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更新时间：2023-11-16 18:49:58
就像您只需清除浮动广告。
你可以通过添加 overflow：hidden 到 #container
学习如何以及何时清除浮动是CSS的重要组成部分。如果你能尽快掌握它，而不是以后，你会为自己节省很多困惑。
Does anyone know why my 'container' div isn't showing the white bg-color from it's parent divs? I'm getting the black (Lime in my example for better description) bg-color from the CSS body setting.
Please excuse the sloppy styling. I did my best to reduce the code and show relative stuff. BTW, I've tried making the 'container' div and it's child divs' style bg-color white; and it still doesn't work. When I give the highest div a large height attribute (say 1000px), it shows white to that point, but I thought I didn't have to do that. It should be dynamic: as the controls within the div expand, the divs height should expand as well. I have many pages like that, but don't have this problem.. but this is the only pg where I attempt column divs. And it happens right when my 'container' div for the columns start (see pic). and yea, this happens in FF and chrome. it works fine in IE
<head runat="server">
<title>Loaner Transfer</title>
<link rel="stylesheet" type="text/css" href="../styles/BodyLayout.css" />
<link rel="stylesheet" type="text/css" href="../styles/columns.css" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<script language="javascript" type="text/javascript">
....
</script>
</head>
<body>
<center>
<div style="text-align:left; width:1160px; background-color:White; border-bottom-width:25px;">
<div id="divBody">
<form id="form1" runat="server">
<ajx:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</ajx:ToolkitScriptManager>
<img src="../images/_Logo.gif" alt="Logo" /><br />
<UI:Header ID="UIHeader" runat="server" />
<UI:Menu ID="UIMenu" runat="server" />
<center>
<h1>Transfer Loaned Items</h1>
<asp:Label ID="lblStatus" runat="server" ForeColor="red"></asp:Label>
<br />
<asp:ValidationSummary ID="ValidationSummary1" runat="server" ValidationGroup="ISO" />
<asp:ValidationSummary ID="ValidationSummary3" runat="server" ValidationGroup="add" />
<asp:ValidationSummary ID="ValidationSummary2" runat="server" ValidationGroup="header" />
</center>
<br />
<div id="container" style="width:1140px;">
<div id="col1" style="width:400px;">
<h2 style="text-decoration:underline; text-align:center;">Search and select items to transfer</h2>
<div style="margin-left:25px;">
<asp:Label ID="Label1" runat="server" Font-Bold="true" Text="Pull ISO"></asp:Label>
<asp:CustomValidator ID="CVSearch" runat="server" ErrorMessage="Invalid ISO entry."
ControlToValidate="txtSearchISO" ValidationGroup="ISO" ValidateEmptyText="true"
ClientValidationFunction="CheckMyText">*</asp:CustomValidator>
<asp:TextBox ID="txtSearchISO" runat="server" Width="50px"></asp:TextBox>
<asp:Button ID="btnSearchISO" runat="server" Text="Go!" ValidationGroup="ISO" OnClick="btnSearchISO_Click" />
<asp:Label ID="lblHidISO" runat="server" Text="-1" Visible="false"></asp:Label>
<br />
<br />
<table>
.....
</table>
<br />
<center>
<asp:DataGrid.............................</asp:DataGrid>
</center>
</div>
<div id="col2outer" style="width:710px;">
<center>
<!--tables, controls, etc-->
</center>
</center>
</div>
</div>
</form>
</div>
</div>
</center>
</body>
Here is my CSS:
body
{
background-color:Black;
}
body.comp
{
background-color:#F5FCFF;
}
#divBody
{
margin-left:25px;
}
#divTrans
{
margin:15px;
}
#container #col1
{
float: left;
}
#container #col2outer
{
float: right;
}
#container #footer
{
text-align:center;
float: left;
width: 870px;
}
Here is a ss:
It looks like you simply need to clear your floats.
You can do this by adding overflow: hidden to #container (or perhaps #divBody).
Some further information about clearing floats:
Learning how and when to clear floats is an important part of CSS. You'll save yourself a lot of confusion if you get to grips with it sooner rather than later.