根据索引将空白字符串插入数组

Question

假设我有一个数组

string[] A = {"1","2","3","4","5"}

我希望数组的大小为10，并想在某个索引之后插入空白字符串。

例如，我可以将其设置为10，并在索引3之后插入字符串，这将导致

A = {"1","2","3","4","","","","","","5"}

基本上，给定索引之后的元素将被推到末尾，空白字符串将占据它们之间的空白。

这是我尝试过的方法，但是它只添加了一个字符串，并没有为数组精确设置大小

var foos = new List<string>(A);
foos.Insert(33, "");
foos[32] = "";
A = foos.ToArray();

Answer 1

You can use InsertRange

var l = new List<string>{"1","2","3","4","5"};
l.InsertRange(3, new string[10 - l.Count]);
foreach(var i in l)
    Console.WriteLine(i);

Note: The above doesn't populate with empty strings but null values, but you can easily modify the new string[] being used to be populated with your desired default.

For example; see How to populate/instantiate a C# array with a single value?