property Column.ComputedField as String

Retrieves or sets a value that indicates the formula of the computed column.

Type | Description | |||

String | A String expression that indicates the formula to compute the field/cell. The formula is applied to all cells in the column with the CellCaptionFormat property on exText ( the exText value is by default ). |

A computed field or cell displays the result of an
arithmetic formula that may include operators, variables and constants. By
default, the ComputedField property is empty. If the the ComputedField
property is empty, the property have no effect. If the ComputedField property
is not empty, all cells in the column, that have the CellCaptionFormat
property on exText, uses the same formula to display their content. For
instance, you can use the CellCaptionFormat property on exHTML, for cells in
the column, that need to display other things than column's formula, or you
can use the CellCaptionFormat property on exComputedField, to change the
formula for a particular cell. Use the CellCaptionFormat property to change the type for a particular
cell. Use the CellCaption property to
specify the cell's content. For instance, if the CellCaptionFormat property is
exComputedField, the Caption property indicates the formula to compute the
cell's content. The Def(exCellCaptionFormat) property is
changed to exComputedField, each time the ComputeField property is changed to
a not empty value. If the ComputedField property is set to an empty string,
the Def(exCellCaptionFormat) property is set to
exText. Call the Refresh method to force
refreshing the control.

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*The expression supports cell's identifiers as follows:*

**%0**,**%1**,**%2**,

This property/method supports predefined constants and operators/functions as described here.

Samples:

- "
**1**", the cell displays 1 - "
**%0 + %1**", the cell displays the sum between cells in the first and second columns. - "
**%0 + %1 - %2**", the cell displays the sum between cells in the first and second columns minus the third column. - "
**(%0 + %1)*0.19**", the cell displays the sum between cells in the first and second columns multiplied with 0.19. - "
**(%0 + %1 + %2)/3**", the cell displays the arithmetic average for the first three columns. - "
**%0 + %1 < %2 + %3**", displays 1 if the sum between cells in the first two columns is less than the sum of third and forth columns. - "
**proper(%0)**'" formats the cells by capitalizing first letter in each word - "
**currency(%1)**'" displays the second column as currency using the format in the control panel for money - "
**int(date(%1)-date(%2)) + " D " + round(24*(date(%1)-date(%2) - floor(date(%1)-date(%2)))) + "H"**'" displays interval between two dates in days and hours

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