PRB: Invalid Data Type for This Property Error

Last reviewed: April 30, 1996
Article ID: Q128156

The information in this article applies to:

Microsoft Visual FoxPro for Windows version 3.0

SYMPTOMS

Under program control, the 'Invalid Data Type for This Property' error is returned when an object is instantiated or a form is executed.

CAUSE

The value entered for the property is of the wrong type. This error is likely to occur with properties that evaluate data. For example, the CONTROLSOURCE property specifies the source of data for a control. The control being defined determines what type of data can be used. However, the CONTROLSOURCE property only accepts character strings. For example,

   This.ControlSource= RECNO()  && Returns the "Invalid Data Type" error
   This.ControlSource="RECNO()" && Correct setting for this property

WORKAROUND

Ensure that you are using the correct type for the expression you enter.

STATUS

This behavior is by design.

MORE INFORMATION

The following is a partial list of properties that accept character data that may evaluate to another type. For more information, please refer to the FoxPro Help menu.

- Properties of a Grid:

  RelationalExpr

- Properties of a column:

  ControlSource
  DynamicAlignement
  DynamicBackColor
  DynamicForeColor

  For example, enter:

  Grid1.Column1.DynamicBackColor="IIF(<expL>,RGB(255,0,0),RGB(0,255,0))"

- Properties of a combo box or a list box:

  RowSource
  ColumnWidths

  For example, type:

  cboName.ColumnCount=3
  cboName.ColumnWidths="25,25,25"

Additional reference words: 3.00 VFoxWin
KBCategory: kbprg kberrmsg
KBSubcategory: FxprgClassoop

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Last reviewed: April 30, 1996
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