How to query multiple table from SqlQuery() method in entity framework 6.0?
0
Say I have two table: Table_1 and Table_2,
I want to query the result into Model
public class Model
public Table_1 table1 get; set;
public Table_2 table2 get; set;
void Query(Database database)
string sql = @"SELECT table1.*, table2.* FROM Table_1 table1 JOIN Table_2 table2 on table1.ID=table2.ParentID";
var result = database.SqlQuery<Model>(sql).ToArray();
but these two properties always keep null in result, how can I make them filled? or this is not supported in EF?
entity-framework
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
add a comment |
0
Say I have two table: Table_1 and Table_2,
I want to query the result into Model
public class Model
public Table_1 table1 get; set;
public Table_2 table2 get; set;
void Query(Database database)
string sql = @"SELECT table1.*, table2.* FROM Table_1 table1 JOIN Table_2 table2 on table1.ID=table2.ParentID";
var result = database.SqlQuery<Model>(sql).ToArray();
but these two properties always keep null in result, how can I make them filled? or this is not supported in EF?
entity-framework
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
Is there a reason you cannot map entities and the relationship between these entities in Entity Framework? The code you have outlined looks like ADO.
– Steve Py
Nov 12 '18 at 5:09
@Steve Py Because query via EF is slow but directly query via script is fast for about 400,000 data in sql server with no reason, I want to found out by comparing.
– runerback
Nov 12 '18 at 9:53
What is the EF query that is slow? Have you run a profiler against it an extracted the exact SQL that EF is executing? Writing an SQL statement that you think is equivalent and finding that faster than EF can be useful for comparison, but first you need to inspect exactly what EF is generating in your situation. 99 times out of 100 it doesn't require trying to customize EF's querying, but rather something unexpected happening due to configuration or how you're consuming the entities.
– Steve Py
Nov 12 '18 at 10:24
add a comment |
0
0
0
Say I have two table: Table_1 and Table_2,
I want to query the result into Model
public class Model
public Table_1 table1 get; set;
public Table_2 table2 get; set;
void Query(Database database)
string sql = @"SELECT table1.*, table2.* FROM Table_1 table1 JOIN Table_2 table2 on table1.ID=table2.ParentID";
var result = database.SqlQuery<Model>(sql).ToArray();
but these two properties always keep null in result, how can I make them filled? or this is not supported in EF?
entity-framework
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
Say I have two table: Table_1 and Table_2,
I want to query the result into Model
public class Model
public Table_1 table1 get; set;
public Table_2 table2 get; set;
void Query(Database database)
string sql = @"SELECT table1.*, table2.* FROM Table_1 table1 JOIN Table_2 table2 on table1.ID=table2.ParentID";
var result = database.SqlQuery<Model>(sql).ToArray();
but these two properties always keep null in result, how can I make them filled? or this is not supported in EF?
entity-framework
entity-framework
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
asked Nov 12 '18 at 3:19
runerbackrunerback
23329
23329
Is there a reason you cannot map entities and the relationship between these entities in Entity Framework? The code you have outlined looks like ADO.
– Steve Py
Nov 12 '18 at 5:09
@Steve Py Because query via EF is slow but directly query via script is fast for about 400,000 data in sql server with no reason, I want to found out by comparing.
– runerback
Nov 12 '18 at 9:53
What is the EF query that is slow? Have you run a profiler against it an extracted the exact SQL that EF is executing? Writing an SQL statement that you think is equivalent and finding that faster than EF can be useful for comparison, but first you need to inspect exactly what EF is generating in your situation. 99 times out of 100 it doesn't require trying to customize EF's querying, but rather something unexpected happening due to configuration or how you're consuming the entities.
– Steve Py
Nov 12 '18 at 10:24
add a comment |
Is there a reason you cannot map entities and the relationship between these entities in Entity Framework? The code you have outlined looks like ADO.
– Steve Py
Nov 12 '18 at 5:09
@Steve Py Because query via EF is slow but directly query via script is fast for about 400,000 data in sql server with no reason, I want to found out by comparing.
– runerback
Nov 12 '18 at 9:53
What is the EF query that is slow? Have you run a profiler against it an extracted the exact SQL that EF is executing? Writing an SQL statement that you think is equivalent and finding that faster than EF can be useful for comparison, but first you need to inspect exactly what EF is generating in your situation. 99 times out of 100 it doesn't require trying to customize EF's querying, but rather something unexpected happening due to configuration or how you're consuming the entities.
– Steve Py
Nov 12 '18 at 10:24
Is there a reason you cannot map entities and the relationship between these entities in Entity Framework? The code you have outlined looks like ADO.
– Steve Py
Nov 12 '18 at 5:09
Is there a reason you cannot map entities and the relationship between these entities in Entity Framework? The code you have outlined looks like ADO.
– Steve Py
Nov 12 '18 at 5:09
@Steve Py Because query via EF is slow but directly query via script is fast for about 400,000 data in sql server with no reason, I want to found out by comparing.
– runerback
Nov 12 '18 at 9:53
@Steve Py Because query via EF is slow but directly query via script is fast for about 400,000 data in sql server with no reason, I want to found out by comparing.
– runerback
Nov 12 '18 at 9:53
What is the EF query that is slow? Have you run a profiler against it an extracted the exact SQL that EF is executing? Writing an SQL statement that you think is equivalent and finding that faster than EF can be useful for comparison, but first you need to inspect exactly what EF is generating in your situation. 99 times out of 100 it doesn't require trying to customize EF's querying, but rather something unexpected happening due to configuration or how you're consuming the entities.
– Steve Py
Nov 12 '18 at 10:24
What is the EF query that is slow? Have you run a profiler against it an extracted the exact SQL that EF is executing? Writing an SQL statement that you think is equivalent and finding that faster than EF can be useful for comparison, but first you need to inspect exactly what EF is generating in your situation. 99 times out of 100 it doesn't require trying to customize EF's querying, but rather something unexpected happening due to configuration or how you're consuming the entities.
– Steve Py
Nov 12 '18 at 10:24
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53255547%2fhow-to-query-multiple-table-from-sqlquery-method-in-entity-framework-6-0%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53255547%2fhow-to-query-multiple-table-from-sqlquery-method-in-entity-framework-6-0%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Is there a reason you cannot map entities and the relationship between these entities in Entity Framework? The code you have outlined looks like ADO.
– Steve Py
Nov 12 '18 at 5:09
@Steve Py Because query via EF is slow but directly query via script is fast for about 400,000 data in sql server with no reason, I want to found out by comparing.
– runerback
Nov 12 '18 at 9:53
What is the EF query that is slow? Have you run a profiler against it an extracted the exact SQL that EF is executing? Writing an SQL statement that you think is equivalent and finding that faster than EF can be useful for comparison, but first you need to inspect exactly what EF is generating in your situation. 99 times out of 100 it doesn't require trying to customize EF's querying, but rather something unexpected happening due to configuration or how you're consuming the entities.
– Steve Py
Nov 12 '18 at 10:24