组合框按键事件问题 [英] combobox keypress event problem

问题描述

大家好，



当我从组合框中选择项目然后按回车键时，我无法进入textbox1，当我按下回车键时我想专注于textbox1组合框。



以下是我的代码..

 Private Sub combobox1_KeyPress（ ByVal sender As Object，ByVal e As System.Windows.Forms.KeyPressEventArgs）Handles ComboBox1.KeyPress 
 If Asc（e.KeyChar）= 13 Then 
 e.Handled = True 
 TextBox1.Focus （）
退出Sub 
结束如果
结束子

[已编辑]代码包含在pre标签[/ edited]

解决方案

我使用了相同的代码，然后在从Combobox1选择值后按Enter键检查是否有效。它对我有用，它按下后输入成功聚焦TextBox1。当我改变TextBox时它的焦点对应Textbox。所以我在这个编码中没有收到任何错误。

使用按键事件。

  private   void  comboBox1_KeyDown（ object  sender，KeyEventArgs e）
 {
  if （e.KeyValue ==  13  ）
 {
 textBox1.Focus（）; 
} 
} 

在VB中

 私有  Sub  combobox1_KeyDown（ ByVal 发​​件人作为 对象， ByVal  e  As  System.Windows.Forms.KeyEventArgs）句柄 ComboBox1.KeyDown 
 < span class =code-keyword>如果 e.keyValue = 13 那么 
 textBox1.Focus（）; 
 结束 如果 
 结束  Sub  

看看我再次检查了你的 ComboBox1_KeyPress 给出的事件编码

正如您在评论中提到的那样，您在Form_Load事件中的 ComboBox 中添加了一些值。我还写了一个能够在 FormLoad事件中填写 ComboBox 的函数

 私有  Sub  ADDData（ ByVal  cmb  As  ComboBox）
  Dim  i 作为 整数 
 对于 i =  0     10  
 cmb.Items.Add（i ）' 在相应的组合框中添加1到10的值 
 下一步 
 结束  Sub  

 私人  Sub  Form1_Load（ ByVal  sender  As  System。对象， ByVal  e  As  System.EventArgs）句柄  MyBase  .Load 
 ADDData（ComboBox1）'  form_load事件中的调用方法，用于添加值im Combobox  
 结束  Sub  

 私人  Sub  ComboBox1_KeyPress（ ByVal  sender  As  System 。对象， ByVal  e 作为系统。 Windows.Forms.KeyPressEventArgs）句柄 ComboBox1.KeyPress 
 如果 Asc（e.KeyChar）=  13  然后 
 e.Handled =  True  
 TextBox1.Focus（ ）' 选择值后，它会关注TextBox1并按下 
 退出  Sub  
 结束 如果 
 结束  Sub  

Hi all,

When I select item from combobox and then press enter, I cant go in textbox1, I want to focus on textbox1 when I press enter in combobox.

following is my code..

Private Sub combobox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles ComboBox1.KeyPress
       If Asc(e.KeyChar) = 13 Then
           e.Handled = True
           TextBox1.Focus()
           Exit Sub
       End If
   End Sub

[Edited]Code is wrapped in "pre" tags[/Edited]

解决方案

I've used same code and then press Enter after selecting value from Combobox1 to check its works or not. its works for me it successfully focusing TextBox1 after press enter. when I changed TextBox its focus corresponding Textbox. So I didn't get any error in this Coding.

Use the key down event.

private void comboBox1_KeyDown(object sender, KeyEventArgs e)
 {
     if (e.KeyValue == 13)
     {
         textBox1.Focus();
     }
}

In VB

Private Sub combobox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles ComboBox1.KeyDown
      If e.keyValue=13 Then
         textBox1.Focus();
      End If
End Sub

Take a look I've again checked your ComboBox1_KeyPress Event Coding as given
as You mentioned in Comment you are adding Some value in ComboBox in Form_Load event. I've also write a function which will able to fill ComboBox in FormLoad event

Private Sub ADDData(ByVal cmb As ComboBox)
      Dim i As Integer
      For i = 0 To 10
          cmb.Items.Add(i) ' Add value from 1 to 10 in corresponding combobox 
      Next
  End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       ADDData(ComboBox1) 'Calling method in form_load event for adding value im Combobox 
   End Sub

Private Sub ComboBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles ComboBox1.KeyPress
         If Asc(e.KeyChar) = 13 Then
           e.Handled = True
           TextBox1.Focus()  'it focus on TextBox1 after selecting value and press enter 
           Exit Sub
       End If
   End Sub

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