oledbexception

specified cast is not valid

由 [亡魂溺海] 提交于 2019-12-25 16:51:44
问题 Here is a code that retrieve values from the database, but my problem is that it throws out an exception saying "InvalidCastException was unhandled specified cast is not valid". I am now confused what went wrong, The code and the table stated below. Here is the code: Public connstring As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source =" & Application.StartupPath & "\TestData.accdb; Persist Security info = false" Public Conn As New OleDbConnection Private Sub TestForm_Load(ByVal

The Microsoft Office Access database engine cannot open or write to the file ''

由 余生颓废 提交于 2019-12-24 00:53:04
问题 Data needs to be read into .net gridview from excel worksheet. Here are the aspx and aspx.cs codes. ASPX: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Read and Display Data From an Excel File (.xsl or .xlsx) in ASP.NET</title> </head> <body> <form id="form1" runat="server"> <div> <b>Please Select Excel File: </b> <asp:FileUpload ID="fileuploadExcel" runat="server" />  

System.Data.OleDb.OleDbException: Operation must use an updateable query [closed]

由 那年仲夏 提交于 2019-12-22 10:44:39
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I'm confused. I'm trying to add a single record into an Access 2000 database using ASP.Net. However, when I try to add new record, I get the following error: Exception Details: System.Data.OleDb.OleDbException: Operation must use an updateable query. 回答1: Admittedly, the error message is misleading. The reason

Syntax error in INSERT INTO statement in c# OleDb Exception cant spot the error

由 拜拜、爱过 提交于 2019-12-13 05:45:10
问题 EXACT duplicate of Syntax error in INSERT INTO statement in c# oledb? Hi I cant spot the error. Please help. There is an OleDb Exception due to a Syntax Error. Syntax error in INSERT INTO statement OleDb Exception is unhandled. private OleDbConnection myCon; public Form1() { InitializeComponent(); myCon = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C.mdb"); } private void insertuser_Click(object sender, EventArgs e) { try { OleDbCommand cmd = new OleDbCommand(); myCon

ACE oleDb drivers unable to handle huge excel files

由 柔情痞子 提交于 2019-12-12 10:09:02
问题 Does ACE OLEDB drivers have any known issues with larger files? I am using the below code to retrieve the worksheets in a 400Mb xls file public string[] GetWorkSheets() { var connectionString = "Provider=Microsoft.ACE.OleDb.12.0; data source=c:\filepath\filename.xls; Extended Properties=\"Excel 8.0;IMEX=1;HDR=YES;\""; DataTable dataTable; using (OleDbConnection connection = new OleDbConnection(connectionString)) { connection.Open();//Exception thrown here for large files dataTable =

System.Data.OleDb.OleDbException: System resource exceeded

由 ℡╲_俬逩灬. 提交于 2019-12-12 04:47:55
问题 I am getting this issue while trying to read data from an excel file using OleDb. This is working fine on my test server (Window Server 2008) but not working in UAT server with the same configuration. It used to work on the UAT server, but suddenly stopped working. I tried solutions from these sources, but nothing worked: Intermittent "System resource exceeded" exception for OleDB connection to Microsoft Access data file OleDbException System Resources Exceeded System resource exceeded using

System.Data.OleDb.OleDbException invalid argument

由 给你一囗甜甜゛ 提交于 2019-12-11 21:59:17
问题 I'm uploading an excel sheet, and want to move its data to another table in the database. The last two days I've been getting an error ( System.Data.OleDb.OleDbException invalid argument ), however, if I design a very simple application, it works fine. Please Help me Using conn As New SqlConnection(ConfigurationManager.ConnectionStrings("TERAMSConnectionString").ConnectionString) Dim path As String = FileUpload1.PostedFile.FileName Dim excelConnectionString As String = ("Provider=Microsoft

OleDbException was unhandled by user code in c#

由 痞子三分冷 提交于 2019-12-11 20:28:29
问题 Here is the cs file: public int CheckExisting(String sqlDbQry, String sTable) { Qry = sqlDbQry; con = new OleDbConnection(connectionstr); if (con.State == ConnectionState.Open) con.Close(); con.Open(); cmd = new OleDbCommand(Qry, con); dr = cmd.ExecuteReader(); while (dr.Read()) rQry = Convert.ToInt32(dr[0].ToString()); con.Close(); return rQry; } Here is my another cs: protected void btnsub_Click(object sender, EventArgs e) { if (objAdmin.CheckExisting("SELECT COUNT(*) FROM registration

what should I do in “Data type mismatch in criteria expression”

由 二次信任 提交于 2019-12-11 07:54:30
问题 Why am I getting this error? "OledbException was unhandled" "Data type mismatch in criteria expression." There is no problem when I am querying a string data type, but when I am querying a integer data type, I am always getting this problem.. I am using microsoft access 2007 here is my source code: Public Function searchMemberId(ByVal userId As String) As DataSet sqlStr = "Select Member_ID From tblMemberInfo Where Member_ID = '" & _ Val(userId) & "'" ds.Clear() da = New OleDbDataAdapter

ACE oleDb drivers unable to handle huge excel files

由 廉价感情. 提交于 2019-12-06 07:53:26
Does ACE OLEDB drivers have any known issues with larger files? I am using the below code to retrieve the worksheets in a 400Mb xls file public string[] GetWorkSheets() { var connectionString = "Provider=Microsoft.ACE.OleDb.12.0; data source=c:\filepath\filename.xls; Extended Properties=\"Excel 8.0;IMEX=1;HDR=YES;\""; DataTable dataTable; using (OleDbConnection connection = new OleDbConnection(connectionString)) { connection.Open();//Exception thrown here for large files dataTable = connection.GetSchema("Tables"); } int lenght = dataTable.Rows.Count; string[] worksheets = new string[lenght];
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