好的，我找到了一个临时解决方法:

Okay I found a temporary workaround for this:

filter:"样式的存在是导致所有background-image:"样式消失的原因，除了最后一个列出的样式.这并不是说它删除了它没有删除的东西知道，它只是删除了除列出的最后一个背景图像"样式之外的所有样式.必须是微软(预期)使过滤器和特定于 MS 的背景图像风格很好地结合在一起的方式，但是他们没有很好地编码.绝对是 MS VS 缺陷.要重现，只需右键单击具有类似代码的 CSS 类:

The existence of the "filter:" style is what's causing all of the "background-image:" styles to disappear except the last one listed. It's not that it's removing what it doesn't know, it's just removing all but the last "background-image" style listed. Must be Microsoft (intended) way of making filter and an MS specific background-image style play nicely together, however they didn't code it up very well. Definitely a MS VS defect. To repro, just right click in the CSS class that has code similar to this:

background-color: #EBEBEB; /* Fallback background color for non supported browsers */  
background-image: -webkit-gradient(linear, left top, right top, from(#FFFFFF), to(#DAD6E7));  
background-image: -webkit-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: -moz-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: -ms-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: -o-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: linear-gradient(left, #FFFFFF, #DAD6E7);  
filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#FFFFFF', EndColorStr='#DAD6E7', gradientType='1'); /* IE6 - IE9 */

然后选择构建样式...".然后单击确定"而不更改任何内容并观察它删除除最后一个背景图像之外的所有内容.尝试更改背景图像样式"的顺序并将 webkit 放在最后，然后自己查看.

and then select "Build Style...". Then click "OK" without changing anything and watch it remove all but the last background-image left. Try changing the order of the "background-image styles and leave webkit last and then see for yourself.

您会注意到，如果您删除过滤器:"样式，问题就会消失，但是我们需要(对于此示例)，因此解决方案似乎将过滤器:"样式移到了所有背景图像:"行.一旦你这样做了，它就会让他们独自一人，问题就消失了.

将上面的 CSS 更改为此似乎可以缓解问题:

Changing the above CSS to this seems to aleviate the problem:

filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#FFFFFF', EndColorStr='#DAD6E7', gradientType='1'); /* IE6 - IE9 */
background-color: #EBEBEB; /* Fallback background color for non supported browsers */  
background-image: -webkit-gradient(linear, left top, right top, from(#FFFFFF), to(#DAD6E7));  
background-image: -webkit-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: -moz-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: -ms-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: -o-linear-gradient(left, #FFFFFF, #DAD6E7);  
background-image: linear-gradient(left, #FFFFFF, #DAD6E7);  

更新:上面的解决方法仅适用于当您使用构建样式..."->修改样式"对话框时 VS 应用格式时，因为我刚刚再次看到它并修复了上面的内容，所以它必须来自其他东西.

UPDATE: The workaround above only works for when VS applies formatting when you're using the "Build Style..." --> "Modify Style" dialog because I just saw it again with the fix above in place so it must be from somthing else.