ForEach子串修剪

实现这一点的一种方法是使用 System.Linq 可拓方法 Take 从字符串的开头“获取”所需的字符数,然后 string.Concat 将这些字符合并回字符串,然后将其用于新值。

用你的例子:

int maxLength = 31;
Locations.ForEach(a => 
    a.Name = string.Concat(a.Name.Replace(@"/", @" ").Replace(@"\", @" ").Take(maxLength));

或者一个完整的可编译示例:

public class Location
{
    public string Name { get; set; }
    public override string ToString()
    {
        return Name;
    }
}

private static void Main()
{
    var locations = new List<Location>();
    var maxLength = 5;

    // Populate our list with locations that have an ever growing Name length
    for (int i = 0; i < 10; i++)
    {
        locations.Add(new Location {Name = new string('*', i)});
    }

    Console.WriteLine("Beginning values:");
    locations.ForEach(Console.WriteLine);

    // Trim the values
    locations.ForEach(l => l.Name = string.Concat(l.Name.Take(maxLength)));

    Console.WriteLine("\nEnding values:");
    locations.ForEach(Console.WriteLine);

    GetKeyFromUser("\nDone! Press any key to exit...");
}

输出

或带有子字符串的示例:

  const int maxLength = 31;  
  Locations.ForEach(a => a.Name = a.Name
    .Substring(0, Math.Min(a.Name.Length, maxLength))
    .Replace(@"/", @" ")
    .Replace(@"\", @" "));