I'm having issue returning a list of objects from a PageMethods call in JavaScript on an ASP.net ASPX webpage.

In the C# method, If I return a single object it is able to be r,c#,asp.net,javascriptserializer,pagemethods"/>

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I'm having issue returning a list of objects from a PageMethods call in JavaScript on an ASP.net ASPX webpage.

In the C# method, If I return a single object it is able to be r

c# - 退货清单 from C# Method to JavaScript PageMethods

I'm having issue returning a list of objects from a PageMethods call in JavaScript on an ASP.net ASPX webpage.

In the C# method, If I return a single object it is able to be r

问题描述

I'm having issue returning a list of objects from a PageMethods call in JavaScript on an ASP.net ASPX webpage.

In the C# method, If I return a single object it is able to be read by the JavaScript, however If I return a List of objects it returns a 500 error.

Below is an example of returning a single object, which works.

C#

[WebMethod]
public static Project SingleObject()
{
     Project obj = new Project("Thing 1", 10, 10, "Thing 2", new List<string>() { "Thing 3", "Thing 4" }, "thing 5", new List<string>() { "Thing 6", "Thing 7" }, "Thing 8", new List<string>() { "Thing 9", "Thing 10" });

     return obj;
}

JavaScript

function getObject()
{
     var object = PageMethods.GetData(onSuccess, onFailed);

     function onSuccess(data)
     {
         console.log(data.thing1);
     }

     function onFailed(result)
     {
     console.log("Request Failed!");
     }
}

Now if I change the C# method to return a List<Project> instead of a single object, it errors out returning an error 500 within the chrome web console.

Example below.

C#

[WebMethod]
public static List<Project> MulitpleObjects()
{
     Project obj1 = new Project("Thing 1", 10, 10, "Thing 2", new List<string>() { "Thing 3", "Thing 4" }, "thing 5", new List<string>() { "Thing 6", "Thing 7" }, "Thing 8", new List<string>() { "Thing 9", "Thing 10" });
     Project obj2 = new Project("Thing 1", 10, 10, "Thing 2", new List<string>() { "Thing 3", "Thing 4" }, "thing 5", new List<string>() { "Thing 6", "Thing 7" }, "Thing 8", new List<string>() { "Thing 9", "Thing 10" });
     Project obj3 = new Project("Thing 1", 10, 10, "Thing 2", new List<string>() { "Thing 3", "Thing 4" }, "thing 5", new List<string>() { "Thing 6", "Thing 7" }, "Thing 8", new List<string>() { "Thing 9", "Thing 10" });

     List<Project> objects = new List<Project>() { obj1, obj2, obj3 };

     return objects;
}

JavaScript

function getObjects()
{
     var objects = PageMethods.GetData(onSuccess, onFailed);

     function onSuccess(data)
     {
          console.log(data[0].thing1);
     }

     function onFailed(result)
     {
          console.log("Request Failed!");
     }
}

How do I change it to be able to return a List of objects?

Codeigniter: Pass data from model to controller but didn't get in the view file

I was returning query->result() from my model to controller and in the controller I passed the $data to the view file but I am not getting any data in the view file.

Here is the show_model.php file:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Show_model extends CI_Model {

    public function __construct()
    {
        parent::__construct();
        $this->load->database();
    }
    function get_post_data()
    {
        $query=$this->db->get('posts');
        return $query->result();
    }

}

Here is the show.php file:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Show extends CI_controller {

    public function __construct()
    {
        parent::__construct();
    }

    function show_post_data(){

        $this->load->model("Show_model");
        $data['records'] = $this->Show_model->get_post_data();
        $this->load->view('list_view',$data);
    }
}

Here is the show_list.php view file:

<div>
<?php echo "<pre>"; print_r($records); exit; ?>
</div>

标签： c#asp.netjavascriptserializerpagemethods

解决方案

由@DavidTansey 的建议解决

只需将以下内容添加到 web.config 文件中，在此处详细说明

<configuration> 
   <system.web.extensions>
       <scripting>
           <webServices>
               <jsonSerialization maxJsonLength="2147483644"/>
           </webServices>
       </scripting>
   </system.web.extensions>
</configuration>

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