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]....
how can I know what are the indexes of the columns in my datagrid?
View 6 Repliesbuilder("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
I have added an XML file (File.xml) into a project (I can see it in the Solution Explorer), it resides at the root directory level of the project i.e. the same level as the VB program (.vb), the bin directory and the References directory etc..
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SQL SERVER 2005, Table1 has data as follows
Date----------sno----------name
14/01/10------1-------------A
14/01/10------2-------------B
[Code].....
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?
I'm writing a little program that will synchronize two access database schema's. It works,to a point.My problem is, I'm unable to identify whats an AutoNumber and whats a Long Integer.Both DATA_TYPES are 3, same with COLUMN_FLAGS, both are 90. a Long Integer that doesn't allow nulls COLUMN_FLAGS will be 90 and its DATA_TYPE will be 3n AutoNumber will also be COLUMN_FLAGS = 90 and DATA_TYPE = 3all other fields I can test by are also identical. etc NUMERIC_PRECISION
View 3 RepliesI have a datagrid, I am filling it with LINQ as well as a custom class to add data to it.Afterwards, I need the data in a specific order - it seems to ignore me.How do I change a columns properties, like index etc??[code]
View 3 RepliesI binded a datagridview with datasource, But its order was changed then I used Columns("ColumnName").DisplayIndex property to arrange the columns of DatagridView. Now I am exporting this DataGridView to Excel, All things are right but problem is about the column positioning, Columns in excel file are shown in wrong order (it shows order before I applied Columns("ColumnName").DisplayIndex property to arrange the columns of DatagridView). My question is that how I permanently change the Column index of DataGridView......?
Public Sub gererateReport(ByVal dg As DataGridView)
Dim oExcel As Excel.Application
Dim oBook As Excel.Workbook
Dim oSheet As Excel.Worksheet
Dim oMissing As Object = System.Reflection.Missing.Value
[Code] .....
It is not so hard to get the field names from a database via GetOleDbSchemaTable and OleDbSchemaGuid.Columns. It works fine. The field names come i alphabetical order though. I really need them in the correct field no order.
Used code:
connection.Open()
Dim schemaTable As DataTable = _
connection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, New Object() {Nothing, Nothing, tblname, Nothing})
[Code].....
i am getting a syntax error at drr(5) which 5 is the column i want to base the color change on. this method works when i am using a dataset
Dim Land As String = "Land"
Dim Air As String = "Air"
Dim Cruise As String = "Cruise"
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I have recently developed a small program which SQL's a MS Access database on a shared folder. I published it to the network folder and many users have installed it fine, but I have had two users who have reported the following error:Could not load file or assembly 'System. EnterpriseServices. Wrapper.dll' or one of its dependencies. The device is not ready. (Exception from HRESULT: 0x80070015)So I went to google and searched on how to get rid of this error and it seems that there are alot of sites to suggest re-installing the .Net 2.0 framework. So i tried to click repair the installation but then hit on another problem:Error 25015. failed to install assembly. 'C:WINDOWSMicrosoft.NetFrameworkSystem.EnterpriseServices.dll because of system error: The device is not ready..So i did more googling and found that it might be due to a HaxDoor virus: url...I am now scanning the system now, but it hasn't picked up any virus yet.What should i do? Is it becuase I am using oledb adapter to access MS access?
View 2 RepliesI have an Access table ("Titles") which is connected to VB.Net using OleDb. The connection variable is conTitles.Some of the column in the table are 'No' and 'Status'.
In the Form, I have a textbox (txtTitleNo) and a button (BtnReserve).I want to put a number in the textbox, and then when I click the button, I want the 'Status' column with the corresponding number to be changed to 'Reserved'.
[Code]...
do you Create Database in MS Access Using Oledb in vb.net?
View 4 RepliesIs it possible to drop an MS Access Database using Oledb in VB.Net?
View 2 Repliesi am developing a project on "sigmoid investment solution" where i have a form where i have to enter all the recent BUY/SELL of shares. and after inserting each record i need a BUY AVG and a SELL AVG. i am using oledb connection to connect to a access database. i want to use the following sql command SELECT AVG(Price_field) FROM table_name WHERE buy_sell="BUY"..i want this result to display on a text box in the form. What is the code to connect to data base executing the query and displaying the result in a textbox.
View 1 RepliesI wonder is there another way to connect,edit access database with out using OLEDB command.I want to insert,delete data from access table without using oledb.
View 3 RepliesFor some reason every time I execute the code, it gives me the error "No value given for one or more required parameters" and it points to the ExecuteNonQuery. Below is the relevant code I have.
