oledb

This is my code for btnUpdate so that msAccess will update. private void btnUpdate_Click(object sender, EventArgs e) { string CoString=(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=H:\AccessDatabase.accdb"); OleDbConnection con = new OleDbConnection(CoString); string Update ="Select * from StudentDb"; DataSet ds = new DataSet(); DataSet changes; OleDbCommandBuilder cbuild = new OleDbCommandBuilder(); try { con.Open(); OleDbDataAdapter da = new OleDbDataAdapter(Update, con); da.Fill(ds); cbuild = new OleDbCommandBuilder(da); changes = ds.GetChanges(); if (changes != null) { da.Update(ds

i get this error :Query input must contain at least one table or query my code is: using (OleDbConnection myCon = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=timetabledata.accdb")){ OleDbCommand cmd = new OleDbCommand(); cmd.CommandType = CommandType.Text; string q = "INSERT INTO timehourly (teacherid,subjectid) Values ('@teacherID','@subjid')" + " WHERE hour='@i' AND dayid='@ds'"; cmd.Parameters.AddWithValue("@teacherID", Convert.ToInt32(teacher_combo.SelectedValue).ToString()); cmd.Parameters.AddWithValue("@subjid", Convert.ToInt32(subject_combo.SelectedValue)

I can't seem to figure out why I keep getting a Syntax error in INSERT INTO statement . The code is below. static void ABSChangeEventsTable(string ControlNumber, string CurrentStatus) { using (var connection = new OleDbConnection(strAccessConnAbstracting)) using (var command = connection.CreateCommand()) { connection.Open(); command.CommandText = "INSERT INTO Events (Date_Time, Details, Regarding, User, Control_Number) VALUES (@Date_Time, @Details, @Regarding, @User, @Control_Number)"; command.Parameters.AddWithValue("@Date_Time", DateTime.Now); command.Parameters.AddWithValue("@Details", "OLD

In C#, how do I get the column name from a worksheet in an Excel file? Here is my code so far: ConnectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1\";", "@"C:\file.xlsx"); objConn.Open(); OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM ["xlWorksheet"$]", objConn); OleDbDataAdapter objAdapter1 = new OleDbDataAdapter(); objAdapter1.SelectCommand = objCmdSelect; DataSet objDataset1 = new DataSet(); objAdapter1.Fill(objDataset1); objConn.Close(); Does you connection string include the HDR=YES ?: Provider

Note: answering my own problem to help others in future. I'm reading a CSV file with OleDB: DataTable csvTableSchema = new DataTable(); //Open the CSV string csvFilePath = "C:\\temp\\WithDateColumn.csv"; var connString = string.Format( @"Provider=Microsoft.Jet.OleDb.4.0; Data Source={0};Extended Properties=""Text;HDR=YES;FMT=Delimited""", Path.GetDirectoryName(csvFilePath) ); //To read the csv with DataTypes we specify the columns and their datatypes in the Schema.ini //REF https://docs.microsoft.com/en-us/sql/odbc/microsoft/schema-ini-file-text-file-driver using (var conn = new

Considering that Grade.firstExam, Grade.secondExam, and Grade.finalExam are all TEXT and not numbers , i can't get the exact solution to convert null values into Zeros. I already tried to use NZ() but it returns an error message (Undefined Function 'NZ' in expression) im using VB.net with MS Access as my database. i also imported System.Data.OleDb Namespace. SQLStatement = " SELECT Student.idNumber as 'IDno', " SQLStatement &= " Student.lastName + ', ' + Student.firstName as 'FullName', " SQLStatement &= " Grade.firstExam as 'firstExam', " SQLStatement &= " Grade.secondExam as 'secondExam', "