Use ACE OLEDB To Generate A Dataset From Excel
Jun 12, 2011
Originally I was using Office Interop to import data, but that was a headache and a half for both me and my computer. Right now I'm attempting to load it with ACE, but my data grid isn't being populated. Once that's up and running I need to know how to use that data in other ways, and how to grab specific cells of data from that dataset. I'm using Visual Studio 2008, by the way.
Public Function funcUpdate(ByVal sFileLoc As String) As Boolean
'Determine connection string properties
Dim dbProperty As String
[Code].....
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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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Jan 22, 2011
I am trying to retrieve the data from EXCEL 2003 spreadsheet from row 8 onwards because from Row 1 to Row 7 the row is merged columns from A1 to K1, A2 to K2, A3 to K3, A4 to K4, A5 to K5, A6 to K6, A7 to K7.
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Sep 24, 2010
Im looking into learning OLEdb to run with Excel, Where do i start? has anyone got the full default sample code? and how do i need to set up the Excel test file. Sounds daft but im looking at the system namespace for it and its just looking bafling. What not to put on an Employee evaluation: This employee has hit rock bottom and shows signs of starting to dig.
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Feb 12, 2012
[URL]..a good way to create Excel files without using Ms Excel,but this is C# source code,I used [URL]..to convert from C# to VB.NET,but after conversion There are some strange errors :
Error21Too many characters in character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1625XLSExportDemo
Error22Empty character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1633XLSExportDemo
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Oct 28, 2009
i need to generate an excel sheet from an excel template which contains drop down lists. I need to use the template and populate the with data from datbase and select the appropriate value from the drop down lists and generate the new excel sheet.
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Jan 17, 2011
[Code]...
This is not working, I am getting a syntax error when i try to do for each dr in diarytable.rows
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Feb 24, 2010
I am using asp.net oledb to export information to excel file. I encounter problems when the information to export becomes too big, in this case the code I have given below, the excel file generated becomes an empty spreadsheet.If I changed the loop to 1123 for insertion of the rows. The generated excel file is fine, 1125 rows, and 4 columns shown.A test program in windows form is also working fine regardless of how many rows.[code]I couldn't find a solution to my problem as well. What I did eventually was to run the process using another separate windows service. The code works perfectly fine running from a windows form or service program, but not asp.net, not sure why.
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Aug 31, 2009
Im generating a report for a billing system, user makes a payment and have to print it.I Created a dataset with a custom query, something like select ID,Detail,value,client from. that gives me all transactions.With that I fill a report.Now I need a way to filter so the report only show the current transaction (I have the ID but don't know how to change the dataset query).How can I do this? or there is a better way to resolve this?
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Sep 13, 2011
I had created two button for the previous and next function. I think my logic is correct and the programming did not have any error but still, i failed to navigate through the data.[code]The problems are when i hit the next or previous button, it did not jump to the respective record and it keep on showing the 'end of record' or 'beginning of record' as programmed.
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Jun 7, 2012
How can we read an excel file without using Oledb?
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Jun 6, 2011
For my current Project I need to fetch the data from an excel file.Each second the data in the excel file is changing... What I want to do is, copy it from the excel and Validate it in every second.So I use an Oledb connection to get the data from Excel file... s working excellent for two hours... After 2 hours I am getting an error that"the connection for viewing your linked microsoft excel worksheet was lost......"
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Feb 11, 2011
I'm reading in an excel file with the following code:
Function Read_Excel(ByVal sFile As String) As ADODB.Recordset
On Error GoTo fix_err
Dim rs As ADODB.Recordset
rs = New ADODB.Recordset
[code]....
Cells longer than 255 chars are getting truncated, and I'm not sure if there is a way to stop it easily?
Update: The truncation only seems to happen if I select Distinct. If I leave the Distinct off it shows the full cell.
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Feb 10, 2010
I'm trying to connect excel sheet with VB 2008 in my project, but it show a error message: A first chance exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll
[Code]...
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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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May 7, 2009
Attempting to execute an update command against an Excel 2007 file gives the error:
Operation must use an updateable query. I'm using System.Data.OleDb with a connection string like this:
Dim strConn As String = "Provider=Microsoft.ACE.OLEDB.12.0;" & _
"Data Source=""" & pathToFile & """;" & _
"Extended Properties=""Excel 12.0;HDR=YES"""
I have tried setting ReadOnly=false but that gives Could not find installable ISAM. I have also tried setting Mode=ReadWrite and IMEX=1 which didn't seem to have any effect. My update command is like this:
Dim cmd As OleDbCommand = con.CreateCommand()
cmd.CommandText = "UPDATE [" + sheetName + "] SET [Quantity Error] = 'test' WHERE [Full Name] = 'Mr. Brown White'"
where sheetName was obtained from querying the excel schema. Is it possible to do what I am trying to?
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Aug 13, 2009
I have some excel file, where I have to programatically delete all hidden columns.The problem if that, when I receive these files, the cells are mainly formulas, and as I delete some columns I get some "#REF#" problems.
I thought a bit about the problem an decided to create a function that loops throught all cells and replace the value by its own value, before deleting the columns, via OLEDB:
dt.Rows(row)(col) = dt.Rows(row)(col).ToString I don't know if this works. So I followed an update example I found in google, but it doesn't work:
Dim conexao_Excel As String = "Provider=Microsoft.Jet.OleDb.4.0;data source=" & fileName & ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1;"""
cn = New OleDbConnection(conexao_Excel)
cn.Open()
da = New OleDbDataAdapter("SELECT * FROM [" & sheetname & "]", cn)
da.Fill(dt)
[Code]...
