/// <summary>
/// 获取平均值
/// </summary>
/// <param name="thisValue"></param>
/// <param name="count"></param>
/// <returns></returns>
public static double Avg(this TaskableWithCount <double> thisValue)
{
var count = thisValue.Tasks.Select(it => it.Result.Count).Sum();
if (count == 0)
{
return(0);
}
var reval = thisValue.Tasks.Select(it => it.Result.Value * it.Result.Count).Sum() / count;
return(reval);
}
/// <summary>
/// 多线程请求所有数据库节点，同步汇总结果
/// </summary>
/// <typeparam name="T">支持DataTable、实体类和值类型</typeparam>
/// <param name="sqlSelect">sql from之前（例如： "select count(*)" ）</param>
/// <param name="sqlEnd">sql from之后（例如： "from table where id=1" </param>
/// <param name="whereObj">参数 例如: new { id="1",name="张三"}</param>
/// <returns></returns>
public TaskableWithCount <T> TaskableWithCount <T>(string sqlSelect, string sqlEnd, object whereObj = null)
{
TaskableWithCount <T> reval = new TaskableWithCount <T>();
reval.Sql = sqlSelect + sqlEnd;
reval.WhereObj = whereObj;
var tasks = new Task <CloudSearchResult <T> > [configList.Count];
for (int i = 0; i < tasks.Length; i++)
{
CloudPubMethod.TaskFactory <CloudSearchResult <T> >(ti =>
{
var connString = configList[ti].ConnectionString;
var db = new SqlSugarClient(connString);
SettingConnection(db);
CloudSearchResult <T> itemReval = new CloudSearchResult <T>();
var isDataTable = typeof(T) == typeof(DataTable);
var isClass = typeof(T).IsClass;
if (isClass)
{
itemReval.Entities = db.SqlQuery <T>(reval.Sql, whereObj);
}
else if (isDataTable)
{
itemReval.DataTable = db.GetDataTable(reval.Sql, whereObj);
}
else
{
var obj = db.GetScalar(reval.Sql, whereObj);
obj = Convert.ChangeType(obj, typeof(T));
itemReval.Value = (T)obj;
}
itemReval.Count = db.GetInt("SELECT COUNT(1)" + sqlEnd);;
itemReval.ConnectionString = connString;
return(itemReval);
}, tasks, i);
}
Task.WaitAll(tasks);
reval.Tasks = tasks;
return(reval);
}