Javascript 按设置的间隔从现有数据表更新数据点
我想让HighChart通过向图表添加下一个数据点来更新系列,以便图表“播放”。 我有一个包含X和Y分量的数据系列。我想让图表随着本系列的下一点更新(比如说每秒钟更新一次)。 我正在使用DotNet.HighCharts API的VB.NET 4站点中使用此功能。我已经跟随了几个演示(比如一个),所有这些都使用了一些随机生成的值。如何让图表使用现有的一组点?下面是一个使用随机函数的JSFIDLE- 我只是不知道如何迭代传入的数据系列(如果是这样做的话),或者让DotNet.HighCharts为我迭代 用一些代码编辑:Javascript 按设置的间隔从现有数据表更新数据点,javascript,highcharts,Javascript,Highcharts,我想让HighChart通过向图表添加下一个数据点来更新系列,以便图表“播放”。 我有一个包含X和Y分量的数据系列。我想让图表随着本系列的下一点更新(比如说每秒钟更新一次)。 我正在使用DotNet.HighCharts API的VB.NET 4站点中使用此功能。我已经跟随了几个演示(比如一个),所有这些都使用了一些随机生成的值。如何让图表使用现有的一组点?下面是一个使用随机函数的JSFIDLE- 我只是不知道如何迭代传入的数据系列(如果是这样做的话),或者让DotNet.HighCharts为
Dim stfipsList4 = (From r In dt4.AsEnumerable() Select r("areaname")).Distinct().ToList()
Dim SeriesList4 As New List(Of Series)(stfipsList4.Count)
Dim seriesItem4(stfipsList4.Count) As Series
Dim xDate4 As DateTime
Dim fakeDate4 As String
Dim sX4 As Integer
sX4 = 1
For Each state In stfipsList4
Dim data As New Dictionary(Of DateTime, Decimal)
Dim stateVal As String = state.ToString
Dim recCount As Integer = dt4.Rows.Count - 1
Dim seriesPointCount As Integer = dt4.Compute("Count(population)", "areaname = '" + stateVal + "'")
Dim chartData As Object(,) = New Object(seriesPointCount - 1, 1) {}
Dim x As Integer = 0
For i As Integer = 0 To recCount
If dt4.Rows(i)("areaname").ToString = stateVal Then
fakeDate4 = "1/1/" + dt4.Rows(i)("periodyear").ToString
xDate3 = DateTime.Parse(fakeDate4)
chartData.SetValue(xDate4.Date, x, 0)
chartData.SetValue(dt4.Rows(i)("population"), x, 1)
x += 1
End If
Next
seriesItem4(sX4) = New Series With {
.Name = state.ToString, _
.Data = New Helpers.Data(chartData)
}
SeriesList4.Add(seriesItem3(sX4))
sX4 = sX4 + 1
Next
Dim iterateData As String = JsonSerializer.Serialize(New Helpers.Data(New Object() {seriesItem3(1).Data}))
Dim chart4 As Highcharts = New Highcharts("chart4").SetOptions(New Helpers.GlobalOptions() With { _
.[Global] = New [Global]() With { _
.UseUTC = False _
} _
}).InitChart(New Chart() With { _
.DefaultSeriesType = ChartTypes.Spline, _
.MarginRight = 10, _
.Events = New ChartEvents() With { _
.Load = "ChartEventsLoad" _
} _
}).SetTitle(New Title() With { _
.Text = "Live data" _
}).SetXAxis(New XAxis() With { _
.Type = AxisTypes.Datetime, _
.TickPixelInterval = 150 _
}).SetSeries(New Series() With { _
.Data = New Helpers.Data(New Object() {})
}) _
.AddJavascripVariable("counter", "0") _
.AddJavascripVariable("stockData", iterateData) _
.AddJavascripFunction("ChartEventsLoad", "// set up the updating of the chart each second" & vbCr & vbLf & _
" var series = this.series[0];" & vbCr & vbLf & _
" setInterval(function() {" & vbCr & vbLf & _
