文本框的初始化界面

 1:文本的初始化
  private void Init()
        {
            textBoxX1.Text = "域名";//给文本赋值
            textBoxX1.Tag = "域名";//文本的tag值
            textBoxX1.ForeColor = Color.Silver;//设置文本框字体的颜色
            textBoxX1.TextAlign = HorizontalAlignment.Center;//设置文本框文本居中
            textBoxX2.Tag = "姓名";
            textBoxX2.Text = "姓名";
            textBoxX2.ForeColor = Color.Silver;
            textBoxX2.TextAlign = HorizontalAlignment.Center;
            this.textBoxX1.Leave += new System.EventHandler(this.textBox_Leave);//失去文本框的焦点事件
            this.textBoxX1.Enter += new System.EventHandler(this.textBox_Enter);//获取文本框的焦点事件
            this.textBoxX2.Leave += new EventHandler(textBox_Leave);
            this.textBoxX2.Enter += new EventHandler(textBox_Enter);
        }
2:获取文本框的焦点事件
        /// <summary>
        /// 文本获取焦点的事件
        /// </summary>
        /// <param name="sender">代表引发事件的控件</param>
        /// <param name="e">代表引发事件的参数</param>
        private void textBox_Enter(object sender, EventArgs e)
        {
            TextBoxX tb = (sender as TextBoxX);//获取引发的控件信息
            if (tb.Text == tb.Tag.ToString())//判断点击的控件的文本值是否为初始化
            {
                tb.Text = "";//清空文本
                tb.ForeColor = Color.Black;//改变文本字体的颜色
            }
        }
3：失去文本框的焦点事件
   private void textBox_Leave(object sender, EventArgs e)
        {
            TextBoxX tb = (sender as TextBoxX);
            if (tb.Text == "")
            {
                tb.Text = tb.Tag.ToString();
                tb.ForeColor = Color.Silver;
            }
        }

4：

public class TextControlInit
    {
        //构造函数传入时间控件
        public TextControlInit(MonthCalendarAdv mca)
        {
            mcTime = mca;
        }

        private MonthCalendarAdv mcTime;

        /// <summary>
        /// 绑定时间控件文本框的鼠标点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void txtTime_MouseClick(object sender, MouseEventArgs e)
        {
            if (mcTime.Visible)//如果时间控件是显示就结束
            {
                return;
            }
            TextBoxX tb = sender as TextBoxX;
            if (tb.Text == tb.Tag.ToString ())//判断获取的控件的Tag值是否与当前的Text相等
            {
                tb.Text = "";
                tb.ForeColor = Color.Black;
            }
            mcTime.Tag = tb;
            mcTime.Visible = true;
        }

        public void txtTime_Leave(object sender, EventArgs e)
        {
            TextBoxX tb = sender as TextBoxX;
            if (tb.Text == "")
            {
                tb.Text = tb.Tag.ToString();
                tb.ForeColor = Color.Silver;
            }
            else
            {
                string beginTime = tb.Text.Trim();
                try
                {
                    DateTime dt = Convert.ToDateTime(beginTime);
                }
                catch (Exception)
                {
                    tb.Text = DateTime.Now.ToShortDateString();
                }
            }
            mcTime.Visible = false;
        }

        public void txtTime_Enter(object sender, EventArgs e)
        {
            if (mcTime.Visible)
            {
                return;
            }
            TextBoxX tb = sender as TextBoxX;
            if (tb.Text == tb.Tag.ToString())
            {
                tb.Text = "";
                tb.ForeColor = Color.Black;
            }
            mcTime.Tag = tb;
            mcTime.Visible = true;
        }

        public void TextBox_Leave(object sender, EventArgs e)
        {
            TextBoxX tb = sender as TextBoxX;
            if (tb.Text == "")
            {
                tb.Text = tb.Tag.ToString();
                tb.ForeColor = Color.Silver;
            }
        }
        public void TextBox_Enter(object sender, EventArgs e)
        {
            TextBoxX tb = sender as TextBoxX;
            if (tb.Text == tb.Tag.ToString())
            {
                tb.Text = "";
                tb.ForeColor = Color.Black;
            }
        }

        public void mcTime_DateSelected(object sender, DateRangeEventArgs e)
        {
            TextBoxX tb = mcTime.Tag as TextBoxX;
            tb.Text = e.Start.ToShortDateString();
            if (tb.Text != "")
            {
                mcTime.Visible = false;
            }
        }
    }