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Function to pass values to any table or field

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  • Function to pass values to any table or field

    After a couple hours of playing around I came up with this function. I am using it on the CanWriteTo field event so that when the value of that field is changed that value will be passed down to the child table.

    Works for any table and any field in that table. Can only write to one field and table at a time....so far...

    I find this very useful, hope you do too!

    Code:
    FUNCTION Pass_Value_To_Child AS C (vTBL AS C, vFieldName AS C, vValue AS A, vIDFieldName AS C, vIDValue AS A )
    	DIM vFieldType as c
    	DIM vFieldNum as n
    	DIM vFieldList as c
    	DIM vField as p
    	DIM vIDFieldType as c
    	DIM vIDFieldNum as n
    	DIM vIDFieldList as c
    	DIM vIDField as p
    	DIM tbl as p
    	DIM myFilter as c 
    	DIM myOrder as c 
    	DIM vRecCount as n
    	DIM pField as p
    	DIM qry as p
    	tbl = table.open(vTBL)
    		'Get the field type for the child table key field
    		vIDFieldList =  tbl.field_name_get()
    		vIDFieldNum = word_number_get(vIDFieldList,vIDFieldName,crlf(),.t.)
    		vIDField = tbl.field_get(vIDFieldNum)
    		vIDFieldType = vIDField.type_get()
    		
    		if vIDFieldNum > 0 then
    			myFilter = alltrim(vIDFieldName) + "=" + convert_type(vIDValue,vIDFieldType)
    		else
    			ui_msg_box("Error!","The ID field was not found in the child table. The ID Field Name is:  " + alltrim(vIDFieldName))
    		end if
    		
    		'Get field type for the value to be entered
    		vFieldList = tbl.field_name_get()
    		vFieldNum = word_number_get(vFieldList,vFieldName,crlf(),.t.)
    		vField = tbl.field_get(vFieldNum)
    		vFieldType = vField.type_get()
    		
    		'Set the variable type of the value to be changed to the same type as the field it will be entered into
    		pField = vField
    		if vFieldNum > 0 then
    			qry = tbl.query_create("",myFilter,"")
    			vRecCount = qry.records_get()
    
    			if vRecCount > 0 then
    				tbl.fetch_first()
    				while .not. tbl.fetch_eof()
    					tbl.change_begin()
    						vField.value_put(vValue)
    				       tbl.change_end(.t.)
    				       tbl.fetch_next()
    			        end while
    			end if
    		else
    			ui_msg_box("Error!","The field being replaced in the child table was not found. The Field Name is:  " + alltrim(vFieldName))
    			end
    		end if
    	tbl.close()
    
    
    END FUNCTION
    Lee Goldberg
    Software Development and Sales
    Shore Consultants Ltd.
    [email protected]
    www.shorecon.com
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