DataSource Controls :: How To Select Multiple Tables By Using LinQ In MVC
May 19, 2010I'm using ASP.NET MVC to create a small web apllication.
Here is my database And here is my class
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Similar Messages:
DataSource Controls :: Deleting Data From The Multiple SQL Tables With LINQ (C#)?
Apr 22, 2010I'm looking for ideas on deleting data from the multiple SQL tables with LINQ (C#).
My existing solution does the following:
1. DeleteAllOnSubmit( Subset of the data from the child table)
2. DeleteAllOnSubmit( Subset of the data from another child table)
3. DeleteAllOnSubmit( Data from the parent table)
4. CommitChanges()
All this resides within a single method, which makes it ugly and not re-usable.
I have considered the following alternatives, but I decided not to use them:
1. Cascade delete on the tables.
2. Do a join on all tables from which I will remove the data, but I'm not sure yet whether I could pass a join query to DeleteAllOnSubmit().
3. Write stored procedure(s) to delete data from each table. I don't have the time to implement this due to a large number of tables and the time constraints.
DataSource Controls :: How To Get Data From Two Tables In Linq
Apr 28, 2010How to get data from two tables through linq .1 ) productsDetails 2) productsImages to bind further listview.
View 1 RepliesDataSource Controls :: Select Statement Across Three Tables?
Mar 17, 2010[Code]....
Select statement across three tables
DataSource Controls :: LINQ And C# - Accessing More Then 2 Tables In A Query
Apr 23, 2010As the title sugests, I am missing a (basic?) concept as I teach myself asp.net, linq, and C#. It has been awhile since I've done anything object oriented, so I don't know how much that is impacting this gap in my understanding. Anyhow, here is what I am trying to do. I have three SQL Server tables: PERSON, POSITION, AREA. There is a 1 to many relationship between PERSON and POSITION, and a 1 to 1 relationship between POSITION and AREA. Given the following code I verify who the person is who has logged into the browser:
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I want to be able to return all of the AREAs the person is able to access, based on the position they currently hold. I am able to easily do this in a SQL Server query, and I am sure I can do this with a SQL stored procedure once I pass the EMPLOYEE_ID to the procedure. However, I would rather do this in the page_load event, and load the returned results into gridview1 for the viewer. The issue I am running into is in building the LINQ query. When I try to build it, I can only get access to two of the three tables, depending on which table I select with db. Is it possible to access all three tables in the same query?
DataSource Controls :: Can Get Two Tables In Only One Query With LINQ To Entities
May 20, 2010can get two tables in only one query with LINQ to Entities
Code for example:
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DataSource Controls :: Count From Several Tables In One Select Statement
Mar 14, 2010I am trying to count records belonging to a certain person in three different tables in a single select statement. The database looks like this:
Player
-PlayerId
-Name
Game
-GameId
-TournamentId
...
Goal
-GameId (FK->Game.GameId)
-PlayerId (FK->Player.PlayerId)
-Assist (FK->Player.PlayerId)
Card
-CardId
-GameId (FK->Game.GameId)
-PlayerId(FK->Player.PlayerId)
I want to select the number of goals, assist and cards a player has in a specific tournament. I tried with this query but then the goal and card column shows the sum of the number of rows matching the playerid in the Goal table and the Card table...For example if there is two matching rows in the goal table and three matching rows in the card table, I get 5 in both these columns in the resultset.
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DataSource Controls :: How To Join Two Tables And Get Uncommon Records Using LINQ
Jan 22, 2010I have two tables namely "CategoryMapping" and "PartnerCategory"...The partnercategory table has foreign key with categorymapping on CategoryID...
let us say categorymapping should be filed first then partnercategory should be filed based on the categories defined in categorymapping. For example my two tables have the following data:
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DataSource Controls :: Select Parts Of Large Tables Optimized?
May 4, 2010If I have a huge Order-table and I want to display records from it using paging, what is the best way to select the records from the database?
If I first do like this:
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..and then select the records I want based on RowNum it seems like I select ALL records in the first query anyway. I guess I want to do something like SELECT TOP @PageSize FROM Orders...
