JavaScript 在繼續之前等待 AJAX

Question

在使用 kendo ui 的內聯網格編輯上單擊更新時，我遇到了競爭條件。

在保存時，我在保存時執行以下功能：

dataBound: function (e) {
   // This needs to run after the save has finished           
},
save: function (e) {
    $.when(
        $.ajax({
            type: "GET",
            url: "/Admin/OperatingCentre/GetById?id=" + e.model.OperatingCentreId,
            success: function (data) {
                e.model.OperatingCentreName = data.Name;
            }
        }),
        $.ajax({
            type: "GET",
            url: "/Admin/Division/GetById?id=" + e.model.DivisionId,
            success: function (data) {
                e.model.DivisionName = data.Name;
            }
        }),
        $.ajax({
            type: "GET",
            url: "/Admin/OperatingCompany/GetById?id=" + e.model.OperatingCompanyId,
            success: function (data) {
                e.model.OperatingCompanyName = data.Name;
            }
        })
   );
}

我所追求的是等待 $.when 函數，因為網格不會等待它調用數據綁定，因此 e.model.OperatingCentreName 等沒有及時設置以顯示在網格中。

添加 await 這也無濟於事：

save: async function (e) {
    await $.when(

任何建議將不勝感激。

Answer 1

 dataBound: function(e) { // This needs to run after the save has finished }, save: function(e) { $.when( $.ajax({ type: "GET", url: "/Admin/OperatingCentre/GetById?id=" + e.model.OperatingCentreId, success: function(data) { e.model.OperatingCentreName = data.Name; } }), $.ajax({ type: "GET", url: "/Admin/Division/GetById?id=" + e.model.DivisionId, success: function(data) { e.model.DivisionName = data.Name; } }), $.ajax({ type: "GET", url: "/Admin/OperatingCompany/GetById?id=" + e.model.OperatingCompanyId, success: function(data) { e.model.OperatingCompanyName = data.Name; } }) ).done(function(a1, a2, a3) { // a1, a2, and a3 are arguments resolved for the each of the ajax requests, respectively. // Each argument is an array with the following structure: //[ data, statusText, jqXHR ] // here trigger the dataBound }); }

Answer 2

我相信async/await應該可以解決您的問題

save: async function (e) {

    await $.ajax({
        type: "GET",
        url: "/Admin/OperatingCentre/GetById?id=" + e.model.OperatingCentreId,
        success: function (data) {
            e.model.OperatingCentreName = data.Name;
        }
    }),
    await $.ajax({
        type: "GET",
        url: "/Admin/Division/GetById?id=" + e.model.DivisionId,
        success: function (data) {
            e.model.DivisionName = data.Name;
        }
    }),
    await $.ajax({
        type: "GET",
        url: "/Admin/OperatingCompany/GetById?id=" + e.model.OperatingCompanyId,
        success: function (data) {
            e.model.OperatingCompanyName = data.Name;
        }
    })}

通過這種方式，您將阻止腳本的執行，直到執行 ajax 調用並執行成功回調

Answer 3

添加。 保存功能中的異步

save: async function (e) {}