv(s, VbStrConv.ProperCase, 1033);
                }
                else
                {
                    string firstLetter = s.Substring(0, 1).ToUpper(new CultureInfo("en-US"));
                    revised = firstLetter + s.Substring(1, s.Length - 1);
                }
            }
            return revised;
        }

        /**//// <summary>
        /// 判断字符是否NULL或者为空
        /// </summary>
        public static bool IsNullOrEmpty(string value)
        {
            if (value == null || value == string.Empty)
            {
                return true;
            }

            return false;
        }
    }

字符串操作辅助类测试代码

    public class TestStringUtil
    {
        public static string Execute()
        {
            string value = "test String,";
            
            string result = string.Empty;
            result += "使用StringUtil字符串操作辅助类：" + "\r\n";
            result += "原字符串为:" + value + "\r\n";
            result += "StringUtil.IsNullOrEmpty:" + StringUtil.IsNullOrEmpty(value) + "\r\n";
            result += "StringUtil.ToCamel:" + StringUtil.ToCamel(value) + "\r\n";
            result += "StringUtil.ToCapit:" + StringUtil.ToCapit(value) + "\r\n";
            result += "StringUtil.RemoveSpaces:" + StringUtil.RemoveSpaces(value) + "\r\n";
            result += "StringUtil.RemoveFinalChar:" + StringUtil.RemoveFinalChar(value) + "\r\n";
            result += "StringUtil.ToProperCase:" + StringUtil.ToProperCase(value) + "\r\n";
            
            result += "\r\n\r\n";
            return result;
        }

Web界面层操作的辅助类

    /**//// <summary>
    /// Web界面层操作的辅助类
    /// </summary>
    public sealed class UIHelper
    {
        private static ILog logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private UIHelper()
        {
        }

        /**//// <summary>
        /// 提示信息，如果异常为HWException类型，则记录到日志
        /// </summary>
        /// <param name="page">当前的页面</param>
        /// <param name="ex">异常对象</param>
        /// <param name="Close">是否关闭</param>
        public static void ShowError(Page page, Exception ex, bool Close)
        {
            logger.Error("Exception:" + page.ID, ex);

            string errorMsg = ex.Message;
            errorMsg = errorMsg.Replace("\n", " ");
            if (Close)
            {
                AlertAndClose(page, errorMsg);
            }
            else
            {
                Alerts(page, errorMsg);
            }
        }

        /**//// <summary>
        /// 提示信息
        /// </summary>
        /// <param name="control">当前的页面</param>
        /// <param name="message">提示信息</param>
        public static void Alerts(Control control, string message)
        {
            string script = string.Format("<script>javascript:alert(\"{0}\");</script>", message).Replace("\r\n", "");
            control.Page.RegisterStartupScript("", script);
        }

        /**//// <summary>
        /// 提示信息并关闭窗口
        /// </summary>
        /// <param name="control">当前的页面</param>
        /// <param name="message">提示信息</param>
        public static void AlertAndClose(Control control, string message)
        {
            string script =
                string.Format("<script>javascript:alert(\"{0}\");window.close();</script>", message).Replace("\r\n", "");
            control.Page.RegisterStartupScript("", script);
        }

        /**//// <summary>
        /// 将错误信息记录到事件日志中
        /// </summary>
        /// <param name="errorMessage">文本信息</param>
        public static void LogError(string errorMessage)
        {
            logger.Error(errorMessage);
        }

        /**//// <summary>
        /// 将错误信息记录到事件日志中
        /// </summary>
        /// <param name="ex">错误对象</param>
        public static void LogError(Exception ex)
        {
            try
            {
                logger.Error(ex.Message + "\n" + ex.Source + "\n" + ex.StackTrace);
            }
            catch
            {
            }
        }

        /**//// <summary>
        /// 弹出提示信息
        /// </summary>
        /// <param name="key">key</param>
        /// <param name="message">提示信息</param>
        /// <param name="page">当前请求的page</param>
        public static void Alert(string key, string message, Page page)
        {
            string msg = string.Format("<script language=\"javascript\">alert(\"{0}\");</script>", message);

            page.RegisterStartupScript(key, msg);
        }

        /**//// <summary>
        /// 弹出提示信息
        /// </summary>
        /// <param name="message"></param>
        /// <param name="page"></param>
        public static void Alert(string message, Page page)
        {
            Alert("message", message, page);
        }

