Line and Image Annotations Note Note Note : For an example procedure on how to create chart annotations, see Create Annotations. The following properties affect all Line and Image annotations: Height Width Image ImageFitStyle LineStyle LineThickness Location OffsetMode Offset
Linear and Logarithmic Axes Sometimes it is necessary to plot very disparate data side-by-side on the same scale. When plotting such data on a linear scale, the smaller values become invisible while the larger ones occupy the entire scale. In these cases, use a logarithmic, not a linear, numeric type for your axis...
Make a Specific Annotation Visible To change the visibility of an annotation, set its Visible property to True. In Visual Basic: In C#:
Map a Leaf Node’s Color to a Specific Column in a DataTable This topics explains how to map a leaf node’s color to a specific column in your data table. The ColorValueIndex property is the index of the data column which contains numeric values. If you do not set the ColorValueIndex, it defaults to the first numeri...
Modify Scene Graph Using FillSceneGraph Event This topic shows you how to add/remove primitives to/from the chart before the chart is rendered using the FillSceneGraph event. Using this event eliminates the need to create a custom layer class. Note Note This topic assumes that you already created a chart. For info...
Modify the Default Bubble Size You may sometimes require bubbles in a bubble chart to have smaller or larger radii than the chart renders them with originally. A common solution to this problem is to multiply (or divide), by a constant factor, the data values in the data column bound to a bubble chart’s ColumnZ , ...
Null Values Charts are often required to display sets of data which contain null values. Since null values in a data source can have different meanings, the Chart control provides a variety of ways to plot null values in a set. A common question that is asked when handling null values is: Where on the chart should...
Numeric, Set Label, and Date/Time Axes Each axis is either a numeric, set label, or date/time axis. A numeric axis is based on a numeric scale, which can be a linear or logarithmic scale. A SetLabelAxis object is a set of evenly-spaced data items, optionally grouped by series or row. A date/time axis is based on a...
Optimize the Rendering Speed The Chart control generally renders charts at an exceptional speed; however, users who are plotting a large number of points may want to set the Display property of the Tooltips object appropriately to optimize performance. Additionally, not generating image maps will assist the elemen...
Overview of Chart Data Requirements When you hook up actual data to the Chart control, there are a number of requirements that you need to keep in mind. To hook up actual data from a database or array, you can use the DataSource property, then call the DataBind method when the data is ready to be queried by the ch...