Question

VB.NET两个TextBox，在一个中输入数字，另一个同时显示刚输入的数字

Answer 1

若textbox1中输入数字，就把它的值赋给textbox2

Answer 2

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
TextBox2.Text = TextBox1.Text
End Sub

Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.TextChanged
TextBox1.Text = TextBox2.Text
End Sub