ASP.Net 의 System.Collections.Array List 류 를 배 웁 니 다.

Array List 는.Net 의 동적 배열 입 니 다.
주 멤버:

/*      */

ArrayList.Adapter()   //    IList       ArrayList   

ArrayList.FixedSize() //       

ArrayList.ReadOnly()  //     

ArrayList.Repeat()    //             ArrayList



/*    */

Capacity    //  

Count       //   

IsFixedSize //          ?  

IsReadOnly  //        ?  



/*    */

Add()          //  

AddRange()     //      

BinarySearch() //         ,        ;          <0    

Clear()        //  

Contains()     //        

CopyTo()       //       ,       

GetRange()     //  

IndexOf()      //              

Insert()       //  

InsertRange()  //      

LastIndexOf()  //              

Remove()       //      

RemoveAt()     //         

RemoveRange()  //         

Reverse()      //  ,          

SetRange()     //         

Sort()         //  ,             

ToArray()      //      ,          

TrimToSize()   //    (Capacity = Count)

요소 값 은 서로 다른 유형,중복 가능,null 일 수 있 습 니 다.

protected void Button1_Click(object sender, EventArgs e)

{

    ArrayList arr = new ArrayList();

    arr.Add("ABC");

    arr.Add(123);

    arr.Add(3.14);

    arr.Add(null);

    arr.Add(null);



    string s = arr[0].ToString();

    int n = (int)arr[1];

    double f = (double)arr[2];



    TextBox1.Text = string.Concat(s, ", ", n, ", ", f); //ABC, 123, 3.14

    //TextBox1.Text = string.Concat(arr[0], ", ", arr[1], ", ", arr[2]); //  

}

ArrayList.Repeat(),AddRange()및 옮 겨 다 니 기:

protected void Button1_Click(object sender, EventArgs e)

{

    ArrayList arr1 = ArrayList.Repeat("AAA", 3);

    ArrayList arr2 = ArrayList.Repeat("BBB", 4);



    arr1.AddRange(arr2);



    string s1, s2;

    s1 = s2 = "";



    foreach (var x in arr1) {

        s1 += x.ToString() + " ";          //AAA AAA AAA BBB BBB BBB BBB 

    }      

         

    for (int i = 0; i < arr1.Count; i++) {

        s2 += arr1[i].ToString() + " ";    //AAA AAA AAA BBB BBB BBB BBB

    }  



    TextBox1.Text = s1 + "<br>" + s2;

}

GetRange()、SetRange():

protected void Button1_Click(object sender, EventArgs e)

{

    ArrayList arr1 = new ArrayList(6); //    

    arr1.Add(1);

    arr1.Add(2);

    arr1.Add(3);

    arr1.Add(4);

    arr1.Add(5);

    arr1.Add(6);



    ArrayList arr2 = arr1.GetRange(2, 3);

    string s1 = string.Join(", ", arr2.ToArray()); //3, 4, 5



    arr1.SetRange(3, arr2); //arr2          arr1      , arr1        

    string s2 = string.Join(", ", arr1.ToArray()); //1, 2, 3, 3, 4, 5



    TextBox1.Text = s1 + "<br>" + s2;

}

뒤 집기 및 정렬:

protected void Button1_Click(object sender, EventArgs e)

{

    ArrayList arr = new ArrayList(10); //    

    arr.Add(1);

    arr.Add(3);

    arr.Add(5);

    arr.Add(7);

    arr.Add(9);

    arr.Add(2);

    arr.Add(4);

    arr.Add(6);

    arr.Add(8);

    arr.Add(0);



    arr.Reverse();

    string s1 = string.Join(", ", arr.ToArray()); //0, 8, 6, 4, 2, 9, 7, 5, 3, 1



    arr.Reverse(0, arr.Count / 2);

    string s2 = string.Join(", ", arr.ToArray()); //2, 4, 6, 8, 0, 9, 7, 5, 3, 1



    arr.Sort();

    string s3 = string.Join(", ", arr.ToArray()); //0, 1, 2, 3, 4, 5, 6, 7, 8, 9



    TextBox1.Text = s1 + "<br>" + s2 + "<br>" + s3;   

}

삽입 및 삭제:

protected void Button1_Click(object sender, EventArgs e)

{

    ArrayList arr = new ArrayList(9); //    

    for (int i = 0; i < arr.Capacity; ) { arr.Add(++i); }



    string s1 = string.Join(", ", arr.ToArray()); //1, 2, 3, 4, 5, 6, 7, 8, 9



    arr.Insert(0, "A");

    string s2 = string.Join(", ", arr.ToArray()); //A, 1, 2, 3, 4, 5, 6, 7, 8, 9



    arr.Remove("A"); //      ,     

    string s3 = string.Join(", ", arr.ToArray()); //1, 2, 3, 4, 5, 6, 7, 8, 9



    arr.RemoveAt(arr.Count -1);

    string s4 = string.Join(", ", arr.ToArray()); //1, 2, 3, 4, 5, 6, 7, 8



    arr.RemoveRange(4, 3);

    string s5 = string.Join(", ", arr.ToArray()); //1, 2, 3, 4, 8



    arr.InsertRange(3, ArrayList.Repeat("A", 3));

    string s6 = string.Join(", ", arr.ToArray()); //1, 2, 3, A, A, A, 4, 8



    TextBox1.Text = s1 + "<br>" + s2 + "<br>" + s3 + "<br>" + s4 + "<br>" + s5 + "<br>" + s6;   

}

IndexOf()、LastIndexOf():

protected void Button1_Click(object sender, EventArgs e)

{

    char[] charArr = "google".ToCharArray();

    ArrayList arr = new ArrayList(charArr); //           ICollection



    string s1 = string.Join(", ", arr.ToArray()); //g, o, o, g, l, e



    int n1 = arr.IndexOf('g');     //0

    int n2 = arr.LastIndexOf('g'); //3



    TextBox1.Text = string.Concat(s1, "<br>", n1, "<br>", n2);     

}

BinarySearch():

protected void Button1_Click(object sender, EventArgs e)

{

    string[] strArr = { "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten" };

    ArrayList arr = new ArrayList(strArr);



    arr.Sort();

    int i = arr.BinarySearch("nine");              //3

    string str = string.Join(", ", arr.ToArray()); //eight, five, four, nine, one, seven, six, ten, three, two



    TextBox1.Text = string.Concat(i, "<br>", str);

}

FixedSize()、ReadOnly()、IsFixedSize、IsReadOnly:

protected void Button1_Click(object sender, EventArgs e)

{

    ArrayList arr = new ArrayList();



    arr.Add("one");

    arr = ArrayList.FixedSize(arr);



    try { arr.Add("two"); }

    catch (Exception err) { Response.Write(err.Message); }                   //         。

    finally { TextBox1.Text = "FixedSize = " + arr.IsFixedSize.ToString(); } //FixedSize = True

}



protected void Button2_Click(object sender, EventArgs e)

{

    ArrayList arr = ArrayList.Repeat("000", 3);



    arr[0] = "AAA";

    bool b1 = arr.IsReadOnly;      //False

    arr = ArrayList.ReadOnly(arr);

    bool b2 = arr.IsReadOnly;      //True

    //arr[0] = "BBB";              //      



    TextBox1.Text = string.Concat(b1, "<br>", b2);

}