ASP. NETC # It is much easier to convert the TypeParse type of general extension functions,

ASP. NETC # It is much easier to convert the TypeParse type of general extension functions,

 

 

Usage:

Var int1 = "2 ". tryToInt (); // If int conversion fails, 0 var int2 = "2x" is returned ". tryToInt (); var int3 = "2 ". tryToInt (1); // If int conversion fails, 1 var int4 = "2x" is returned ". tryToInt (1); var d1 = "2 ". tryToMoney (); // same as var d2 = "2x ". tryToMoney (); var d3 = "2 ". tryToMoney (1); var d4 = "2x ". tryToMoney (1); string a = null; var s1 =. tryToString (); var s3 =. 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 1-1 ". tryToDate (); var de2 = "x2013-1-1 ". tryToDate (); var de3 = "x2013-1-1 ". tryToDate (DateTime. now); // convert var json = new {id = 1} from json and model }. modelToJson (); var model = "{id: 1 }". jsonToModel <ModelTest> (); // convert list and dataTable to var dt = new List <ModelTest> (). listToDataTable (); var list = dt. dataTableToList <ModelTest> ();

　　

 

Code:

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> /// ** Description: type conversion // ** Start Time: // ** modification time: -/// ** Author: sunkaixuan // ** usage instructions: /// </summary> public static class TypeParseExtenions {# region is strongly converted to int. If it fails, 0 is returned. // <summa Ry> /// convert to int. If the conversion fails, 0 is returned. /// </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 ;} # endregion # region is strongly converted to int. If an error occurs, errorValue is returned. // <summary> // It is strongly converted to int. If a failure occurs, errorValue is returned. // </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 # convert region to double. If the result fails, 0 is returned. // <summary> // convert the value to money. If the result fails, 0 is returned. /// </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 is strongly converted to double. If an error occurs, errorValue is returned. // <summary> // if a failure occurs, errorValue is returned. // </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 # Strong conversion of region to string returns "" // <summary> // if it fails to be converted to string, return "" // </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 is strongly converted to string. If the result fails, errorValue is returned. // <summary> // It is strongly converted to string. If the result fails, str is returned. /// </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 is strongly converted to Decimal. If a failure occurs, 0 is returned. // <summary> // if a failure occurs, 0 is returned. // </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 # Strong conversion of region to Decimal returns errorValue if it fails // <summary> // strong conversion to Decimal returns errorValue if it fails /// </summary> /// <param name = "thisValue"> </param> // <param name = "errorValue"> </param> // <returns> </returns> public static Decimal TryToDecimal (this object thisValue, int errorValue) {Decimal reval = 0; if (th IsValue! = Null & decimal. tryParse (thisValue. toString (), out reval) {return reval;} return errorValue ;}# endregion # convert strongly to DateTime if the return value fails. minValue /// <summary> /// convert to DateTime. If the conversion fails, return DateTime. minValue // </summary> /// <param name = "thisValue"> </param> /// <param name = "I"> </param> // /<returns> </returns> public static DateTime TryToDate (this object thisValue) {DateTime reval = DateTime. M InValue; if (thisValue! = Null & DateTime. tryParse (thisValue. toString (), out reval) {return reval ;} # endregion # region is strongly converted to DateTime. If a failure occurs, errorValue is returned. // <summary> // It is strongly converted to DateTime. If a failure occurs, errorValue is returned. // </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 conversion // <summary> // serialize json to an object // </summary> /// <typeparam name = "TEntity"> </ typeparam> // <param name = "json"> </param> // <returns> </returns> public static TEntity JsonToModel <TEntity> (this string json) {JavaScriptSerializer jsSerializer = new JavaScriptSerializer (); ret Urn jsSerializer. deserialize <TEntity> (json );} /// <summary> /// serialize the object to 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> // convert the collection class to a DataTable /// </summary> /// <param Name = "list"> set </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 (Pr OpertyInfo 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> /// convert the able to 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 <Pro PertyInfo> (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 }}