asp MVC在TextBoxFor（）中添加标题

Question

我正在为我的网站制作一个注册表，目前我就是这样的 并且代码是：

@Html.Label("Firstname")
@Html.TextBoxFor(model => model.Firstname, new {@required = "require", @style = "width:75%;", @class = "form-control" })
@Html.ValidationMessageFor(model => model.Firstname, null, new { @style = "color:red;" })
<br />
@Html.Label("Surname")
@Html.TextBoxFor(model => model.Lastname, new { @required = "require", @style = "width:75%;", @class = "form-control" })
@Html.ValidationMessageFor(model => model.Lastname, null, new { @style = "color:red;" })
<br /> . . . 

我想要做的是添加标题例如＆＃34;名字＆＃34;在文本框内，当输入数据时，它会消失，看起来像这样

我尝试过添加：

@name ="FirstName"
@label ="FirstName"
@title ="FirstName"

但所有这些都没有做任何事情。

Answer 1

您在谈论placeholder。它是一个HTML属性，只需将其添加到自定义htmlAttributes参数中即可：

@Html.TextBoxFor(model => model.Firstname, new {@required = "require", @style = "width:75%;", @class = "form-control", placeholder = "First Name" })

Answer 2

您似乎在寻找Html5 placeholder attribute

@Html.TextBoxFor(model => model.Firstname, new {@required = "require", @style = "width:75%;", @class = "form-control", placeholder = "First Name" })

Answer 3

这会为您的TextBox

添加默认值

@Html.TextBoxFor(model => model.Firstname, new {@required = "require", 
                                                @style = "width:75%;", 
                                                @class = "form-control", 
                                                @value = "FirstName"})

或者，如果您希望它在进入文本框时消失，

@Html.TextBoxFor(model => model.Firstname, new {@required = "require", 
                                                @style = "width:75%;", 
                                                @class = "form-control", 
                                                placeholder = "FirstName"})