" var x = stockData[counter].key;" & vbCr & vbLf & _
" var y = stockData[counter].value;" & vbCr & vbLf & _
" series.addPoint([x, y], true, series.points.length > 10);" & vbCr & vbLf & _
" counter++;" & vbCr & vbLf & _
"}, 1000);")
这将传入我的数据系列(可以是1个或多个不同的单独系列)。我想做的是通过一次添加一个点来“播放”系列点(通过缩放x轴,但我不想删除任何点)。这个虚拟版本只是在给定时刻添加一个新的随机y值。我不知道如何迭代我现有的数据
这会将“stockData”javascript变量设置为我的数据集。我在FireBug中看到了这样的错误
stockData[计数器]未定义
var计数器
在$(文档).ready(函数)
以及stockdata
和chart4
图表中定义。有关DotNet.Highcharts API的内容,请参见。
迭代的内嵌javascript如下所示:
function ChartEventsLoad(){
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function() {
var x = stockData[counter].key;
var y = stockData[counter].value;
series.addPoint([x, y], true, series.points.length > 10);
counter++;
}, 1000);
}
});
我真正不确定的部分是stockData[计数器]
键/值。这在javascript中被称为什么?stockdata是一个数据列表,如下所示:
var stockData = { data: [{ data: [[Date.parse('01/01/1900 00:00:00'), 530000],
....,
[Date.parse('01/01/2010 00:00:00'), 18801310]]
}]
};
编辑v4:
好了,现在我可以用一些讨厌的javascript解析出我的数据数组了
Dim iterateData As String = JsonSerializer.Serialize(seriesItem3(1))
Dim chart4 As Highcharts = New Highcharts("chart4").SetOptions(New Helpers.GlobalOptions() With { _
.[Global] = New [Global]() With { _
.UseUTC = False _
} _
}).InitChart(New Chart() With { _
.DefaultSeriesType = ChartTypes.Spline, _
.MarginRight = 10, _
.Events = New ChartEvents() With { _
.Load = "ChartEventsLoad" _
} _
}).SetTitle(New Title() With { _
.Text = "Live data" _
}).SetXAxis(New XAxis() With { _
.Type = AxisTypes.Datetime, _
.TickPixelInterval = 150 _
}).SetSeries(New Series() With { _
.Data = New Helpers.Data(New Object() {})
}) _
.AddJavascripVariable("counter", "0") _
.AddJavascripVariable("stockData", iterateData.ToString) _
.AddJavascripFunction("ChartEventsLoad", "// set up the updating of the chart each second" & vbCr & vbLf & _
" var result = stockData.data;" & vbCr & vbLf & _
" var series = this.series[0];" & vbCr & vbLf & _
" setInterval(function() {" & vbCr & vbLf & _
" var p = String(result[counter]);" & vbCr & vbLf & _
" var splitp = p.split("","");" & vbCr & vbLf & _
" var x = splitp[0];" & vbCr & vbLf & _
" var y = splitp[1];" & vbCr & vbLf & _
" series.addPoint([x, y], true, false, true);" & vbCr & vbLf & _
" counter++;" & vbCr & vbLf & _
"}, 1000);")
ltrChart4.Text = chart4.ToHtmlString()
如果我查看firebug中的x和y值,我可以看到这些是预期值。但是,我的图表只是从1900小时开始在x轴上更新时间,并每秒添加一个点(根据javascript函数),但没有y值。此外,y轴似乎从-2.5开始-我使用的所有值都不小于1000,更不用说0了。我非常接近……您可以在
无论如何,下面是一个示例代码,说明在迭代数据时如何在图表中每秒添加点:
Highcharts chart = new Highcharts("chart")
.SetOptions(new GlobalOptions { Global = new Global { UseUTC = false } })
