对象列表上的c# Order By
对象列表上的c# Order By
提问于 2018-10-24 04:58:34
我有一个包含多个字段的对象列表/集合。其中一个是文件名。
我正在根据文件名进行排序，但没有得到正确的结果。
列表：
"552939_VVIDEO9.mp4"
"552939_VVIDEO8.mp4"
"552939_VVIDEO13.mp4"
"552939_VVIDEO12.mp4"
"552939_VVIDEO7.mp4"
"552939_VVIDEO6.mp4"
"552939_VVIDEO2.mp4"
"552939_VVIDEO16.mp4"
"552939_VVIDEO10.mp4"
"552939_VVIDEO3.mp4"
"552939_VVIDEO11.mp4"
"552939_VVIDEO4.mp4"
"552939_VVIDEO1.mp4"
"552939_VVIDEO15.mp4"
"552939_VVIDEO14.mp4"
"552939_VVIDEO17.mp4"
List<WfVideo> orderVideo = ProductData.Videos.OrderBy(o => o.Filename, StringComparer.InvariantCultureIgnoreCase).ToList();我得到的结果是：
VOD1
VOD2
VVIDEO1
VVIDEO10
VVIDEO11
VVIDEO12
VVIDEO13
VVIDEO14
VVIDEO15
VVIDEO16
VVIDEO17
VVIDEO2
VVIDEO3
VVIDEO4
VVIDEO5
VVIDEO6排序有误吗？
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-10-24 06:21:12
如果你只想在数字之后对这些文件进行排序，你可以传递一个比较器来实现你想要的规则。这将根据文件名的编号对文件名进行排序：
List<string> files = new List<string>
{
"552939_VVIDEO9.mp4",
"552939_VVIDEO8.mp4",
"552939_VVIDEO13.mp4",
"552939_VVIDEO12.mp4",
"VOD1.mp4",
"552939_VVIDEO6.mp4",
"VOD2.mp4",
"552939_VVIDEO2.mp4",
"552939_VVIDEO16.mp4",
"552939_VVIDEO10.mp4",
"552939_VVIDEO3.mp4",
"552939_VVIDEO11.mp4",
"552939_VVIDEO4.mp4",
"552939_VVIDEO1.mp4",
"552939_VVIDEO15.mp4",
"552939_VVIDEO14.mp4",
"552939_VVIDEO17.mp4"
};
files.Sort((a, b) => {
int an = 0;
int bn = 1;
var regex = new Regex("([0-9]+).mp4", RegexOptions.IgnoreCase);
var aGroups = regex.Match(a).Groups;
var bGroups = regex.Match(b).Groups;
var aidx = aGroups.Count > 1 ? 1 : 0;
var bidx = bGroups.Count > 1 ? 1 : 0;
an = int.Parse(aGroups[aidx].Value);
bn = int.Parse(bGroups[bidx].Value);
if (an == bn)
return 0;
if (an < bn)
return -1;
return 1;
});
foreach (var file in files)
{
Console.WriteLine(file);
}
Console.ReadKey();输出：
VOD1.mp4
552939_VVIDEO1.mp4
VOD2.mp4
552939_VVIDEO2.mp4
552939_VVIDEO3.mp4
552939_VVIDEO4.mp4
552939_VVIDEO6.mp4
552939_VVIDEO8.mp4
552939_VVIDEO9.mp4
552939_VVIDEO10.mp4
552939_VVIDEO11.mp4
552939_VVIDEO12.mp4
552939_VVIDEO13.mp4
552939_VVIDEO14.mp4
552939_VVIDEO15.mp4
552939_VVIDEO16.mp4
552939_VVIDEO17.mp4注可能需要一些额外的错误检查。当然，您可以扩展这个比较器函数，使其适用于您想要的任何规则。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52957750
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