javascript - 参数不应该为空

Question

我在这个清晨遇到了一个有点奇怪的错误。错误很简单

The parameters dictionary contains a null entry for parameter 'FirstDate' of non-nullable type 'System.DateTime' for method 'System.Web.Mvc.ActionResult GeneratePDF(System.DateTime, System.DateTime)' in 'TimeRegPlanner.Controllers.TimeRegistrationController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter. Parameter name: parameters

Controller 看起来像这样

public ActionResult GeneratePDF(DateTime FirstDate, DateTime LastDate)
{
    return Json(new { success = true }, JsonRequestBehavior.AllowGet);
}

这是 JavaScript:

function CreatePDF() {
    var xyz = document.getElementById("regDate").valueAsDate
   // var ShopDocCode = document.getElementById("werkkaart").value

    var first = xyz.getDate() - xyz.getDay() + 1;
    var last = first + 6; // last day is the first day + 6

    var firstday = new Date(xyz.setDate(first)).toUTCString();
    var lastday = new Date(xyz.setDate(last)).toUTCString();
    alert(firstday);
    alert(lastday);
    var x = document.getElementById("checkBox").checked;
    if (x === true) {
        window.location = appPath + "/TimeRegistration/GeneratePDF?FirstDate=" + firstday + "&LastDate=" + lastday;
    }

    setTimeout(function () {
        $("#dialog-Confirm").modal("hide");
    }, 3000);

}

当我在第一天和最后一天进行调试和 console.log 时，我可以看到它们具有正确的值:

firstday: Mon, 24 Jun 2019 00:00:00 GMT lastday: Sun, 30 Jun 2019 00:00:00 GMT

Answer 1

除了我以前从未见过 valueAsDate 之外，我肯定会对日期进行编码并删除路径中的空格

window.location = appPath + "/TimeRegistration/GeneratePDF"+
  "?FirstDate=" + encodeURIComponent(firstday) + 
  "&LastDate="  + encodeURIComponent(lastday);