Question

我有一个元素类型：

public class FieldInfo
{
  public string Label { get; set; }
  public string Value { get; set; }
}

我有一个充满FieldInfo个对象的数组。

FieldInfo[] infos = new FieldInfo[]
                      {
                        new FieldInfo{Label = "label1", Value = "value1"},
                        new FieldInfo{Label = "label2", Value = "value2"}
                      };

现在我想将该数组转换为包含以下值的新数组：

string[] wantThatArray = new string[] {"label1", "value1", "label2", "value2"};

是否有一种简短的方法可以将infos等数组转换为wantThatArray之类的数组？也许使用LINQ的Select？

Answer 1

string[] wantThatArray = infos
    .SelectMany(f => new[] {f.Label, f.Value})
    .ToArray();

Answer 2

我会保持简单：

string[] wantThatArray = new string[infos.Length * 2];
for(int i = 0 ; i < infos.Length ; i++) {
   wantThatArray[i*2] = infos[i].Label;
   wantThatArray[i*2 + 1] = infos[i].Value;
}

Answer 3

与Marc Gravell的解决方案略有不同的变体

string[] wantThatArray = new string[infos.Length * 2];
for (int i = 0, k = 0; i < infos.Length; i++, k += 2) {
   wantThatArray[k] = infos[i].Label;
   wantThatArray[k + 1] = infos[i].Value;
}

Answer 4

另一种变体：

string[] yourarray = infos.Select(x => string.Format("{0},{1}", x.Label, x.Value))
                          .Aggregate((x, y) => string.Format("{0},{1}", x, y))
                          .Split(',');

mhh但不好...... :(与其他人相比！

Answer 5

FieldInfo[,] infos = new FieldInfo[,]{
                    new FieldInfo{"label1", "value1"},
                    new FieldInfo{"label2", "value2"}
                  };

string[] to = infos.Cast<FieldInfo>().ToArray();

现在，您只需将to转换为infos。

如何将数组转换为双倍如此大的数组？

5 个答案: