public static class Extension
{
#region Base
public static String Ex_ToString(this DateTime T)
{
return T.ToString("yyyy-MM-dd HH:mm:ss");
}
public static String Ex_ToString(this DateTime? T)
{
return T.Ex_ToString("yyyy-MM-dd HH:mm:ss");
}
public static String Ex_ToString(this DateTime? T, String Format)
{
return T.Ex_ToString(Format, "");
}
public static String Ex_ToString(this DateTime? T, String Format, String Default)
{
if (T == null) return Default;
return T.HasValue ? T.Value.ToString(String.IsNullOrEmpty(Format) ? "yyyy-MM-dd HH:mm:ss" : Format) : Default;
}
public static Decimal Ex_ToDecimal(this Object O)
{
if (O == null) return 0;
var R = 0m;
Decimal.TryParse(O.ToString(), out R);
return R;
}
public static Decimal Ex_ToDecimal(this Decimal? T)
{
return T.Ex_ToDecimal(2);
}
public static Decimal Ex_ToDecimal(this Decimal? T, Int32 Decimals)
{
return T.Ex_ToDecimal(Decimals, 0m);
}
public static Decimal Ex_ToDecimal(this Decimal? T, Int32 Decimals, Decimal Default)
{
if (T == null) return Default;
return Math.Round(T.Value, Decimals);
}
public static DateTime Ex_ToSqlData(this DateTime Time)
{
return Time > System.Data.SqlTypes.SqlDateTime.MinValue.Value ? Time : System.Data.SqlTypes.SqlDateTime.MinValue.Value;
}
public static Double Ex_ToLinuxData(this DateTime Time)
{
double intResult = 0;
System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
intResult = (Time - startTime).TotalSeconds;
return intResult;
}
public static Double Ex_ToLinuxData()
{
return DateTime.Now.Ex_ToLinuxData();
}
public static String Ex_ToJson<T>(this T E)
{
String Json = "";
if (E != null)
Json = (new JavaScriptSerializer()).Serialize(E);
return Json;
}
public static T Ex_ToEntity<T>(this String Json)
{
return (new JavaScriptSerializer()).Deserialize<T>(Json);
}
public static String Ex_ToString(this String S, Int32 MaxLength)
{
return S.Ex_ToString(MaxLength, "");
}
public static String Ex_ToString(this String S, Int32 MaxLength, String ExtensionStr)
{
S = S ?? "";
return S.Length >= MaxLength ? S.Substring(0, MaxLength) + "" : S;
}
public static IEnumerable<String> Ex_ToList<T>(this String S)
{
return S.Ex_ToList('，', ' ', '\n', '\r', '\t');
}
public static IEnumerable<String> Ex_ToList(this String String, params Char[] SplitArg)
{
if (String.IsNullOrEmpty(String)) return new List<string>();
return String.Split(SplitArg, StringSplitOptions.RemoveEmptyEntries);
}
public static IEnumerable<String> Ex_ToList(String String, params String[] SplitArg)
{
if (String.IsNullOrEmpty(String)) return new List<string>();
return String.Split(SplitArg, StringSplitOptions.RemoveEmptyEntries);
}
public static Int32 Ex_ToInt32(this String S)
{
if (S == null) return 0;
var R = 0;
Int32.TryParse(S, out R);
return R;
}
public static IEnumerable<Int32> Ex_ToInt32<T>(this IEnumerable<T> L)
{
if (L == null) return new List<int>();
var R = L.Select(p => p.ToString().Ex_ToInt32());
return R;
}
public static IEnumerable<T> Ex_ToList<T>(this IEnumerable<IEnumerable<T>> L)
{
var R = new List<T>();
foreach (var I in L)
{
R.AddRange(I);
}
return R;
}
#endregion
#region SelectListItem
public static String Ex_GetText(this IEnumerable<SelectListItem> iList, Int32? Value)
{
var item = iList.FirstOrDefault(p => p.Value == Value.ToString());
if (item != null) return item.Text;
return "--";
}
public static Int32 Ex_GetValue(this IEnumerable<SelectListItem> iList, String Text)
{
var item = iList.FirstOrDefault(p => p.Text == Text);
if (item != null) return item.Value.Ex_ToInt32();
return 0;
}
/// <summary>
///
/// </summary>
/// <param name="iList"></param>
/// <param name="Text"></param>
/// <param name="Value"></param>
/// <param name="Index">从0开始</param>
/// <returns></returns>
public static IEnumerable<SelectListItem> Ex_Add(this IEnumerable<SelectListItem> iList, String Text, String Value, Int32 Index)
{
var List = iList.ToList();
Index = Index > List.Count ? List.Count : Index;
List.Insert(Index, new SelectListItem { Text = Text, Value = Value });
return List;
}
public static IEnumerable<SelectListItem> Ex_AddDefault(this IEnumerable<SelectListItem> iList)
{
var List = iList.ToList();
List.Insert(0, new SelectListItem { Text = "--全部--", Value = "" });
return List;
}
public static IEnumerable<SelectListItem> Ex_SetSelected(this IEnumerable<SelectListItem> iList, Int32? Value)