DataSource Controls :: SQL Server SELECT Statement Is Slow In Large Tables?
Jun 1, 2010I'm facing a problem in our current running application. There is a table in database which has 67 columns,among these 18 columns are nvarchar(max) datatype and contains 30K records. Problem is now that SELECT * FROM myTable it takes around 3 to 4 seconds. Which is degrading our application's performance.
View 12 RepliesDataSource Controls :: 2 Tables - Join And Order By / Select All Entries In GalleryAlbums Table?
Apr 6, 2010I have two tables:
GalleryAlbums and GalleryPhotos.
I would like to Select all entries in the GalleryAlbums table, but Order them (DESC) by date values in a column (upload_date) on the GalleryPhotos table. Both tables have a column "album_id"
A little confused how I might write this statement.
DataSource Controls :: How To Select Only Certain Columns With LINQ
May 11, 2010If I have a linq statement like:
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There may be a lot of data in the Blogs table. What if all I wanted was say BlogID, BlogTitle and BlogAuthor and nothing else, is there a way to do this in an effort to make the sql more efficent?
Along the same lines in my DataContext (.dbml) file I added some associations between some of my tables. This makes coding nice when I do a linq statement that will join those tables automatically for me but my concern is does it do that everytime, thus making all my linq quieries inefficient?
ADO.NET :: Linq On Multiple Tables With Same Columns
Aug 17, 2010I have a partitioned db where several tables have the exact same structure. I'm able to query the tables using linq, but only by quering the individual tables 1 at a time and by using the explicit table name. For example at the moment, I have 8 tables so I have something similar to the following:
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Is there any way, that based on a certain value (stringValue), I could determine which table to query and then code the linq query just once?
ADO.NET :: Searching Through Multiple Tables (Linq To SQL)?
Aug 12, 2010I have a couple tables that are kind of unrelated - id like to search through both of them and create a type that i can sift through later
something like this doesnt work
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I basically want to create a list of "AnimalSearchResults" that contains all dogs and all cats that have that name Whats the best way to do something like this?
C# - Linq - Group By Multiple Tables?
Aug 8, 2010Using Linq to Sql how do i group the following 2 tables.
Orders Table:
CustomerID | Name |Date
1 | order1 | 2010-01-01
2 | order2 | 2010-01-01
2 | order3 | 2010-04-01
Calls Table:
CustomerID | Name |Date
1 | call1 | 2010-01-01
3 | call2 | 2010-06-01
2 | call3 | 2010-05-01
I want to group the two tables by date , Result:
Date | Orders | Calls
2010-01-01 | 2 | 1
2010-04-01 | 1 | 0
2010-05-01 | 0 | 1
2010-06-01 | 0 | 1
i know how to group a single table ,from o in Orders group o by o.Date.Date into og select new {Date = og.Key,Orders= og.Count()};
DataSource Controls :: Sproc Insert Into Multiple Tables
Jan 11, 2010I have a sproc that will insert a new record into Table1. Next I need to Insert into another table the scope_identity of the inserted record. How do I incorporate the scope_identity value as the insert parameter in the second insert statement?
View 3 RepliesDataSource Controls :: Retrieving Data From Multiple Tables?
Aug 17, 2010I have hard time trying to find the solution to retrieve data from multiple tables in one database.
table Kategorije has fields: idKategorija, naziv, opis table Clanak has fields: idClanak, idKategorija, naslov, autor,...
Kategorije.idKategorijais joined with Clanak.idKategorija, but that isn't the solution because I want my web site to show the Kategorije.naziv instead of Kategorije.idKategorija. This is the code I'm currently using to get idKategorije shown on my web site:
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DataSource Controls :: Insert Statement For Multiple Tables?
Jul 12, 2010I've got 3 tables.
Table A: UID, Name
Table B: CID, Category
Table C: ID, UID, CID
I've got a TextBox to capture the value of "Name" in Table A.
Ive got a CheckBoxList that displays all the pre-determined values of Table B.
