在BlogEngine.Net 1.0中, Post的链接是根据Post.Title来判断的, 获取Post的相对Uri属性RelativeLink时, 关键语句是Utils.RemoveIlegalCharacters(Title),我们先看看RemoveIlegalCharacters()方法:
/// Strips all illegal characters from the specified title.
/// </summary>
public static string RemoveIlegalCharacters(string text)
{
if (string.IsNullOrEmpty(text))
return text;
StringBuilder sb = new StringBuilder();
text = text.Replace(" ", "-");
foreach (char c in text)
{
if (IsAllowedCharacter(c))
sb.Append(c);
}
return sb.ToString();
}
private static bool IsAllowedCharacter(char character)
{
string allowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-";
foreach (char c in allowedChars)
{
if (c == character)
return true;
}
return false;
}
如果标题中有上述字符还行,要是全部由非上述字符组成的话, 如Utils.RemoveIlegalCharacters("中文标题"), 看到的链接将会是"/post/.aspx", 当有两篇全中文标题的Post时, 之前的那篇Post将不能被链接到.
为了这个解决这个问题, 我作了一些修改, 思路大概如下:
1. 当标题中包含"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-"这类字符时, 按原方式进行;
2. 当标题由非""abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-" 字符组成的, 则使用Post.Id进行链接, 链接的形式如: "/post/a9d8c39d-c731-43bc-9ac6-faeafcfe0fcf.aspx".
修改步骤1: 在打开BlogEngine.Net的源代码Post.cs, 修改 RelativeLink属性的实现:
/// A relative-to-the-site-root path to the post.
/// Only for in-site use.
/// </summary>
public Uri RelativeLink
{
//get { return new Uri(VirtualPathUtility.ToAbsolute("~/post/" + Utils.RemoveIlegalCharacters(Title) + ".aspx"), UriKind.Relative); }
//当标题全部字符都是非ASCII码字符时，URL形式为: /post/a9d8c39d-c731-43bc-9ac6-faeafcfe0fcf.aspx
//其中a9d8c39d-c731-43bc-9ac6-faeafcfe0fcf是Post的Id的字符串形式
//改进，支持非ASCII码字符标题 --Start
get
{
string link = Utils.RemoveIlegalCharacters(Title);
if (link.Length == 0)
{
return new Uri(VirtualPathUtility.ToAbsolute("~/post/" + Id.ToString() + ".aspx"), UriKind.Relative);
}
return new Uri(VirtualPathUtility.ToAbsolute("~/post/" + link + ".aspx"), UriKind.Relative);
}
//改进，支持非ASCII码字符标题 --End
}
步骤2: 打开UrlRewrite.cs, 修改RewritePost()方法:
{
//string title = ExtractTitle(context, "/post/");
//Post post = Post.GetPostByName(title);
//if (post != null)
// context.RewritePath("~/post.aspx?id=" + post.Id.ToString() + GetQueryString(context), false);
//当标题全部字符都是非ASCII码字符时，URL形式为: /post/a9d8c39d-c731-43bc-9ac6-faeafcfe0fcf.aspx
//其中a9d8c39d-c731-43bc-9ac6-faeafcfe0fcf是Post的Id的字符串形式
//改进，支持非ASCII码字符标题 --Start
string title = ExtractTitle(context, "/post/");
Post post = Post.GetPostByName(title);
if (post != null)
{
context.RewritePath("~/post.aspx?id=" + post.Id.ToString() + GetQueryString(context), false);
return;
}
post = Post.GetPost(new Guid(title));
if (post != null)
{
context.RewritePath("~/post.aspx?id=" + post.Id.ToString() + GetQueryString(context), false);
}
//改进，支持非ASCII码字符标题 --End
}
步骤3: 重新编译, 运行并测试: 
成功!!!
类似地, 还可以修改Category, Tag等等....
希望这篇文章对你有用.
PS: 1.1版本已经修复了Title和Category的中文链接问题, 而Tag的中文链接问题的修复方法:
修改App_Code/Controls/TagCloud.cs中的RenderControl()方法替换成如下方法即可.
/// <summary>
/// Renders the control.
/// </summary>
public override void RenderControl(HtmlTextWriter writer)
{
writer.Write("<ul id=\"tagcloud\">");
foreach (string key in WeightedList.Keys)
{
writer.Write("<li>");
writer.Write(string.Format(LINK, Utils.RelativeWebRoot + "?tag=/" + HttpUtility.UrlEncode(key), WeightedList[key], "Tag: " + key, key));
writer.Write("</li>");
}
writer.Write("</ul>");
writer.Write(Environment.NewLine);
}
What is a gravatar?
A gravatar, or globally recognized avatar, is quite simply an 80×80 pixel avatar image that follows you from weblog to weblog appearing beside your name when you comment on gravatar enabled sites. Avatars help identify your posts on web forums, so why not on weblogs?
更多可看：http://site.gravatar.com/调用的一般方法：
http://www.gravatar.com/avatar.php?gravatar_id=95b9d41231617a05ced5604d242c9670
当然，95b9d41231617a05ced5604d242c9670就是对Email进行MD5的散列加密值：MD5(fengmk2@gmail.com)
还可以设置Rating和Size两个参数，若有兴趣，可查看下面的链接：
http://site.gravatar.com/site/implement#section_1_1
BlogEngine.Net中包含了一些有用和有趣的第三方功能，譬如还有coComment ，有兴趣的可去试试。