oledb

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=localhost;Extended Properties=""Excel 8.0;HDR=Yes;IMEX=2" What is the purpose of IMEX=2 in the above connection string? Steve From ConnectionStrings "If you want to read the column headers into the result set (using HDR=NO even though there is a header) and the column data is numeric, use IMEX=1 to avoid crash. To always use IMEX=1 is a safer way to retrieve data for mixed data columns. .." Please note that the IMEX value can be very important when you need to write back data to the Excel. A fast search on Internet on IMEX found numerous articles

I have an SQL statement that I'm executing through OleDb, the statement is something like this: INSERT INTO mytable (name, dept) VALUES (@name, @dept); I'm adding parameters to the OleDbCommand like this: OleDbCommand Command = new OleDbCommand(); Command.Connection = Connection; OleDbParameter Parameter1 = new OleDbParameter(); Parameter1.OleDbType = OleDbType.VarChar; Parameter1.ParamterName = "@name"; Parameter1.Value = "Bob"; OleDbParameter Parameter2 = new OleDbParameter(); Parameter2.OleDbType = OleDbType.VarChar; Parameter2.ParamterName = "@dept"; Parameter2.Value = "ADept"; Command

public void LoadDB() { string FileName = @"c:\asdf.accdb"; string query = "SELECT ID, Field1 FROM Table1 WHERE ID=? AND Field1=?"; string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName; OleDbConnection odc = new OleDbConnection(strConn); dAdapter = new OleDbDataAdapter(); OleDbCommand cmd = new OleDbCommand(query,odc); cmd.Parameters.Add("?", OleDbType.Integer, 5).Value = 1234; cmd.Parameters.Add("?", OleDbType.BSTR, 5).Value ="asdf"; dAdapter.SelectCommand = cmd; ds = new DataSet(); dAdapter.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; } I'm trying to use

If I try to write a datetime to a record in an MS-Access database the easy way, like this cmd.CommandText = "INSERT INTO [table] ([date]) VALUES (?)"; cmd.Parameters.AddWithValue("?", DateTime.Now); I get an exception saying "Data type mismatch in criteria expression." Can anybody tell me why? What goes wrong here? After a little experimentation, I found that I can make it work if I write OleDbParameter parm = new OleDbParameter("?", OleDbType.Date); parm.Value = DateTime.Now; cmd.Parameters.Add(parm); but doing it like this seems less neat, less straightforward. Why is this necessary? Am I