在System.Data.dll中发生了C＃MS Access数据库连接System.Data.SqlClient.SqlException”

Question

I am not sure if this problem has anything to do with my code or simply the way that my database is set up. Any pointers would be awesome!

This is the error message that I get:

I have gone to "Modify Connection" and used the 'Test Connection' tool and that says that it connects fine but when the actual program runs nothing happens and I get the error.

Here is my code:

    private void btnAddCustomer_Click(object sender, EventArgs e)
    {
    SqlConnection CustomerInfo = new SqlConnection("Data Source=C:\\Users\\Cory\\Desktop\\DeluxWrapsWindows\\DeluxWrapsWindows\\DeluxWraps_DB.mdb");
    { 
    SqlCommand xp = new SqlCommand("Insert into CustomerInfo(LastName, FirstName, Email, PhoneNumber, Address, Instagram, CarMake, CarModel, AdditionalNotes) Values(@LastName, @Firstname, @Email, @PhoneNumber, @Address, @Instagram, @CarMake, @CarModel, @AdditionalNotes)", CustomerInfo);

     xp.Parameters.AddWithValue("@LastName", txtLastName.Text);
     xp.Parameters.AddWithValue("@FirstName", txtFirstName.Text);
     xp.Parameters.AddWithValue("@Email", txtEmail.Text);
     xp.Parameters.AddWithValue("@PhoneNumber", txtPhoneNumber.Text);
     xp.Parameters.AddWithValue("@Address", txtAddress.Text);
     xp.Parameters.AddWithValue("@Instagram", txtInstagram.Text);
     xp.Parameters.AddWithValue("@Carmake", txtCarMake.Text);
     xp.Parameters.AddWithValue("@CarModel", txtCarModel.Text);
     xp.Parameters.AddWithValue("@AdditionalNotes", txtAdditionalNotes.Text);

     CustomerInfo.Open();
     xp.ExecuteNonQuery();
     CustomerInfo.Close();

    }
}

Answer 1

You should try create the SqlCommand with:

SqlCommand xp = CustomerInfo.CreateCommand();

See this example:

https://msdn.microsoft.com/pt-br/library/system.data.sqlclient.sqlconnection.createcommand(v=vs.110).aspx

Update:

Try use OleDbConnection . See:

public DataSet GetDataSetFromAdapter(
    DataSet dataSet, string connectionString, string queryString)
{
    using (OleDbConnection connection =
               new OleDbConnection(connectionString))
    {
        OleDbDataAdapter adapter =
            new OleDbDataAdapter(queryString, connection);

        // Set the parameters.
        adapter.SelectCommand.Parameters.Add(
            "@CategoryName", OleDbType.VarChar, 80).Value = "toasters";
        adapter.SelectCommand.Parameters.Add(
            "@SerialNum", OleDbType.Integer).Value = 239;

        // Open the connection and fill the DataSet. 
        try
        {
            connection.Open();
            adapter.Fill(dataSet);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        // The connection is automatically closed when the 
        // code exits the using block.
    }
    return dataSet;
}

See more details in: https://msdn.microsoft.com/en-us/library/System.Data.OleDb.OleDbParameterCollection(v=vs.110).aspx

Answer 2

It sounds like your trying to use a local database or auto-named database: Here is the syntax for your connection string:

Data Source=(LocalDB)\v11.0;
AttachDbFilename=Your local location here;
Integrated Security=True

Hope that helps.

Answer 3

The problem is you're using System.Data.Sql as the provider, when it should all be coming from System.Data.OleDb ;

However, you can use <asp:SqlDataSource> in ASPX, to connect to an Access Database, but that is not the same thing as System.Data.Sql .