多维数组在C#中也称为矩形数组。它可以是二维的，也可以是三维的。数据以表格形式(行*列)存储，也称为矩阵。
要创建多维数组，无涯教程需要在方括号中使用逗号。例如：
int[,] arr=new int[3,3];//二维数组的声明 int[,,] arr=new int[3,3,3];//3D 数组的声明
C#多维数组示例
看一个用C#编写的多维数组的简单示例，它声明、初始化和遍历二维数组。
using System;
public class MultiArrayExample
{
public static void Main(string[] args)
{
int[,] arr=new int[3,3];//declaration of 2D array
arr[0,1]=10;//initialization
arr[1,2]=20;
arr[2,0]=30;
</span><span class="com">//traversal </span><span class="pln">
</span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++){</span><span class="pln">
</span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++){</span><span class="pln">
</span><span class="typ">Console</span><span class="pun">.</span><span class="typ">Write</span><span class="pun">(</span><span class="pln">arr</span><span class="pun">[</span><span class="pln">i</span><span class="pun">,</span><span class="pln">j</span><span class="pun">]+</span><span class="str">" "</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="typ">Console</span><span class="pun">.</span><span class="typ">WriteLine</span><span class="pun">();</span><span class="com">//new line at each row </span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
}
输出：
0 10 0 0 0 20 30 0 0
C#多维数组示例: Declaration and initialization at same time
在C#While声明中有3种初始化多维数组的方法。
int[,] arr = new int[3,3]= { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
可以省略数组大小。
int[,] arr = new int[,]{ { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
也可以省略新的运算符。
int[,] arr = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
看一个多维数组的简单示例，它在声明时初始化数组。
using System;
public class MultiArrayExample
{
public static void Main(string[] args)
{
int[,] arr = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };//declaration and initialization
</span><span class="com">//traversal </span><span class="pln">
</span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> i</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">i</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">i</span><span class="pun">++){</span><span class="pln">
</span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> j</span><span class="pun">=</span><span class="lit">0</span><span class="pun">;</span><span class="pln">j</span><span class="pun"><</span><span class="lit">3</span><span class="pun">;</span><span class="pln">j</span><span class="pun">++){</span><span class="pln">
</span><span class="typ">Console</span><span class="pun">.</span><span class="typ">Write</span><span class="pun">(</span><span class="pln">arr</span><span class="pun">[</span><span class="pln">i</span><span class="pun">,</span><span class="pln">j</span><span class="pun">]+</span><span class="str">" "</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="typ">Console</span><span class="pun">.</span><span class="typ">WriteLine</span><span class="pun">();</span><span class="com">//new line at each row </span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
}
输出：
1 2 3 4 5 6 7 8 9
