/// <summary>
/// Adds the label templates to the chart definition
/// </summary>
/// <param name="xAxisLabelTemplate">The x-axis label template</param>
/// <param name="yAxisInterval">The y-axis interval</param>
/// <returns>The updated chart definition</returns>
public ChartDefinition WithLabelTemplates
(
ChartAxisLabel xAxisLabelTemplate,
double?yAxisInterval = null
)
{
Validate.IsNotNull(xAxisLabelTemplate);
if (yAxisInterval < 1)
{
throw new ArgumentException
(
"The y-axis interval must be greater than zero."
);
}
this.XAxisLabelTemplate = xAxisLabelTemplate;
this.YAxisInterval = yAxisInterval;
return(this);
}
/// <summary>
/// Generates a chart axis label using a value and template
/// </summary>
/// <param name="value">The axis value</param>
/// <param name="rowNumber">The query row number</param>
/// <param name="template">The label template (optional)</param>
/// <returns>The label generated</returns>
private ChartAxisLabel GenerateLabel
(
object value,
int rowNumber,
ChartAxisLabel template = null
)
{
if (template == null)
{
if (value == null)
{
return(new ChartAxisLabel(rowNumber));
}
else
{
var valueType = value.GetType();
if (valueType.IsNumeric())
{
return(new ChartAxisLabel
(
Convert.ToDouble(value)
));
}
else if (valueType == typeof(DateTime) || valueType == typeof(DateTime?))
{
return(new ChartAxisLabel
(
(DateTime)value
));
}
else
{
return(new ChartAxisLabel
(
value.ToString()
));
}
}
}
else
{
if (value == null)
{
return(template);
}
else
{
var valueType = value.GetType();
var label = template.Clone();
switch (template.ValueType)
{
case ChartValueType.Double:
if (false == valueType.IsNumeric())
{
throw new InvalidCastException
(
$"The value '{value}' is not numeric."
);
}
label.DoubleValue = Convert.ToDouble
(
value
);
break;
case ChartValueType.DateTime:
if (valueType != typeof(DateTime) && valueType != typeof(DateTime?))
{
throw new InvalidCastException
(
$"The value '{value}' is not a valid date."
);
}
label.DateValue = (DateTime)value;
break;
default:
label.CustomText = value.ToString();
break;
}
return(label);
}
}
}