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.
I'm working on a project using SQL Server Express 2008 R2 and Visual Basic 2008.My table has 8 text fields, each using the data type VarChar(num) with the number(num) ranging from 5 to 50. There are also number fields and a boolean field in the table.When I try to insert or update the table in Visual Basic the program runs through to completion, but the VarChar fields only contain the first character. The other fields come out fine. If I create the record in SSMS the fields are not truncated.
View 13 RepliesJust 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?
View 2 RepliesI 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.
View 28 RepliesIm 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.
View 8 RepliesI 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.
View 1 RepliesHow can we read an excel file without using Oledb?
View 3 RepliesFor 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......"
View 1 RepliesI'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
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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.
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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?
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...
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].....
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.
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....
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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.
View 1 RepliesA 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?
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]....
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).
View 6 Repliesso 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...?
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?
How to read an Excel file without using OLEDB connection string?
View 2 RepliesTo 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?
How can I read specific cell from Excel file using OLEDB Connection with VB.NET?
View 2 RepliesTrying to export fields to excel. Have set the references to Excel 12, But, the i, j loop cuts short the number of fields to export to 10 when there are about 16 to export.
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I am trying to read some data from an Excel 8.0 worksheet using OLEDB thusly:(Warning - contains curly braces)
Code:
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
using (DbConnection connection = factory.CreateConnection())
{
[code]....
The problem is that for some columns it sets the data type to be Double even though the spreadsheet column format is "Text" and teh column contains non-numeric data. Then when it gets to that cell it returns DBNull instead of the text value.
I have tried to import an Access Request in Excel. However, the last field (SP) contains Null cells and it seems that it prevents the importation in Excel. There is a way to change Null cells?
Sub Creating_Universe()
Dim connFI As ADODB.Connection
Dim rs As ADODB.Recordset
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I created an e-mail program in VB2008. I have an excel file with a list of all e-mail addresses and attachments to those e-mail addresses. What I want to do is import thethe e-mail addresses and attachments into my program. I want my program to then take each e-mail address (automatically) and insert them with their attachments into their respectable fields in the program. The primary objective is to insert 200 e-mail addresses and attachments. Each attachement is significant to each e-mail address.
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Issue: The .xls file has about 800 records but it's only importing about 480 records. I step through each row and find out that some rows have null values.After spending some time I believe I figured out why this is happening. My first field is a SKU value. The first x rows have all numeric values. Then it gets to a SKU like '1234-SE' and this row doesn't have data. So it's like it takes on the field type of the first data type.Question: Is there a way to order the data before I populate the dataset? I tried to do an order by but didn't work.My current code that is not working as I want.**NOTE: I have tried 'ORDER BY SKU ASC' and didn't work as well.
Sub FillDataSet(ByVal sFile As String, ByVal sTab As String)
Dim containsHDR As String = "Yes" 'Change to "No" if it doesn't
Dim strConn As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" & _
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I accidentally submitted it before realizing that I probably should have selected the "Visual Basic General" forum. I am attempting to retrieve file properties of all files in a particular folder. I have used objFolder.GetDetailsOf... to retrieve the desired information of Excel workbooks saved in Excel 2003 format, but I cannot retrieve the information from files savied in Excel 2010 format.
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