jquery 向MVC controller 发送数组参数

遇到了问题，在网上找到了解决方案
自己的代码是
js:
        var nodes = new Array();
        //得到所选节点下面所有节点
        getNodes(treeNode);

        function getNodes(selectedNode) {

            var item = { id: selectedNode.id, pId: selectedNode.pId, name: selectedNode.name, cltRnk: selectedNode.cltRnk, ncbFlg: selectedNode.ncbFlg, rcdSts: selectedNode.rcdSts };
            if (selectedNode.isParent && selectedNode.children.length > 0) {
                var child = selectedNode.children;
                nodes.push(item);
                for (var i = 0; i < child.length; i++) {
                    getNodes(child[i]);
                }
            } else {
                nodes.push(item);
            }
        }
       
        //传递数组参数
        var array = JSON.stringify({ 'array': nodes });
        $.ajaxExtend({
            contentType: 'application/json; charset=utf-8',            url: clickUrl,
            data: array,
            type: "post",
            cache: false,
            success: function (result) {
                $("#" + targetDiv).html(result);
            }
        });


MVC3 controller:
        [HttpPost]
        public ActionResult GetClientInfo(List<ClientTreeItem> array)
        {

            var ret = new PagedList<ClientTreeItem>(array, 1, 30);
            return PartialView("~/Views/Client/_ClientInfo.cshtml", ret);
        }

其中黑体部分是需要注意的地方，否则不加上的话后台得到的是个空。

网上原文：

I'm trying to pass an array of objects into an MVC controller method using jQuery's ajax() function. When I get into the PassThing() C# controller method, the argument "things" is null. I've tried this using a type of List for the argument, but that doesn't work either. What am I doing wrong?

<script type="text/javascript">
    $(document).ready(function () {
        var things = [
            { id: 1, color: 'yellow' },
            { id: 2, color: 'blue' },
            { id: 3, color: 'red' }
        ];

        $.ajax({
            contentType: 'application/json; charset=utf-8',
            dataType: 'json',
            type: 'POST',
            url: '/Xhr/ThingController/PassThing',
            data: JSON.stringify(things)
        });
    });
</script>

public class ThingController : Controller
{
    public void PassThing(Thing[] things)
    {
        // do stuff with things here...
    }

    public class Thing
    {
        public int id { get; set; }
        public string color { get; set; }
    }
}
c# jquery asp.net-mvc jquery-ajax
share|improve this question edited Nov 6 '12 at 0:56

tereško
23.9k102972  asked Nov 6 '12 at 0:01

Halcyon
1,27821231 

  You can try JavaScriptSerializer.Deserialize Method (String, Type) – jk. Nov 6 '12 at 0:21
1    
Your data is a string, yet your method accepts an array. Change your method to accept a string, then deserialize it within the method. – Bob Horn Nov 6 '12 at 0:36
1    
Your code is correct. I tested it and it worked using MVC 4. Please provide more data to figure it out. – Diego Nov 6 '12 at 1:47

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2 Answers
active oldest votes
up vote 3 down vote accepted  Using NickW's suggestion, I was able to get this working using things = JSON.stringify({ 'things': things }); Here is the complete code.

$(document).ready(function () {
    var things = [
        { id: 1, color: 'yellow' },
        { id: 2, color: 'blue' },
        { id: 3, color: 'red' }
    ];     

    things = JSON.stringify({ 'things': things });

    $.ajax({
        contentType: 'application/json; charset=utf-8',
        dataType: 'json',
        type: 'POST',
        url: '/Home/PassThings',
        data: things,
        success: function () {         
            $('#result').html('"PassThings()" successfully called.');
        },
        failure: function (response) {         
            $('#result').html(response);
        }
    });
});


public void PassThings(List<Thing> things)
{
    var t = things;
}

public class Thing
{
    public int Id { get; set; }
    public string Color { get; set; }
}
There are two things I learned from this: 1) The contentType and dataType settings are absolutely necessary in the ajax() function. It won't work if they are missing. I found this out after much trial and error. 2) To pass in an array of objects to an MVC controller method, simply use the JSON.stringify({ 'things': things }) format.

I hope this helps someone else!