/// <summary>
/// 根据实体元数据Id和备用关键字名称查询备用关键字
/// </summary>
/// <param name="infoId"></param>
/// <param name="name"></param>
/// <returns></returns>
public async Task <EntityInfoAlternateKey> QueryByEntityInfoIdAndName(Guid infoId, string name)
{
EntityInfoAlternateKey info = null;
await DBTransactionHelper.SqlTransactionWorkAsync(DBTypes.SqlServer, true, false, _entityMetadataConnectionFactory.CreateReadForEntityMetadata(), async (conn, transaction) =>
{
SqlTransaction sqlTran = null;
if (transaction != null)
{
sqlTran = (SqlTransaction)transaction;
}
await using (SqlCommand commond = new SqlCommand()
{
Connection = (SqlConnection)conn,
CommandType = CommandType.Text,
Transaction = sqlTran,
CommandText = string.Format(@"SELECT {0},{1}
FROM [EntityInfoAlternateKey] AS ekey
INNER JOIN [EntityInfo] AS info
ON ekey.[entityinfoid] = info.[id]
WHERE info.[id] = @infoid
AND ekey.[name] = @name;", StoreHelper.GetEntityInfoAlternateKeySelectFields("ekey"), StoreHelper.GetEntityInfoSelectFields("info"))
})
{
var parameter = new SqlParameter("@infoid", SqlDbType.UniqueIdentifier)
{
Value = infoId
};
commond.Parameters.Add(parameter);
parameter = new SqlParameter("@name", SqlDbType.NVarChar, 256)
{
Value = name
};
commond.Parameters.Add(parameter);
commond.Prepare();
SqlDataReader reader = null;
await using (reader = await commond.ExecuteReaderAsync())
{
if (await reader.ReadAsync())
{
info = new EntityInfoAlternateKey();
StoreHelper.SetEntityInfoAlternateKeySelectFields(info, reader, "ekey");
info.EntityInfo = new EntityInfo();
StoreHelper.SetEntityInfoSelectFields(info.EntityInfo, reader, "info");
}
await reader.CloseAsync();
}
}
});
return(info);
}
/// <summary>
/// 为实体元数据备用关键字赋值
/// </summary>
/// <param name="queue"></param>
/// <param name="reader"></param>
/// <param name="prefix"></param>
public static void SetEntityInfoAlternateKeySelectFields(EntityInfoAlternateKey metadata, DbDataReader reader, string prefix)
{
metadata.ID = (Guid)reader[string.Format("{0}id", prefix)];
if (reader[string.Format("{0}name", prefix)] != DBNull.Value)
{
metadata.Name = reader[string.Format("{0}name", prefix)].ToString();
}
if (reader[string.Format("{0}entityinfoid", prefix)] != DBNull.Value)
{
metadata.EntityInfoId = (Guid)reader[string.Format("{0}entityinfoid", prefix)];
}
if (reader[string.Format("{0}createtime", prefix)] != DBNull.Value)
{
metadata.CreateTime = (DateTime)reader[string.Format("{0}createtime", prefix)];
}
if (reader[string.Format("{0}modifytime", prefix)] != DBNull.Value)
{
metadata.ModifyTime = (DateTime)reader[string.Format("{0}modifytime", prefix)];
}
}
