| Unbound Mode > Using the RowBuffer Object |
The RowBuffer is a programmable object used to exchange data between the list and your data source via the unbound list events. The RowBuffer object is passed into the unbound list event handlers as an argument. In fact, the RowBuffer object can only exist within the scope of the unbound events; you cannot create a new one in code as you would a Column or Split object. Here is a thumbnail sketch of the properties of the RowBuffer object:
RowCount property
RowCount is a long integer that specifies the maximum number of rows that can be processed in an unbound event (read, write, or add). If the value of this property exceeds the number of rows that can be processed, such as when an end-of-file condition is detected, then your event handling code should change this property to reflect the actual number of rows processed.
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RowBuffer.RowCount = Long |
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ColumnCount property
ColumnCount is an integer that specifies the number of columns that the unbound event should process. This property is read-only, and no attempt should be made to change it. The unbound event should process all columns requested.
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Integer = RowBuffer.ColumnCount |
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ColumnName property
ColumnName is a string array that specifies the name of the list column corresponding to a row buffer index. This property is read-only.
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String = RowBuffer.ColumnName(ColIndex)
' where ColIndex = 0 to ColumnCount - 1
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Bookmark property
Bookmark is a variant array used to specify unique row bookmarks when the RowBuffer is used to fetch data during an unbound read event.
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RowBuffer.Bookmark(RowIndex) = Variant
' where RowIndex = 0 to RowCount - 1
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Value property
Value is a variant array used to specify the data value associated with a RowBuffer row and column.
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RowBuffer.Value(RowIndex, ColIndex) = Variant ' where RowIndex = 0 to RowCount - 1 ' and ColIndex = 0 to ColumnCount - 1 |
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ColumnIndex property
ColumnIndex is a variant array used to specify a list column index associated with a RowBuffer row and column. This property is read-only. You can use it in the UnboundReadDataEx event to identify which data columns are being requested.
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Col = RowBuffer.ColumnIndex(RowIndex, ColIndex) ' where RowIndex = 0 to RowCount - 1 ' and ColIndex = 0 to ColumnCount - 1 |
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