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 反序列化操作函数 /// <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 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); }
本文转自博客园伍华聪的博客，原文链接：.NET开发不可不知、不可不用的辅助类（二），如需转载请自行联系原博主。