我发现在页面上有多个处理程序的示例以及相关的命名约定(即OnPostXXX)和'asp-post-hanlder'标记帮助程序。但是如何从AJAX调用中调用这些方法之一。
我有一个较旧的示例,其中包含典型的MVC视图和控制器,但这如何与Razor页面一起使用?
例如,如果我使用基本应用程序并将About.cshtml页面修改为以下内容:
@page
@model AboutModel
@{
ViewData["Title"] = "About";
}
<h2>@ViewData["Title"]</h2>
<h3>@Model.Message</h3>
<input type="button" value="Ajax test" class="btn btn-default" onclick="ajaxTest();" />
@section Scripts {
<script type="text/javascript">
function ajaxTest() {
console.log("Entered method");
$.ajax({
type: "POST",
url: '/About', // <-- Where should this point?
contentType: "application/json; charset=utf-8",
dataType: "json",
error: function (xhr, status, errorThrown) {
var err = "Status: " + status + " " + errorThrown;
console.log(err);
}
}).done(function (data) {
console.log(data.result);
})
}
</script>
}
在模型页面About.cshtml.cs
上public class AboutModel : PageModel
{
public string Message { get; set; }
public void OnGet()
{
Message = "Your application description page.";
}
public IActionResult OnPost() {
//throw new Exception("stop");
return new JsonResult("");
}
}
不会从Ajax调用中调用OnPost。
答案 0 :(得分:9)
需要添加AntiForgery令牌,页面上需要有一个表单元素。
在你的Startup.Cs中 在services.AddMvc()
之前添加services.AddAntiforgery(o => o.HeaderName = "XSRF-TOKEN");
然后在你的ajax中,改为:
$.ajax({
type: "POST",
url: '/About', // <-- Where should this point?
contentType: "application/json; charset=utf-8",
beforeSend: function (xhr) {
xhr.setRequestHeader("XSRF-TOKEN",
$('input:hidden[name="__RequestVerificationToken"]').val());
},
dataType: "json"
}).done(function (data) {
console.log(data.result);
})
}
然后在你的方法中添加
[ValidateAntiForgeryToken]
public IActionResult OnPost()
{
//throw new Exception("stop");
return new JsonResult ("Hello Response Back");
}
在cshtml页面上,在表单中包装按钮,否则不会添加AntiForgery cookie。
<form method="post">
<input type="button" value="Ajax test" class="btn btn-default" onclick="ajaxTest();" />
</form>
答案 1 :(得分:1)
请参阅文档的相关部分 https://docs.microsoft.com/en-us/aspnet/core/mvc/razor-pages/?tabs=visual-studio
页面的URL路径关联由页面在文件系统中的位置决定。下表显示了Razor页面路径和匹配的URL
/Pages/Index.cshtml映射到/或/索引
/Pages/Contact.cshtml映射到/ Contact
答案 2 :(得分:0)
一切运作良好,但必须做出一些改变:
1)打开Startup.cs:
public void ConfigureServices(IServiceCollection services)
{
services.AddAntiforgery(o => o.HeaderName = "XSRF-TOKEN");
services.AddMvc();
}
2)打开HomeController.cs:
[ValidateAntiForgeryToken]
public IActionResult OnPost()
{
return new JsonResult("Hello Response Back");
}
3)打开About.cshtml:
@{
ViewData["Title"] = "About";
}
<h2>@ViewData["Title"]</h2>
<h3>@ViewData["Message"]</h3>
<p>Use this area to provide additional information.</p>
<form method="post">
<input type="button" value="Ajax test" class="btn btn-default" onclick="ajaxTest();" />
</form>
<script src="~/lib/jquery/dist/jquery.js"></script>
<script type="text/javascript">
function ajaxTest() {
$.ajax({
type: "POST",
url: 'onPost',
contentType: "application/json; charset=utf-8",
beforeSend: function (xhr) {
xhr.setRequestHeader("XSRF-TOKEN",
$('input:hidden[name="__RequestVerificationToken"]').val());
},
dataType: "json"
}).done(function (data) {
console.log(data.result);
})
}
</script>
应该注意的是&#34; onPost&#34;被添加到控制器内部,所以在AJAX中正确的&#34; url&#34;应该表明。然后:
url: 'onPost',
答案 3 :(得分:0)
答案对我有用。我只想补充一点,如果我们在页面上有自定义方法,如:
public IActionResult OnPostFilter1()
{
return new JsonResult("Hello Response Back");
}
然后我们应该在url中指定处理程序名称:
url: 'OnPost?handler=filter1',
答案 4 :(得分:0)
在查看上面的答案后,我使用Visual Studio 2017 Preview 2获得了JSON ajax以使用.NET Core 2.1 Razor页面:
<强> Startup.cs 强>
services.AddAntiforgery(o => o.HeaderName = "XSRF-TOKEN");
<强> PostJson.cshtml 强>
@page
@model myProj.Pages.PostJsonModel
@{
ViewData["Title"] = "PostJson";
}
<input type="button" value="Post Json" class="btn btn-default" onclick="postJson();" />
<script>
function ajaxRazorPostJson(o) {
return $.ajax({
type: "POST",
data: JSON.stringify(o),
url: 'postJson',
contentType: "application/json; charset=utf-8",
beforeSend: function (xhr) { xhr.setRequestHeader("XSRF-TOKEN", $('input:hidden[name="__RequestVerificationToken"]').val()); },
dataType: "json"
});
}
function postJson() {
ajaxRazorPostJson({ reqKey: "reqVal" }).done(data => alert(data));
}
</script>
<强> PostJson.cshtml.cs 强>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Newtonsoft.Json.Linq;
namespace myProj.Pages
{
public class PostJsonModel : PageModel
{
public IActionResult OnPost([FromBody] JObject jobject)
{
// request buffer in jobject
return new ContentResult { Content = "{ \"resKey\": \"resVal\" }", ContentType = "application/json" };
// or ie return new JsonResult(obj);
}
}
}
<强>浏览器强>
答案 5 :(得分:0)
可接受的解决方案在本地开发机器上工作,但是失败了,然后部署在Nginx反向代理后面的Debian服务器中(未发现404错误)。
这是有效载荷数据的有效示例:
<script type="text/javascript">
$('#btnPost').on('click', function () {
var payloadData; /*asign payload data here */
$.post({ /* method name in code behind, and full path to my view*/
url: '@Url.Action("OnPostAsync", "/Turtas/Inventorius/InventoriausValdymas")',
beforeSend: function (xhr) {
xhr.setRequestHeader("XSRF-TOKEN",
$('input:hidden[name="__RequestVerificationToken"]').val());
},
data: JSON.stringify({ payloadData }),
contentType: "application/json; charset=utf-8",
dataType: "json"
})
})
</script>
VS 2017; .Net Core 2.2 Razor页面; jQuery 3.3.1
答案 6 :(得分:-1)
以下使用 headers 设置在ASP.NET Core MVC 3.1中工作:
$.ajax({
type: "POST",
url: '/Controller/Action',
data: {
id: 'value'
},
headers: {
RequestVerificationToken:
$('input:hidden[name="__RequestVerificationToken"]').val()
},
error: function (xhr, status, errorThrown) {
var err = "Error: " + status + " " + errorThrown;
console.log(err);
}
}).done(function (data) {
console.log(data.result);
});
在控制器方法上包括 ValidateAntiForgeryToken 属性:
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<JsonResult> Action(string id)
{
var result = $"You sent '{id}'";
return Json(new { id, result });
}