DevExpress 为TextEdit设置水印文字

设置水印代码：

//设置水印值
public static void SetWatermark(this TextEdit textEdit, string watermark)
{
    textEdit.Properties.NullValuePromptShowForEmptyValue = true;
    textEdit.Properties.NullValuePrompt = watermark;
}

//清除水印值
public static void ClearWatermark(this TextEdit textEdit)
{
     if (textEdit.Properties.NullValuePromptShowForEmptyValue)
     textEdit.Properties.NullValuePrompt = string.Empty;
}

调用：

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();
        }

效果图：