oledbconnection

Selecting the Excel sheet used range using OLEDB Connection

由 自闭症网瘾萝莉.ら 提交于 2019-12-08 12:25:16
问题 Is there any way to select the Excel sheet used range via OLEDB Command object? Because I have an Excel file that has 400 rows, but when I delete 200 rows and try to select the sheet again, it's selecting up to 400 rows again instead of selecting the 200 rows. This is the code which I've written to select the sheet: oledbConn = new OleDbConnection(connectionString); oledbCmd = new OleDbCommand("select * from [Sheet1$]", oledbConn); oledbConn.Open(); oledbDr = oledbCmd.ExecuteReader(); while

Microsoft.ace.oledb.12.0 not registered on the local machine

由 戏子无情 提交于 2019-12-08 05:16:03
问题 i have a situation in which i have to inport the Excel sheet or file to my database using vb.net i know the code and the process for doing this but the issue is I have 64 bit operating system having 32 bit MS Office and i don't want to change my Configuration from to 86bit due to some othere reason so now what should i do any prefer solution any one face same solution like this my code is Dim MyConnection As System.Data.OleDb.OleDbConnection Dim DtSet As System.Data.DataSet Dim MyCommand As

C# Issue: What is the simplest way for me to load a .MDB file, make changes to it, and save the changes back to the original file?

由 做~自己de王妃 提交于 2019-12-07 07:43:24
问题 My project that I am working on is almost finished. I am loading a .MDB file, displaying the contents on a DataGrid and attempting to get those changes on the DataGrid and save them back into the .MDB file. I am also going to create a function that allows me to take the tables from one .MDB file and save it to another .MDB file. Of course, I cannot do any of this if I cannot figure out how to save the changes back to the .MDB file. I have researched Google extensively and there are no answers

Does OledbConnection.Dispose() close the connection? [duplicate]

由 隐身守侯 提交于 2019-12-07 02:32:25
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Is there any need to close a DbConnection if a using clause is used? Does OledbConnection.Dispose() close the connection? I am aware that SqlConnection does but what about OledbConnection ? 回答1: Yes, it also does. Source: OleDbConnection.Dispose Method (Boolean) The Dispose method calls Close, and removes the OleDbConnection from the connection pool. For detailed information see the Remarks section on the

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];

OLEDBConnection.Open() generates 'Unspecified error'

由 廉价感情. 提交于 2019-12-06 03:05:05
I have an application that uploads an Excel .xls file to the file system, opens the file with an oledbconnection object using the .open() method on the object instance and then stores the data in a database. The upload and writing of the file to the file system works fine but I get an error when trying to open the file on our production server only . The application works fine on two other servers (development and testing servers). The following code generates an 'Unspecified Error' in the Exception.Message. Quote: System.Data.OleDb.OleDbConnection x = new System.Data.OleDb.OleDbConnection(@

How to create a table before using sqlbulkcopy

由 余生长醉 提交于 2019-12-05 22:55:16
问题 I have a DBF file which I am trying to import and then write that to a SQL table. The issue I am running into is if I use SqlBulkCopy, it requires me to create the table in advance but that is not possible in my scenario as the dbf file changes constantly. Here is my code so far: public void saveDBF() { //define the connections to the .dbf file OleDbConnection oConn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+ Path.GetDirectoryName(tbFile.Text)+";Extended

System.Data.OleDb.OleDbConnectionInternal..ctor: Unspecified error

由 自古美人都是妖i 提交于 2019-12-05 07:14:23
After several hours (~6 hours Win7 64bit, ~24hours WinXP) of running multi-threaded (.NET Framework 3.5 SP1 WinForms) desktop application using .mdb files as backend I'm getting the following runtime error: Exception -> Unspecified error StackTrace -> at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory

Excel reading in ASP.NET : Data not being read if column has different data formats

由 大憨熊 提交于 2019-12-04 17:09:30
I have an asp.net C# application where i am reading the contents of a spreadsheet using OLEDBConnection. I am using the below line of code to read from the excel spreadsheet. OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fullFilePath + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'"); One of my column has data in various formats like strings,numbers,date etc in various rows.When running this ,When the data format is different,its not reading that value fromthe excel file. I searched in net a lot and found that we need to mention IMEX proprety in

Reading from Excel: Microsoft.Jet.OLEDB.4.0 error on 64 bit systems

由 时间秒杀一切 提交于 2019-12-04 12:13:49
问题 I am reading the contents of an excel sheet in my application using: OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName + ";Extended Properties=Excel 8.0"); _myDataSet = new DataSet(); OleDbDataAdapter myCommand = new OleDbDataAdapter(" SELECT * FROM [" + "My Sheet" + "$]", con); myCommand.Fill(_myDataSet); con.Close(); This is failing in 64 bit systems with the error: Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine
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