利用ViewData生成JavaScript数组

   这次用JSCharts做报表，发现对于生成报表参数很是恼火，它有两种参数：

   一是Line：var myData = new Array([10, 20], [15, 10], [20, 30], [25, 10], [30, 5]);

   二是Bar：var myData = new Array(['unit', 20], ['unit two', 10], ['unit three', 30], ['other unit', 10], ['last unit', 30]);

   如何将Controller中获得的数据生成JavaScript的数组呢？

   一种是toJson的方法：

        public static string ToJSON(this object obj)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            return serializer.Serialize(obj);
        }

        public static string ToJSON(object obj, int recursionDepth)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            serializer.RecursionLimit = recursionDepth;
            return serializer.Serialize(obj);
        }

 var data=new Array();
        $(document).ready(function(){
        var content=<%=ViewData["Schedules"]==null?0:ViewData["Schedules"] %>;
        if(content!=0)
        {
            $.each(content, function(i, item) {
            data.push(new Array(item["ItemA"],item["ItemB"],item["ItemC"]));           
            });         
        }
        }); 

   参考：http://www.soaspx.com/dotnet/asp.net/DPattern/dpattern_20091104_1419.html
   

另一种是foreach ViewData，我选的这种：

  

public class Address
{
    public string Line1 { get; set; }
    public string City { get; set; }
}

// in your controller code
ViewData["Addresses"] = new List<Address>(new Address[] { new Address() { Line1="bla", City="somewhere"}, new Address() {Line1="foo", City="somewhereelse"}});

   前台：

<script type="text/javascript">
var addresses = new Array(
<% for (int i = 0; i < ViewData["Addresses"].Count; i++) { %>
<%= i > 0 : "," : "" %>({line1:"<%= addr.Line1 %>", city:"<%= addr.City %>"})
<% } %>);
</script>   

还可以这样：

var cityList = new Array();
function addCity(cityId, cityName) {
    var city = new Object();
    city.CityID = cityId;
    city.CityName = cityName

    cityList .push(city);
}
<% foreach (Something.DB.City item in ViewData["Cities"] as List<City>)
   { %>
   addCity(item.Id, item.Name);
<% } %>

   有几点需要注意，我的代码如下：

  var callin = new Array();
    function addReport( callin, callout) {
        var data = new Array(callin, callout);
        array.push(data);
    }
    '<%foreach(var item in ViewData["reports"] as List<CDRDayReport>){ %>'
    addReport('<%=item.CallIn %>','<%=item.CallOut %>'); //string
    //addReport(<%=item.CallIn %>,<%=item.CallOut %>);   //number
     '<%} %>'

   PS:JSCharts的需要的参数，是数组嵌套数组。开始我一直没弄明白怎么生成这样的数据，其实很简单：

 var array = new Array();
         var data = new Array(10, 2);
         var data2 = new Array(12, 3);
         array.push(data);
         array.push(data2);

   唯一需要注意的是，如果只有1个data，JSCharts会报错，因为一个点生成不了line嘛，后来才想通。