如何使用Entity Framework执行插入查询

Question

I am trying to execute a insert query using Entity Framework.

I have something like this:

Context.database.ExecuteSqlCommand("Insert into tableName Values({0},{1},{2}", param1, param2, param3)

but this is throwing an error

incorrect syntax near '@p1'

What is this '@p1' ?

Answer 1

You missing the closing ) at the end of your INSERT.

It should be:

Context.database.ExecuteSqlCommand("Insert into tableName Values({0},{1},{2})", param1, param2, param3)

Alternatively, you could use the SqlParameter class:

Context.Database.ExecuteSqlCommand(
    "Insert into tableName Values(@id, @firstName, @lastName)",
    new SqlParameter("id", id),
    new SqlParameter("firstName", firstName),
    new SqlParameter("lastName", lastName)
);

Answer 2

Apart from the obvious question why you are writing SQL, it seems you are missing a closing parenthesis, after the third {2} parameter:

Contex.database.ExecuteSQLCOmmand(@"Insert into tableName Values({0},{1},{2})",param1,param2,param3);

Then it is also a good practise to specify column names, like so:

Contex.database.ExecuteSQLCOmmand(@"Insert into tableName (col1, col2, col3) Values({0},{1},{2})",param1,param2,param3);