C#带清除按钮的文本框TextBoxContainClearButton

    public partial class TextBoxContainClearButton : UserControl
    {
        public TextBoxContainClearButton()
        {
            InitializeComponent();
        }

        [Category("自定义"), Description("文本框鼠标悬停提示文本")]
        public string TextBoxToolTipText
        {
            set
            {
                toolTip1.SetToolTip(this.textBoxFront, value);
            }
            get
            {
                return toolTip1.GetToolTip(this.textBoxFront);
            }
        }
        [Category("自定义"), Description("清除按钮鼠标悬停提示文本")]
        public string ClearButtonToolTipText
        {
            set
            {
                toolTip1.SetToolTip(this.buttonClear, value);
            }
            get
            {
                return toolTip1.GetToolTip(this.buttonClear);
            }
        }
        [Category("自定义"), Description("文本框内文本")]
        public string TextBoxText
        {
            set
            {
                textBoxFront.Text = value;
                if (textBoxFront.Text != "")
                {
                    buttonClear.Visible = true;
                }
                else
                {
                    buttonClear.Visible = false;
                }
            }
            get
            {
                return textBoxFront.Text;
            }
        }
        private bool isAutoClear = true;
        [Category("自定义"), Description("是否执行清除")]
        public bool IsAutoClear
        {
            set
            {
                isAutoClear = value;
               
            }
            get
            {
                return isAutoClear;
            }
        }
        private bool textBoxReadOnly= true;
         [Category("自定义"), Description("文本框只读")]
       public bool TextBoxReadOnly
        {
            set
            {
                textBoxReadOnly= value;
                textBoxFront.ReadOnly= textBoxReadOnly;
                textBoxFront.ReadOnly= textBoxReadOnly;
            }
            get
            {
                return textBoxReadOnly;
            }
        }
        [Category("自定义"), Description("文本框背景色")]
        public Color TextBoxBackColor
        {
            set
            {
                textBoxBack.BackColor = value;
                textBoxFront.BackColor = value;
            }
            get
            {
                return textBoxBack.BackColor;
            }
        }
        /// /////////////////////////////////////////////

        public delegate void ClearButtonClickEventHandler(Object sender, EventArgs e);
        public event ClearButtonClickEventHandler ClearButtonClick; //声明事件
        public class ClearEventArgs : EventArgs
        {
            //将是否取消处理传递给订阅者
            public bool Handled;
            public ClearEventArgs()
            {
                this.Handled = false;
            }
        }
        protected virtual void OnClearButtonClick(EventArgs e)
        {
            if (ClearButtonClick != null)
            { // 如果有对象注册
                ClearButtonClick(this, e);  // 调用所有注册对象的方法
            }
        }


        private void buttonClear_Click(object sender, EventArgs e)
        {
            if (isAutoClear) textBoxFront.Text = "";
            OnClearButtonClick(e);  // 调用 OnButtonClick方法

        }
        /// /////////////////////////////////////////////

        private void textBoxContainButton_Enter(object sender, EventArgs e)
        {
            textBoxFront.Focus();
        }
        /// /////////////////////////////////////////////
        public delegate void TextBoxKeyPressEventHandler(Object sender, KeyPressEventArgs e);
        public event TextBoxKeyPressEventHandler TextBoxKeyPress; //声明事件
        protected virtual void OnTextBoxKeyPress(KeyPressEventArgs e)
        {
            if (TextBoxKeyPress != null)
            { // 如果有对象注册
                TextBoxKeyPress(this, e);  // 调用所有注册对象的方法
                
            }
        }

        private void textBoxBefore_KeyPress(object sender, KeyPressEventArgs e)
        {
            OnTextBoxKeyPress(e);  // 调用 OnButtonClick方法

        }
        /// 

        public delegate void TextBoxTextChangedEventHandler(Object sender, EventArgs e);
        public event TextBoxTextChangedEventHandler TextBoxTextChanged; //声明事件
        protected virtual void OnTextBoxTextChanged(EventArgs e)
        {
            if (TextBoxTextChanged != null)
            { // 如果有对象注册
                TextBoxTextChanged(this, e);  // 调用所有注册对象的方法
            }
        }

        private void textBoxBefore_TextChanged(object sender, EventArgs e)
        {
            if (textBoxFront.Text != "")
            {
                buttonClear.Visible = true;
            }
            else
            {
                buttonClear.Visible = false;
            }
            OnTextBoxTextChanged(e);  // 调用 OnButtonClick方法
        }



        /// /////////////////////////////////////////////




    }