ASP.NETC#通用扩展函数之TypeParse 类型转换方便多了

 

 

用法：

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var int1 = "2".TryToInt();//转换为int失败返回0 var int2 = "2x".TryToInt(); var int3 = "2".TryToInt(1);//转换为int失败返回1 var int4 = "2x".TryToInt(1);     var d1 = "2".TryToMoney(); //同上 var d2 = "2x".TryToMoney(); var d3 = "2".TryToMoney(1); var d4 = "2x".TryToMoney(1);   string a = null; var s1 = a.TryToString(); var s3 = a.TryToString("1");     var d11 = "2".TryToDecimal(); var d22 = "2x".TryToDecimal(); var d33 = "2".TryToDecimal(1); var d44 = "2x".TryToDecimal(1);     var de1 = "2013-1-1".TryToDate(); var de2 = "x2013-1-1".TryToDate(); var de3 = "x2013-1-1".TryToDate(DateTime.Now);     //json和model转换 var json = new { id = 1 }.ModelToJson(); var model = "{id:1}".JsonToModel<ModelTest>();     //list和dataTable转换 var dt = new List<ModelTest>().ListToDataTable(); var list = dt.DataTableToList<ModelTest>();

　　

 

代码：

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Web.Script.Serialization; using System.Data; using System.Reflection; using System.Collections;   namespace SyntacticSugar {     /// <summary>     /// ** 描述：类型转换     /// ** 创始时间：2015-6-2     /// ** 修改时间：-     /// ** 作者：sunkaixuan     /// ** 使用说明：     /// </summary>     public static class TypeParseExtenions     {         #region 强转成int 如果失败返回 0         /// <summary>         /// 强转成int 如果失败返回 0         /// </summary>         /// <param name="thisValue"></param>         /// <param name="i"></param>         /// <returns></returns>         public static int TryToInt(this object thisValue)         {             int reval = 0;             if (thisValue != null && int.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return reval;         }         #endregion         #region 强转成int 如果失败返回 errorValue         /// <summary>         /// 强转成int 如果失败返回 errorValue         /// </summary>         /// <param name="thisValue"></param>         /// <param name="i"></param>         /// <returns></returns>         public static int TryToInt(this object thisValue, int errorValue)         {             int reval = 0;             if (thisValue != null && int.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return errorValue;         }         #endregion         #region 强转成double 如果失败返回 0         /// <summary>         /// 强转成money 如果失败返回 0         /// </summary>         /// <param name="thisValue"></param>         /// <param name="i"></param>         /// <returns></returns>         public static double TryToMoney(this object thisValue)         {             double reval = 0;             if (thisValue != null && double.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return 0;         }         #endregion         #region 强转成double 如果失败返回 errorValue         /// <summary>         /// 强转成double 如果失败返回 errorValue         /// </summary>         /// <param name="thisValue"></param>         /// <param name="errorValue"></param>         /// <returns></returns>         public static double TryToMoney(this object thisValue, int errorValue)         {             double reval = 0;             if (thisValue != null && double.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return errorValue;         }         #endregion         #region 强转成string 如果失败返回 ""         /// <summary>         /// 强转成string 如果失败返回 ""         /// </summary>         /// <param name="thisValue"></param>         /// <param name="i"></param>         /// <returns></returns>         public static string TryToString(this object thisValue)         {             if (thisValue != null) return thisValue.ToString().Trim();             return "";         }         #endregion         #region  强转成string 如果失败返回 errorValue         /// <summary>         /// 强转成string 如果失败返回 str         /// </summary>         /// <param name="thisValue"></param>         /// <param name="errorValue"></param>         /// <returns></returns>         public static string TryToString(this object thisValue, string errorValue)         {             if (thisValue != null) return thisValue.ToString().Trim();             return errorValue;         }         #endregion         #region 强转成Decimal 如果失败返回 0         /// <summary>         /// 强转成Decimal 如果失败返回 0         /// </summary>         /// <param name="thisValue"></param>         /// <param name="i"></param>         /// <returns></returns>         public static Decimal TryToDecimal(this object thisValue)         {             Decimal reval = 0;             if (thisValue != null && decimal.