DataWindow.SetSelectiveRelation Method (Typed) |  |
Set a selective relation from this window to the child window, or actually from the server of
this window to the server of the other window. A selective relation is one that limits operations on the child server to those records that match the relation condition.
Namespace: XSharp.VO.SDK
Assembly: XSharp.VOGUIClasses (in XSharp.VOGUIClasses.dll) Version: 2.21
SyntaxVIRTUAL METHOD SetSelectiveRelation( oDWChild AS DataWindow, uRelation AS USUAL, cRelation AS STRING ) AS USUAL
Parameters
- oDWChild
- Type: DataWindow
The window attached to the child server; which must be a data window linked to a server of compatible type. If omitted, all relations for this server are removed (although the recommended way of doing this is the DataWindow:ClearRelations() method). - uRelation
- Type: Usual
The relation code block for the server, The name or symbol representing the field from this server; a code block is constructed and macro-compiled or the array of field names or symbols representing the relation for the server. The field names are concatenated with plus signs and formed into a code block which is macro-compiled. - cRelation
- Type: String
When the relation is specified as a code block, a string version of the code block can be provided as well; it is returned by the Relation() method.
Return Value
Type: UsualTRUE if successful; otherwise, FALSE.
Remarks Tip |
|---|
| This operation may not be supported, depending on whether the servers used supports relations and are of compatible types. |
Examples
The API can take these forms:
X#
1oDWCustomer:SetSelectiveRelation(oDWOrders, {||_FIELD->CustNo},"CustNo") 2oDWCustomer:SetSelectiveRelation(oDWOrders, #CustNo) 3oDWCustomer:SetSelectiveRelation(oDWOrders, {#LastName,#Initial,#FirstName})
See Also