/// <summary>
/// 获取最大值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <returns></returns>
public static T Max <T>(this Taskable <T> thisValue)
{
var isClass = typeof(T).IsClass;
if (isClass)
{
Check.Exception(isClass, "TaskExtensions.Max.thisValue T只能是为string和值类型。");
}
return(thisValue.Tasks.Select(it => it.Result.Value).Max());
}
/// <summary>
/// 如果序列中不包含任何元素，则返回默认值。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <returns></returns>
public static T ToFirstOrDefault <T>(this Taskable <T> thisValue) where T : class
{
var isClass = typeof(T).IsClass;
if (!isClass)
{
Check.Exception(isClass, "TaskExtensions.ToSingle.thisValue T只能为class。");
}
return(thisValue.MergeEntities <T>().FirstOrDefault());
}
/// <summary>
/// 将Task中的结果集合并成List集成
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <returns></returns>
public static List <T> ToList <T>(this Taskable <T> thisValue) where T : class
{
var isClass = typeof(T).IsClass;
if (!isClass)
{
Check.Exception(isClass, "TaskExtensions.ToList.thisValue T只能为class。");
}
return(thisValue.MergeEntities <T>());
}
/// <summary>
/// 将结果集合并到一个集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <returns></returns>
public static IEnumerable <DataRow> MergeTable <DataTable>(this Taskable <DataTable> thisValue)
{
var isDataTable = typeof(DataTable) == typeof(DataTable);
if (!isDataTable)
{
Check.Exception(isDataTable, "TaskExtensions.MergeTable.thisValue T只能为DataTable。");
}
var reval = thisValue.Tasks.SelectMany(it => it.Result.DataTable.AsEnumerable()).ToList();
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="sql"></param>
/// <param name="connectionStringList">连接字符串数组</param>
/// <param name="whereObj">参数 例如: new { id="1",name="张三"}</param>
/// <returns></returns>
public Taskable <T> Taskable <T>(string sql, List <string> connectionStringList, object whereObj = null)
{
Taskable <T> reval = new Taskable <T>();
reval.Sql = sql;
reval.WhereObj = whereObj;
var tasks = new Task <CloudSearchResult <T> > [connectionStringList.Count];
for (int i = 0; i < tasks.Length; i++)
{
CloudPubMethod.TaskFactory <CloudSearchResult <T> >(ti =>
{
string innerSql = sql;
var connString = connectionStringList[ti];
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 (innerSql.Contains("$:->connectionString<-:$"))
{
innerSql = innerSql.Replace("$:->connectionString<-:$", connString);
}
if (isDataTable)
{
itemReval.DataTable = db.GetDataTable(innerSql, whereObj);
}
else if (isClass)
{
itemReval.Entities = db.SqlQuery <T>(innerSql, whereObj);
}
else
{
var obj = db.GetScalar(sql, whereObj);
if (obj == DBNull.Value)
{
itemReval.Value = default(T);
}
else
{
obj = Convert.ChangeType(obj, typeof(T));
itemReval.Value = (T)obj;
}
}
itemReval.ConnectionString = connString;
return(itemReval);
}, tasks, i);
}
Task.WaitAll(tasks);
reval.Tasks = tasks;
return(reval);
}
/// <summary>
///是否存在这条记录
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static bool Any(this Taskable <int> thisValue)
{
return(thisValue.Tasks.Select(it => it.Result.Value).Count() > 0);
}
/// <summary>
/// 将结果集合并到一个集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <returns></returns>
public static List <T> MergeValue <T>(this Taskable <T> thisValue)
{
var reval = thisValue.Tasks.Select(it => it.Result.Value).ToList();
return(reval);
}
/// <summary>
/// 将结果集合并到一个集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="thisValue"></param>
/// <returns></returns>
public static List <T> MergeEntities <T>(this Taskable <T> thisValue) where T : class
{
var reval = thisValue.Tasks.SelectMany(it => it.Result.Entities).ToList();
return(reval);
}
/// <summary>
/// 获取count
/// </summary>
/// <param name="thisValue"></param>
/// <returns></returns>
public static int Count(this Taskable <int> thisValue)
{
return(thisValue.Tasks.Select(it => it.Result.Value).Sum());
}