How to implement infinite classification to display a list of categories in a drop-down box (to be hierarchical)?

gqy1906

How to implement infinite classification to display a list of categories in a drop-down box (to be hierarchical)?

everever30

Simple can be filled with spaces in front of text to display the hierarchy

gqy1906

Just use | Chengdu Company
       -| Chengdu First Company
       -| DChengdu Second Company
         -| Marketing
         -| Second Division
      | Chengdu Company
       -| Chengdu First Company
       -| DChengdu Second Company
         -| Marketing
         -| Second Division
To be displayed in the drop-down window. How to achieve it?

zhouji700

Similar to the generation of TREE, it is not difficult to implement it recursively.

saintfrosty

Use table, textbox (or label, embedded in TableCell), htmlbutton (embedded with Textbox in TableCell), panel (embedded in another TableCell to automatically generate scroll bars), menu each, and the button on the client to change the menu display style To achieve the purpose of pull down.

saintfrosty

Using a user control for the layout control, it seems that the control code to be written does not exceed 10 lines (mainly used to dynamically generate several pieces of javascipt code, such as the onclick event code to generate htmlbutton), it is still very simple.

gqy1906

Can you point the source code, let the younger brother learn

terhfdg

thumbs up

fuyaohua0

Give some code,

z_jili

I also need it, can the expert give an example of the code (the drop-down box under html, not swing)