How to call a stored procedure in EF Core 3.0 via FromSqlRaw

Question

I recently migrated from EF Core 2.2 to EF Core 3.0.

Unfortunately, I haven\'t found a way to call a stored procedure that returns an entity.

In EF Core 2.

Answer 1

Solution (thanks to David Browne, you should have posted it as an answer):

Replacing Single with ToList works :-)

var createdPath = ModelContext.Paths.FromSqlRaw("AddNodeWithPathProc  {0}, {1}", nodeTitle, parentPathString).ToList();

Answer 2

It is extremely strange… just before a few days ago I have the same problem and follow this post. I had this call:

 public IEnumerable<TableChange> GetTableLastChanges(string tableName, string keyColumn, out int synchronizationVersion)
    {
        var parameters = new[] {
            new SqlParameter("@table_name", SqlDbType.VarChar) { Direction = ParameterDirection.Input, Value = tableName },
            new SqlParameter("@key_column", SqlDbType.VarChar) { Direction = ParameterDirection.Input, Value = keyColumn },
            new SqlParameter("@synchronization_version", SqlDbType.BigInt) { Direction = ParameterDirection.InputOutput, Value = 0 }
        };

        var changes = this.TableChanges.FromSqlRaw("[dbo].[GetTableLastChanges] @table_name, @key_column, @synchronization_version OUTPUT", parameters).ToList();

        synchronizationVersion = Convert.ToInt32(parameters[2].Value);

        return changes;
    }

Right now everything is fine and this call works as expected. Therefore I should admit that there is no problem with datasets and params return for EF on Core 3.

Answer 3

I am not where I can test but I think the following will work:

var createdPath = ModelContext.Paths.FromSqlRaw("AddNodeWithPathProc {0}, {1}", parm1 parm2).Single();

Answer 4

try to seperate SqlParameter:

SqlParameter param1 = new SqlParameter("@p0","value");
SqlParameter param2 = new SqlParameter("@p1","value");

var createdPath = ModelContext.Paths.FromSqlRaw("AddNodeWithPathProc @p0 @p1", param1, 
param2).Single();

Answer 5

var result=context.yourmodelclass.FromSqlInterpolated($"StoredProcedureName {param1},{param2}").tolist();

You can add multiple parameters if needed. Note:

• context => your name of database.
• yourmodelclass => the class in models folder you create for fetching the output result from the stored procedure result.

Answer 6

Have a look here:

https://github.com/DarioN1/SPToCore

This is a scaffolder for stored procedure, it can help you to work with sp.

Its not a third part library, it generated pure c# code to include in your project that extends current dbContext to provide stored procedure methods, parameters mapping and results classed.