我有一个序列化的 json 数组,我如何在 javascript 中访问它。
我正在使用 javascript
amcharts 并想将
vb.net` 数组传递给 javascript 图表。
代码如下:
VB
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
DataSetToJSON()
End Sub
Public Function SelectChartData(ByVal Name As String) As DataSet
Dim sqlCmd As New SqlCommand
Dim myData As New DataSet
sqlCmd.CommandTimeout = 1200
sqlCmd.CommandType = CommandType.StoredProcedure
sqlCmd.CommandText = "SelectAmChartdata"
sqlCmd.Parameters.Add("@Name", SqlDbType.VarChar)
sqlCmd.Parameters("@Name").Value = Name
Dim da As New dsSV1TableAdapters.tblGeneralTableAdapter
da.Adapter.SelectCommand = sqlCmd
sqlCmd.Connection = da.Connection
sqlCmd.Connection.Open()
da.Adapter.Fill(myData)
sqlCmd.Dispose()
sqlCmd = Nothing
da.Connection.Close()
da.Connection.Dispose()
da.Connection = Nothing
Return myData
End Function
Public Function DataSetToJSON()
Dim dt As DataTable
ds = SelectChartData("Weather")
Dim dict As New Dictionary(Of String, Object)
For Each dt In ds.Tables
Dim arr(dt.Rows.Count) As Object
For i As Integer = 0 To dt.Rows.Count - 1
arr(i) = dt.Rows(i).ItemArray
Next
dict.Add(dt.TableName, arr)
Next
Dim json As New JavaScriptSerializer
Return json.Serialize(dict)
End Function
ASPX
<script type="text/javascript">
//var chartData = **Access Serverside Array**
window.onload = function () {
var chart = new AmCharts.AmSerialChart();
chart.dataProvider = chartData;
chart.categoryField = "country";
chart.marginTop = 15;
chart.marginLeft = 55;
chart.marginRight = 15;
chart.marginBottom = 80;
chart.angle = 30;
chart.depth3D = 15;
var catAxis = chart.categoryAxis;
catAxis.gridCount = chartData.length;
catAxis.labelRotation = 90;
var graph = new AmCharts.AmGraph();
graph.balloonText = "[[category]]: [[value]]";
graph.valueField = "visits"
graph.type = "column";
graph.lineAlpha = 0;
graph.fillAlphas = 0.8;
chart.addGraph(graph);
chart.write('chartContainer');
}
</script
最佳答案
您可以将序列化数据直接转储到 ASPX 页面中:
<script type="text/javascript">
var my_data = <%= DataSetToJSON() %>;
</script>
或者您可以在 ASPX 页面中使用:
<input type="hidden" id="my_data" clientidmode="static" runat="server" value="" />
在代码隐藏中:
my_data.Value = DataSetToJSON();
然后您可以使用 document.getElementById('my_id').value
提取数据,使用 JSON.parse
之类的方法对其进行解码,然后将其传递给您的图表。
关于javascript - 在 Javascript 中访问 JavaScriptSerializer,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13451027/