C# 3.0之Object Initializers

2010-07-04 by 嘉瑜,   Category: 码农日记,   Tags: C# No Comments  21次浏览  

我一定是活在时间错位的时空中，比如对jQuery，比如现在的Object Initializer。话不多说，从现在开始学起，追新技术可以很累可是也可以很有趣。

2007年C# 3.0发布的几个新特性为：

Object Initializers

Anonymous Types

Automatic Properties

Extension Methods

Lambda Expressions

LINQ

Collection Initializers

感觉这些特征都与Javascript的Syntax倒是越来越接近，

1. Object Initializers
语句方式与熟悉的jQuery settings极为相象：
MyObj obj = new MyObj{Property1 = 1; Property2 = “Hello World!”;};
前天我写了一个简单的类，是为了处理以前02年的项目中那些可读性为负数的代码，

public class UserSearch
{
    private const char _delimetor = '|';
    public enum SearchMode
    {
        SimpleSearch,
        AdvancedSearch
    }

    public bool IsAdvancedSearch { get; set; }

    // Items (leave all properties 'string' type)
    // ETODO: make it generic in Type
    public string ProductFamily { get; set; }
    public string ProductGroup { get; set; }
    public string ProductSubGroup { get; set; }
    public string ProductName { get; set; }
    public string DocNumber { get; set; }
    public string DocTitle { get; set; }
    public string DocType { get; set; }
    public string ReleaseDTOp { get; set; }
    public string ReleaseDTStartString { get; set; }
    public string ReleaseDTEndString { get; set; }
    public string ContentSearch { get; set; }
    public string SearchTypeIdString { get; set; }
    public string SearchText { get; set; }

    public UserSearch()
    {
    }
}

使用的时候为

UserSearch userSearch =
    new UserSearch
    {
        ProductFamily = (DListFamilies.SelectedValue == "") ? "0" : DListFamilies.SelectedValue,
        ProductGroup = (DListGroups.SelectedValue == "") ? "0" : DListGroups.SelectedValue,
        ProductSubGroup = (DListSubGroups.SelectedValue == "") ? "0" : DListSubGroups.SelectedValue,
        ProductName = TBoxProduct.Text.Trim(),
        DocNumber = TBoxDocNumber.Text.Trim(),
        DocTitle = TBoxDocTitle.Text.Trim(),
        DocType = (DListDocTypes.SelectedValue == "") ? "0" : DListDocTypes.SelectedValue,
        ReleaseDTOp = CtrlDateOp.GetSelectedDateOp(),
        ReleaseDTStartString = CtrlDateOp.GetDateStart(),
        ReleaseDTEndString = CtrlDateOp.GetDateEnd(),
        ContentSearch = TBoxSearchContent.Text.Trim()
    };

这在Javascript里称为disordered，即不需要再在构造函数里面重载，用这种方法即可，是不是很方便呢？

Tags: C#