2008年,我是新鲜事,正试图申请计算体积(化学)。
下面是方程式(非化学)
M1V1=M2V2
如果M1和M2为Molarity,V1,V2为数量(所有变量)。
为此,我提出了四个文本箱和一个纽州。 现在,如果提供其他三个价值观,我只能找到一个变数的M2
页: 1
M2=(M1V1)/V2
i 想知道,如何使这一应用更具活力
lets say i want to find
M1,M2,V1 or V2 any of these,just providing the other three values
我认为,如果能提供其他信息,但我会知道如何做到这一点。
预先感谢您的帮助
我将以这种方式处理此事。
我将列举我的四个文本箱:
txtM1
txtM2
txtV1
txtV2
then
Create:
Private Sub textbox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtM1.TextChanged, txtM2.TextChanged, txtV1.TextChanged, txtV2.TextChanged
Select Case True
Case txtM1.Text <> "" AndAlso _
txtV1.Text <> "" AndAlso _
txtV2.Text <> ""
txtM2.Text = CInt((txtM1.Text * txtV1.Text) / txtV2.Text)
Case txtM2.Text <> "" AndAlso _
txtV1.Text <> "" AndAlso _
txtV2.Text <> ""
txtM1.Text = "Your formula for M1"
Case txtM1.Text <> "" AndAlso _
txtM2.Text <> "" AndAlso _
txtV1.Text <> ""
txtV2.Text = "Your formula for V2"
Case txtM1.Text <> "" AndAlso _
txtM2.Text <> "" AndAlso _
txtV2.Text <> ""
txtV1.Text = "Your formula for V1"
End Select End Sub
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