oledb

I'm using Microsoft Access unfortunately because of higher forces and trying to update a record with no luck. This is the code: private void UpdateContact(Contact contact) { using (OleDbConnection db = new OleDbConnection(_connString)) { string query = "UPDATE [Contact] SET [FirstName] = @FirstName, [LastName] = @LastName, [MobileNumber] = @MobileNumber WHERE [Id] = @Id"; OleDbCommand cmd = new OleDbCommand(query, db) { CommandType = CommandType.Text }; cmd.Parameters.AddWithValue("@Id", contact.Id); cmd.Parameters.AddWithValue("@FirstName", contact.FirstName); cmd.Parameters.AddWithValue("

I use OleDB to read an Excel file. One of the columns has a "Common" format and contains both strings with letters and values consisting of numbers only. String values are retrieved without problem, but pure numerical values are retrieved as DBNull . How to solve? I use the following connection string to open Excel 2003 file (xls): "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\\file.xls; Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"" I found some documentation on Microsoft's website that applies to your scenario. They recommend converting all the numerics to strings. http://support

I am running following code /*Fetchinch Last CustID from custMaster*/ int ID = 0; try { con.Open(); da = new OleDbDataAdapter("select max(Id) from custMaster",con); DataSet ds = new DataSet(); da.Fill(ds); for(int i=0;i<ds.Tables[0].Rows.Count;i++) ID=int.Parse(ds.Tables[0].Rows[i][0].ToString()); con.Close(); } catch (Exception ex) {} finally { con.Close(); } I am putting debugger from the first statement of try block and finding that error is coming when I am trying to open the connection. Error Text: Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if

How can I make sure that a certain OLEDB driver is installed when I start my application? I use ADO from Delphi and would like to display a descriptive error message if the driver is missing. The error that's returned from ADO isn't always that user-friendly. There are probably a nice little function that returns all installed drivers but I haven't found it. Jeremy Mullin Each provider has a GUID associated with its class. To find the guid, open regedit and search the registry for the provider name. For example, search for "Microsoft Jet 4.0 OLE DB Provider". When you find it, copy the key

I have scoured the net, and found many people asking this, yet none have fixed my answer. I have a Connection Class, and a Method that uses that Class in a page. DataConn.cs public static OleDbConnection ConnectExcel() { //Store the connection details as a string string connstr = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=pricelist.xlsx;Extended Properties=Excel 12.0 Xml;HDR=YES"); //Initialise the connection to the server using the connection string. OleDbConnection oledbConn = new OleDbConnection(connstr); //Open the connection, we do this here so we can instantly be able

I read/update data from MS Access using C#. My code is: public static void UpdateLastLogin(int userid, DateTime logintime) ///logintime = DateTime.Now { string sql = @"UPDATE [Customers] SET [LastLogin]=?"; OleDbParameter[] prms = new OleDbParameter[] { new OleDbParameter("@LastLogin",logintime) }; using (DAL dal = new DAL()) { dal.UpdateRow(sql, false, prms); } } When it comes to Dates, I having trouble. This throws a "Data type mismatch in criteria expression." error. (I removed WHERE clause for keeping it simpler) Am I suuposed to enclose [LastLogin]=? question mark with single quotes, #

I use the following from within some excel procedures to establish a connection to our database. Private Const strConn As String = _ "PROVIDER=SQLOLEDB.1 ..." Sub OpenConnection() Set cn = CreateObject("ADODB.Connection") cn.Open strConn cn.CommandTimeout = 0 Set rs = CreateObject("ADODB.Recordset") Set rs.ActiveConnection = cn End Sub In subsequent code I open the connection using various SQL strings. I'd like to test if rs is open so I know that it needs to be closed but the following does not work. How can I change the condition in the following to work? If (rs.Open = True) Then rs.Close

I'm using this code to open an excel file and save it in a DataGridView: string name = "Items"; string constr = "Provider = Microsoft.Jet.OLEDB.4.0; Data Source=" + Dialog_Excel.FileName.ToString() + "; Extented Properties =\"Excel 8.0; HDR=Yes;\";"; OleDbConnection con = new OleDbConnection(constr); OleDbDataAdapter sda = new OleDbDataAdapter("Select * From [" + name + "$]", con); DataTable data = new DataTable(); sda.Fill(data); grid_items.DataSource = data; As explained on: This youtube link But I get an ISAM error. Any suggestion? Since you have not replied to my comment above, I am