c# - 为一个元素设置样式表

Question

我有一个 web 用户控件的样式，我将它放在母版页的表单元素中。但是 webuser 控件的样式表会影响内容占位符中的所有其他元素。

这是发生的事情的图片:

* { box-sizing: border-box; padding:0;}

body {
    background: #333 url(../images/bg.jpg) repeat top left;
    font-family: Arial;
    color:white;
    font-size:12px;

}

form {
  background:#111; 
  width:300px;
  margin:30px auto;
  border-radius:0.4em;
  border:1px solid #191919;
  overflow:hidden;
  position:relative;
  box-shadow: 0 5px 10px 5px rgba(0,0,0,0.2);
}


.inset {
  padding:20px; 
  border-top:1px solid #19191a;
}

form h1 {
  font-size:18px;
  text-shadow:0 1px 0 black;
  text-align:center;
  padding:15px 0;
  border-bottom:1px solid rgba(0,0,0,1);
  position:relative;
}

input[type=text],
input[type=password] {
  width:100%;
  padding:8px 5px;
  background:linear-gradient(#1f2124, #27292c);
  border:1px solid #222;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.1);
  border-radius:0.3em;
  margin-bottom:20px;
}

label[for=remember]{
  color:white;
  display:inline-block;
  padding-bottom:0;
  padding-top:5px;
}

input[type=checkbox] {
  display:inline-block;
  vertical-align:top;
}


input[type=submit] {
  padding:5px 20px;
  border:1px solid rgba(0,0,0,0.4);
  text-shadow:0 -1px 0 rgba(0,0,0,0.4);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),
    inset 0 10px 10px rgba(255,255,255,0.1);
  border-radius:0.3em;
  background:#0184ff;
  color:white;
  float:right;
  font-weight:bold;
  cursor:pointer;
  font-size:13px;
}

input[type=submit]:hover {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),
    inset 0 -10px 10px rgba(255,255,255,0.1);
}

input[type=text]:hover,
input[type=password]:hover,
label:hover ~ input[type=text],
label:hover ~ input[type=password] {
  background:#27292c;
}

Answer 1

您可以通过 html 代码将类或 Id 添加到要覆盖的特定控件，并为此编写单独的 css，例如:

<form class="form-class"></form>

.form-class{
  background:#FFF; 
  width:500px;
  margin:30px auto;
  border-radius:0.4em;
  border:1px solid #191919;
  overflow:hidden;
  position:relative;
  box-shadow: 0 5px 10px 5px rgba(0,0,0,0.2);
}

然后检查您的输出，它仍然显示相同的结果，然后您已将 important 添加到所需的属性中，例如:

.form-class{
  background:#FFF !important; 
  width:500px !important;
  margin:30px auto;
  border-radius:0.4em;
  border:1px solid #191919;
  overflow:hidden;
  position:relative;
  box-shadow: 0 5px 10px 5px rgba(0,0,0,0.2);
}

这将帮助您覆盖 html Controller 上的特定 css。