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Entity Framework 6 with SQLite 3 Code First - Won't create tables
(2 answers)
Closed 8 years ago.
I'm trying to run sqlite in memory to run my integration tests against the database.
But I keep getting error message mentioning the tables are not created by code first.
I did not find any clue mentioning sqlite ef6 nuget package can or can not do this.
If not, what would be other options you recommend for in memory databases.
I would be thankful if you help.
Check the answer at : Entity Framework 6 with SQLite 3 Code First - Won't create tables
Btw, there is a nuget package available for SQLite : Here
To Install package :
Install-Package System.Data.SQLite.EF6
Related
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`PowerShell.Create()` returning null
(3 answers)
Closed last year.
I migrated from .NET Framework 4.8 to .NET 6.
System.Management.Automation.PowerShell.Create();
now returns null.
Is there a new package i need to reference or other solution?
Removing the old References and adding the NuGet package
Microsoft.PowerShell.SDK solved this issue.
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How to Bulk Update records in Entity Framework?
(9 answers)
Closed 2 years ago.
In my ASP.NET application I am using Entity Framework 6 with SQL Server. As per my scenario I need to perform a bulk update (40k row at a time) and bulk delete operation (40k row at a time) with EF6. EF6's RemoveRange method seems very very slow and update takes forever. Is there any way to speed this up?
you should try a stored procedure to delete the items, stored procedures are much faster and pre-compiled form stored in SQL Server.
for reference to work with Stored Procedure please visit the link.
Stored Procedure with Entity Framework
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Can code-first Entity Framework do cross database queries with SQL Server DBs on the same box?
(4 answers)
Closed 8 years ago.
I am using entity framework 6.1 and I have two databases.
CustomerDB
CustomerArchiveDB
Both have a Customer table with columns Name, Address, Year etc.
I want to get all the customers from both databases using Entity Framework.
How do I do this?
Create 2 EF models, one for each database. Materialize the objects with ToList or ToArray from each DbContext and then Concat them together in memory.
This question already has answers here:
Fastest Way of Inserting in Entity Framework
(32 answers)
Closed 6 years ago.
We have a requirement to read a load of xml files, run validation on them, transform them into entities and stores them in the database. This was being done using a repository wrapping Entity Framework.
What we have found is that Entity Framework slows the process down to the point where it doesn't process the records quickly enough. We profiled the application and the worst performing method was the SaveChanges on the EF context.
We are thinking of introducing threading as a possible solution.
Has anyone any other ideas of how we can speed up the process?
I had this problem for csv files one time. The problem was that I tried to save all my records with only one SaveChanges() because transaction was required.
I divided it (1 for 1000 records) and it resolves my performance problem.
Also, you can try to disable auto detect changes during your threatment.
I hope it helps :)
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
How to update Linq to SQL dbml file?
Is there a quick command in VS2008 to update a DBML that I'm missing or do I have to dleete everything, re-add and then deal with renames and table mods manually? This seems a bit tedious.
DBML so LINQ to SQL; you can delete and re-add a table as one option; that's what we do in our app... curious if there is a better way, but this works quick so that's what we do. THe drop down in the properties window is a quick selector for the table, and we delete, and then bring in the changed table, and it recreates the fields/relationships.
THere isn't an update model from DB like in ADO.NET entity framework.