标签：组复制 str images code com https method isnull image
清空数组>>>Array.Clear [去MSDN查看]
1 string[] str = new string[2]; 2 for (int i = 0; i < str.Length; i++) 3 str[i] = i.ToString(); 4 Array.Clear(str, 0, str.Length); 5 for (int i = 0; i < str.Length; i++) 6 Console.WriteLine(string.IsNullOrEmpty(str[i]) ? "null" : str[i]); 7 //输出结果: 8 //null 9 //null
初始化数组>>>Initialize [去MSDN查看]
只是用于初始化,如果数组子项已经被初始化,那么不会改变它的值.(删除下面代码 x[1] = 6; 试试)
1 int[] x = new int[2]; 2 int[] y = new int[2]; 3 x[0] = 5; x[1] = 6; 4 x.Initialize(); 5 y.Initialize(); 6 for (int i = 0; i < x.Length; i++) 7 Console.WriteLine("x:{0} y:{1}", x[i], y[i]); 8 //输出结果: 9 //x:5 y:0 10 //x:6 y:0
动态修改数组大小>>>Array.Resize [去MSDN查看]
处理流程是:先创建一个新的数组,然后把旧数组赋值过去.
1 int[] x = new int[2]; 2 x[0] = 5; x[1] = 6; 3 Array.Resize(ref x, x.Length + 2); 4 for (int i = 0; i < x.Length; i++) 5 Console.WriteLine("x[{0}]={1}",i, x[i]); 6 //输出结果: 7 //x[0]=5 8 //x[1]=6 9 //x[2]=0 10 //x[3]=0
如果数组较大,性能影响明显,建议用List<>的AddRange方法. [去MSDN查看]
1 List<int> lst = new List<int>(); 2 lst.Add(3); lst.Add(4); 3 int[] x = new int[2]; 4 x[0] = 5; x[1] = 6; 5 lst.AddRange(x); 6 for (int i = 0; i < lst.Count; i++) 7 Console.WriteLine("lst[{0}]={1}", i, lst[i]); 8 //输出结果: 9 //lst[0]=3 10 //lst[1]=4 11 //lst[2]=5 12 //lst[3]=6
关于Array数组复制拷贝,倒叙,排序等,详情参见MSDN
标签：组复制 str images code com https method isnull image
原文地址：http://www.cnblogs.com/xiii/p/7050010.html