Public Function sqlUpdate(ByVal varBalance As Double, ByVal varWithdrawlAmount As Double) As Double Dim dbCon As New OleDb.OleDbConnection dbCon.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = dbATM.mdb" Dim query As String Dim cmdUpdate As New OleDb.OleDbCommand dbCon.Open() varBalance = varBalance -
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in pervious version of VB (DAO 3.6) I used to be able to delete a query object and then creating it again (not the records) using the code below. but I am having a hard time finding how to do it using the OleDb in VB.net.
Dim ws As Workspace, db As Database
Dim qy As QueryDef
db.QueryDefs.Delete ("WISE QUERY")
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Editting and Updating Access with OleDb commands. VB9
View 14 RepliesI am creating some basic software for our manufacturing department. I am using Visual Studio 2008 using Visual Basic.The software has a user log in. There is a form in which the choose the worker name, the item they were making, how many were made, damaged, or received damaged from the supplierHowever when they click on the "Update" button to insert the record..i get my custom message that it failed and the record is not inserted. I put a TRY...Catch... around the insert query and it didn't generate an error message.I have been following the code in the OLEDB BASICS tutorial so I am not sure what the problem is at this time.
<add name="MFCTData"
connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\Data.mdb;Persist Security Info=True"
[code]....
I do not have a lot of experience in vb.net, but I am trying to use OleDB to insert a record with String,string,Yes/no(studentname, number, gender). However when I insert it , there's a exception raised stating that I have invalid syntax for the "insert into" query. I could not spot the error.
Test case:
txtName.Text = "asdasdasd"
txtPhone.Text = "123456789"
rGender.Checked = True
[Code]...
I have been scouring these forums and the internet in general as well as doing a lot of reading, all to no avail. I can not seem to successfully update the Access database from an edited DataGridView. I am trying to use Stored Procedures that are in the Access database and work fine therein. The DGV is filled in properly. I have tried an ever-increasing number of variants to update the database (Private Sub BtnUpdate...) without success. [cod]e....
View 6 RepliesI have a program (below) which runs an SQL query on an Access database to bring back records based on the date a user selects. This issue seems to be that US date formats are the only date formats that SQL queries accept. I may be wrong, but this is my understanding. All my dates in the database are in EU date format (dd/mm/yyyy). What happens when i run my code is that I can not access a record with the date of 08/05/2010 unless the input date is 05/08/2010.
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I've recently made another question about connecting to MS-ACCESS database with .NET in C# or VB.NET. It worked just as intended with MDB, but with accdb it caused an exception in
conn.Open();which follows:
Is there another way to do this? My original intention (like stated in the original question) is gathering some (actually, a lot of) fields.
my table name is "temp", and one of the field is item_id..how can i count how much item_id was added in this table...??is the code "SELECT item_id, COUNT(*) FROM temp GROUP BY item_id"it doesn't work.. i'm using OLEDB connection and can't use sql property
View 8 RepliesIf (Tech_TextBox.Text <> "9999") Then
If File.Exists(ExportFolder + "" + Tech_TextBox.Text + ".pdf") Then
txtRouted.Text = txtRouted.Text + vbLf + Tech_TextBox.Text
myFileName = (ExportFolder + "" + Tech_TextBox.Text + ".pdf")
If cbPDFPrint.Checked Then
Dim MyProcess As New Process
[Code]...
I have created an auto emailer to distribute our work routes for my colleagues. Problem is I made it easy for the management team to update the list. List is ordered by Tech Number, First name, Last name, Email address.
I have coded this in VB.NET 2008 using Database sources and drag-n-drop the table on the form. I let VB do most of the coding of the connection and text boxes. (IE If (Tech_TextBox.Text <> "9999") Then)What I would like to do, instead of using a bogus tech number as an exit. I need an 'IF Then" or 'DO UNTIL' after last record.
I am connecting to a MS-Access 2007 database using VB 2010 and OLEDB. Conducting the following test seems to suggest that MS-Access does not interpret DBNull.Value correctly when sent as a parameter from OLEDB:[code]
View 2 RepliesI am trying to populate a listbox from an access database. It is a scheduling database. First my users pick a room they would like to add an event to, then a date. after the date is selected, id like the listbox to populate with meeting titles corresponding to the date they selected. The code so far looks like this:
[Code]...
How do I implement the ExecuteScalar method to return the first element in a sorted dataset?
Here is my code:Imports System.Data.OleDb
Sub Dim oCmd As OleDbCommand
Dim strConn As String
Dim strQuery As String
strConn &= "Provider=Microsoft.Jet.OleDb.4.0;"
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