"Update requires a valid UpdateCommand when passed DataRow collection with modified rows." I image this is pretty basic, but I have already lost so much time on this issues...
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Jun 13, 2011
How to write into excel sheet using oledb connection or how to export dataset into excel sheet using oledb connection.
Iam using console application in vb.net. If there are any alternate ways to write into the excel files from dataset.
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Jan 13, 2010
OVERVIEW:I am currently having an issue loading a large number of rows into Excel. I say large because the attached code in fact correctly inserts 50 rows into an Excel worksheet, however, as the number of rows increases to no more than500 rows the data is not inserted into the worksheet. No error is thrown by .net and the .xls filesize actually shows an increase in size, however, when the file is opened there are no rows in the spreadsheet..... Then, when the .xls file is closed the filesize is once again reduced.
Again, the code works for a small number of rows. Are there any known bugs with the OleDB driver for Excel?ADDITIONAL THOUGHTS:I have tried inserting rows to both Excel 2003 and 2007, same issue.I have tried closing the connection after each insert.... performance if horrible and it does not fix the problem.I have wrapped the ExecuteNonQuery in a transaction.... no go....
[code]...
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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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Nov 17, 2011
A While back I developed a application that connected to Excel using DB connection. It worked fine since the application was designed for usage on one particular PC with Excel 2003. I especially liked the solution since the data retrieval was much faster compared to what I would get if I connected to Excel using Interop libraries.
However, recently when I tried to implement the same solution onto another app that would run on various PC that could use different versions of MS Office I ran into multiple problems. First of all, I can't use the same connection string on various versions. Also, the whole x64 vs x86 thing is adding to the problem.
I wonder if there is a way to check the version and use the apropriate connection string for every version?
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Jul 27, 2009
I currently have some code to import a spread into a dataset but it is dependant on the name of the sheet ie sheet1$. I would like this import to work on the first sheet of a xls file no matter what the sheet name is.
vb
Private Function GetAllRows(ByRef objCon As OleDb.OleDbConnection) As DataSet
Dim results As New DataSet("ExcelRows")
Dim com As New OleDb.OleDbCommand("select * from [sheet1$]", objCon)
[code]....
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Aug 30, 2011
This is my first post here so forgive me if I am not following any correct protocols. I am attempting to generate a DataSet and bind it to a datarepeater object. I had been doing this at Design Time and was getting an error message when filling the dataset when the form loaded. So I am basically createing the dataset in my code now when the form loads and binding it to the datarepeater. However, when I attempt to bind the dataset I get a NullReferenceException - even through I know that there are 60 rows of data in the dataset table.
[Code]...
As you can see i have several debug messages in there. I get the error on the last line when setting the datarepeater data source. I try and get data for a specified lot - if it doesn't return any values I create some values in the datatable and add them to the DB. On first load when there is no data this works perfectly. If I then close the form and reload it, it will display fine. However, if I change any of the data (database is updated) and then go back in again, I get the error above.
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Feb 15, 2012
I have this program that uses OLEDB connection to import excel file to data table then use it in other functions.Now I have this question: What are the possible limitations of OLEDB when it reads the Excel file. The File is on xls format, and I want to know if there is such limitations(for example: It has limitation in reading value on a cell).
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May 6, 2011
so i have OLEDB working "Select Where [text-in-top-of-column] = "BOB"...But i need it to work like:"Select Where [column:A$] = "BOB"...(not sure of what sysntext I would use for spesfying the column)I wont allways know what the first row of text is in colom "A".. so i need to just use "A" This is what i have now...
Quote:
Collname = "Some long text name"
MyConnection = New System.Data.OleDb.OleDbConnection _
("provider=Microsoft.Jet.OLEDB.4.0; Data Source='c: estfilex.xls'; Extended Properties=Excel 8.0;")
[code]....
I have tryed adding HDR=No and it does not work... how to use the colom by their default names...?
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Dec 4, 2009
I've done successful updates to Access databases with VB.net code using OleDb lines, with some sample code as follows:
Dim GRDatabase As OleDbConnection = New OleDbConnection("Provider=Microsoft.jet.oledb.4.0;data source=|DataDirectory|OWVGuestRegister.mdb")
Dim GRCommand As OleDbCommand
GRDatabase.Open()
[Code] .....
How to update Excel and Text files the same way?
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Jun 8, 2012
How to read an Excel file without using OLEDB connection string?
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Sep 22, 2009
To query an excel sheet via SQL, I used to use either:
Dim excelConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strPath + ";Extended Properties=""Excel 8.0;IMEX=1;HDR=YES;"""
or
Dim excelConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source= " + strPath + ";Extended Properties=""Excel 12.0;IMEX=1;HDR=YES;"""
Now this worked fine until I installed Office 2010.
Now I get a
Microsoft.Ace.OLEDB.12.0 provider is not registered on this machine
exception.
How can I find out the correct connection string/provider?
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Mar 9, 2010
How can I read specific cell from Excel file using OLEDB Connection with VB.NET?
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Dec 9, 2010
I've create a new VS 2008 Window Form Project using VB. I added an oleDbDataAdapter to the first and only form, set it to a table in my Access 2007 Database (there is only one table, PK field autonum of course and two Memo fields). The Database is in the Project's folder. A standard oleDb Connection object was created, as I expected, then I select the DataAdapter and choose 'Generate Dataset' which produces a standard DataSet called 'DataSet1.xsd'. Now when I build the project I get an error 'Error 1 Type 'FontTest.DataSet1' is not defined.' I do have a reference in my new Project to System.Data.So what the @#%$@ is going on? Why isn't the Dataset create by the DataAdapter being recongized? I can get into the DataSet Designer. The DataTable create is perfect, three columns defined correctly as I expected.
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