html - asp :TextBox change placeholder via . NET代码隐藏

Question

是否可以通过后面的 ASP.NET 代码更改文本框 placeholder？如果是，怎么办？

标记:

<asp:TextBox ID="TXTPassR" runat="server" CssClass="form-control" 
    placeholder="Enter password" TextMode="Password"></asp:Textbox>

代码隐藏:

if (Something)
{
   //Change placeholder
}

Answer 1

使用Attributes.Add() :

if (Something)
{
    TXTPassR.Attributes.Add("placeholder", "Some Text");
}

AttributeCollection.Add Method (String, String): Adds an attribute to a server control's AttributeCollection object.