我似乎找不到一种简单易用的.net本机方式来获取.net winforms上的组合框以显示一个值,并根据选择返回另一个值,而无需创建自己的帮助器类,而要知道将显示winforms放入对象的ToString方法。
很一般地说,这就是我现在的做法。首先,创建助手类。
Public Class ListItem
Public Value As Object
Public DisplayString As String
Public Sub New(ByVal NewValue As Object, ByVal NewDisplayString As String)
Value = NewValue
DisplayString = NewDisplayString
End Sub
Public Overrides Function ToString() As String
Return DisplayString
End Function
End Class
然后,从集合或任何其他内容加载组合框。
For Each o as WhateverObject In CollectionIwantToaddItemsFrom
li = New ListItem(o.ValueToReturn, o.ValueToDisplay)
Me.ComboBox1.Items.Add(li)
Next
最后,使用对象
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles ComboBox1.SelectedIndexChanged
if me.combobox1.selecteditem is nothing then exit sub
Dim li As ListItem = me.ComboBox1.SelectedItem
Dim o as object = li.value
'do stuff with o.
end sub
我敢肯定,我最好在框架中使用某些东西。它是什么?
最佳答案
这有点骇人听闻,但这意味着您不必编写自己的Name-Value对类-没什么大不了的(可能已经在框架中有了更好的东西)。但是您可以做的是使用DictionaryEntry类-实际上是一个名称值对。将项目添加到列表中,然后使用组合框上的DataMember和ValueMember属性绑定到DictionaryEntry类的键和值属性。像这样:
var list = new List<System.Collections.DictionaryEntry>();
list.Add(new System.Collections.DictionaryEntry("one", 1));
list.Add(new System.Collections.DictionaryEntry("two", 2));
list.Add(new System.Collections.DictionaryEntry("three", 3));
comboBox1.DataSource = list;
comboBox1.DisplayMember = "Key";
comboBox1.ValueMember = "Value";
刚意识到您更喜欢vb方言。以下对VB相同:-)
Dim list As List(Of DictionaryEntry)
list = New List(Of DictionaryEntry)
list.Add(New DictionaryEntry("One", 1))
list.Add(New DictionaryEntry("Two", 2))
list.Add(New DictionaryEntry("Three", 3))
ComboBox1.DataSource = list
ComboBox1.DisplayMember = "Key"
ComboBox1.ValueMember = "Value"
关于.net - 显示一个值并将另一个值存储在.net组合框上的最佳方法是什么?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/197940/