{
var List = iList.ToList();
List = List.Select(p =>
{
if (p.Value == (Value + "")) p.Selected = true; return p;
}).ToList();
return List;
}
public static IEnumerable<SelectListItem> Ex_SetSelected(this IEnumerable<SelectListItem> iList, String Text)
{
var List = iList.ToList();
List = List.Select(p =>
{
if (p.Text == Text) p.Selected = true; return p;
}).ToList();
return List;
}
#endregion
#region Datatable<=>List
///// <summary>
///// 转化一个DataTable
///// </summary>
///// <typeparam name="T"></typeparam>
///// <param name="list"></param>
///// <returns></returns>
//public static DataTable ToDataTable<T>(this IEnumerable<T> list)
//{
// //创建属性的集合
// List<PropertyInfo> pList = new List<PropertyInfo>();
// //获得反射的入口
// Type type = typeof(T);
// DataTable dt = new DataTable();
// //把所有的public属性加入到集合 并添加DataTable的列
// Array.ForEach<PropertyInfo>(type.GetProperties(), p => { pList.Add(p); dt.Columns.Add(p.Name, p.PropertyType); });
// foreach (var item in list)
// {
// //创建一个DataRow实例
// DataRow row = dt.NewRow();
// //给row 赋值
// pList.ForEach(p => row[p.Name] = p.GetValue(item, null));
// //加入到DataTable
// dt.Rows.Add(row);
// }
// return dt;
//}
///// <summary>
///// DataTable 转换为List 集合
///// </summary>
///// <typeparam name="TResult">类型</typeparam>
///// <param name="dt">DataTable</param>
///// <returns></returns>
//public static List<T> ToList<T>(this DataTable dt) where T : class, new()
//{
// //创建一个属性的列表
// List<PropertyInfo> prlist = new List<PropertyInfo>();
// //获取TResult的类型实例 反射的入口
// Type t = typeof(T);
// //获得TResult 的所有的Public 属性 并找出TResult属性和DataTable的列名称相同的属性(PropertyInfo) 并加入到属性列表
// Array.ForEach<PropertyInfo>(t.GetProperties(), p => { if (dt.Columns.IndexOf(p.Name) != -1) prlist.Add(p); });
// //创建返回的集合
// List<T> oblist = new List<T>();
// foreach (DataRow row in dt.Rows)
// {
// //创建TResult的实例
// T ob = new T();
// //找到对应的数据 并赋值
// prlist.ForEach(p => { if (row[p.Name] != DBNull.Value) p.SetValue(ob, row[p.Name], null); });
// //放入到返回的集合中.
// oblist.Add(ob);
// }
// return oblist;
//}
///// <summary>
///// 将集合类转换成DataTable
///// </summary>
///// <param name="list">集合</param>
///// <returns></returns>
//public static DataTable ToDataTableRow(IList list)
//{
// DataTable result = new DataTable();
// if (list.Count > 0)
// {
// PropertyInfo[] propertys = list[0].GetType().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);
// tempList.Add(obj);
// }
// object[] array = tempList.ToArray();
// result.LoadDataRow(array, true);
// }
// }
// return result;
//}
///**/
///// <summary>
///// 将泛型集合类转换成DataTable
///// </summary>
///// <typeparam name="T">集合项类型</typeparam>
///// <param name="list">集合</param>
///// <returns>数据集(表)</returns>
//public static DataTable ToDataTable<T>(IList<T> list)
//{
// return ToDataTable<T>(list, null);
//}
///**/
///// <summary>
///// 将泛型集合类转换成DataTable
///// </summary>
///// <typeparam name="T">集合项类型</typeparam>
///// <param name="list">集合</param>
///// <param name="propertyName">需要返回的列的列名</param>
///// <returns>数据集(表)</returns>
//public static DataTable ToDataTable<T>(IList<T> list, params string[] propertyName)
//{
// List<string> propertyNameList = new List<string>();
// if (propertyName != null)
// propertyNameList.AddRange(propertyName);
// DataTable result = new DataTable();
// if (list.Count > 0)
// {
// PropertyInfo[] propertys = list[0].GetType().GetProperties();
// foreach (PropertyInfo pi in propertys)
// {
// if (propertyNameList.Count == 0)
// {
// //if (pi.PropertyType==typeof(Nullable<>))
// //{
// result.Columns.Add(pi.Name);
// //}
// //else
// // result.Columns.Add(pi.Name, pi.PropertyType);
// }
// else
// {
// if (propertyNameList.Contains(pi.Name))
// result.Columns.Add(pi.Name, pi.PropertyType);
// }
// }
// for (int i = 0; i < list.Count; i++)
// {
// ArrayList tempList = new ArrayList();
// foreach (PropertyInfo pi in propertys)
// {
// if (propertyNameList.Count == 0)
// {
// object obj = pi.GetValue(list[i], null);
// tempList.Add(obj);
// }
// else
// {
// if (propertyNameList.Contains(pi.Name))
// {
// object obj = pi.GetValue(list[i], null);
// tempList.Add(obj);
// }
// }
// }
// object[] array = tempList.ToArray();
// result.LoadDataRow(array, true);
// }
// }
// return result;
//}
#endregion
}
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