菜鸟提问
在VB中Label1.Caption = Str(Label1.Caption)中哪里错了呢,其中label1.caption为一个算式,如愿34+35 --------------------编程问答-------------------- Label1.Caption = CStr(Label1.Caption)但是不能像你想象的那样的那样计算34+35的值,显示还是34+35 --------------------编程问答-------------------- label1.caption=cstr(val(label1.caption)) --------------------编程问答-------------------- Private Sub Form_Load()
Label1.Caption = "34 + 35"
End Sub
Private Sub Command1_Click()
Label1.Caption = WZcalc(Label1.Caption)
End Sub
Public Function WZcalc(Tmpstr$) As Double
Dim sc
Set sc = CreateObject("ScriptControl")
sc.Language = "VBScript"
WZcalc = sc.Eval(Tmpstr)
Set sc = Nothing
End Function
--------------------编程问答-------------------- 有个小错误修改一下, 我想楼主的本意就是想直接运算34+35将洁果赋值给 Label1 是吗?
'添加 Command1 Label1
Private Sub Form_Load()
Label1.Caption = "34 + 35"
End Sub
Private Sub Command1_Click()
Label1.Caption = Cstr(WZcalc(Label1.Caption))
End Sub
Public Function WZcalc(Tmpstr$) As Double
Dim sc
Set sc = CreateObject("ScriptControl")
sc.Language = "VBScript"
WZcalc = sc.Eval(Tmpstr)
Set sc = Nothing
End Function
--------------------编程问答-------------------- 谢谢了,很好用,但不明白是什么意思,能提供一个QQ号吗?
--------------------编程问答-------------------- Private Sub Form_Load()
Label1.Caption = "34 + 35" 'Label1赋值
End Sub
Private Sub Command1_Click()
Label1.Caption = Cstr(WZcalc(Label1.Caption)) '调用WZcalc涵数并将返回的值赋给Label1显示
End Sub
Public Function WZcalc(Tmpstr$) As Double
Dim sc '宣告
Set sc = CreateObject("ScriptControl") '创建一个对像
sc.Language = "VBScript" '引用VBScript的语言
WZcalc = sc.Eval(Tmpstr) '使用Eval运行参数值赋值给WZcalc
Set sc = Nothing '清空对像
End Function
QQ: 138449666 我平时也没空
--------------------编程问答-------------------- what!?? --------------------编程问答-------------------- Str()函数要求参数为数字,返回字符,Label1.Caption是字符串数据,格式不匹配
补充:VB , 控件