在不同的文档间传递变量

Lisphk

There are various ways -

1. Use the Blackboard Namespace

When you define functions or assign values to global variables, these are defined within the Document Namespace and are hence only accessible from within the active document. However, you can store variables in a shared namespace known as the 'Blackboard Namespace', which is accessible from within all documents.

For example:

To store data in the Blackboard Namespace, use the vl-bb-set function, e.g.:
_$ (vl-bb-set 'myvar 123)

123

To retrieve the stored data from the Blackboard Namespace, use the vl-bb-ref function, e.g.:
_$ (vl-bb-ref 'myvar)
123

2. Use the vl-propagate function

The vl-propagate function will copy the value of a given variable from the active document namespace into all other document namespaces (including those subsequently opened after the function has been evaluated). However, unlike the use of a shared namespace, since the variables are copied to other namespaces, if you change the value of the variable in one namespace, the value of the variable will not change in the namespaces to which the variable has been copied.

For example:

Drawing1.dwg
Command: (setq myvar 123)
123
Command: (vl-propagate 'myvar)
123

Drawing2.dwg
Command: !myvar
123

On changing the variable in Drawing1.dwg:
Command: (setq myvar 456)
456

The value is not changed in Drawing2.dwg (until vl-propagate is called again):
Command: !myvar
123

3. Other Methods

Other methods of transferring data between documents include:
Writing data to file within one document and reading the file data from within another document
Writing data to the registry within one document and reading the registry data from within another document

434939575

谢谢，这个方便！