Mongodb在CSharp里实现Aggregate
/// <summary>/// 返回UI消息树
/// </summary>
/// <returns></returns>
public static string GetMongoLog(DateTime? fromDate, DateTime? toDate, int page = 1)
{
string from = DateTime.Now.Date.ToString("yyyy-MM-dd");
string to = DateTime.Now.Date.AddDays(1).ToString("yyyy-MM-dd");
if (fromDate.HasValue)
{
from = fromDate.Value.ToString("yyyy-MM-dd");
}
if (toDate.HasValue)
{
to = toDate.Value.ToString("yyyy-MM-dd");
}
var stages = new List<IPipelineStageDefinition>();
stages.Add(new JsonPipelineStageDefinition<BsonDocument, BsonDocument>("{$match:{AddTime:{$gt:ISODate('" + from + "'),$lt:ISODate('" + to + "')}}}"));
stages.Add(new JsonPipelineStageDefinition<BsonDocument, BsonDocument>("{$group:{_id: \"$RootId\", count: {$sum: 1}}}"));
stages.Add(new JsonPipelineStageDefinition<BsonDocument, BsonDocument>("{$skip:" + page * 5 + "}"));
stages.Add(new JsonPipelineStageDefinition<BsonDocument, BsonDocument>("{$limit:5}"));
var pipeline = new PipelineStagePipelineDefinition<BsonDocument, BsonDocument>(stages);
var result = NoSql.MongodbManager<LoggerContext>.Collection.Aggregate(pipeline);
StringBuilder str = new StringBuilder();
str.Append("<ol>
foreach (var item in result.ToList())
{
var timer = new List<DateTime>();
var old = NoSql.MongodbManager<LoggerContext>.Instance.Find(i => i.RootId == item.Values.ToArray().ToString() && i.ParentId == null).FirstOrDefault();
timer.Add(old.AddTime);
str.Append("<li style='margin:5px;border:1px dashed #aaa'>");
str.AppendFormat("<span style='color:red;'>{0}</span><span style='color:green'>{1}</span><span>{2}</span>"
, old.Url
, old.MessageBody
, old.AddTime);
MsgTree(str, old.ChildId, timer);
str.AppendFormat("<p><b><em>本次请求用时{0}毫秒（{1}秒）<em></b></p>"
, (timer.Max() - timer.Min()).TotalMilliseconds
, (timer.Max() - timer.Min()).TotalSeconds);
str.Append("</li>");
}
str.Append("</ol>");
return str.ToString();
}
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