        /**//// <summary>
        /// 定位到指定的页面
        /// </summary>
        /// <param name="GoPage">目标页面</param>
        public static void GoTo(string GoPage)
        {
            HttpContext.Current.Response.Redirect(GoPage);
        }

        /**//// <summary>
        /// 定位到指定的页面
        /// </summary>
        /// <param name="control">当前请求的page</param>
        /// <param name="page">目标页面</param>
        public static void Location(Control control, string page)
        {
            string js = "<script language='JavaScript'>";
            js += "top.location='" + page + "'";
            js += "</script>";
            control.Page.RegisterStartupScript("", js);
        }

        /**//// <summary>
        /// 提示信息并定位到指定的页面
        /// </summary>
        /// <param name="control">当前请求的page</param>
        /// <param name="page">目标页面</param>
        /// <param name="message">提示信息</param>
        public static void AlertAndLocation(Control control, string page, string message)
        {
            string js = "<script language='JavaScript'>";
            js += "alert('" + message + "');";
            js += "top.location='" + page + "'";
            js += "</script>";
            control.Page.RegisterStartupScript("", js);
        }

        /**//// <summary>
        /// 关闭页面，并返回指定的值
        /// </summary>
        /// <param name="control"></param>
        /// <param name="returnValue"></param>
        public static void CloseWin(Control control, string returnValue)
        {
            string js = "<script language='JavaScript'>";
            js += "window.parent.returnValue='" + returnValue + "';";
            js += "window.close();";
            js += "</script>";
            control.Page.RegisterStartupScript("", js);
        }

        /**//// <summary>
        /// 获取Html的锚点
        /// </summary>
        /// <param name="innerText"></param>
        /// <param name="href"></param>
        /// <returns></returns>
        public static HtmlAnchor GetHtmlAnchor(string innerText, string href)
        {
            HtmlAnchor htmlAnchor = new HtmlAnchor();
            htmlAnchor.InnerText = innerText;
            htmlAnchor.HRef = href;

            return htmlAnchor;
        }

        /**//// <summary>
        /// 判断输入的字符是否为数字
        /// </summary>
        /// <param name="strValue"></param>
        /// <returns></returns>
        public static bool IsNumerical(string strValue)
        {
            return Regex.IsMatch(strValue, @"^[0-9]*$");
        }

        /**//// <summary>
        /// 判断字符串是否是NULL或者string.Empty
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        public static bool IsNullorEmpty(string text)
        {
            return text == null || text.Trim() == string.Empty;
        }

        /**//// <summary>
        /// 获取DataGrid控件中选择的项目的ID字符串(要求DataGrid设置datakeyfield="ID")
        /// </summary>
        /// <returns>如果没有选择, 那么返回为空字符串, 否则返回逗号分隔的ID字符串(如1,2,3)</returns>
        public static string GetDatagridItems(DataGrid dg)
        {
            string idstring = string.Empty;
            foreach (DataGridItem item in dg.Items)
            {
                string key = dg.DataKeys[item.ItemIndex].ToString();
                bool isSelected = ((CheckBox) item.FindControl("cbxDelete")).Checked;
                if (isSelected)
                {
                    idstring += "'" + key + "'" + ","; //前后追加单引号，可以其他非数值的ID
                }
            }
            idstring = idstring.Trim(',');

            return idstring;
        }


        /**//// <summary>
        /// 设置下列列表控件的SelectedValue
        /// </summary>
        /// <param name="control">DropDownList控件</param>
        /// <param name="strValue">SelectedValue的值</param>
        public static void SetDropDownListItem(DropDownList control, string strValue)
        {
            if (!IsNullorEmpty(strValue))
            {
                control.ClearSelection();
                ListItem item = control.Items.FindByValue(strValue);
                if (item != null)
                {
                    control.SelectedValue = item.Value;
                }
            }
        }
    }

Web界面层操作的辅助类测试代码

        private void btnShowError_Click(object sender, EventArgs e)
        {
            try
            {
                throw new Exception("测试错误");
            }
            catch (Exception ex)
            {
                UIHelper.ShowError(this, ex, false);
                return;
            }
        }

        private void btnAlert_Click(object sender, EventArgs e)
        {
            UIHelper.Alert("这是一个提示信息", this);
        }