[求助]：MDL开发中的问题-如何给MS中的实体附加用户数据？

DARCY

请教：如何给MS中的实体附加用户数据？
比如给LINE(TYPE == 3)附加我定义的数据（CHAR* , DOUBLE）。
若写过ARX的程序，就像给使用“XDATA 或 XRECORD”一样？

:8

u2u

希望對你有!!

User Attribute Linkages
When building your application:
1.        Create a ".mt" file that contains createdatadef statements for every struct that will be used to define the data portion of your user attribute linkages. The ".mt" file must include the header files where the structures are defined. It must also include pragmas for treating the structure as packed little endian data. For example:

      #include <myfile.h>  /* This defines "mylinkagestruct" */

      #pragma packedLittleEndianData

      createDataDef (mylinkagestruct, MYLINKAGE_DATADEF_ID);

2.        Update your application's make file to compile the ".mt" file using the rsctype compiler. The resulting ".r" file must be compiled with rcomp, and the subsequent ".rsc" file must be lib'ed into your application's ".ma" file using rlib.

At execution time:
3.        Use the mdlLinkage_... routines for appending, extracting, and deleting user data linkages to/from elements. The mdlLinkage_... routines take data definition IDs and call the mdlCnv_... functions internally.

DARCY

非常感谢:"u2u"!
不知您是否在开发中广泛的使用了这种方法?
或者用数据库和实体的链接等别的方法来建立"用户数据"和"MS实体"的关系?