如何通过textchanged搜索组合框中的过滤器文件夹 [英] How can I search filter folders in combobox by textchanged

问题描述

我只想通过ComboBoxTextChanged搜索带有ComboBox的过滤器驱动器和文件夹



我可以将它与按钮一起使用Click但我只想在文本时动态在组合框中



当我尝试它时ComboBox文本全部选中，如果我想继续，我必须设置取消选择它。



如何在comboBox下搜索/过滤文件夹。



我尝试过：

I just want to Search Filter Drive and Folders with ComboBox by ComboBoxTextChanged

I can use it with button Click but I just want to do it dynamic when I text in comboBox

when I try it ComboBox Text Full Selected and if I want to continue I must set deselected it.

How cam I search/filter folders under comboBox.

What I have tried:

Private Sub Button26_Click(sender As Object, e As EventArgs) Handles Button26.Click
        Try
            ComboBox1.Items.Clear()
        Expand(UCase(ComboBox1.Text))
        Dim folders() As String = IO.Directory.GetDirectories(UCase(ComboBox1.Text)) '("C:\7143")
        For Each folder As String In folders
            ComboBox1.Items.Add(folder)
                ComboBox1.DroppedDown = True
            Next

        Catch ex As Exception

        End Try

    End Sub

推荐答案

创建一个从ComboBox派生的控件，并覆盖OnTextChanged方法：

Create a control derived from ComboBox, and override the OnTextChanged method:

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Threading.Tasks
Imports System.Windows.Forms

Namespace OneOffJobs
    Public Class MyComboBox
        Inherits ComboBox

        Protected Overrides Sub OnTextChanged(ByVal e As EventArgs)
            MyBase.OnTextChanged(e)
            Console.WriteLine(Text)
        End Sub
    End Class
End Namespace

而不是Console.WriteLine，哟你可以随心所欲。

然后在yoru表单上使用它而不是ComboBox控件。

Instead of Console.WriteLine, you can do whatever you want.
Then use that instead of a ComboBox control on yoru form.

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