Question

我已经获得了热键列表框的以下代码（此帖子缩写的数据集）。

我要做的是按下listview组件中的一个键（例如＆＃39; 2＆＃39;）并将热键列表框设置为2.

感谢您的帮助。

    private void listView_KeyPress(object sender, KeyPressEventArgs e)
    {
        // this line doesn't work !!!
        listBoxHotKeys.SelectedItem = e.KeyChar.ToString();
        e.Handled = true;
    }


    private List<HotKey> comboListHotKey = new List<HotKey>();

                comboListHotKey.Add(new HotKey("0", 48));
            comboListHotKey.Add(new HotKey("1", 49));
            comboListHotKey.Add(new HotKey("2", 50));
            comboListHotKey.Add(new HotKey("3", 51));
            comboListHotKey.Add(new HotKey("4", 52));
        listBoxHotKeys.DataSource = comboListHotKey;
            listBoxHotKeys.DisplayMember = "TextName";


public class HotKey
{
    public HotKey(string textName, uint keyCode)
    {
        TextName = textName;
        KeyCode = keyCode;
    }
    public string TextName { get; set; }
    public uint KeyCode { get; set; }
}

Answer 1

尝试

private void listView_KeyPress(object sender, KeyPressEventArgs e)
{
    int index = listBoxHotKeys.FindString(e.KeyChar.ToString(),-1);   
    if(index != -1)  //-1 index means it did not find an item
        listBoxHotKeys.SetSelected(index,true);
    e.Handled = true;
}

这推荐在this MSDN文章

中

Answer 2

这是vb示例，但您可以转换它：

更新：（此工作正常）

     Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim pp As New List(Of HotKey)
        pp.Add(New HotKey("0", 48))
        pp.Add(New HotKey("1", 49))
        pp.Add(New HotKey("2", 50))
        pp.Add(New HotKey("3", 51))
        pp.Add(New HotKey("4", 52))
        pp.Add(New HotKey("5", 53))
        ListBox1.DataSource = pp
        ListBox1.DisplayMember = "TextName"
        ListBox1.ValueMember = "KeyCode"
    End Sub

    Private Sub ListBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles ListBox1.KeyPress
        For x = 0 To ListBox1.Items.Count - 1
            Dim pp As HotKey = CType(ListBox1.Items(x), HotKey)
            If Asc(e.KeyChar) = pp.KeyCode Then
                ListBox1.SelectedIndex = x
                e.Handled = True
                Exit For
            End If
        Next
        'or just use : ListBox1.SelectedValue = Asc(e.KeyChar) : e.Handled = True
    End Sub
End Class

Public Class HotKey
    Private _name As String
    Private _key As Integer
    Public Sub New(ByVal textName As String, ByVal keyCode As Integer)
        _name = textName
        _key = keyCode
    End Sub

    Public Property TextName As String
        Get
            Return _name
        End Get
        Set(ByVal value As String)
            _name = value
        End Set
    End Property

    Public Property KeyCode As Integer
        Get
            Return _key
        End Get
        Set(ByVal value As Integer)
            _key = value
        End Set
    End Property
End Class

要认真，lamorach会为您提供正确答案，但需要进行一些转换，因为e.KeyChar会返回char值。

在每个人的解决方案中，使用e.KeyChar功能无法将uint转换为Asc。或者，我认为在c#你必须使用(int)e.KeyChar（我不确定，不是用c＃编程）。

Answer 3

如果你有的话，我会通过更新所选的值来设置它。

private void listView_KeyPress(object sender, KeyPressEventArgs e)
{
    listBoxHotKeys.SelectedValue = e.KeyChar;
    e.Handled = true;
}

我也相信您需要将列表框的ValueMember设置为等于项目的keyCode。

listBoxHotKeys.ValueMember = "KeyCode";

如何使用Value设置列表框

3 个答案: