FOR EACH ... ENDFOR Command

Cikk
11/14/2006

Executes a set of commands for each element in a Visual FoxPro array or collection.

FOR EACH Var IN Group
   Commands
   [EXIT]
   [LOOP]
ENDFOR | NEXT [Var]

Property Values

Var
A variable or array element used to iterate through the elements of Group.
Group
A Visual FoxPro array, an OLE array, a Visual FoxPro collection, or an OLE collection.
Commands
Specifies the Visual FoxPro commands to be executed for each element in Group. Commands can include any number of commands.
EXIT
Transfers control from within the FOR EACH ... ENDFOR loop to the command immediately following ENDFOR. You can place EXIT anywhere between FOR EACH and ENDFOR.
LOOP
Returns control directly back to the FOR EACH clause without executing the statements between LOOP and ENDFOR. LOOP can be placed anywhere between FOR EACH and ENDFOR.

Examples

The following examples demonstrate how FOR EACH is used to enumerate elements in a Visual FoxPro array, an OLE array, and a set command buttons assigned to an object array.

In the following example, a Visual FoxPro variable array is created and FOR EACH is used to display the contents of each element in the array.

DIMENSION cMyArray(3)
cMyArray[1] = 'A'
cMyArray[2] = 'B'
cMyArray[3] = 'C'

FOR EACH cMyVar IN cMyArray
   ? cMyVar
ENDFOR

In the following example, an instance of Microsoft Excel is created, and a new workbook is added. FOR EACH is used to display the name of each worksheet in the workbook. This example requires that Microsoft Excel be properly installed on the machine on which the example is run.

oExcel = CREATE("Excel.Application")
oExcel.Workbooks.ADD

FOR EACH oMyVar IN oExcel.sheets
   ? oMyVar.name
NEXT oMyVar

In the following example, five command buttons are placed on a form. FOR EACH is used to display the buttons on the form and specify the captions, font styles and positions of each button.

PUBLIC oMyObject
oMyObject = CREATEOBJECT("frmTest")
oMyObject.SHOW

DEFINE CLASS frmTest AS FORM
Height = 200
DIMENSION MyArray[5]
   PROCEDURE Init

      FOR i = 1 to 5
         THIS.AddObject('THIS.MyArray[i]',;
            'COMMANDBUTTON')
      ENDFOR

***** FOR EACH - NEXT ***** FOR EACH oButton IN THIS.MyArray oButton.Visible = .T. NEXT

***** FOR EACH - NEXT element ***** FOR EACH oButton IN THIS.MyArray oButton.FontBold = .T. NEXT obutton

      j = 1

***** FOR EACH - ENDFOR ***** FOR EACH oButton IN THIS.MyArray oButton.top = j * 30 j = j + 1 ENDFOR

***** FOR EACH - ENDFOR element ***** FOR EACH oButton IN THIS.MyArray oButton.FontItalic = .T. ENDFOR obutton

      j = 1

***** EXIT ***** FOR EACH oButton IN THIS.MyArray oButton.Caption = "test" + str(j) j = j+1 IF j > 3 EXIT ENDIF NEXT

      j = 1

***** LOOP ***** FOR EACH oButton IN THIS.MyArray IF j > 3 LOOP ENDIF j = j + 1 oButton.Left = 25 NEXT ENDPROC ENDDEFINE

Megosztás a következőn keresztül:

FOR EACH ... ENDFOR Command

Property Values

Examples

See Also

További források