Dundas Chart for ASP.NET
Using Keywords
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Using Dundas Chart > Series > Using Keywords



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Overview

A Keyword is a specially formatted character sequence that gets replaced by an associated Chart Series value, or calculated value. Simply put, Keywords are words that can be used to replace some type of data within a chart element. Using Keywords gives you the added flexibility to assign custom values to labels for chart series, data points, and legend items.

 

Design-Time Keywords Editor

To simplify the process of using keywords, all properties that use keywords can be formatted at design-time using the String Keywords Editor  shown in Figure 1 below. This editor is accessible through the Property window.

 

Figure 1: The String Keyword Editor can be used to create or edit your keywords. 

 

To insert a new keyword, click the Insert New Keyword button to bring up the Keyword Editor. To edit an existing keyword that is shown in the String Keyword Editor, select the keyword, and click the Edit Keyword button.

Formatting Strings

The Keyword Editor is where you specify your formatting particulars. For example, when you set the Format option to Percent for the first Y value, the resulting keyword produced is "#VALY{P}".  You can also apply format strings in code-behind using the same nomenclature, you do this by following the keyword with a format specifier enclosed in braces.  For information concerning the types of formatting that can be used, see the Standard Numeric Format Strings topic in the MSDN library.

 

Using Keywords

The following table provides a list of supported keywords.

Keyword

Replaced By

Applicable To

Supports Multiple

Y Values

#VALX

 X value of the data point.

 Data points only.

#VAL, #VALY,
#VALY2, #VALY3, ...

 Y values of the data point.

 Data points only.

#SERIESNAME  

 Series name.

 Data points and series. -

#LABEL  

 Data point label.

 Data points only. -

#AXISLABEL 

  Axis data point label. Data points only. -

#INDEX  

 Data point index.

 Data points only. -

#PERCENT

 Percentage of the data point Y value.

 Data points only.

#TOTAL  

 Total of all Y values in the series.

 Series only.

#LEGENDTEXT 

 Legend text.

 Legend only. -

#AVG

  Average of all Y values in the series. Series only.

#MIN

  Minimum data point of all Y values in the series. Series only.

#MAX

  Maximum data point of all Y values in the series. Series only.

#FIRST

  First data point of all Y values in the series. Series only.

#LAST

  Last data point of all Y values in the series. Series only.

 

For chart types that support multiple Y values, you can specify the index of the Y value that the keyword applies to. For example, when a bubble chart is used, the keyword #TOTALY2 specifies the total of all Y2 values in the series.

Example

This example demonstrates how to use keywords to set series point labels. 

Visual Basic Copy Code 
Imports Dundas.Charting.WebControl
  ...
  
' Set series point labels. On the first line we display the first
' Y value, on the second line we display the X value.
Chart1.Series("Series1").Label = "Y = #VALY" + ControlChars.Lf + "X = #VALX"
C# Copy Code 
using Dundas.Charting.WebControl;
  ...
  
// Set series point labels. On the first line we display the first
// Y value, on the second line we display the X value.
Chart1.Series["Series1"].Label = "Y = #VALY\nX = #VALX";

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