我想做个winform中类似于属性面板中font中控件

Question

我想做个winform中类似于属性面板中font中控件，也就是说当焦点没在这个控件的时候，看起来像个textbox，当焦点在这个控件的时候，最后面会有个小的button或者向下的箭头！

Answer 1

LZ你是想要调整字体的效果，还是要个COMBOX下拉单效果？还是想要WORD里直接下拉单选字体的效果？

Answer 2

properygrid
http://www.codeproject.com/KB/cpp/DynamicDropDownProperties.aspx

Answer 3

你用自定义控件，在上面放一个textbox和butten，然后用代码获取到鼠标的焦点，当textbox获取到的时候butten显示，否则的话隐藏，然后其他操作你在butten里操作就可以了。不知道对不对，你可以参考一下，我没有实验。

Answer 4

下面的代码基本实现你要的功能，不过这仅仅是个示例。而且只能显示字符串，你参考一下吧思路就是使用了一个UserControl，里面有一个ComboBox和一个Label，当需要编辑时就显示combobox，不需要编辑了就显示label
        public class ComboBoxControl : UserControl
    {
        private Label m_Label;        private ComboBox m_ComboBox;        private void InitializeComponent()
        {
            this.m_ComboBox = new System.Windows.Forms.ComboBox();
            this.m_Label = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // m_ComboBox
            // 
            this.m_ComboBox.Dock = System.Windows.Forms.DockStyle.Fill;
            this.m_ComboBox.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.m_ComboBox.FormattingEnabled = true;
            this.m_ComboBox.Location = new System.Drawing.Point(0, 0);
            this.m_ComboBox.Name = "m_ComboBox";
            this.m_ComboBox.Size = new System.Drawing.Size(150, 21);
            this.m_ComboBox.TabIndex = 0;
            this.m_ComboBox.Visible = false;
            this.m_ComboBox.LostFocus += new System.EventHandler(this.m_ComboBox_LostFocus);
            this.m_ComboBox.SelectedIndexChanged += new System.EventHandler(this.m_ComboBox_SelectedIndexChanged);
            // 
            // m_Label
            // 
            this.m_Label.BackColor = System.Drawing.Color.Transparent;
            this.m_Label.Dock = System.Windows.Forms.DockStyle.Fill;
            this.m_Label.Location = new System.Drawing.Point(0, 0);
            this.m_Label.Name = "m_Label";
            this.m_Label.Size = new System.Drawing.Size(150, 21);
            this.m_Label.TabIndex = 1;
            this.m_Label.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            this.m_Label.MouseDown += new System.Windows.Forms.MouseEventHandler(this.m_Label_MouseDown);
            // 
            // ComboBoxControl
            // 
            this.BackColor = System.Drawing.SystemColors.Window;
            this.Controls.Add(this.m_Label);
            this.Controls.Add(this.m_ComboBox);
            this.Name = "ComboBoxControl";
            this.Size = new System.Drawing.Size(150, 21);
            this.ResumeLayout(false);        }        public ComboBoxControl()
        {
            InitializeComponent();
        }        protected override void OnGotFocus(EventArgs e)
        {
            base.OnGotFocus(e);
            ChangeInnerControlState(true);
        }        public ComboBox.ObjectCollection Items
        {
            get { return m_ComboBox.Items; }
        }        public object SelectedItem
        {
            get { return m_ComboBox.SelectedItem; }
            set { m_ComboBox.SelectedItem = value; }
        }        public int SelectedIndex
        {
            get { return m_ComboBox.SelectedIndex; }
            set { m_ComboBox.SelectedIndex = value; }
        }        private void m_Label_MouseDown(object sender, MouseEventArgs e)
        {
            ChangeInnerControlState(true);
        }        void m_ComboBox_LostFocus(object sender, EventArgs e)
        {
            ChangeInnerControlState(false);
        }        private void ChangeInnerControlState(bool isGotFocus)
        {
            m_ComboBox.Visible = isGotFocus;
            m_Label.Visible = !isGotFocus;
            if (isGotFocus) 
                m_ComboBox.Focus();
        }        private void m_ComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            m_Label.Text = m_ComboBox.SelectedItem.ToString();
        }
    }