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C#,hooform - 采用双arrow钥匙挑选名单箱?
原标题:C#, winform - List box selection using up and down arrow key?

我有箱子,我能够选择使用键盘和 mo子的条目(单一选择模式——一种时间),但当使用arrow头和缩小 key钥匙时,不能选择清单。 但是,每个实体能够用下文强调的语气滚动钥匙。 增 编

问题回答

加入表1。 主要活动:

private Form1_KeyDown(object sender, KeyEventArgs e)
{
  this.listBox1.Focus();
  this.listBox1.Select();

  if (e.Key == Keys.Up)
  {
    this.listBox1.SelectedIndex--;  
  }
  else if (e.Key == Keys.Down)
  {
    this.listBox1.SelectedIndex++;
  }
}

我认为,你可以使用安迪玛斯蒂斯蒂亚尔·安普森。 与此类似:

private const int WM_VSCROLL = 0x115;

[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, UIntPtr wParam, IntPtr lParam);

private void listBox_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Down)
    {
        SendMessage(this.listBox.Handle, (uint)WM_VSCROLL, (System.UIntPtr)ScrollEventType.SmallIncrement, (System.IntPtr)0);
        e.Handled = true;
    }

    if (e.KeyCode == Keys.Up)
    {
        SendMessage(this.listBox.Handle, (uint)WM_VSCROLL, (System.UIntPtr)ScrollEventType.SmallDecrement, (System.IntPtr)0);
        e.Handled = true;
    }
}

我写了这本法典。

     private void listBox1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Up)
        {
            int indicee = listBox1.SelectedIndex;
            label2.Text = indicee.ToString();
        }
        if (e.KeyCode == Keys.Down)
        {
            int indicee = listBox1.SelectedIndex;
            label2.Text = indicee.ToString();
        }

但是,如果要减少指数的对应变化,则认为该守则必须属于其他情况。

这是最佳办法,对我来说是工作罚款。

         private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {   
        int indicee = listBox1.SelectedIndex +1;
        label6.Text = indicee.ToString();
        ni = indicee-1;
        if (ni >= 0)
        { loadender(ni); }

当你把名单箱的指数也变换成狭义的钥匙时,你会在此时写你的代码。





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