oledb

I want to populate a drop down list at runtime in C#. I have a Date/Time field (e.g., 01/05/2000) in an Access 2003 database. I want to have the month name (i.e. January, February, ...) in the drop down list at runtime. SELECT DISTINCT MonthName(Month(DATE_OF_BOOKING)) AS MNTH FROM TRAVEL_DETAILS WHERE YEAR(DATE_OF_BOOKING)='2008' The above query works fine while I'm running it from Access directly, but when I'm trying to run it from an OledbCommand object in C# it says Undefined function 'MonthName' in expression. Text from social msdn thread : Custom user-written VBA functions as well as

I know this questions is rather general, but I have searched the whole day and I haven't been able to find the proper way to do this. Here is my code to insert some 100 000 dummy records into an MDB file using C#. OleDbConnection con = new OleDbConnection(); string dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"; string dbSource = "Data Source = D:/programming/sample.mdb"; con.ConnectionString = dbProvider + dbSource; OleDbCommand cmd = new OleDbCommand(); cmd.Connection = con; cmd.CommandText = "INSERT INTO tblBooks (Title, Price, Tag, Author) VALUES (@title, @price, @tag, @author)"; cmd

Can someone help me with this error? When I try to open a connection to an mdb, I get "The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine" error. How can I correct this? My code is pretty simple: class ImportTDB { private string filename; private string connectionString; private int collisions = 0; public ImportTDB(String filename) { this.filename = filename; this.connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filename; } public void loadCustomerList() { DataTable dt = new DataTable(); using (OleDbConnection conn = new OleDbConnection

Below it the code I'm using to connect to an Access database and pull the values from the query. Problem is.. I cannot get any values back from the reader object. I can see that there are the correct amount of rows, however I keep getting an InvalidOperationException (whether I use GetValue() or GetString()) saying "No data exists for the row/column." System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(); conn.ConnectionString = @"Provider=Microsoft Office 12.0 Access Database Engine OLE DB Provider;" + @"Data source= C:\Users\nearod\Desktop\ImportDB.accdb"; try {

I'm trying to do an insert in oledb(ms access database) the field called objectdate is date/time the code i use to add the parameter is this, but i'm getting error. OleDbParameter objectdate = new OleDbParameter("@objectdate", OleDbType.DBDate); objectdate.Value = DateTime.Now; cmd.Parameters.Add(objectdate); the error: Data type mismatch in criteria expression. Wout OleDB doesn't like milliseconds in the datetime parameters. If you remove the milliseconds it will go ok. See also: How to truncate milliseconds off of a .NET DateTime . You could use. OleDbParameter objectdate = new

When I used OLEDB, it takes only 2 - 3 seconds to read 3200 rows from an Excel Sheet. I changed to the OpenXML format and now it takes more than 1 minute to read 3200 rows from an Excel Sheet. Below is my code: public static DataTable ReadExcelFileDOM(string filename) { DataTable table; using (SpreadsheetDocument myDoc = SpreadsheetDocument.Open(filename, true)) { WorkbookPart workbookPart = myDoc.WorkbookPart; Sheet worksheet = workbookPart.Workbook.Descendants<Sheet>().First(); WorksheetPart worksheetPart = (WorksheetPart)(workbookPart.GetPartById(worksheet.Id)); SheetData sheetData =

I am trying to check if a column exists and if not, add it. I've tried a couple of solutions including this , but the syntax isn't correct for Access db. This is what I have so far: public void Update(string task, string dbPath, string tableName = "Frames") { OleDbConnection db = new OleDbConnection("Provider=Microsoft.JET.OLEDB.4.0;data source=" + dbPath); db.Open(); OleDbCommand command = db.CreateCommand(); command.CommandText = "COL_LENGTH('Frames','SetNumber')"; Debug.WriteLine(command.ExecuteReader()); /* string[] restrictions = new string[] {null, null, tableName}; DataTable dtColumns =