[DevExpress]为TextEdit设置水印文字

关键代码：

        public static void SetWatermark(this TextEdit textEdit, string watermark)
        {
            textEdit.Properties.NullValuePromptShowForEmptyValue = true;
            textEdit.Properties.NullValuePrompt = watermark;
        }
        public static void ClearWatermark(this TextEdit textEdit)
        {
            if (textEdit.Properties.NullValuePromptShowForEmptyValue)
                textEdit.Properties.NullValuePrompt = string.Empty;
        }

测试代码：

        private void Form1_Load(object sender, EventArgs e)
        {
            textEdit1.SetWatermark("请输入用户名称....");
            textEdit2.SetWatermark("请输入用户密码....");
        }

        private void simpleButton1_Click(object sender, EventArgs e)
        {
            textEdit1.ClearWatermark();
            textEdit2.ClearWatermark();
        }

代码效果：

[DevExpress]为TextEdit设置水印文字