代碼 public?class?Post?:?IComparable<Post>
{
????private?string?id?=?string.Empty;
????private?string?title?=?string.Empty;
????private?int?orderby;

????public?string?ID
????{
????????get
????????{
????????????return?id;
????????}
????????set
????????{
????????????id?=?value;
????????}
????}
????public?string?Title
????{
????????get
????????{
????????????return?title;
????????}
????????set
????????{
????????????title?=?value;
????????}
????}
????public?int?OrderBy
????{
????????get
????????{
????????????return?orderby;
????????}
????????set
????????{
????????????orderby?=?value;
????????}
????}

????#region?IComparable<Post>?成員

????public?int?CompareTo(Post?other)
????{
????????return?(?orderby-?other.orderby);
????}

????#endregion
}

讓類繼承IComparable接口，并且實(shí)現(xiàn)接口，在實(shí)現(xiàn)接口方法中設(shè)置為順序排序

?

#region?IComparable<Post>?成員

????public?int?CompareTo(Post?other)
????{
????????return?(?orderby-?other.orderby);
????}

??#endregion

?

倒序可以設(shè)置為

?

#region?IComparable<Post>?成員

????public?int?CompareTo(Post?other)
????{
????????return?(?other.orderby-?orderby);
????}

????#endregion

?

默認(rèn)實(shí)現(xiàn)泛型類型排序可以是使用List<T>.Sort()比如

?

代碼 ???????List<Post>?posts?=?new?List<Post>();
????????for?(int?i?=?0;?i?<?10;?i++)
????????{
????????????Post?post?=?new?Post();
????????????post.ID?=?i.ToString();
????????????post.Title?=?"哈哈";
????????????post.OrderBy?=?i;
????????????posts.Add(post);
????????}
????????//排序
????????posts.Sort();
????????foreach?(Post?p?in?posts)
????????{
????????????Response.Write(p.ID?+?"<br>");
????????}

?

我們可以看到輸出的結(jié)果

0

1

.

.

.

10

如果我們其它屬性排序比如ID,TITLE則如何實(shí)現(xiàn)？

?

代碼 List<Post>?posts?=?new?List<Post>();
????????for?(int?i?=?0;?i?<?10;?i++)
????????{
????????????Post?post?=?new?Post();
????????????post.ID?=?i.ToString();
????????????post.Title?=?"哈哈";
????????????post.OrderBy?=?i;
????????????posts.Add(post);
????????}
????????//排序
????????//posts.Sort();
????????posts.Sort(delegate(Post?p1,?Post?p2)
????????????{
????????????????return?p2.ID.CompareTo(p1.ID);
????????????}
????????);
????????foreach?(Post?p?in?posts)
????????{
????????????Response.Write(p.ID?+?"<br>");
????????}

?

?

?

轉(zhuǎn)載于:https://www.cnblogs.com/nosnowwolf/archive/2006/11/13/559173.html

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