https://community.sap.com/t5/application-development-and-automation-discussions/refresh-rebuild-alv-tree-and-reset-node-key/m-p/4286202#M1022468 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I have made a program which uses the OO CL_GUI_ALV_TREE. </P><P>I build the tree and the nodes for the lines which are displayed on the right site.</P><P></P><P>When I click one of the buttons I'm able to open the planning screen with function ' GRAPH_GANTT'. When I close this function a lot of changes could be made or even new items could be inserted for the planning. </P><P></P><P>For showing these changes I remove the tree with the method: CALL METHOD G_INSTR_PLAN-&gt;DELETE_ALL_NODES</P><P></P><P>This deletes all tree notes. </P><P></P><P>If I rebuild the tree and add the complete lines the node key is not refreshed. So the key numbers get increased from the last key number from the first build.</P><P></P><P>So how could reset the key node numbers?</P><P></P><P>Kind regards,</P><P></P><P>Richard Meijn</P></BODY></HTML> Thu, 31 Jul 2008 14:34:24 GMT Former Member 2008-07-31T14:34:24Z https://community.sap.com/t5/application-development-and-automation-discussions/refresh-rebuild-alv-tree-and-reset-node-key/m-p/4286202#M1022468 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I have made a program which uses the OO CL_GUI_ALV_TREE. </P><P>I build the tree and the nodes for the lines which are displayed on the right site.</P><P></P><P>When I click one of the buttons I'm able to open the planning screen with function ' GRAPH_GANTT'. When I close this function a lot of changes could be made or even new items could be inserted for the planning. </P><P></P><P>For showing these changes I remove the tree with the method: CALL METHOD G_INSTR_PLAN-&gt;DELETE_ALL_NODES</P><P></P><P>This deletes all tree notes. </P><P></P><P>If I rebuild the tree and add the complete lines the node key is not refreshed. So the key numbers get increased from the last key number from the first build.</P><P></P><P>So how could reset the key node numbers?</P><P></P><P>Kind regards,</P><P></P><P>Richard Meijn</P></BODY></HTML> Thu, 31 Jul 2008 14:34:24 GMT https://community.sap.com/t5/application-development-and-automation-discussions/refresh-rebuild-alv-tree-and-reset-node-key/m-p/4286202#M1022468 Former Member 2008-07-31T14:34:24Z https://community.sap.com/t5/application-development-and-automation-discussions/refresh-rebuild-alv-tree-and-reset-node-key/m-p/4286203#M1022469 <HTML><HEAD></HEAD><BODY><P>Hi ,</P><P> Use method Delete SUB_TREE that deletes based on node keys .</P></BODY></HTML> Fri, 01 Aug 2008 06:14:14 GMT https://community.sap.com/t5/application-development-and-automation-discussions/refresh-rebuild-alv-tree-and-reset-node-key/m-p/4286203#M1022469 Former Member 2008-08-01T06:14:14Z