010000 metallurgical raw materials and cast iron pipe
010100 products on ferrous metal acquisition
Iron ore 010101
010102 limonite
CodePudding user response:
For LZ with
CodePudding user response:
Didn't understand the LZ requirements, is to create a tree structure, is I use the treeview to create, to retrieve all nodes, sorted by node level, first create the parent node, and then cascaded create child nodes,CodePudding user response:
Why do some people asking questions also need others guess the meaning of his problem, purpose, and so on, can't describe the problem clearly? This not only is good for you to solve the problem, that is, as the most basic of the programmer, clarity, problem description is clear,CodePudding user response:
First of all to find out the relationship between the Tree to build Tree,