oledb

问题 How can I replace D:\temp\test.xls with filePath in OleDbConnection statement. I can get the exactly filePath (with OpenFileDialog, then I can located my .xls file conveniently, no more hardcoded), but when I insert the variable filePath as Style2, it doesn't work. How can I fix this ? Thanks. Style1 OleDbConnection dbConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\temp\test.xls;Extended Properties=""Excel 8.0;HDR=Yes;"""); Style2 OleDbConnection

问题 I set a numeric primary key, and an alphanumeric field that stores truck FINS, which is just a random mix of numbers and letters. I do not generate the fins, these fins will always be the same as it's the truck fleet identification number. Here is the code view: storeTruckSplit = truckSplit[1];//Stores truck FIN //Update truck value try { conn.Open(); OleDbCommand command; command = new OleDbCommand( "Update Trucks" + " SET Trucks.TruckInUse = ? WHERE TFIN = " + storeTruckSplit.ToString(),

问题 I am using oledbconnection to sort the first column of csv file. Oledb connection is executed up to 9 million records within 6 min duration successfully. But when am executing 10 million records, getting following alert message. Exception calling "ExecuteReader" with "0" argument(s): "The query cannot be completed. Either the size of the query result is larger than the maximum size of a database (2 GB), or there is not enough temporary storage space on the disk to store the query result." is

问题 I am using oledbconnection to sort the first column of csv file. Oledb connection is executed up to 9 million records within 6 min duration successfully. But when am executing 10 million records, getting following alert message. Exception calling "ExecuteReader" with "0" argument(s): "The query cannot be completed. Either the size of the query result is larger than the maximum size of a database (2 GB), or there is not enough temporary storage space on the disk to store the query result." is

问题 The problem: I'm trying to insert a date time into an access database using the Oledb interface in C#. Hacking solution: Generate my on insert string without using command.Properties I can insert text into the database with no problem, but when trying datetime, I end up with this error: System.Data.OleDb.OleDbException {"Data type mismatch in criteria expression."} There are several posts similar to this but alas with no working solution. Here is my code: void TransferData() { string instCmd

问题 Why does this keep telling me Syntax error in INSERT INTO statement I searched for more details but it keeps telling me this. This is the code : Imports System.Data Imports System.Data.OleDb Public Class f9 Dim ds As New DataSet Dim da As OleDb.OleDbDataAdapter Dim con As New OleDb.OleDbConnection Dim dbProvider As String Dim dbSource As String Dim sql As String Private Sub f9_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load dbProvider = "Provider=Microsoft

问题 Why does this keep telling me Syntax error in INSERT INTO statement I searched for more details but it keeps telling me this. This is the code : Imports System.Data Imports System.Data.OleDb Public Class f9 Dim ds As New DataSet Dim da As OleDb.OleDbDataAdapter Dim con As New OleDb.OleDbConnection Dim dbProvider As String Dim dbSource As String Dim sql As String Private Sub f9_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load dbProvider = "Provider=Microsoft

问题 I'm using ASP.NET 4.0 with C# for an web application. There was a part to import data from excel file. I've used Microsoft.Jet.OLEDB.4.0 to do that. The process is- Upload the file to App_Data directory Retrieve data to a list Delete uploaded file from App_Data It works fine from my localhost. But when I hosted the site at Godaddy, it fails to perform data extraction. Server Error in '/' Application. Security Exception Description: The application attempted to perform an operation not allowed

问题 I'm using ASP.NET 4.0 with C# for an web application. There was a part to import data from excel file. I've used Microsoft.Jet.OLEDB.4.0 to do that. The process is- Upload the file to App_Data directory Retrieve data to a list Delete uploaded file from App_Data It works fine from my localhost. But when I hosted the site at Godaddy, it fails to perform data extraction. Server Error in '/' Application. Security Exception Description: The application attempted to perform an operation not allowed

问题 If I want to retrieve a value that is saved as a number in an access database. Im using the following: Dim sql As String = "SELECT ArithmeticScore FROM " & tablename & " WHERE DateAscending = '" & todaysdate & "'" Using connection As New OleDbConnection(getconn) Using command As New OleDbCommand(sql, connection) connection.Open() scorevalue = CDec(command.ExecuteScalar()) 'Data type mismatch in criteria expression. connection.Close() End Using End Using MsgBox(scorevalue) getconn = connection