.InitChart(new Chart
{
DefaultSeriesType = ChartTypes.Spline,
MarginRight = 10,
Events = new ChartEvents
{
Load = "ChartEventsLoad"
}
})
.SetTitle(new Title { Text = "Live data" })
.SetXAxis(new XAxis
{
Type = AxisTypes.Datetime,
TickPixelInterval = 150
})
.SetSeries(new Series
{
Name = "Live data",
Data = new Data(new[] { new Point { X = Tools.GetTotalMilliseconds(DateTime.Now), Y = 0 } })
})
.AddJavascripVariable("counter", "0")
.AddJavascripVariable("stockData", JsonSerializer.Serialize(ChartsData.StockData))
.AddJavascripFunction("ChartEventsLoad",
@"// set up the updating of the chart each second
var series = this.series[0];
setInterval(function() {
var x = (new Date()).getTime(); // current time
var y = stockData[counter];
series.addPoint([x, y], true, series.points.length > 10);
counter++;
}, 1000);");
对不起,C#代码。我希望这对您有所帮助,您可以找到好的转换器。终于可以使用了。这是我的解决方案-可能不是最漂亮的,但它是有效的。 重要的一点是传递
iterated
的iterateData.ToString()
。从这一点开始,您可以在该点上循环,然后在每个元素上拆分。我添加了一个检查,以确保在到达数据集中的最后一个点时,点的添加停止。要做的仍然是允许它处理多个系列并“播放”它们
Dim stfipsList4 = (From r In dt4.AsEnumerable() Select r("areaname")).Distinct().ToList()
Dim SeriesList4 As New List(Of Series)(stfipsList4.Count)
Dim seriesItem4(stfipsList4.Count) As Series
Dim xDate4 As DateTime
Dim fakeDate4 As String
Dim sX4 As Integer
sX4 = 1
For Each state In stfipsList4
Dim data As New Dictionary(Of DateTime, Decimal)
Dim stateVal As String = state.ToString
Dim recCount As Integer = dt4.Rows.Count - 1
Dim seriesPointCount As Integer = dt4.Compute("Count(population)", "areaname = '" + stateVal + "'")
Dim chartData As Object(,) = New Object(seriesPointCount - 1, 1) {}
Dim x As Integer = 0
For i As Integer = 0 To recCount
If dt4.Rows(i)("areaname").ToString = stateVal Then
fakeDate4 = "1/1/" + dt4.Rows(i)("periodyear").ToString
xDate3 = DateTime.Parse(fakeDate4)
chartData.SetValue(xDate4.Date, x, 0)
chartData.SetValue(dt4.Rows(i)("population"), x, 1)
x += 1
End If
Next
seriesItem4(sX4) = New Series With {
.Name = state.ToString, _
.Data = New Helpers.Data(chartData)
}
SeriesList4.Add(seriesItem3(sX4))
sX4 = sX4 + 1
Next
Dim iterateData As String = JsonSerializer.Serialize(seriesItem3(1))
Dim chart4 As Highcharts = New Highcharts("chart4").SetOptions(New Helpers.GlobalOptions() With { _
.[Global] = New [Global]() With { _
.UseUTC = False _
} _
}).InitChart(New Chart() With { _
.DefaultSeriesType = ChartTypes.Column, _
.MarginRight = 10, _
.Events = New ChartEvents() With { _
.Load = "ChartEventsLoad" _
} _
}).SetTitle(New Title() With { _
.Text = "Live data" _
}).SetXAxis(New XAxis() With { _
.Type = AxisTypes.Datetime, _
.TickPixelInterval = 150 _
