System.InvalidOperationException: This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet.
由错误信息可知MVC2出于对网站数据的保护，默认禁止通过get的请求返回JsonResult数据，你可以在返回Json时，传入第二个参数 JsonRequestBehavior.AllowGet，如：return Json(result, JsonRequestBehavior.AllowGet)，当然你也可以修改你的前端代码，使用post的方式来获取数据。
上面是引用网上一位老兄写的，JsonResult返回值里的第二个参数JsonRequestBehavior.AllowGet,有好多朋友都不理解是什么意思，我自己一开始也不明白，后来想了好长时间，才明白，其实很简单的。我们来看一个例子：如下是一个JsonResult和一个Class
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.Mvc;
using
System.Web.UI.MobileControls;
namespace
MvcApplication1.Controllers
{
public
class
TestJsonController : Controller
{
//
//
GET: /TestJson/
public
ActionResult Index()
{
return
View();
}
public
JsonResult Json()
{
List
<
Address
>
data
=
new
List
<
Address
>
{
new
Address{ID
=
1
,Addresses
=
“
江苏
“
,ParentID
=
0
},
new
Address{ID
=
2
,Addresses
=
“
浙江
“
,ParentID
=
0
},
new
Address{ID
=
3
,Addresses
=
“
福建
“
,ParentID
=
0
},
new
Address{ID
=
4
,Addresses
=
“
苏州
“
,ParentID
=
1
},
new
Address{ID
=
5
,Addresses
=
“
常州
“
,ParentID
=
1
},
new
Address{ID
=
6
,Addresses
=
“
无锡
“
,ParentID
=
1
}
};
return
Json(data);
}
public
class
Address
{
public
int
ID {
get
;
set
; }
public
string
Addresses {
get
;
set
; }
public
int
ParentID {
get
;
set
; }
}
}
}
下面的是HTML和JavaScript代码
@ Page Language
=
“
C#
“
Inherits
=
“
System.Web.Mvc.ViewPage
“
%>
<!
DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”
>
<
html
xmlns
=”http://www.w3.org/1999/xhtml”
>
<
head
runat
=”server”
>
<
title
>
Index
</
title
>
<
script
type
=”text/javascript”
src
=”http://www.cnblogs.com/Scripts/jquery-1.4.1-vsdoc.js”
></
script
>
<
script
type
=”text/javascript”
>
$(
function
() {
//
$.getJSON(“<%= Url.Action(“Json”) %>”,function(data){
//
$(“#Address”).empty();
//
var html=””;
//
$.each(data, function(entryIndex, entry) {
//
if(entry[“ParentID”]==0)
//
{
//
html+=entry[“Addresses”]+” “;
//
}
//
if(entry[“ParentID”]==1)
//
{
//
html+=”<br>”;
//
html+=entry[“Addresses”]+” “;
//
}
//
});
//
$(“#Address”).append(html);
//
});
$.ajax({
type:
‘
POST
‘
,
url:
‘
<%= Url.Action(“Json”) %>
‘
,
contentType:
‘
application/json;charset=utf-8
‘
,
dataType:
‘
json
‘
,
data:
‘
{}
‘
,
success:
function
(data) {
$(
“
#Address
“
).empty();
var
html
=
“”
;
$.each(data,
function
(entryIndex, entry) {
if
(entry[
“
ParentID
“
]
==
0
)
{
html
+=
entry[
“
Addresses
“
]
+
“
“
;
}
if
(entry[
“
ParentID
“
]
==
1
)
{
html
+=
“
<br>
“
;
html
+=
entry[
“
Addresses
“
]
+
“
“
;
}
});
$(
“
#Address
“
).append(html);
alert(data[
0
].Addresses);
}, error:
function
(xhr) {
alert(
‘
出现错误，服务器返回错误信息：
‘
+
xhr.statusText);
}
});
});
</
script
>
</
head
>
<
body
>
<
div
id
=”Address”
>
</
div
>
</
body
>
</
html
>
转载于:https://blog.51cto.com/yerik/1197442
发布者：全栈程序员-用户IM，转载请注明出处：https://javaforall.cn/110141.html原文链接：https://javaforall.cn
【正版授权，激活自己账号】： Jetbrains全家桶Ide使用，1年售后保障，每天仅需1毛
【官方授权 正版激活】： 官方授权 正版激活 支持Jetbrains家族下所有IDE 使用个人JB账号...