When the user selects an item from the CheckBoxList i want to populate Table C with the value of the selected item from the CheckBoxList and the cooresponding ID associated with the user name for that person's entry.
How do I write the INSERT statement?
DataSource Controls :: Drop Multiple Tables Through An SQL Statement?
Apr 27, 2010How can i Drop Multiple table through an SQL Statement rather than using a procedure or a function.
View 7 RepliesDataSource Controls :: Creating A Dataset With Multiple Tables
Jan 29, 2010I have a dataset with 3 tables that are inner joined. Thsi dataset is connected to an object datasource which is connected to a gridview. So at runtime it displays data from the database. The problem is when I click on a save button to add information to the database it throughs me an error saying Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints. But if i have two tables in my dataset it works 100%. But the problem i need that 3 tables in order to pull the required information. And if i populate the gridview using code to select the information from the database and insert information it also works 100%.
View 3 RepliesDataSource Controls :: Returning Multiple Tables Into A DataSet
Apr 10, 2010How to return multiple tables to dataset. My code is
string q = "select job_title,primary_skill,description from T12_Company_AddRequirement where job_code='JB1';select count(p_status) from T12_SentDetails where job_code='JB1'and p_status='Technical 1';select count(p_status) from T12_SentDetails where job_code='JB1'and
p_status='Technical 2';select count(p_status) from T12_SentDetails where job_code='JB1'and p_status='Technical 3';select count(p_status) from T12_SentDetails where job_code='JB1'and p_status='HR'";
SqlConnection con=new SqlConnection(s);
SqlDataAdapter da = new SqlDataAdapter(q, con);
DataSet ds = new DataSet();
da.Fill(ds);
Grid_description.DataSource = ds.Tables[0];
Grid_description.DataSource = ds.Tables[1];
Grid_description.DataSource = ds.Tables[2];
Grid_description.DataSource = ds.Tables[3];
Grid_description.DataSource = ds.Tables[4];
Grid_description.DataBind();
This code is returning error.
DataSource Controls :: Adding Multiple Tables To The Array?
Feb 4, 2010I am using ASP.NET 2.0, C# and Sql Server 2005.I have 2 tables retruned by the stored procedure to the application. I am returning an Array from my datalayer to my bussiness layer and then to my UI layer.I have added the first table into the array and passing it to the UI layer. This is my current code:
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How to pass the second table details to the same array, NameArrayKeyEntity .
DataSource Controls :: Write Data To Multiple (two) Tables?
May 6, 2010I have to write data to multiple (two) tables.
tbl1 has a column "ORDERID" with auto increment. I have to get this "ORDERID" whenever I write to tbl1 (Insert new record)
tbl2 has a coumn "ORDERID" as foreign key, I have to write "ORDERID" in tbl2 received from the tbl1.
How to do it using SQL ( I am not using StoredProcedure)
DataSource Controls :: How To Select Data With Linq And Bind To A DDL
Jan 5, 2010I am trying to select data with Linq and bind to a DDL. The custid field allows duplicates in this table, but I only want unique values in the ddl. I tried the following code:
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The use of "Select Customer.CustID", with or without the Distinct, causes this runtime error. CustID is a valid field in the table, and it shows up in intellinsense and compiles. If I just Select Customer, the error goes away, but Distinct doesn't know to look for distinct custid's.
DataBinding: 'System.String' does not contain a property with the name 'CustID'.
ADO.NET :: Linq Examples With Multiple Tables - Using PK And FK In A Dataset?
Aug 19, 2010Does anyone have some really great tutorials on how to use link with datasets that contain multiple tables that utilise primary key and foreign key relations? For eample
Table1
- id (PK)
- language
Table2
-id (PK)
-programmingword
Table3
-id (PK)
-languages_ID (FK)
-pgrammingword_ID (FK)
-translatedword
Linq search for: Table3.translatedword where Table1.Language ='french' and Table2.programmingword = "yes" does this make sense? im looking for exampes/ tutorials for how to do this? or can anyone recommend any good books on linq?