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The ColorScale3 data visualization displays a TextBox background color in a range of colors to indicate minimum, middle, and maximum values, and all shades in between.

Parameters

• Value.  This is the field value in the report to be evaluated. The data type is Single.
• Minimum. If the Value evaluates to this number, the StartColor is rendered.
• Middle. If the Value evaluates to this number, the MiddleColor is rendered.
• Maximum. If the Value evaluates to this number, the EndColor is rendered.
• StartColor. The HTML color string to use if the Value evaluates to the Minimum value.
• MiddleColor. The HTML color string to use if the Value evaluates to the Middlevalue.
• EndColor. The HTML color string to use if the Value evaluates to the Maximum value.

You can use static values or aggregate functions (e.g. Min, Avg, or Max) to set the Minimum, Middle, and Maximum parameters. For more information on these and other aggregate functions, see the Common Functions topic.

Syntax

=ColorScale3(Value, Minimum, Middle, Maximum, StartColor, MiddleColor, EndColor)

Usage

Use an expression with this syntax in the BackgroundColor property of a Textbox control. This causes the background color to change depending on the value of the field you specified in the Value parameter, in the case of the example, InStock. Any values falling between the Minimum value and the Middle value render with a gradient scale color between the StartColor and MiddleColor. The closer the value is to the Minimum, the closer to Crimson the color renders. In the same way, values falling between the Middle and Maximum render with a color between the MiddleColor and EndColor, in this case, varying shades of yellow-green.

Example

=ColorScale3(Fields!InStock.Value,0,10,20,"Crimson","Yellow","MidnightBlue")

Default Behavior

Dialog

When you select a TextBox control on your report, in the Properties window or Properties dialog, you can drop down the BackGroundColor property and select <Data Visualizer...> to launch the dialog. To build the data visualizer expression, select the appropriate values for each of the options in the dialog.

Note: If you clear the Use a middle color check box, the expression used in the BackgroundColor property changes to ColorScale2. For more information, see ColorScale2.