OleDb Jet Cant Read More Then 256 Columns?

Dec 12, 2009

builder("Provider") = "Microsoft.Jet.OLEDB.4.0"
builder("Data Source") = IO.Path.GetDirectoryName(Me.OpenFileDialog1.FileName)
builder("extended properties") = "text;HDR=Yes;FMT=Delimited;"

I am using this to connect to a textfile database, but ti wont read over 256 columns like excel. Is there any kind of work around short of changing my database file which isnt an option

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GetOleDbSchemaTable(OleDb.OleDbSchemaGuid.Indexes - How To Access Included Columns On Index

Oct 7, 2011

dt = GetOleDbSchemaTable(OleDb.OleDbSchemaGuid.Indexes...
dt.Rows(i).Item("Index_Name") ==> gives the index name
dt.Rows(i).Item("Column_Name") ==> gives the column name on which we created the index

[code]....

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Oledb To Read Excel File

Jun 22, 2010

I have always used Excel.interop before but I thought oledb would be simpler because, for this application, I only have to read the data which it can't seem to do. It accesses the file alright because I can't open the file while I am at a breakpoint. It attempts to read the file because oExcelReader.fieldcount = 14 which is correct. oExcelReader.hasrows = true which is not correct. The line where I use getstring(1) errors out and says there is no data for this row/column.

[Code]...

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Read Empty Excel File Using OleDb?

Nov 15, 2011

Using OleDbDataReader, how does one determine if the Excel workbook is empty? BTW, OleDbDataReader.HasRows seems to always be True even for a workbook with no data.

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Read An Excel File Without Using OLEDB Connection String?

Jun 8, 2012

How to read an Excel file without using OLEDB connection string?

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Read Specific Cell From Excel File Using OLEDB Connection?

Mar 9, 2010

How can I read specific cell from Excel file using OLEDB Connection with VB.NET?

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Csv Column Contain Mix Datatype Connot Read All Cell Data Using Oledb Provider?

Jul 22, 2010

my csv contain mix datatype f.ex. in cell E8 data format is date, and other data in this E column are string.i use this connetion string in classic asp ,VB Script and back end SQl server

ChekCnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Path1 & ";Extended Properties=""text;HDR=YES;IMEX=1;FMT=Delimited"""
Set rs1 = ChekCnn.Execute("SELECT * FROM myCSV.csv")

[code].....

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X86 App On Machine With Office X64 Installed Read Xls, Xlsx, Mdb And Accdb Files Using System.Data.OleDb?

Apr 19, 2012

Question: How do I programmatically determine which provider to use (Microsoft.Jet.OLEDB.4.0 vs Microsoft.ACE.OLEDB.12.0) when my app runs as a 32-bit process on a machine with Office x64 installed?

I'm developing a VB.net WinForms app in VS 2010 and targeting both x86 and x64.The app processes data from xls, xlsx, mdb and accdb files using System.Data.OleDb:Dim oConn As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=...")

The x64 version of the program works as expected. The x86 version works as expected on a system with Office x86.When I run the x86 version on a machine with Office 2010 x64, I get the following exception when trying to open a connection:

The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.I believe this is because I'm running Office 2010 x64 so the x86 data access components are not installed.I can get it to work for Office 2003 files (*.mdb and *.xls) by changing the provider to Microsoft.Jet.OLEDB.4.0.

How do I figure out which provider to use when running as a 32-bit process on a machine with Office x64 installed?Ideally, I'd like a function:If ProviderIsAvailableFor("Microsoft.ACE.OLEDB.12.0") Then

Else If ProviderIsAvailableFor("Microsoft.JET.OLEDB.4.0") Then

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Read In Only The First 2 Columns Of A Txt File?

Aug 11, 2011

I'm trying to read in only the first 2 columns of a txt file into 2 lists but am having problems getting the split function working. When I read the file the first strfields = "5.000 300.000" and the second strfield falls over.

Samples text:

0.000 300.000
5.000 300.000
10.000 300.000

[Code].....

