没有从我的UserControl获取值 [英] Not getting the Value from my UserControl

问题描述

我创建了一个用户控件，只接受数字数字。

我在表单上使用此控件计算总共2个数字

我在两个控件中输入了一些值。只有值显示在用户控件中（例如10,20）

但我没有得到总数。我把BreakPoint放在了LostFocus活动中。

但它并没有参加那个特定的活动。为什么&怎么做。



i在我的usercontrol中写了以下代码

i created a user control to accept only Numerical Digits.
I used this control on my form to calculate total of 2 numbers
i entered some values in both controls. only values are showing in user controls (ex 10, 20)
but iam not getting the total. and i put BreakPoint in LostFocus event.
but it is not comming to that particular event. why & what to do.

i had written the following code in my usercontrol

Public Class Number2
    Public Event TxtN_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
    Private Sub txtN_KeyPress1(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtN.KeyPress
        If e.KeyChar <> "." And (e.KeyChar < "0" Or e.KeyChar > "9") Then
            e.Handled = True
        End If
    End Sub
    Private Sub txtN_LostFocus1(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtN.LostFocus
        txtN.Text = FormatNumber(Val(txtN.Text), 2, , , False)
    End Sub
    Private Sub txtN_TextChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtN.TextChanged
        RaiseEvent TxtN_TextChanged(sender, e)
    End Sub
    Property txtNtext() As String
        Get
            txtNtext = txtN.Text
        End Get
        Set(ByVal value As String)
            txtN.Text = value
        End Set
    End Property

End Class
and in form i am using it as
    Private Sub txtN1_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtN1.LostFocus
        txtN3.Text = FormatNumber(Val(txtN1.Text) + Val(txtN2.Text), 3, , , TriState.False)
    End Sub

但是没有任何东西在计算它的lostfocus

but nothing is calculating in its lostfocus

推荐答案

你好，看起来你可以做几件事。将用户控件重构为从TextBox继承并覆盖标准事件...或者将TxtN_LostFocus的事件添加到Number2类，并从txtN_LostFocus1方法引发该事件，就像使用TxtN_TextChanged事件和txtN_TextChanged_1方法一样。



此外，对于自定义事件，使用On [事件名称]是标准的。 （例如：OnLostFocus，OnTextChanged）

Hello, looks like you could do a couple things. Restructure the user control to Inherit from TextBox and override the standard events... or add an Event for TxtN_LostFocus to your Number2 class and raise that event from the txtN_LostFocus1 method like you are with the TxtN_TextChanged event and txtN_TextChanged_1 method.

Also, with custom events it is standard to use On[Event name]. (ex: OnLostFocus, OnTextChanged)

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