C# NameValueCollection 初探

 NameValueCollection继承于抽象类NameObjectCollectionBase ，

NameObjectCollectionBase 的语法如下：

public abstract class NameObjectCollectionBase : ICollection, IEnumerable, ISerializable, IDeserializationCallback

 

NameValueCollection的语法如下：

public class NameValueCollection : NameObjectCollectionBase

下面列出NameValueCollection类的属性和方法:

 

下面让我们看看另外一个继承于NameObjectCollectionBase的类HttpApplicationState，

让我们对比一下NameValueCollection 和HttpApplicationState的不同之处和相似之处。

 

/*
Test For Jagged ArrayList From NameValueCollection
(The Upgraded Hashmap Type, Key-->Value1, Value2,ValueN)
sQxJp-m@QiNtOsHilOvExJp4EvEr..2007/10
Copy Right By K.Shi
*/

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections.Specialized;
using System.Collections;

namespace testNamevalueCollection
{
    class testNamevalueCollection
    {
        staticvoid Main(string[] args)
        {
            NameValueCollection nvcn =new NameValueCollection();

            nvcn.Add("FujiXerox","WorkShop");
            nvcn.Add("FujiXerox","Teak");
            nvcn.Add("FujiXerox","DocuWorks");
            nvcn.Add("FujiXerox","PineHurst");

            nvcn.Add("IBM","T42");
            nvcn.Add("IBM","T43");
            nvcn.Add("IBM","T60");
            nvcn.Add("IBM","T60p");
            nvcn.Add("IBM","T61");
            nvcn.Add("IBM","T61p");

            nvcn.Add("iPod","Classic");
            nvcn.Add("iPod","nano");
            nvcn.Add("iPod","nano2");
            nvcn.Add("iPod","video");
            nvcn.Add("iPod","photo");
            nvcn.Add("iPod","touch");
            nvcn.Add("iPod","phone");


            nvcn.Add("ATH","ES7");
            nvcn.Add("ATH","CK9");

            /*
           // Displays the values in the NameValueCollection in two different ways.
           Console.WriteLine("Displays the elements using the AllKeys property and the Item (indexer) property:");
           printKeyAndValues(nvcn);
           Console.WriteLine("Displays the elements using GetKey and Get:");
           printKeyAndValues2(nvcn);

           // Gets a value either by index or by key.
           Console.WriteLine("Index 1 contains the value: {0}.", nvcn[1]);
           Console.WriteLine("Key /"Ipod/" has the value: {0}.", nvcn["iPod"]);
           Console.WriteLine();

           // Copies the values to a string array and displays the string array.
           String[] myStrArr = new String[nvcn.Count];
           nvcn.CopyTo(myStrArr, 0);
           Console.WriteLine("The string array contains:");
           foreach (String s in myStrArr)
               Console.WriteLine("/t {0}", s);
           Console.WriteLine();

           // Searches for a key and deletes it.
           nvcn.Remove("ATH");
           Console.WriteLine("The collection contains the following elements after removing /"ATH/":");
           printKeyAndValues(nvcn);

           // Clears the entire collection.
           nvcn.Clear();
           Console.WriteLine("The collection contains the following elements after it is cleared:");
           printKeyAndValues(nvcn);
           */

            string[][] sa=newstring[nvcn.Count][];
                //= new string[nvcn.Count,];

            for (int m=0; m< nvcn.Count; m++)
            {
                Console.WriteLine(nvcn.GetValues(m).Length);
                sa[m] =newstring[nvcn.GetValues(m).Length];
                for (int n=0; n< nvcn.GetValues(m).Length; n++)
                {
                    sa[m][n] = nvcn.GetValues(m)[n];
                    Console.WriteLine(sa[m][n]);
                }
            }

            Console.WriteLine("/n/n");

            for (int i=0; i< nvcn.Count; i++)
            {
                Console.Write("/nThe {0}: /n", i+1);
                for (int j=0; j< nvcn.GetValues(i).Length; j++)
                {
                    Console.WriteLine(sa[i][j]);
                }
            }

        }

        publicstaticvoid printKeyAndValues(NameValueCollection NVCN)
        {
            IEnumerator ietr = NVCN.GetEnumerator();
            Console.WriteLine("/n#####################################"+
                                "/n# The Table Contains: ["+ NVCN.Count+"] Elements. #/n"
                                    +"#####################################/n");
            Console.WriteLine("/t KEY /t VALUE");
           
            /*
            foreach (String str in NVCN.AllKeys)
            {
                Console.WriteLine("/t {0} /t {1}", str, NVCN[str]);
            }
            */
           
            while (ietr.MoveNext())
            {
                Console.WriteLine("/t {0} /t {1}", ietr.Current, NVCN[ietr.Current.ToString()]);
            }
            Console.WriteLine();
        }

        publicstaticvoid printKeyAndValues2(NameValueCollection NVCN)
        {
            Console.WriteLine("/n#####################################"+
                    "/n# The Table Contains: ["+ NVCN.Count+"] Elements. #/n"
                        +"#####################################/n");
            Console.WriteLine("/t [INDEX] /t KEY /t VALUE");
            for (int i=0; i< NVCN.Count; i++)
                Console.WriteLine("/t [{0}] /t {1} /t {2}", i, NVCN.GetKey(i), NVCN.Get(i));
            Console.WriteLine();
        }

    }
}

 

 

 

运行结果：

 

6
Win3.1
Win98
Win2k
WinXP
Longhorn
WinVista
6
T42
T43
T60
T60p
T61
T61p
7
Classic
nano
nano2
video
photo
touch
phone
2
ES7
CK9

 

The 1:
Win3.1
Win98
Win2k
WinXP
Longhorn
WinVista

The 2:
T42
T43
T60
T60p
T61
T61p

The 3:
Classic
nano
nano2
video
photo
touch
phone

The 4:
ES7
CK9
続行するには何キーを押してください . . .

 

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