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Read A Text File's Columns?

Jun 17, 2009

Essentially my program asks the user for their name and a number, and it stores both values in a text file. However, when retrieving the code from a particular line it cannot separate the number from the person's name.will I have to use a new line for every entry, or is there some way to tell my program to differentiate between columns in the code?

[code]....

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[2008] Read Only Columns In DatagridVeiw?

Feb 13, 2009

I want a Database read only and shown up in a datagridveiw without the user being able to edit the data into a certain column.Example i have a Database:

*In my Column is "ID","Name"
*Then in my Rows is "Ryan",Mark"

How can i display these data into in datagridveiw.....Cause i want to create a displaying records in datagridveiw..

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Efficiency Of Oledb - Got 10+ Users Using Files, Via A Oledb To Put Info Into An Excel Spreadsheet

Oct 18, 2010

Just wondering if i might hit a snag in my program. Ive got 10+ users using the same files, via a Oledb to put info into an excel spreadsheet. If 2 or more people save there file at the same time will the program go into read only on one person. Normally one 3 will use the file at one time. I know Sql itself would be better to use. best way i can describe it, normally using excel if you manage to open the same file twice one opens as normal but the other opens as a Read only file, will the same thing happen if im using Oledb connections?

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Read A Text File That Contains 2 Columns Of Numbers?

Oct 13, 2009

i\m trying to do an application that read a text file that contains 2 columns of numbers and put it in 2 columns in a table

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Read A Textfile And Load Columns Into A Sql Table?

Oct 29, 2009

I receive this error using the following code when the executeNonquery() line I am trying to load data from refnum to a column in the table

The variable name '@refnum' has already been declared. Variable names must be unique within a query batch or stored procedure.[code]...

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Reading Excel In .NET - Some Columns Are Read In As Null?

Sep 27, 2009

Reading Excel in .NET - some columns are read in as null

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Change Order Of The Columns Read From Database Into A Datagridview?

Jun 30, 2012

I am reading a record from a database into a datagridview.I have changed the column "ComputerAwareness" from a textbox column to a combobox column.This column is at the 21st position in the database but after changing it to a combobox in datagridview it is diplayed as the first column in the datagridview.How can I keep the position of this column same as in the database?I have googled a lot for the solution and tried all the possible ways but none seem to work.One of the ways I tried is in the code below.

Private Sub DisplayButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DisplayButton.Click
Dim cs As String = "Provider=Microsoft.ACE.OLEDB.12.0 ;Data Source=C:\Users

[Code].....

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LINQ VB To Read Many Columns (or Fields) In One Row Record Data?

Oct 1, 2010

The LINQ VB code below is to read the first record data for database table
ProductTable that has 3 colounms (or 3 fields):

TableCol1, TableCol2, TableCol3. The reading data is stored at variable
MyArrayFirstRow.
'-------start LINQ VB code in Visual Studio Web Developer 2008-------'
Dim MyArrayFirstRow

[Code].....

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Open - Edit - Read Excel File Columns?

Sep 23, 2009

How do I open, edit, read excel columns in vb.net? Like, for example, I want to know the values of column B up to the cell that it contains values.

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VS 2010 - Dataset Readxml - Read Only Certain Elements (columns)

Oct 5, 2011

Dataset's ReadXML() method would read an XML document. But how would we skip certain columns? [Code] So, if I use ReadXML(), it would read the whole document and the dataTable would have "id" column, "name" column and "price" column. But I want to have only "id" and "name" column. How can I skip certain columns from reading it?

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Change Font Color Of DataGridView Header Text For Read Only Columns?

Jan 9, 2012

How to change the font color of the column header text in my datagridview if the entire column is read-only. I basically use a loop to add columns to my datagridview and then set the properties of the columns. But for some reason setting the DefaultCellStyle.ForeColor and HeaderCell.Style.ForeColor properties does not work. The header text is still black.[code]...

