学用 ASP.Net 之 System.Collections.Specialized.OrderedDictionary 类

OrderedDictionary 相当于能用索引访问的哈希表.

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主要成员:

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/* 属性 */

Count;  //元素数

Keys;   //键集合

Values; //值集合



/* 方法 */

Add();      //添加

Clear();    //清空

Contains(); //是否包含

CopyTo();   //将指定元素复制到数组

Insert();   //插入

Remove();   //根据键删除

RemoveAt(); //根据索引删除

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练习:

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protected void Button1_Click(object sender, EventArgs e)

{

    OrderedDictionary od = new OrderedDictionary();

    od.Add("k1", 111);

    od.Add("k2", 222);

    od.Add("k3", 333);



    string s1 = od["k2"].ToString(); //222

    string s2 = od[1].ToString();    //222



    string s3 = "", s4 = "";



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

        s3 += od[i].ToString() + "; ";   //111; 222; 333; 

    }



    foreach (DictionaryEntry de in od)

    {

        s4 += string.Format("{0}:{1}; ", de.Key, de.Value);

    }

    TextBox1.Text = s1 + "\n" + s2 + "\n" + s3 + "\n" + s4; //k1:111; k2:222; k3:333; 

}

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