ImageComboBoxEdit选中的值不可设置

Question

我正在尝试将ImageComboBoxEdit控件添加到WinForms应用程序中的UserControl上。

public ShortCutUserControl()
{
    var imageCollection = new ImageCollection { ImageSize = new Size(48, 48) };
    imageCollection.Images.Add(Image.FromFile(@"Keyboard\ctrl.ico"));
    imageCollection.Images.Add(Image.FromFile(@"Keyboard\alt.ico"));
    functionKeyImageComboBoxEdit.Properties.LargeImages = imageCollection;

    ImageComboBoxItem ctrlItem = new ImageComboBoxItem
    {
        Description = "Ctrl",
        ImageIndex = 0
    };
    ImageComboBoxItem altItem = new ImageComboBoxItem
    {
        Description = "Alt",
        ImageIndex = 1
    };
    functionKeyImageComboBoxEdit.Properties.Items.Add(altItem);
    functionKeyImageComboBoxEdit.Properties.Items.Add(ctrlItem);
}

加载控件时：

我无法直接通过代码或在UI中更改当前。

functionKeyImageComboBoxEdit.SelectedIndex = 0;

我已尝试将事件附加到functionKeyImageComboBoxEdit，但这些似乎都没有被触发/捕获;

functionKeyImageComboBoxEdit.SelectedIndexChanged += FunctionKeyImageComboBoxEditOnSelectedIndexChanged;

private void FunctionKeyImageComboBoxEditOnSelectedIndexChanged(object sender, EventArgs eventArgs)
{
    //throw new NotImplementedException();
}

我的代码中缺少什么？我一直在看DevExpress ImageComboBoxEdit Documentation，但看不出任何问题。

Answer 1

问题的原因是您没有为ImageComboBoxItems设置值。这样做：

ImageComboBoxItem ctrlItem = new ImageComboBoxItem
{
    Description = "Ctrl",
    ImageIndex = 0,
    Value = "Ctrl"
};
ImageComboBoxItem altItem = new ImageComboBoxItem
{
    Description = "Alt",
    ImageIndex = 1,
    Value = "Alt"
};