winform给textBox控件设置默认值

//设置文本框的默认值private const string DEFAULT_TEXT = "YYYY-mm-dd";/// <summary>/// 设置窗口一加载，文本框的样式/// </summary>public void SetAttribute(){WriteDate.Text = DEFAULT_TEXT;//设置默认值WriteDate.ForeColor = Color.LightGray;//前景色设置为浅灰色}private void SQLGetTime_Load(object sender, EventArgs e){SetAttribute();//窗体一加载就设置文本框的默认状态，}/// <summary>/// 文本框获取焦点事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void WriteDate_Enter(object sender, EventArgs e){WriteDate.Text = "";//文本框一获取焦点默认值就消失WriteDate.ForeColor = Color.Black;//前景色设置为黑色}/// <summary>/// 文本框失去焦点事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void WriteDate_Leave(object sender, EventArgs e){if (String.IsNullOrEmpty(WriteDate.Text))//如果文本框为空时{SetAttribute();//设置默认值}}