用法：

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：

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 } }