C# textbox控件添加上提示文字

C# textbox控件添加上提示文字

首先Boolean textboxHasText = false;//判断输入框是否有文本

private void Textbox_Enter(object sender, EventArgs e)       
{           
        if (textboxHasText == false)               
                Textbox.Text = "";            //为空
                Textbox.ForeColor = Color.Black;       //颜色
}       

       //textbox失去焦点的事件方法
        private void Textbox_Leave(object sender, EventArgs e)       
        {           
                if (Textbox.Text == "")           
                {               
                        Textbox.Text = "你要让他提示内容";               
                        Textbox.ForeColor = Color.LightGray;   //颜色            
                        textboxHasText = false;           
                }           
                else               
                textboxHasText = true;       

        }