Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.3k views
in Technique[技术] by (71.8m points)

sql - What is the correct syntax for using Database.ExecuteSqlCommand with parameters?

I use Entity Framework 4.2 and want to call a stored procedure that has input parameters. I'm using Database.ExecuteSqlCommand to call the stored procedure.

However, the documentation is lacking in the correct syntax for the call in order to map the parameters correctly. My google-foo is failing me, and any help will be appreciated.

I.e. I have a procedure

procedure SetElementFrequency
  @ElementTypeID integer,
  @Frequency float
as ...

I've tried calling it with

Database.ExecuteSqlCommand("exec SetElementFrequency @p0 @p1", 
                            elementType, frequency);

and

Database.ExecuteSqlCommand("exec SetElementFrequency {0} {1}", 
                            elementType, frequency);

but they both fail with the error Incorrect syntax near '@p1'.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Depending on your underlying database provider, you can use either of the following.

Database.ExecuteSqlCommand(
    "exec SetElementFrequency {0}, {1}",
    elementType, frequency); 

or

Database.ExecuteSqlCommand("exec SetElementFrequency ?, ?", elementType, frequency); 

You may also specify elementType and frequency as DbParameter-based objects to provide your own names via the ParameterName property.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...