1.返回IEnumerable类型

protected void Page_Load(object sender, EventArgs e)

{

    IEnumerable ie = AllGet();

    Response.Write(new JavaScriptSerializer().Serialize(ie));

}

public IEnumerable AllGet()

{

    return new string[] { "Item1", "Item2" }.Select(s => new

        {

            Name = s,

            Code = s,

            Items = new ArrayList

        {

        new { Name = "Item1" },

        new { Name = "Item2" },

        new { Name = "Item3" },

        new { Name = "Item4" },

    }

        });

}

结果：

[{"Name":"Item1","Code":"Item1","Items":[{"Name":"Item1"},{"Name":"Item2"},{"Name":"Item3"},{"Name":"Item4"}]},

{"Name":"Item2","Code":"Item2","Items":[{"Name":"Item1"},{"Name":"Item2"},{"Name":"Item3"},{"Name":"Item4"}]}]

2.返回List字符串类型

/// <summary>

/// ["1","a","0.5"]

/// </summary>

/// <returns>返回List字符串类型</returns>

public List<string> TestAjaxMethod(int a, string b, double c)

{

    return new List<string> { a.ToString(), b, c.ToString() };

}

3.Dictionary应用

private Dictionary<int, string> dic = new Dictionary<int, string>();

4.NameValueCollection集合

引用：using System.Collections.Specialized;

键是否重复，允许重复

NameValueCollection col = new NameValueCollection();

col.Add("red", "rojo");//如果键值red相同结果合并 rojo,rouge

//显示键，值

PrintKeysAndValues(col);  

//按索引或值获取

col[1];//索引1的值

col["red"]);//键为red的对应值rojo

//查找red键值然后删除

col.Remove("red");   

for (int i = 0; i < col.Count; i++)

//清空集合

col.Clear();

//显示索引, 键,值

col.GetKey(i)

col.Get(i)

foreach (string key in col.Keys)

col[key]

5.Hashtable集合

Hashtable与NameValueCollection相似;

HashTable是键-值集合,但键不能出现重复.

Hashtable ht = new Hashtable();

ht.Add("key","value");