文本框中的 Vb.net + 自动完成
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Vb.net + AutoComplete in textboxes
提问by Kenny Bones
So I was reading a bit on AutoComplete of textboxes in VB.NET, but I can't really understand where these are stored? Is it a fully built in feature, or do I have to write some code for it to work? I've found the AutoCompleteModeand AutoCompleteSourceproperties of textboxes. But I want to append whatever I've written in the textbox to the autocomplete source. Do I connect the source to My.Settingsor something? Wouldn't I have to use an array as well? Any help would be appreciated :)
所以我在 VB.NET 中阅读了一些关于自动完成文本框的内容，但我真的不明白它们的存储位置？它是完全内置的功能，还是我必须编写一些代码才能使其工作？我找到了文本框的AutoCompleteMode和AutoCompleteSource属性。但我想将我在文本框中编写的任何内容附加到自动完成源。我是否将源连接到My.Settings或什么？我不是也必须使用数组吗？任何帮助，将不胜感激 ：）
回答by stakx - no longer contributing
You would have to add new entries to your auto-complete data source manually... which makes sense, when you think about it: How is Windows Forms supposed to know when a new entry should be added to the list of suggestions and when the text entered is only something temporary?
您必须手动将新条目添加到您的自动完成数据源中...这是有道理的，当您考虑它时：Windows 窗体应该如何知道何时应将新条目添加到建议列表以及何时输入的文字只是暂时的？
You could add new values e.g. when validation of the input field happens, or when the user presses an OK / Apply button, or whatever fits your need best. But you will have to do this yourself.
您可以添加新值，例如，在验证输入字段时，或当用户按下“确定”/“应用”按钮时，或任何最适合您需要的值。但是你必须自己做这件事。
The properties you've already discovered are the right ones.
您已经发现的属性是正确的。
Dim suggestions As New List(Of String)
suggestions.Add("Abba")
suggestions.Add("Nirvana")
suggestions.Add("Rolling Stones")
...
textBox.AutoCompleteSource = suggestions
You can bind AutoCompleteSourceto almost anything; this is very similar to data-binding. One thing to keep in mind is that if you're adding new entries to the auto-complete data source, the UI control might not immediately notice if your data source doesn't implement the INotifyCollectionChangedinterface.
你AutoCompleteSource几乎可以绑定任何东西；这与数据绑定非常相似。要记住的一件事是，如果您向自动完成数据源添加新条目，则 UI 控件可能不会立即注意到您的数据源未实现该INotifyCollectionChanged接口。
回答by Christhofer Natalius
first create the list to use as the custom source.
首先创建列表以用作自定义源。
Dim MySource As New AutoCompleteStringCollection()
and then set the property of the textbox
然后设置文本框的属性
With MyTextbox
.AutoCompleteCustomSource = MySource
.AutoCompleteMode = AutoCompleteMode.SuggestAppend
.AutoCompleteSource = AutoCompleteSource.CustomSource
End With
put this code in eventlistener you use for validating the input field, e.g. btnOK.Click
将此代码放在用于验证输入字段的事件侦听器中，例如 btnOK.Click
Private Sub btnOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOK.Click
MySource.Add(txtinput.text)
End Sub
