c# - 将值从 aspx 传递给 javascript

Question

我有一组地址，我用来加载到地图上，

我使用 HiddenField 将这些地址从 cs 文件加载到 javascript

//  In code behind   
string []arr=new string[]
{
"51.482238,0.001581",
"51.473364,0.011966","51.471974,-0.000651",
"51.472108,-0.002196","51.474995,-0.003827",
"51.476492,-0.005629","51.477855,-0.006058",
"51.478443,-0.007045","51.479298,-0.007861",
"51.481202,-0.002136","51.481577,-0.0022"
};

    for ( int j = 0; j < arr.Length ; j++ )
    {
        HiddenField1.Value += arr[j] + ":";
    }
}

//in javascript

var hidValue= document.getElementById("<%=HiddenField1.ClientID%>").value;

var latlonArr = hidValue.split(':');
for (var i = 0; i < latlonArr.length - 1; i++) 
    {
        //alert("item :"+ i + " : "+latlonArr[i]);
        var latlonA = latlonArr[i].split(',');
        var latlon = new google.maps.LatLng(latlonA[0],latlonA[1]);
        arrCoords.push(latlon);
    }

所以，现在如果我有更多没有。地址，对于从 100 到 1000 或更多的地址，可以使用 HiddenField 吗？

Answer 1

使用您可能拥有的最大地址数检查性能，如果性能还可以，那么您应该没问题。如果性能不好，则考虑异步获取地址，例如一次 100 个。

Answer 2

在代码隐藏中，您可以使用：

string []arr=new string[]
{
   "51.482238,0.001581",
   "51.473364,0.011966","51.471974,-0.000651",
   "51.472108,-0.002196","51.474995,-0.003827",
   "51.476492,-0.005629","51.477855,-0.006058",
   "51.478443,-0.007045","51.479298,-0.007861",
   "51.481202,-0.002136","51.481577,-0.0022"
};
HiddenField1.Value = arr.join(",");