Question

寻求一些帮助。

当我使用System.Windows.Forms.DataVisualization.Charting.Chart绘制图表时 Y轴用科学记数法格式化 - 假设为我想要的小数。我有一个简单的数据集包含在一个$ hashtable中。

    # data source
       $datasource = @{London = 0.000000512; Berlin = 0.000000520; Madrid = 0.000000519; Rome = 0.000000518; Paris = 0.000000503}

    foreach ($h in $datasource.Keys) 
        {
        echo ( "${h} $([decimal]$datasource.Item($h))"  )
        $chart1.Series["Price"].Points.addxy( $h ,[decimal]$datasource.Item($h))   
        }

生成图表时，Y轴如下所示：

Chart snippet

这些值以正确的格式写入控制台，如何将它们添加到图表系列中作为Decimal / Prevent系列以科学计数法显示它们？

提前致谢。

Answer 1

您可以使用custom numeric format string作为Y轴，如下所示：

$chartarea.AxisY.LabelStyle.Format = "##.###############";

以下是更完整的示例：

Add-Type -AssemblyName System.Windows.Forms 
Add-Type -AssemblyName System.Windows.Forms.DataVisualization 
$chart1 = New-object System.Windows.Forms.DataVisualization.Charting.Chart 

$chart1.Width = 400
$chart1.Height = 400

$chartarea = New-Object System.Windows.Forms.DataVisualization.Charting.ChartArea
$chartarea.AxisY.LabelStyle.Format = "##.###############";
$chartarea.AxisY.Minimum = 0.0000005
$chartarea.AxisY.Maximum = 0.00000052

$chart1.ChartAreas.Add($chartarea) 

$chart1.Titles.Add("The Price") | Out-Null
$chart1.Series.Add("Price") | Out-Null 
$chart1.Series[0].ChartType = [System.Windows.Forms.DataVisualization.Charting.SeriesChartType]::Line
$chart1.Series[0].YValueType = [System.Windows.Forms.DataVisualization.Charting.ChartValueType]::Double

# data source
$datasource = @{London = 0.000000512; Berlin = 0.000000520; Madrid = 0.000000519; Rome = 0.000000518; Paris = 0.000000503}

foreach ($h in $datasource.Keys) 
{
    echo ( "${h} $([decimal]$datasource.Item($h))"  )
    $chart1.Series["Price"].Points.addxy( $h ,[decimal]$datasource.Item($h))   
}

$chart1.Anchor = [System.Windows.Forms.AnchorStyles]::Bottom -bor `
    [System.Windows.Forms.AnchorStyles]::Left -bor `
    [System.Windows.Forms.AnchorStyles]::Right -bor `
    [System.Windows.Forms.AnchorStyles]::Top 

$form = New-Object Windows.Forms.Form
$form.Width = 450
$form.Height = 450
$form.Controls.Add($chart1)
$form.ShowDialog()

Powershell Chart Axis数据类型问题

1 个答案: