UltraChart.Axis.Y.Labels.ItemFormatString = "<DATA_VALUE:##.##>"
This topic discusses useful information that will help you to ensure that your data is rendered properly in the 2D line chart.
While the Chart control allows you to easily point the chart to your own custom data, it is important that you are supplying the appropriate amount and type of data that the chart requires. If the data does not meet the minimum requirements based on the type of chart that you are using, an error will be generated.
The following is a list of data requirements for 2D line charts:
The data set contains one or more numeric columns. Note that it is recommended that the data set contains two or more numeric columns so that each line can have two or more points.
If you are binding the 2D line chart to a series object, see Requirements for Series Binding for information on the series binding requirements.
If you are using the 2D line chart in a Composite chart, see Axis Requirements for Composite Charts for information on the axis requirements for the chart.
The chart data is rendered using the following rules:
Each row is drawn as a single line (or area) on the chart, with a number of points in the line equal to the count of numeric columns in the data set.
Every numeric column is displayed in the chart. The first numeric column encountered in the data will be used for the value of the first point, the second column for the second point, and so on. Note that a numeric column is any column that contains only values that can be interpreted as numbers.
The data points along the line graph are connected by line segments, and represent adjacent columns within a given row (in the order in which they are projected).
The x-axis (or horizontal axis) is a SetLabelAxis object, with the points evenly spaced apart for each item (point). The y-axis, or vertical axis, is the numeric axis. Labels on the y-axis can be formatted using the FormatString property and a "numeric format":
UltraChart.Axis.Y.Labels.ItemFormatString = "<DATA_VALUE:##.##>"
The first string column encountered in the data will be used for row labels.
You can select an alternate column to be used for row labels, and toggle between the primary and secondary labels.
You can include or exclude any column from the chart using the UltraChart.Data. IncludeColumn method.
See below for an example data set, along with the rendered 2D line chart.
