Question

I created a *.sdf file with password protected using Visual Studio, worked fine. I insert some data and I tried read using Visual Studio SQL editor, but when I went to the C # code that did not work.

I tried the following:

using System;
using System.Data.SqlServerCe;


    class Program
    {
        static void Main(string[] args)
        {
            var conStr = @"data source=C:\path\db.sdf; password=<...>";
            SqlCeConnection con = new SqlCeConnection(conStr);
            con.Open();

            SqlCeCommand cmd = con.CreateCommand();
            cmd.CommandText = "select * from Cookies";
            cmd.CommandType = System.Data.CommandType.TableDirect;
            cmd.Connection = con;

            SqlCeDataReader result = cmd.ExecuteReader();
            //...
            con.Close();
        }
    }

I getting the following error:
The specified table does not exist. [ select * from Cookies ]

The table structure

This returns false. Someone can point my mistake?

Thanks in advance.

Answer 1

Your problem is that you’re specifying System.Data.CommandType.TableDirect.

When you change your code to use the following, you’ll avoid the error you’re seeing.

cmd.CommandType = System.Data.CommandType.Text;

You can even exclude setting the CommandType property, as Text is the default.

TableDirect is an OLEDB legacy command type. Don’t use it unless your command is only a table or view name. Internally, the command object will construct a SELECT * FROM statement, selecting all fields and all records from the specified table or view.