大师:dim a as string
a = a.replace("m","n") 与
dim a as string = “”
a = a.replace("m","n")
上面的错误,下面的正确
那么当这样写
dim a as string
a = DataTables("qcye_xm").Compute("min(qcyexmsql语句)","glid = '" & glidzfc & "'")
如果DataTables("qcye_xm").Compute("min(qcyexmsql语句)","glid = '" & glidzfc & "'")的值为空时,或没有执行
此时a 有没有赋值,还是“”?,还是nothing?