c# - 使用 jquery DataTable 的 fnServerParams 和 aoData 向服务器发送数据在 MVC4 中不起作用

Question

我想将额外的数据发送到服务器端(ASP.Net MVC4)以获取我的 jquery 数据表。有很多关于如何在客户端工作的示例，但我无法让它在服务器端工作。

代码如下:

JavaScript:

$(document).ready(function () {    
    var oTable = $('#myDataTable').dataTable({
        "bServerSide": true,
        "sAjaxSource": "SearchPatient/DataHandler",        
        "fnServerParams": function (aoData) {
            alert('in fnServerParams');
            aoData.push( { "name": "more_data", "value": "my_value" } );
        }

    });
});

注意:警报响起，因此该功能本身正在运行。

我的模型类:

    /// <summary>
    /// Class that encapsulates most common parameters sent by DataTables plugin
    /// </summary>
    public class JQueryDataTableParamModel
    {
        /// <summary>
        /// fnServerparams, this should be an array of objects?
        /// </summary>        
        public object[] aoData { get; set; }

        /// <summary>
        /// Request sequence number sent by DataTable, same value must be returned in response
        /// </summary>       
        public string sEcho { get; set; }

        /// <summary>
        /// Text used for filtering
        /// </summary>
        public string sSearch { get; set; }

        /// <summary>
        /// Number of records that should be shown in table
        /// </summary>
        public int iDisplayLength { get; set; }

        /// <summary>
        /// First record that should be shown(used for paging)
        /// </summary>
        public int iDisplayStart { get; set; }

        /// <summary>
        /// Number of columns in table
        /// </summary>
        public int iColumns { get; set; }

        /// <summary>
        /// Number of columns that are used in sorting
        /// </summary>
        public int iSortingCols { get; set; }

        /// <summary>
        /// Comma separated list of column names
        /// </summary>
        public string sColumns { get; set; }

        /// <summary>
        /// Text used for filtering
        /// </summary>
        public string oSearch { get; set; }

    }

最后是我的 Controller :

   public ActionResult DataHandler(JQueryDataTableParamModel param)
    {
        if (param.aoData != null)
        {
            // Get first element of aoData.  NOT working, always null              
            string lSearchValue = param.aoData[0].ToString();

            // Process search value
            // ....
        }


        return Json(new
        {                
            sEcho = param.sEcho,
            iTotalRecords = 97,
            iTotalDisplayRecords = 3,
            aaData = new List<string[]>() {
                new string[] {"1", "IE", "Redmond", "USA", "NL"},
                new string[] {"2", "Google", "Mountain View", "USA", "NL"},
                new string[] {"3", "Gowi", "Pancevo", "Serbia", "NL"}
                }
        },
        JsonRequestBehavior.AllowGet);
    }

注意:操作处理程序被命中，因此获取数据的 ajax 调用也正常工作，并且我的数据表填充了 3 行..

问题是:aoData 始终为空。我希望第一个元素包含“my_value”。

非常感谢任何帮助!

Answer 1

经过几个小时的寻找答案终于发布在这里。只需几分钟即可得出答案:

这可以解决问题:

在服务器端的 DataHandler 中添加此行:

var wantedValue = Request["more_data"];

因此该值位于请求中而不是模型中。

谢谢。