UtilityHelper DbHelper

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.IO; using System.Linq; using System.Reflection; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters.Binary; using System.Text; using System.Xml.Serialization;   namespace IOS.DBUtility {     public class UtilityHelper     {         /// <summary>         /// 深度复制对象，被复制对象必须是可序列化         /// </summary>         /// <typeparam name="T"></typeparam>         /// <param name="RealObject"></param>         /// <returns></returns>         public static T Clone<T>(T RealObject)         {             using (Stream objectStream = new MemoryStream())             {                 IFormatter formatter = new BinaryFormatter();                 formatter.Serialize(objectStream, RealObject);                 objectStream.Seek(0, SeekOrigin.Begin);                 return (T)formatter.Deserialize(objectStream);             }           }           /// <summary>         /// 将实体转换成具有相同结构的DataTable         /// </summary>         /// <typeparam name="T"></typeparam>         /// <param name="model">要转换的实体</param>         /// <returns></returns>         public static DataTable ToDataTable<T>(T model)         {             //检查实体集合不能为空             if (model == null)             {                 throw new Exception("需转换的集合为空");             }             //取出第一个实体的所有Propertie             Type entityType = model.GetType();             PropertyInfo[] entityProperties = entityType.GetProperties();               //生成DataTable的structure             //生产代码中，应将生成的DataTable结构Cache起来，此处略             DataTable dt = new DataTable();             for (int i = 0; i < entityProperties.Length; i++)             {                 Type colType = entityProperties[i].PropertyType;                 if(colType.IsGenericType && colType.GetGenericTypeDefinition()==typeof(Nullable<>))                 {                     colType = colType.GetGenericArguments()[0];                 }                 dt.Columns.Add(entityProperties[i].Name,colType);             }             return dt;         }           public static void FullDataRow<T>(T model, DataRow row)         {             //检查实体集合不能为空             if (model == null)             {                 throw new Exception("需转换的集合为空");             }             //取出第一个实体的所有Propertie             Type entityType = model.GetType();             PropertyInfo[] entityProperties = entityType.GetProperties();             for (int i = 0; i < entityProperties.Length; i++)             {                 object value= entityProperties[i].GetValue(model, null);                 if(value==null)                 {                     value = DBNull.Value;                 }                 row[entityProperties[i].Name] = value;             }         }         /// <summary>         /// 用DataRow的数据设置实例         /// </summary>         /// <typeparam name="T"></typeparam>         /// <param name="model"></param>         /// <param name="sourceDataRow"></param>         public static void SetModel<T>(T model, DataRow sourceDataRow)         {             Type entityType = model.GetType();             PropertyInfo[] entityProperties = entityType.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);               foreach (PropertyInfo info in entityProperties)             {                 if (sourceDataRow.Table.Columns.Contains(info.Name))                 {                     if (sourceDataRow[info.Name] != DBNull.Value)                     {                         info.SetValue(model, sourceDataRow[info.Name], null);                     }                 }             }         }         /// <summary>         /// 得到size的字段名FieldName,当size为空时，FieldName="Empty"         /// </summary>         /// <param name="size"></param>         /// <returns></returns>         public static string GetFieldName(string size)         {             if (string.IsNullOrEmpty(size))             {                 return "Empty";             }             else             {                 return size.ToString();             }         }         /// <summary>          /// 获取时间戳          /// </summary>          /// <returns></returns>          public static string GetTimeStamp()         {             TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);             return Convert.ToInt64(ts.TotalSeconds).ToString();         }         /// <summary>         /// 获取类中的属性值         /// </summary>         /// <param name="FieldName"></param>         /// <param name="obj"></param>         /// <returns></returns>         public static string GetModelValue(string FieldName, object obj)         {             try             {                 Type Ts = obj.GetType();                 object o = Ts.GetProperty(FieldName).GetValue(obj, null);                 string Value = Convert.ToString(o);                 if (string.IsNullOrEmpty(Value)) return null;                 return Value;             }             catch             {                 return null;             }         }           /// <summary>         /// 设置类中的属性值         /// </summary>         /// <param name="FieldName"></param>         /// <param name="obj"></param>         /// <returns></returns>         public static bool SetModelValue(string FieldName, object Value, object