c# - 字符串连接如何忽略空值和换行符

Question

这是示例代码。

我能够连接所有字符串并用空格分隔它们。

如果字符串为空，连接将被忽略，防止出现双空格。

如何在相同的 ColorList.Where() 参数中忽略换行符 \n？

string red = "Red";
string blue = "Blue";
string yellow = "\n\n";
string green = string.Empty;

List<string> ColorList = new List<string>()
{
    red,
    blue,
    yellow,
    green
};

string colors = string.Join(" ", ColorList.Where(s => !string.IsNullOrEmpty(s)));

Answer 1

只需将 .Where(s => !s.Contains("\n")) 添加到您的查询中:

string red = "Red";
string blue = "Blue";
string yellow = "\n\n";
string green = string.Empty;

 List<string> ColorList = new List<string>()
{
    red,
    blue,
    yellow,
    green
};

string colors = string.Join(" ", ColorList.Where(s => !string.IsNullOrEmpty(s)).Where(s => !s.Contains("\n")));