Take advantage of the null object pattern in .NET to eliminate the need for null checks and avoid runtime errors in your applications. You might often encounter null reference exceptions in your ...

Take advantage of the NULL Object pattern to avoid writing too much boilerplate code in your application when checking for null values A null object is one that doesn’t have any referenced value. The ...

select count(*) into :li_count from kctj where pro_code=:p1 and ck_code=:c1; 但相同的程序我在入库单是就能运行。。。。求大虾们帮忙解决 ...