Passing a boolean type into a bit parameter type in C# and MS SQL Server

Question

I have a C# method that accepts a clientId (int) and hasPaid (boolean) that represents if the client has paid or not. The MS SQL Server stored procedure expects a BIT value (1 or 0) for the @HasPaid parameter yet the method expects a boolean type (true/false) for hasPaid. Will the ADO.NET code take care of converting the boolean to a bit type for SQL Server or do I need to convert the value of hasPaid into a 1 or 0?

public void UpdateClient(int clientId, bool hasPaid)
{
    using (SqlConnection conn = new SqlConnection(this.myConnectionString))
    {
        using (SqlCommand sqlCommand = new SqlCommand("uspUpdatePaymentStatus", conn))
        {
            sqlCommand.CommandType = CommandType.StoredProcedure;
            sqlCommand.Parameters.AddWithValue("@ClientID", clientId);
            sqlCommand.Parameters.AddWithValue("@HasPaid", hasPaid);
            sqlCommand.Connection.Open();
            var rowsAffected = sqlCommand.ExecuteNonQuery();
        }
    }
}

It should but be careful with the AddWithValue as it can exhibit some weird behavior, you're better off declaring the types explicitly — bumble_bee_tuna
– bumble_bee_tuna, Commented Jun 25, 2015 at 15:57
.NET will take care of this for you. SQL Server will implicitly convert most junk that resembles a Boolean type to bit, so this will be no exception. — Alec.
– Alec., Commented Jun 25, 2015 at 15:58
@Dustin - I have tried it and it seems to work but I was wondering if this is the best way to do it or should I pass in 1 or 0 — webworm
– webworm, Commented Jun 25, 2015 at 15:59
Here is an article discussing the issues with AddWithValue as @bumble_bee_tuna was mentioning. blogs.msmvps.com/jcoehoorn/blog/2014/05/12/… — Sean Lange
– Sean Lange, Commented Jun 25, 2015 at 16:23

Scott Chamberlain · Accepted Answer · 2015-06-25 17:01:47Z

12

When working with SQL parameters I find AddWithValue's auto detection feature of the type too unreliable. I find it better to just call Add a explicitly set the type, Add also returns the new parameter it creates from the function call so you can just call .Value on it afterward.

public void UpdateClient(int clientId, bool hasPaid)
{
    using (SqlConnection conn = new SqlConnection(this.myConnectionString))
    {
        using (SqlCommand sqlCommand = new SqlCommand("uspUpdatePaymentStatus", conn))
        {
            sqlCommand.CommandType = CommandType.StoredProcedure;
            sqlCommand.Parameters.Add("@ClientID", SqlDbType.Int).Value = clientId;
            sqlCommand.Parameters.Add("@HasPaid", SqlDbType.Bit).Value = hasPaid;
            sqlCommand.Connection.Open();
            var rowsAffected = sqlCommand.ExecuteNonQuery();
        }
    }
}

Using the correct type is doubly important when using stored procedures and it is expecting a specific type, I just got in to the habit of always doing it this way.

answered Jun 25, 2015 at 17:01

Scott Chamberlain

128k37 gold badges299 silver badges447 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Mike W Over a year ago

but shouldn't a Bit Parameter accept 0 or 1? It only accepts Boolean.

Scott Chamberlain Over a year ago

@MikeW it only shows up as 0 or 1 in Sql Management Studio because that's how they wanted to display it. It actually is a Boolean value.

Mike W Over a year ago

a Bit is 0 or 1 but if you do: sqlCommand.Parameters.Add("@HasPaid", SqlDbType.Bit).Value = 1; you wil get an error when you Execute.

Abdulrehman · Accepted Answer · 2022-07-21 10:06:53Z

0

Just Convert Bool to int before sending in EF Queury Convert.ToInt16(boolValue);

answered Jul 21, 2022 at 10:06

Abdulrehman

591 silver badge3 bronze badges

Collectives™ on Stack Overflow

Passing a boolean type into a bit parameter type in C# and MS SQL Server

2 Answers 2

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related