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return 0;         }         #endregion         #region 强转成Decimal 如果失败返回 errorValue         /// <summary>         /// 强转成Decimal 如果失败返回 errorValue         /// </summary>         /// <param name="thisValue"></param>         /// <param name="errorValue"></param>         /// <returns></returns>         public static Decimal TryToDecimal(this object thisValue, int errorValue)         {             Decimal reval = 0;             if (thisValue != null && decimal.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return errorValue;         }         #endregion         #region 强转成DateTime 如果失败返回 DateTime.MinValue         /// <summary>         /// 强转成DateTime 如果失败返回 DateTime.MinValue         /// </summary>         /// <param name="thisValue"></param>         /// <param name="i"></param>         /// <returns></returns>         public static DateTime TryToDate(this object thisValue)         {             DateTime reval = DateTime.MinValue;             if (thisValue != null && DateTime.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return reval;         }         #endregion         #region 强转成DateTime 如果失败返回 errorValue         /// <summary>         /// 强转成DateTime 如果失败返回 errorValue         /// </summary>         /// <param name="thisValue"></param>         /// <param name="errorValue"></param>         /// <returns></returns>         public static DateTime TryToDate(this object thisValue, DateTime errorValue)         {             DateTime reval = DateTime.MinValue;             if (thisValue != null && DateTime.TryParse(thisValue.ToString(), out reval))             {                 return reval;             }             return errorValue;         }         #endregion           #region json转换         /// <summary>         /// 将json序列化为实体         /// </summary>         /// <typeparam name="TEntity"></typeparam>         /// <param name="json"></param>         /// <returns></returns>         public static TEntity JsonToModel<TEntity>(this string json)         {             JavaScriptSerializer jsSerializer = new JavaScriptSerializer();             return jsSerializer.Deserialize<TEntity>(json);         }         /// <summary>         /// 将实体序列化为json         /// </summary>         /// <param name="model"></param>         /// <returns></returns>         public static string ModelToJson<T>(this T model)         {             JavaScriptSerializer jsSerializer = new JavaScriptSerializer();             return jsSerializer.Serialize(model);         }           #endregion           #region  DataTable List         /// <summary>         /// 将集合类转换成DataTable         /// </summary>         /// <param name="list">集合</param>         /// <returns></returns>         public static DataTable ListToDataTable<T>(this List<T> list)         {             DataTable result = new DataTable();             if (list.Count > 0)             {                 PropertyInfo[] propertys = typeof(T).GetProperties();                 foreach (PropertyInfo pi in propertys)                 {                     result.Columns.Add(pi.Name, pi.PropertyType);                 }                   for (int i = 0; i < list.Count; i++)                 {                     ArrayList tempList = new ArrayList();                     foreach (PropertyInfo pi in propertys)                     {                         object obj = pi.GetValue(list[i], null);                         if (obj != null && obj != DBNull.Value)                             tempList.Add(obj);                     }                     object[] array = tempList.ToArray();                     result.LoadDataRow(array, true);                 }             }             return result;         }         /// <summary>         /// 将datatable转为list         /// </summary>         /// <typeparam name="T"></typeparam>         /// <param name="dt"></param>         /// <returns></returns>         public static List<T> DataTableToList<T>(this DataTable dt)         {             var list = new List<T>();             Type t = typeof(T);             var plist = new List<PropertyInfo>(typeof(T).GetProperties());               foreach (DataRow item in dt.Rows)             {                 T s = System.Activator.CreateInstance<T>();                 for (int i = 0; i < dt.Columns.Count; i++)                 {                     PropertyInfo info = plist.Find(p => p.Name == dt.Columns[i].ColumnName);                     if (info != null)                     {                         if (!Convert.IsDBNull(item[i]))                         {                             info.SetValue(s, item[i], null);                         }                     }                 }                 list.Add(s);             }             return list;         }         #endregion       } }