}).SetSeries(New Series() With { _
.Data = New Helpers.Data(New Object() {}), _
.Name = seriesItem3(1).Name
}) _
.AddJavascripVariable("iterated", iterateData.ToString) _
.AddJavascripFunction("ChartEventsLoad", "// set up the updating of the chart each second" & vbCr & vbLf & _
" var result = iterated.data;" & vbCr & vbLf & _
" var counter = 0;" & vbCr & vbLf & _
" var series = this.series[0];" & vbCr & vbLf & _
" var loopseries = function() {" & vbCr & vbLf & _
" if (counter <= result.length) {" & vbCr & vbLf & _
" var p = String(result[counter]);" & vbCr & vbLf & _
" var splitp = p.split("","");" & vbCr & vbLf & _
" var x = Number(splitp[0]);" & vbCr & vbLf & _
" var y = Number(splitp[1]);" & vbCr & vbLf & _
" series.addPoint([x, y], true, series.points.length > 10, true);" & vbCr & vbLf & _
" counter++;" & vbCr & vbLf & _
" } else {" & vbCr & vbLf & _
" clearInterval(loopseries);" & vbCr & vbLf & _
" }};" & vbCr & vbLf & _
" setInterval(loopseries, 100);")
ltrChart4.Text = chart4.ToHtmlString()
Dim stfipsList4=(从dt4.AsEnumerable()中的r选择r(“区域名称”)).Distinct().ToList()
Dim系列列表4作为新列表(系列)(stfipsList4.Count)
Dim系列项目4(stfipsList4.Count)作为系列
Dim xDate4作为日期时间
Dim fakeDate4作为字符串
作为整数的Dim sX4
sX4=1
对于stfipsList4中的每个状态
作为新字典的Dim数据(日期时间,十进制)
Dim stateVal As String=state.ToString
Dim recCount As Integer=dt4.Rows.Count-1
Dim seriesPointCount As Integer=dt4.Compute(“计数(总体)”,“区域名称=”+“状态值+”))
Dim chartData作为对象(,)=新对象(seriesPointCount-1,1){
尺寸x为整数=0
对于i作为整数=0进行重新计数
如果dt4.Rows(i)(“areaname”).ToString=stateVal,则
fakeDate4=“1/1/”+dt4.行(i)(“周期年”)。ToString
xDate3=DateTime.Parse(fakeDate4)
chartData.SetValue(xDate4.Date,x,0)
chartData.SetValue(dt4.行(i)(“总体”),x,1)
x+=1
如果结束
下一个
SerieItem4(sX4)=具有{
.Name=state.ToString_
.Data=新的助手.Data(图表数据)
}
SeriesList4.Add(seriesItem3(sX4))
sX4=sX4+1
下一个
Dim iterateData As String=JsonSerializer.Serialize(seriesItem3(1))
Dim chart4 As Highcharts=新的Highcharts(“chart4”).SetOptions(带{_
[Global]=带有{_
.UseUTC=False_
} _
}).InitChart(带有{_
.DefaultSeriesType=ChartTypes.Column_
.MarginRight=10_
.Events=带有{_
.Load=“ChartEventsLoad”_
} _
}).SetTitle(带有{_
.Text=“实时数据”_
}).SetXAxis(带{_
.Type=AxisTypes.Datetime_
.TickPixelInterval=150_
}).SetSeries(带{_
.Data=新的Helpers.Data(新对象(){})_
.Name=系列项目3(1).Name
}) _
.AddJavascripVariable(“迭代的”,iterateData.ToString)_
.AddJavascripFunction(“ChartEventsLoad”,“//设置每秒更新图表”&vbCr&vbLf&_
“var result=iterated.data;”&vbCr&vbLf&_
“var计数器=0;”&vbCr&vbLf&_
“var系列=此.series[0];”&vbCr&vbLf&_
“var loopseries=function(){”&vbCr&vbLf&_
“如果(计数器10,真);”&vbCr&vbLf&_
“计数器++;”&vbCr&vbLf&_
}else{&vbCr&vbLf&_
“clearInterval(loopseries);”&vbCr&vbLf&_
“}};”&vbCr&vbLf&_
“设定间隔(