Question

为了保持简洁，我试图通过标签显示通过第二个表单上的组合框选择的数字。

以下是与我遇到的问题相关的位：

for i = 1 To 31
cmb_days.Items.Add(i) 
next
' Populating combo box 
days = cmb_days.text
frm_result.lbl_renting = "Renting for " & days & " Days"

我尝试过使用其他变种，例如cmb_days.selecteditem无效

我也有点问题就是告诉我的代码用组合框中实际选择的任何数字来做事情，idk我是非常新的

Answer 1

That looks more or less correct.. But the question is where your call to update the label occurs in your code...

This is a minimal working example, with just a ComboBox on a form:

Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        For i = 1 To 31
            ComboBox1.Items.Add(i)
        Next
    End Sub

    Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
        Me.Text = ComboBox1.Text
    End Sub
End Class

The update of the label (in this case the text of the form, but it works exactly the same with a label on a different form) occurs in the SelectedIndexChanged event of ComboBox1.

If you copied your code straight from the project, you haven't had time to select anything yet, so the Text property will be empty.

Visual Basic - 在文本框上显示组合框条目

1 个答案: