ASP MVC添加TextBoxFor（）

Question

我想提出一個登記表，我的網站，目前我有像這樣 和代碼是內部的一個標題：

@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 /> . . . 

我是什麼試圖做的是添加標題，例如「名」文本框裏面，輸入數據時，它會消失，看起來像這樣

我曾嘗試加入：

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

但所有這些沒有做任何事。

Answer 1

您正在談論placeholder。這是一個HTML屬性，只需將其添加到自定義htmlAttributes參數，爲例：

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

Answer 2

這將默認值添加到您的TextBox

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

或者，如果你希望它在進入文本框

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

Answer 3

好像你正在尋找HTML5的placeholder attribute

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

dissapear