Question

我的项目有3个组合框，它们都收集相似的数据（相同的选项，但它们会导致不同的用户选择）我有一个由mysql数据填充的数据表 - 这个数据表链接到这些组合框中的每一个。不幸的是，当你在其中一个组合框中选择一个列表项时，它会在所有3个组合框中选择它（我不希望它这样做）

项目在加载时绑定到组合框，如下所示：

Private Sub ptnew_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ComboBox5.DataSource = insurancecompanies
    ComboBox5.DisplayMember = "IName"
    ComboBox5.ValueMember = "IID"
    ComboBox7.DataSource = insurancecompanies
    ComboBox7.DisplayMember = "IName"
    ComboBox7.ValueMember = "IID"
    ComboBox6.DataSource = insurancecompanies
    ComboBox6.DisplayMember = "IName"
    ComboBox6.ValueMember = "IID"
End Sub

如何阻止此操作发生

Answer 1

克隆您的数据源，以便它们是独立的实体。

Private Sub ptnew_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ComboBox5.DataSource = insurancecompanies.Copy
    ComboBox5.DisplayMember = "IName"
    ComboBox5.ValueMember = "IID"
    ComboBox7.DataSource = insurancecompanies.Copy
    ComboBox7.DisplayMember = "IName"
    ComboBox7.ValueMember = "IID"
    ComboBox6.DataSource = insurancecompanies.Copy
    ComboBox6.DisplayMember = "IName"
    ComboBox6.ValueMember = "IID"
End Sub

修改：将Clone方法更改为Copy以保留数据

将组合框彼此脱开

1 个答案: