/// <summary>
/// 创建关联一个强类型查询
/// </summary>
/// <typeparam name="TJoinResult"></typeparam>
/// <param name="resultSelect"></param>
/// <param name="expression"></param>
/// <param name="joinType"></param>
/// <returns></returns>
public ILambdaQueryViewJoin <T, TJoinResult> Join <TJoinResult>(ILambdaQueryResultSelect <TJoinResult> resultSelect, Expression <Func <T, TJoinResult, bool> > expression, JoinType joinType = JoinType.Inner)
{
if (!resultSelect.BaseQuery.__FromDbContext)
{
throw new Exception("关联需要由LambdaQuery.CreateQuery创建");
}
var query2 = new LambdaQueryViewJoin <T, TJoinResult>(this, resultSelect);
//var innerType = typeof(TSource);
var innerType = resultSelect.InnerType;
//var prefix1 = GetPrefix(innerType);
var prefix2 = GetPrefix(typeof(TJoinResult));
var typeQuery = new TypeQuery(innerType, prefix2);
var baseQuery = resultSelect.BaseQuery;
QueryParames.AddRange(baseQuery.QueryParames);
string innerQuery = baseQuery.GetQuery();
typeQuery.InnerQuery = innerQuery;
string condition = FormatJoinExpression(expression.Body);
AddInnerRelation(typeQuery, joinType, condition);
return(query2);
}
LambdaQuery <T> InnerSelect <TResult>(Expression <Func <T, TResult> > outField, LambdaQueryResultSelect <TResult> query, string type, string innerJoinSql = "")
{
if (!query.BaseQuery.__FromDbContext)
{
throw new CRLException("关联需要由LambdaQuery.CreateQuery创建");
}
var baseQuery = query.BaseQuery;
QueryParames.AddRange(baseQuery.QueryParames);
//foreach (var kv in baseQuery.QueryParames)
//{
// QueryParames[kv.Key] = kv.Value;
//}
var query2 = baseQuery.GetQuery();
return(InnerSelect(outField, query2, type));
}