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DB/Reporting :: Text To Access - Read From Left And Split Text To Columns

Feb 20, 2009

how can i import text from text file to access so that:

Text sample:
F2009021908362600111154050110230000203024116461000000000001000

Would be in access

Col1|Col2|Col3|Col4|Col5 and so on.
F|2009|02|19|08

So the point is, how can i put vb to read from left as many characters i want and put the selected range in to access?

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DataGridView, Set Up Columns, Populate Data Table, Bind, But Not Using Columns Created In Code?

Oct 26, 2011

I'm using VB.net 2005. I have working programs that I populate DataGridViews with something like the following:

[Code]...

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Add/subtract/divide/multiply Certain Columns And Place The Information Into Other Columns?

Nov 30, 2010

My goal is to connect to my database either manually or using an sqladapater, and get information from two of my databases on sql server 2005. Then I want to take this information and on run-time begin to add/subtract/divide/multiply certain columns and place the information into other columns. I can do this in queries, however, I want to do it on run-time what is the best way to achieve this.I had some of this working, but I just want to start fresh and see how you would go about doing this.

[Code]...

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.net - Aggregate The Columns To Group On The Period And Sum The Count Columns?

Jun 29, 2011

I have the below Linq query that is returning the data but I need to aggregate the columns to group on the Period and Sum the Count columns. How do I go about doing this?

LINQ
from t In tblTimes
join h In tblEngineeringDashboard_CADMachinesCounts on t.ID Equals h.TimeID
Order By t.Period

[code].....

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Adding Columns And Modifying Columns In Access Database Using NET/SQL?

Oct 15, 2009

I am using the following code to alter an table imported from an Excel spreadsheet

Dim SQL As String = "ALTER TABLE receipts ADD payee integer, account integer, category integer, reconciled boolean"
Dim dataread As New OleDb.OleDbCommand()
dataread.Connection = Connection1

[code]....

Both ExecuteNonQuery() actions yields the exception message {"Syntax error in field definition."}The error message does not happen with the first if the boolean column is not there (I tried Tes/No as a definition - but that also failed.The second query to modify the ID column from autonumber to integer I assume fails because it is a Primary KeyHas?

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Organize Columns - One Table Which Have Tree Columns (ID, Number, Name)

May 23, 2011

Imagine the following scene: I have one table which have tree columns (ID, Number, Name).

A Select query result on this:

code:

Now, the user deletes the Number 3 and 4. So, now the Select query is going to be:

code:

And I want to have:

code:

How can I organize the column?

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Asp.net - Averaging Columns In A Table - Ignoring Certain Columns

Feb 21, 2011

I've the following code which successfully makes an average for all the columns from a table. What I need to do though is ignore certain columns in this equation.

Dim totalNumber as Double = 0
Dim count as Integer = 0
For x = 0 To xyz123.Tables(0).Columns.Count - 1

[Code]....

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Averaging Columns In A Table - Ignoring Certain Columns?

Feb 28, 2010

Averaging columns in a table - ignoring certain columns

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How To Use Something That Functions Like Label Box But Can Handle Several Columns And Columns?

Feb 18, 2010

What should I use and how to use something that functions like a label box but can handle several columns and columns? Something that looks like this. [code] Name | Age | Birthday are headers and the letters are variables

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Original DataTable Object Has Columns Added When Variable Has Columns Added?

Oct 6, 2011

I have a datatable property called prpParametersTable in a class called clsBatch. I have a procedure that sets a datatable variable called dtP equal to prpParametersTable at the beginning of the procedure. I then add three new columns to dtP.Here is my problem. When I add the three new columns to dtP my original table prpParametersTable also gets those columns added to it, why? I only want to add the three columns to dtP and not prpParametersTable. How can I do that?

Private Function prvfnc_InsertBatchParameters(ByRef cnn As SqlConnection, ByRef trans As SqlTransaction) As String
' set new columns that have BatchID, Insert DateTime, and UserID for the SQLBulkCopy method below
Dim clm As DataColumn
Dim dtP As DataTable = clsBatch.prpParametersTable

[code]....

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