使用 flexbox 第三列向左推的 3 列流体布局

Question

我正在尝试使用 CSS flexbox 属性来制作完整的布局。我正在尝试设计一个 3 列的流体布局，但我的尝试似乎并不正确。样式表如下。

一些背景信息：我在 c# ASP.NET 中进行设计。所以我的 HTML 中有一些代码，可以很容易地（对我来说）拥有带有主布局的可变内容。基本上只有菜单点击时的内容会发生变化，其余的在整个网站上保持不变。

.MainContainer{
display: flex;
flex-direction: column;
border-style: solid; /*Debugging purposes*/
}

.ContentContainer{
width: 100%;
fill:aliceblue;
display: flex;
flex-direction: row;
border-style: solid; /*Debugging purposes*/
}

.header{
width: 100%;
height: 15%;
text-align: center;
border-style: solid; /*Debugging purposes*/
}

.footer{
width: 100%;
height: 15%;
text-align: center;
border-style: solid; /*Debugging purposes*/
 }

.navbar{
display: flex;
width: 15%;
align-self: stretch;
align-items: center;
flex-direction: column;
padding:2px;
margin: 10px;

min-width: 15%;

border-style: solid; /*Debugging purposes*/
 }

.content{
display: flex;
align-self: stretch;
width: 95%;
padding:10px;
margin: 10px;
text-align: justify;

min-width: 90%;
overflow:hidden;

border-style: solid; /*Debugging purposes*/
}

.aside{
display: flex;
width: 15%;
align-self: stretch;
align-items: center;
flex-direction: column;
margin: 10px;
padding: 10px;

min-width: 15%;

border-style: solid; /*Debugging purposes*/
}

HTML编码：

<div class="header">This is the Header space</div>

<div class="ContentContainer">
    <nav class="navbar">
        <a href="Home.aspx">Home</a>
        <a href="About.aspx">About</a>
        <a href="Contact.aspx">Contact</a>
    </nav>

<%--    start of variable content--%>
    <form id="form1" runat="server">
        <div class="content">
            <asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">

            </asp:ContentPlaceHolder>
        </div>
    </form>
<%--    end of variable content--%>

    <div class="aside">Content Area for Latest items.</div>
</div>

<div class="footer">Tis is the Footer space</div>

问题出在这里：只要是有点空的页面，它就不会保留所需的宽度。旁边的 div 将尽可能向左推。此外，看起来页眉高度和页脚高度不占屏幕尺寸的 15%。

任何指向正确方向的指针？提前致谢

Answer 1

如果我没理解错的话，我想这就是你想要的：

.MainContainer{
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.ContentContainer{
  display: flex;
  justify-content: space-between;
  flex-direction: row;
}

.header{
  display: flex;
  justify-content: center;
  width: 100%;
  height: 15%;
  text-align: center;
  border-style: solid; /*Debugging purposes*/
}

.footer{
  display: flex;
  justify-content: center;
  width: 100%;
  height: 15%;
  text-align: center;
  border-style: solid; /*Debugging purposes*/
 }

.navbar{
  display: flex;
  width: 15%;
  align-items: center;
  flex-direction: column;
  padding:2px;
  margin: 10px;
  border-style: solid; /*Debugging purposes*/
}

.content{
  display: inline-block;
  flex: 1;
  padding:10px;
  margin: 10px;
  text-align: justify;
  border-style: solid; /*Debugging purposes*/
}

.aside{
  display: flex;
  width: 15%;
  align-items: center;
  flex-direction: column;
  margin: 10px;
  padding: 10px;
  border-style: solid; /*Debugging purposes*/
}

<div class="MainContainer">
  <div class="header">This is the Header space</div>
  <div class="ContentContainer">
	<nav class="navbar">
	  <a href="Home.aspx">Home</a>
	  <a href="About.aspx">About</a>
	  <a href="Contact.aspx">Contact</a>
	</nav>
	<div class="content">
	</div>
	<div class="aside">Content Area for Latest items.</div>
  </div>

  <div class="footer">Tis is the Footer space</div>
</div>