如何通过在组合框中输入文本来触发子例程 [英] How do I trigger a sub routine by entering text in a combobox

问题描述

大家好

我是VB.net的绝对首发



我试图将数据输入组合框并想要按下返回后触发一个子例程。

我试过这个：

Private Sub ComboBox1_TextChanged（发送者为对象，e为EventArgs）处理ComboBox1.TextChanged

，但这会在键入的第一个字母上触发。

ie如果我想输入John Doe，则只要我输入J，子程序就会启动

任何人都可以指出我正确的方向。



感谢提前给予

Hi All
I am an absolute starter in VB.net

I am trying to enter data into a combo box and want to trigger a sub routine once I press return.
I tried this:
Private Sub ComboBox1_TextChanged(sender As Object, e As EventArgs) Handles ComboBox1.TextChanged
but this triggers on the first letter typed.
ie If I want to enter "John Doe" the sub routine starts as soon as I enter the "J"
Can anyone point me in the right direction.

Thanks given in advance

推荐答案

使用

Combobox1_KeyDown

活动。



这里有一些代码可以开始：

event.

Here's some code to start:

If e.KeyCode = Keys.Enter Then
          'call your sub here
      End If

chrisf8657



谢谢你的建议。我修改了我的代码如下;

chrisf8657

Thank you for your suggestion. I have modified my code as follows;

Private Sub Player1_KeyDown(sender As Object, e As EventArgs) Handles Player1.KeyDown
        'set curComboItem to the text contained within the ComboBox
        Dim curComboItem = Player1.Text.ToString()
        'set curCombo to name of combobox
        Dim curCombo = Player1
        'check to see if last keystroke was the enter key if so run sub routine
        If e.KeyCode = Keys.Enter Then
            ComboBox_Update(curComboItem, curCombo)
        End If
    End Sub

但我得到的代码错误是KeyCode不是'系统的成员。 EventArgs'对e.KeyCode



你能帮忙吗？



谢谢



PS只需将争论从e as EventArgs设置为e as KeyEventsArgs错误清除。



非常感谢你们您的支持解决方案运作良好。

but I get a code error of "KeyCode is not a member of 'System.EventArgs' against e.KeyCode

Can you help?

Thanks

PS Just set the arguement from "e as EventArgs" to "e as KeyEventsArgs" error cleared.

Thank you very much for your support the solution works well.

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