obj)         {             try             {                 Type Ts = obj.GetType();                 object v = Convert.ChangeType(Value, Ts.GetProperty(FieldName).PropertyType);                 Ts.GetProperty(FieldName).SetValue(obj, v, null);                 return true;             }             catch             {                 return false;             }         }         /// <summary>         /// 将原对象的属性值赋值到目标对象对应的属性         /// </summary>         /// <typeparam name="T"></typeparam>         /// <param name="source"></param>         /// <param name="target"></param>         /// <returns></returns>         public static T CopyToModel<T>(T source, T target)         {             Type tSource = source.GetType();             Type tTarget = target.GetType();             foreach (System.Reflection.PropertyInfo p in tSource.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase))             {                 if (p.CanWrite)                 {                     try                     {                         object value = p.GetValue(source, null);                         tTarget.GetProperty(p.Name).SetValue(target, value, null);                     }                     catch                     {                         continue;                     }                 }             }             return target;         }             /// <summary>         /// 判断控件是否处在设计模式下，注意：当添加的控件将会被其它控件调用时，应当在控件的构造函数和Load事件进行判断处理(仅对用户添加的代码)         /// </summary>         /// <returns></returns>         public static bool IsDesignMode()         {             bool returnFlag = false; #if DEBUG             if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)             {                 returnFlag = true;             }             else if (System.Diagnostics.Process.GetCurrentProcess().ProcessName == "devenv")             {                 returnFlag = true;             } #endif             return returnFlag;         }           /// <summary>         /// 把过滤出来的数据生成到新的DataTable并返回         /// </summary>         /// <param name="dt"></param>         /// <param name="strCondition">过滤条件</param>         /// <returns></returns>         public static DataTable GetNewTable(DataTable dt, string strCondition)         {             DataTable tempDT = dt.Clone();             DataRow[] rows = dt.Select(strCondition);             foreach (DataRow dr in rows)             {                 tempDT.ImportRow(dr);             }             return tempDT;         }           /// <summary>         /// 得到以Sql语法形式的字符串，以便用于Sql语句查询         /// </summary>         /// <param name="items">以逗号分隔的字符串</param>         /// <returns></returns>         public static string GetStringBySql(string items)         {             if (string.IsNullOrEmpty(items))             {                 return items;             }             else             {                 StringBuilder results = new StringBuilder();                 foreach (string item in items.Split(',').ToList())                 {                     if (results.Length == 0)                     {                         results.AppendFormat("'{0}'", item);                     }                     else                     {                         results.AppendFormat(",'{0}'", item);                     }                 }                 return results.ToString();             }         }           #region 类型转换         #region 日期         /// <summary>         /// 转换成日期         /// </summary>         /// <param name="value">日期值</param>         /// <returns></returns>         public static DateTime ToDateTime(object value)         {             if (DBHelper.IsNull(value))             {                 return DBHelper.MinDate;             }             else             {                 DateTime result = DBHelper.MinDate;                 return DateTime.TryParse(value.ToString(), out result) ? result : DBHelper.MinDate;             }         }             #endregion 日期结束           public static double ToDouble(object value)         {             if (DBHelper.IsNull(value))             {                 return 0;             }             else             {                 double result = 0;                 return double.TryParse(value.ToString(), out result) ? result : 0;             }         }         public static int ToInt(object value)         {             if (DBHelper.IsNull(value))             {                 return 0;             }             else             {                 int result = 0;                 return int.TryParse(value.ToString(), out result) ? result : 0;             }         }         public static bool ToBool(object value)         {             if (DBHelper.IsNull(value))             {                 return false;             }             else             {                 bool result = false;                 return bool.TryParse(value.ToString(), out result) ? result : false;             }         }         public static string ToString(object value)         {             if (DBHelper.IsNull(value))             {                 return string.Empty;             }             else             {                 return value.ToString().Trim();             }         }           #endregion 类型转换结束           } }