Question

这是我的代码

$http.get("/Student/GetStudentById?studentId=" + $scope.studentId + "&collegeId=" + $scope.collegeId)
          .then(function (result) {
          });

在上面的代码中使用http服务来获取基于id的学生详细信息。但是我想在c＃.net

中编写上面的服务string.format

(eg:- string.format("/Student/GetStudentById/{0}/collegeId/{1}",studentId,collegeId)

Answer 1

   String.format = function () {
      // The string containing the format items (e.g. "{0}")
      // will and always has to be the first argument.
      var theString = arguments[0];

      // start with the second argument (i = 1)
      for (var i = 1; i < arguments.length; i++) {
          // "gm" = RegEx options for Global search (more than one instance)
          // and for Multiline search
          var regEx = new RegExp("\\{" + (i - 1) + "\\}", "gm");
          theString = theString.replace(regEx, arguments[i]);
      }

      return theString;
  }

  $http.get(String.format("/Student/GetStudentById?studentId={0}&collegeId={1}", $scope.studentId , $scope.collegeId))
      .then(function (result) {
      });

Answer 2

试试这个，

String.format = function(str) {
   var args = arguments;
   return str.replace(/{[0-9]}/g, (matched) => args[parseInt(matched.replace(/[{}]/g, ''))+1]);
};

string.format("/Student/GetStudentById/{0}/collegeId/{1}",studentId,collegeId)

Answer 3

你可以使用javascript的sprintf（）。

请查看sprintf()

Answer 4

这是Rest parameter在ES6中派上用场的地方。而且，这是String.Format的另一个JS替代方案，就像在C＃中一样。

String.prototype.format = function(...args) {
    let result = this.toString();
    let i = 0;
    for (let arg of args) {
        let strToReplace = "{" + i++ + "}";
        result = result.replace(strToReplace, (arg || ''));
    }
    return result;
}

E.g。

var path = "/Student/GetStudentById/{0}/collegeId/{1}";
var studentId = "5";
var collegeId = "10";
var result = path.format(studentId, collegeId);
console.log(result);

此输出，

/学生/ GetStudentById / 5 / collegeId / 10

如何在angularjs中编写字符串格式，如c＃？

4 个答案: