how to call tvp from ExecuteFuntion.
hi , is it the right wayDataTable ActivityRoutineParameter = new DataTable(); ActivityRoutineParameter.Columns.Add("p1", typeof(long)); ActivityRoutineParameter.Columns.Add("p2", typeof(long));...
View ArticleI want to call TVF from entityframwork
hi,the code given in msdn uses ado.net that is sqlcommand. i want to call a sp having tvf using context of entitiyframworkin entityframwork also there are manyways like entityfunction , sqlquery...
View ArticleLambda Expression Breaks if Values are Null
I have a nullable field in a database that is populated if users enter an optional value. In this case it is for keywords which used to be required whenever a user created a post, but to make things...
View ArticleDatabase values reverted to their defaults when updating the database
Ecommerce web site, written using ASP.NET Core 3.1, Razor pages, EF 3.1.8 code first.I have a model called Global. When I first set this up, I included the default values for four properties (others...
View ArticleGenerating dynamic HTML tables using StoredProcedures
I'm working on a reporting feature that outputs to HTML tables in Razor pages. The reports have a lot of similar fields (i.e. FirstName) and I'd like to apply the DRY Principal as much as possible...
View ArticleCan we use "dotnet ef database update" on published version?
I have created a web application using ASP.Net Core 3.1, entity frame work core, code-first, on VS-2019. I used the following code in my windows 10 shell (CMD) to make it published and ready to be...
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Nhibernate linq null reference
The below statement is throwing null reference exception, as some of the values EducationalResourceForProblemID are null.How do we check to make sure we execute the statement only when it is not...
View ArticleEF Core - .Include()
Trying to get my head around EF Core.I have an existing db and used this to generate the EfModel. I can get the list of Transactions to display in a Blazor Server app.There is a Transactions table and...
View ArticleASP.NET and Oracle Database 11g
Hi,I am using oracle database 11g as back end and vb.net using as front end in my web based application framework version 4.0.I have created a function in Oracle which used to return a RefCursor and I...
View ArticleNET5 Swagger WebAPI reveals problem "unable to determine the relationship...
My first baby steps with Swagger against a mature SQL Express database reveals the issue below.Not sure if this is a EFCore issue or a Swagger issue.When I was scaffolding this db there were no error...
View ArticleEF Core - select MAX with subquery
Hello,I'm trying to "translate" in EF core this SQL query:SELECT * FROM Estrazioni WHERE Estrazioni.DataEstrazione = (SELECT MAX(maxEstrazione.DataEstrazione) FROM Estrazioni AS maxEstrazione)I have...
View ArticleCreate database context from cookie and base path
Postgres database has multiple schemes like company1, company2, ... companyNBrowser sends cookie containing scheme name . Data access operations should occur in this scheme. Web application user can...
View ArticleEF Core - conditionally use .Include
Hi,I need conditionally use .Include,tried something like that: var res = db.HT_REZ.AsQueryable(); if (condition) { res = res.Include(r => r.CF)...
View ArticleUsing columns not defined in model with Entity Framework Core in ASP.NET Core 5
ASP .NET Core MVC 5 application runs in different Postgres databases.Table names are same in all databases. Base column names and types are same in all databases.Tables can also contain additional...
View Articlegetting a single value from entity framework core stored procedure
Hello All,I am trying to call a stored procedure using entity framework core. The stored procedure is little bit complicated so I am not using LINQ. Below is my code: using(IdentityProofContext dc =...
View ArticleUpdating the existing row in a table with session data
Hello All,I have an entire class object stored in my session. I want to update an existing row in a table with the session data. I am trying to find out if their any better way. In below code, I am...
View ArticleCan't configure EntityDataSource under Entity framework version 6
Hi, I have been searching for the answer for this problem more than 2 weeks, I hope anyone could help.I have just start a new project and I did install the Entity framework v6.4.4 to my project. I also...
View ArticleTrim trailing spaces from retrieved strings in EF Core
ASP.NET MVC Core 5 application uses Npgsql Entity Framework Core Data Provider to get data from Postgres database using Entity Framework Core. Columns in database are defined as CHAR(n) type, like...
View ArticleOutput parameter from SP inside async method
Hi,I want to return output parameter for total number of records from stored procedure and call this SP through EF core inside an async method but I am facing issue with out parameter in async method...
View ArticleEF Core model customization needed - Microsoft.Data.SqlClient.SqlException...
I have a Client table with 5 foreign keys: OwnerLocation, OwnerBillTo, EnteredByProvider, sId, gId, bIdSqlServer finds a problem as per the title for bId, and I assume will do the same for sId and...
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