ComboBox中的自动完成功能问题（DropDownList） [英] Problem with AutoComplete feature in ComboBox (DropDownList)

问题描述

我在ComboBox（DropDownList）中的自动完成功能存在以下问题。我的组合设置：

AutoCompleteMode：AutoCompleteMode.Append

AutoCompleteSource：AutoCompleteSource.ListItems

DropDownStyle： ComboBoxStyle.DropDownList

项目：{" 40"，" 41"，" 42"" 43"}

现在再现步骤：

焦点和弹出（！）组合框，键入'42'（首先选择'40'，然后选择'42' - 这很好）然后按Tab键 - 值' 40'被恢复...没有更改值或索引的事件被触发..在调试时我看到在组合框上，离开事件值仍然是
'42'，但是在DropDownClosed事件中它被切换回'40'。两者之间没有任何东西被解雇。

这是一个已知问题以及如何处理它？<​​/ p>

 

Thanx，

Linas

---

Linas Mikutaitis

解决方案

尝试这样做：

 
 公开  Sub  新（）
 InitializeComponent（）
 
 comboBox1.DataSource = array 
 comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend 
 comboBox1.AutoCompleteSource = AutoCompleteSource.CustomSource 
 comboBox1.AutoCompleteCustomSource = 新 AutoCompleteStringCollection（）
 comboBox1.TextChanged + = 新 EventHandler（  AddressOf  comboBox1_TextChanged）
  End   Sub  
 
 私有  Sub  comboBox1_TextChanged（发件人正如 对象，e  As  EventArgs）
  Dim  text  As   String  = comboBox1.SelectedItem.ToString （）
 MessageBox.Show（text）
  End   Sub  
 

Hi,

I have the following problem with AutoComplete feature in ComboBox (DropDownList). My settings for combo:

AutoCompleteMode: AutoCompleteMode.Append

AutoCompleteSource: AutoCompleteSource.ListItems

DropDownStyle: ComboBoxStyle.DropDownList

Items: {"40","41","42","43"}

Now reproduction steps:

Focus and Popup (!) ComboBox, type '42' (at first '40' is selected, then '42' - which is fine) and then press Tab - value '40' is restored... no events of the value or index changed fired.. While debugging I see that on combobox Leave event value is still '42', but on DropDownClosed event it's switched back to '40'. Nothing is fired in between.

Is it a known issue and how to deal with it?

 

Thanx,

Linas

---

Linas Mikutaitis

解决方案

Try to do it this way:

Public Sub New()
	InitializeComponent()

	comboBox1.DataSource = array
	comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend
	comboBox1.AutoCompleteSource = AutoCompleteSource.CustomSource
	comboBox1.AutoCompleteCustomSource = New AutoCompleteStringCollection()
	comboBox1.TextChanged += New EventHandler(AddressOf comboBox1_TextChanged)
End Sub

Private Sub comboBox1_TextChanged(sender As Object, e As EventArgs)
	Dim text As String = comboBox1.SelectedItem.ToString()
	MessageBox.Show(text)
End Sub

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