c# - c# winforms如何重复字符串数组成员？

Question

首先，我需要从DataGridView.SelectedCells.Values. 然后我需要将该字符串附加到自身，直到member.count达到限制。例如，如果

string [] = {"a", "b", "c"};  // Where abc are selectedCells.Values.

新的字符串 [] 应该是：

{"a", "b", "c", "a", "b", "c", "a", "b"}

• 例如，如果限制为 8。

请问我怎么解决这个问题？

Answer 1

您可以%在 for 循环中使用 (Modulus)。

string[] oldArr = new string[3] {"a","b","c"};
string[] newArr = new string[8];
int limit = 8;
for ( int i = 0 ; i < limit ; i++ )
{
    newArr[i] = oldArr[i%oldArr.Length];
}

就是这样。

Answer 2

只需为原始数组索引保留一个单独的计数器。就像是：

string[] strings = new string[] { "a", "b", "c" };
string[] final = new string[8];

int index = 0;
for(int i = 0;i < 8;++i)
{
    final[i] = strings[index];
    index = (index + 1) % strings.Length;
}

Answer 3

您可以尝试使用类似的东西

int yourLimit = 8;
int yourIndexer = 0;
string[] strArr = new string[3] { "a", "b", "c" };
List<string> list = new List<string>();
foreach (DataGridViewCell cell in dataGridView1.SelectedCells)
{
    if (strArr.Contains(cell.Value.ToString()) && yourIndexer < yourLimit)
        list.Add(cell.Value.ToString());
    yourIndexer++;
}
string[] strNewArr = list.ToArray<string>();

我希望这有帮助。

Answer 4

此版本用于Array.Copy复制。

    {
        int N=10;
        string[] strings=new string[] { "a", "b", "c" };
        int L=strings.Length;

        int R = (int) Math.Ceiling(N/(1.0*L));
        string[] result=new string[N];
        for(int index=0; index<R; index++)
        {
            int offset = index*L;
            Array.Copy(strings, 0, result, offset, Math.Min(L, N-offset));
        }
    }