如何在asp.net中调用部分回发后的AngularJS函数？

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.2/angular.min.js"></script>

<script>
    var app = angular.module('myApp', []);
    app.controller('myCtrl', function($scope) {
        $scope.myFunction = function() {
            // 在这里编写回发后需要执行的函数逻辑
        };
    });
</script>

<div ng-app="myApp" ng-controller="myCtrl">
    <!-- 这里是页面内容 -->
</div>

protected void Page_Load(object sender, EventArgs e)
{
    if (IsPostBack)
    {
        string script = "<script>angular.element(document).ready(function() { angular.element('[ng-controller=myCtrl]').scope().myFunction(); });</script>";
        ClientScript.RegisterStartupScript(GetType(), "CallMyFunction", script);
    }
}