c# - 是否可以将索引号替换为 C# 中 String.Format 中的字符串？

Question

我可以这样使用string.Format吗？

1 ) 将数字替换为字符串

string sample = "Hello, {name}";

//I want to put a name string into {name}, is it possible?

* *2 ) 是否可以将字符串一一添加到字符串模板

string sample = "My name is {0}, I am living in {1} ...";

// put {0} value
// and put {1} value separately

ex)
sample[0] = "MIKE";
sample[1] = "Los Anageles";

Answer 1

1. 不

2. 是的; 只需构建一个数组，然后将该数组传递给String.Format（这是您将使用的特定重载）：

   object[] values = new object[2];
   values[0] = ...;
   values[1] = ...;
   String.Format(someString, values);
   

Answer 2

以下是您完成 #2 的方法：

    [Test]
    public void Passing_StringArray_Into_StringFormat()
    {
        var replacements = new string[]
            {
                "MIKE",
                "Los Angeles"
            };
        string sample = string.Format("My name is {0}, I am living in {1} ...", replacements);

        Assert.AreEqual("My name is MIKE, I am living in Los Angeles ...", sample);
    }

Answer 3

您可以使用 James Newton-King 的 FormatWith：http: //james.newtonking.com/archive/2008/03/29/formatwith-2-0-string-formatting-with-named-variables.aspx

Phil Haack 有一篇关于它的好帖子：http: //haacked.com/archive/2009/01/04/fun-with-named-formats-string-parsing-and-edge-cases.aspx

Answer 4

1：

string sample1 = "Hello, {name}";
Console.WriteLine(sample1.Replace("{name}", "John Smith"));

2：

string sample2 = "My name is {0}, I am living in {1} ..."; 
var parms = new ArrayList();
parms.Add("John");
parms.Add("LA");
Console.WriteLine(string.Format(sample2, parms.ToArray()));