Cannot insert to SQL Server CE with autoincrement

Question

I am unable to insert new row to a SQL Server CE 3.5 table due to an auto-increment column

My schema is as simple as:

@"CREATE TABLE DataTable ("Foo_ID int PRIMARY KEY IDENTITY, " +
                          "FooName NVARCHAR(200) NOT NULL)

And my insert statement in C#

SqlCeCommand cmd = new SqlCeCommand(@"INSERT INTO DataTable VALUES(@Foo_ID, @FooName)", con))
conn.Open();
cmd.Parameters.Add(new SqlCeParameter("FooName", "test123"));
cmd.ExecuteNonQuery();

Then I get the error:

System.IndexOutOfRangeException: An SqlCeParameter with ParameterName 'Foo_ID' is not contained by this SqlCeParameterCollection

Answer 1

Since your column FOO_ID is an auto-increment IDENTITY column, you must omit it from your INSERT statement. As such, you need to explicitly specify the list of columns you want to insert values into - try this:

SqlCeCommand cmd = new SqlCeCommand(@"INSERT INTO DataTable(FooName) VALUES(@FooName)", con))
conn.Open();
cmd.Parameters.Add(new SqlCeParameter("FooName", "test123"));
cmd.ExecuteNonQuery();

Answer 2

问题是你的参数中有@Foo_ID作为查询，但不要在cmd.Parameters.Add添加这样的参数。

Answer 3

尝试发送-1作为ID，这样会强制自动增量设置正确的值。