C＃中具有可变内容的字符串插值 [英] String Interpolation With Variable Content in C#

问题描述

可以将字符串的模板存储在变量中并对其进行插值吗？

Can one store the template of a string in a variable and use interpolation on it?

var name = "Joe";
var template = "Hi {name}";

然后我想做类似的事情：

I then want to do something like:

var result = $template;

原因是我的模板来自数据库。

The reason is my templates will come from a database.

推荐答案

这可以按照要求使用动态编译完成，例如通过 Microsoft.CodeAnalysis.CSharp.Scripting 包。例如：

This can be done as requested using dynamic compilation, such as through the Microsoft.CodeAnalysis.CSharp.Scripting package. For example:

var name = "Joe";
var template = "Hi {name}";
var result = await CSharpScript.EvaluateAsync<string>(
    "var name = \"" + name + "\"; " +
    "return $\"" + template + "\";");

请注意，这种方法很慢，您需要添加更多逻辑来处理转义（和注入攻击）在字符串中，但以上内容只是概念验证。

Note that this approach is slow, and you'd need to add more logic to handle escaping of quotes (and injection attacks) within strings, but the above serves as a proof-of-concept.

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