c#: ExecuteNonQuery() returns -1

问题

Ive used this method before to return the amount of rows changed. I am it to run an insert method, the insert runs fine in the stored procedure, but the return value from the ExecuteNonQuery always returns -1.

Here is my C# code:

int ret = 0;

using (SqlConnection conn = new SqlConnection(this.ConnectionString))
{
    using (SqlCommand cmd = new SqlCommand(QueryName, conn))
    {
        conn.Open();

        if (Params != null)
            cmd.Parameters.AddRange(Params);

        cmd.CommandType = CommandType.StoredProcedure;

        ret = cmd.ExecuteNonQuery();

        conn.Close();
    }
}

return ret;

Why do I get -1 instead of the actual number of rows changed?

回答1:

If you use this method to call a store procedure that perform UPDATE/INSERT in a table the method return -1 if the stored procudere has the SET NOCOUNT at ON value.

--source

回答2:

From Microsoft:

For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. When a trigger exists on a table being inserted or updated, the return value includes the number of rows affected by both the insert or update operation and the number of rows affected by the trigger or triggers. For all other types of statements, the return value is -1. If a rollback occurs, the return value is also -1.

http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executenonquery.aspx

You are probably getting -1 because you are using a stored procedure and not a direct table change

回答3:

What value are you returning from your stored procedure? Can you show the code for your stored procedure. You probably need to edit your stored procedure to return the required value, OR, your stored procedure is returning a -1 either specifically or the variable that the stored procedure returns has -1 as its value.

回答4:

Get the row count output from the stored procedure something like using @rowCount=@@Rowcount. In the DAL, use dbManager.AddOutParameter("RowCount", DbType.Int32, rowCount); Then in the final rows you will get as (int)dbManager.GetParameterValue("RowCount").

来源：https://stackoverflow.com/questions/8125009/c-executenonquery-returns-1

标签

executenonquery