Question

我想要用值替换多个单词，最好的方法是什么？

实施例：这就是我所做的，但感觉和看起来错了

string s ="Dear <Name>, your booking is confirmed for the <EventDate>";
string s1 = s.Replace("<Name>", client.FullName);
string s2 =s1.Replace("<EventDate>", event.EventDate.ToString());

txtMessage.Text = s2;

必须有更好的方法吗？

感谢

Answer 1

您可以使用String.Format。

string.Format("Dear {0}, your booking is confirmed for the {1}", 
   client.FullName, event.EventDate.ToString());

Answer 2

如果您计划拥有动态数量的替换品，这些替换品可能会随时更改，并且您希望使其更加清洁，您可以随时执行以下操作：

// Define name/value pairs to be replaced.
var replacements = new Dictionary<string,string>();
replacements.Add("<Name>", client.FullName);
replacements.Add("<EventDate>", event.EventDate.ToString());

// Replace
string s = "Dear <Name>, your booking is confirmed for the <EventDate>";
foreach (var replacement in replacements)
{
   s = s.Replace(replacement.Key, replacement.Value);
}

Answer 3

基于George的答案，您可以将消息解析为令牌，然后从令牌中构建消息。

如果模板字符串更大并且有更多令牌，那么这将更有效，因为您没有为每个令牌替换重建整个消息。此外，令牌的生成可以移出到Singleton中，因此只执行一次。

// Define name/value pairs to be replaced.
var replacements = new Dictionary<string, string>();
replacements.Add("<Name>", client.FullName);
replacements.Add("<EventDate>", event.EventDate.ToString());

string s = "Dear <Name>, your booking is confirmed for the <EventDate>";

// Parse the message into an array of tokens
Regex regex = new Regex("(<[^>]+>)");
string[] tokens = regex.Split(s);

// Re-build the new message from the tokens
var sb = new StringBuilder();
foreach (string token in tokens)
   sb.Append(replacements.ContainsKey(token) ? replacements[token] : token);
s = sb.ToString();

Answer 4

您可以将替换操作链接在一起：

s = s.Replace(...).Replace(...);

请注意，您无需创建其他字符串即可。

使用String.Format是合适的方法，但前提是您可以更改原始字符串以适应大括号格式。

Answer 5

当你进行多次替换时，使用StringBuilder而不是字符串会更有效率。否则，每次运行时，replace函数都会复制字符串，浪费时间和内存。

Answer 6

使用String.Format：

const string message = "Dear {0}, Please call {1} to get your {2} from {3}";
string name = "Bob";
string callName = "Alice";
string thingy = "Book";
string thingyKeeper = "Library";
string customMessage = string.Format(message, name, callName, thingy, thingyKeeper);

Answer 7

试试这段代码：

string MyString ="This is the First Post to Stack overflow";
MyString = MyString.Replace("the", "My").Replace("to", "to the");

结果：MyString ="This is My First Post to the Stack overflow";

Answer 8

改进@Evan所说的......

string s ="Dear <Name>, your booking is confirmed for the <EventDate>";

string s1 = client.FullName;
string s2 = event.EventDate.ToString();

txtMessage.Text = s.Replace("<Name>", s1).Replace("EventDate", s2);

替换字符串中的多个单词

8 个答案: