C#、ASP.NET汎用拡張ツール類のType Parse

var int1 = "2".TryToInt();//   int    0
var int2 = "2x".TryToInt();
var int3 = "2".TryToInt(1);//   int    1
var int4 = "2x".TryToInt(1);
 
 
var d1 = "2".TryToMoney(); //  
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 model  
var json = new { id = 1 }.ModelToJson();
var model = "{id:1}".JsonToModel();
 
 
//list dataTable  
var dt = new List().ListToDataTable();
var list = dt.DataTableToList();

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
{
  /// 

  /// **   ：    
  /// **     ：2015-6-2
  /// **     ：-
  /// **   ：sunkaixuan
  /// **     ：
  /// 
  public static class TypeParseExtenions
  {
    #region    int        0
    /// 

    ///    int        0
    /// 
    /// 
    /// 
    /// 
    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    int        errorValue
    /// 

    ///    int        errorValue
    /// 
    /// 
    /// 
    /// 
    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    double        0
    /// 

    ///    money        0
    /// 
    /// 
    /// 
    /// 
    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    double        errorValue
    /// 

    ///    double        errorValue
    /// 
    /// 
    /// 
    /// 
    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    string        ""
    /// 

    ///    string        ""
    /// 
    /// 
    /// 
    /// 
    public static string TryToString(this object thisValue)
    {
      if (thisValue != null) return thisValue.ToString().Trim();
      return "";
    }
    #endregion
    #region    string        errorValue
    /// 

    ///    string        str
    /// 
    /// 
    /// 
    /// 
    public static string TryToString(this object thisValue, string errorValue)
    {
      if (thisValue != null) return thisValue.ToString().Trim();
      return errorValue;
    }
    #endregion
    #region    Decimal        0
    /// 

    ///    Decimal        0
    /// 
    /// 
    /// 
    /// 
    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    Decimal        errorValue
    /// 

    ///    Decimal        errorValue
    /// 
    /// 
    /// 
    /// 
    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    DateTime        DateTime.MinValue
    /// 

    ///    DateTime        DateTime.MinValue
    /// 
    /// 
    /// 
    /// 
    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    DateTime        errorValue
    /// 

    ///    DateTime        errorValue
    /// 
    /// 
    /// 
    /// 
    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  
    /// 

    ///  json      
    /// 
    /// 
    /// 
    /// 
    public static TEntity JsonToModel(this string json)
    {
      JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
      return jsSerializer.Deserialize(json);
    }
    /// 

    ///        json
    /// 
    /// 
    /// 
    public static string ModelToJson(this T model)
    {
      JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
      return jsSerializer.Serialize(model);
    }
 
    #endregion
 
    #region DataTable List
    /// 

    ///        DataTable
    /// 
    ///   
    /// 
    public static DataTable ListToDataTable(this List 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;
    }
    /// 

    ///  datatable  list
    /// 
    /// 
    /// 
    /// 
    public static List DataTableToList(this DataTable dt)
    {
      var list = new List();
      Type t = typeof(T);
      var plist = new List(typeof(T).GetProperties());
 
      foreach (DataRow item in dt.Rows)
      {
        T s = System.Activator.CreateInstance();
        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
 
  }
}