求助：PowerChart Y轴显示科学计数法，需改为十进制格式

The issue here is that when dealing with very small values (like your 5e-7 range), the Chart control defaults to scientific notation for Y-axis labels. To force decimal format, you just need to explicitly set the LabelStyle.Format property of the Y-axis to a fixed-point format with enough precision to display your values clearly.

Here's how to modify your code:

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

# Assuming you've already initialized your chart and series
# Add data points to the series
foreach ($city in $datasource.Keys) {
    $chart1.Series["Price"].Points.AddXY($city, $datasource[$city])
}

# Configure Y-axis to use decimal format
$chartArea = $chart1.ChartAreas[0]
# Use "F9" for fixed-point notation with 9 decimal places (matches your data's precision)
$chartArea.AxisY.LabelStyle.Format = "F9"
# Optional: Prevent auto-scaling from overriding your format (if needed)
$chartArea.AxisY.LabelStyle.IsLabelAutoFit = $false

Explanation: #

• "F9" Format Specifier: This tells the chart to display numbers in fixed-point notation with exactly 9 digits after the decimal point. Since your values are around 0.0000005xx, this will show them as full decimals (e.g., 0.000000512) instead of scientific notation (5.12E-07).
• If you want more or fewer decimal places, just adjust the number in the format string (e.g., "F8" for 8 decimals, "F10" for 10).
• The IsLabelAutoFit setting ensures the chart doesn't automatically switch back to scientific notation if it thinks the labels are too crowded—though in your case with 5 data points, this might not be strictly necessary, but it's a safe addition.

内容的提问来源于stack exchange，提问作者Lostkauz