US / EU Date Formats SQL Query In MS ACCESS Using OleDb
Aug 19, 2010
I 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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Dec 2, 2007
For 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 -
[code]....
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Nov 1, 2010
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")
[Code].....
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Oct 1, 2011
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]
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Nov 5, 2011
My Australian dates (dd/mm/yyyy) are being converted to U.S. date format (mm/dd/yyyy) despite using custom date specifier for Access table fields.Allen Lamb
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Mar 7, 2008
Is there any way to make VB.NET to accept for all Date Formats as in VB6.0...I'm upgrading VB6.0 applications to VB.NET... Here I'm finding the Functionality difference due to VB.NET feature which goes for System date Settings.I tried using CultureInfo. But it also specifies only one format at a time..removing this functionality difference
Explanation : IsDate("MM/DD/YYYY") Returns False if the system date setting is of "DD/MM/YYYY"
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Jul 17, 2011
I'm connecting to a MS Access DB using ADO.NET.
edit: i'm using VS 2010 I want to perform an SQL query based on certain criteria using the following string:
SQL = "Select * from tblTransactions " & _
" WHERE holding_PM_code='" & cbPMCode.Text & "'" & _
" AND transaction_status='Active'" & _
[Code]...
Should I pass a parameter in the query or shouldn't this suffice? edit2: i've checked the SQL and it does show the correct date format to search for (ie, dd/MM/yyyy)... but when I hover the mouse cursor over over 'dtiAsAtDate.Value' it comes up as '#mm/dd/yyyy#'.
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Feb 4, 2010
Using OLE and Jet, you may receive errors when saving system dates and times to databases in different regions.Consider what happens when saving dates and times returned using the Now() function in Canada or the US: the date string "#2010/02/03 08:59 AM#" will save fine. If using 24 hour time, the string "#2010/02/03 08:59#" will also save fine.
If you change your system region to Spanish (Peru) or Spanish (Mexico), the ante meridiem changes from "AM" to "a.m." (or "p.m."). The date string becomes: "#2010/02/03 08:59 a.m.#"Note that this will NOT save correctly to the database and throw a System.Data.OleDb.OleDbException. The workaround we use is: Public Function clean_date(ByVal strDate As String) As String Dim str_buffer As String
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Aug 25, 2009
i have to update the values in my database some of them are integer, some string and some date (as you can infer from the formatting)
i am using the following query:
UPDATE PatientProfile SET HospitalRegNo=" + hregno + ", PatientName='" + pname + "', PatientAge=" + page + ", PatientSex='" + psex + "', Address='" + add + "', ContactNo='" + cno + "', AdmitDate=#" + adat + "#, OperDate=#" + odat + "#, DischargeDate=#" + ddat + "# WHERE PatientNo=" + pno + ""
but its not working... i think there's a problem in formatting the date type variables
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Feb 4, 2012
I'm running Microsoft Visual Basic 2010 Express on Windows 7, using a Regional Setting set to New Zealand.
When I enter a date in a NZ format (d/mm/yyyy), the IDE highlights the date and tooltip reports date constant not valid. But it is valid for NZ! Meanwhile, the IDE happily accepts dates in the US format.
I would have expected VB to look at my PCs regional settings and set this as the default format. What is wrong here? I have reinstalled the application, but still have the same problem.
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Feb 15, 2011
I have an issue with calculating a total from my dataset. For some reason the number of plates produced on the StartDate is not being added to the TotalPlates in my program.Here is my query and calculation of total plates produced:
Dim Plates_Query As String = _
"SELECT *" & _
"FROM [PlateHistory_Query] WHERE (PlateDate) BETWEEN #Start# AND #End#"
[code]....
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May 3, 2010
Insert Query for inserting date into access from masked text box in vb.net
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May 8, 2012
I have a select statement which was returning the required values but when I changed the OS date from English(US) to English(UK), it now returns null. I believe the problem is concerned with date since in the query am selecting values where the date from the database is the same as the date in a combobox but I don't know what else I can do. It almost looks like the dates in the combox and in the database are not the same and yet the date in the combobox is actually retrieved from the database and has been returning values fine until I changed the system date format.Here's my select command:
cmd4.CommandText = _
"SELECT sum(brought_qtty), recieved_qtty from brought_coffee, centre_weigh where brought_date=#" & _
dtComb.Text.Trim & "#" & _[code].......
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Nov 15, 2009
I want to retrieve query from MS.Access database criteria is between some date range,but I get the following error when execute my reader:Syntax error in date in query expression 'D_ate BETWEEN # @DateFrom # AND # @DateTo #'.
Dim StrSQL As String
StrSQL = "Select * from Pla_Comp Where D_ate BETWEEN # @DateFrom # AND # @DateTo #"
myCommand = New OleDbCommand(strSQL, conn)
[code]....
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Jun 10, 2011
I am trying to bind an Access database to a MSChart control in VB Net 2008. I have a test database populated with four fields SAMPLE-DateTime, Values-Number, MAX-Number and MIN-Number. I'd like to only display the rows that fall within a specific date range but I'm running into a problem when i try to execute the following command:
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Feb 12, 2012
I am writing a small project which first reads all the access database's in a web directory and shows the database names in a combobox.
When the user select one of the names, the system connects to the database in question (still in the web directory), and shows the database contents.I have tried the following code:
Imports System.IO
Dim NetFiles As String = "http://www.myWebsite.com/db/"
Private Sub LoadAllLanguage()[code]....
Problem is I get an error from the LoadAllLanguage function: 'does not support URL formats'
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Mar 26, 2009
I'm trying to connect and query a .dbf dBase table. I'm fairly certain I've got the connection string formatted properly, because I am no longer receiving errors that I can't locate the table.I've tried everything I can think of, and nothing seems to work to make a valid query. I've tried all sorts of syntax changes around the table name (which is just 'buildings'...nothing fancy). The error is a syntax error with an incomplete query on the executereader line.
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Jun 29, 2009
I have the following code which will only return one column of 41.
vb.net
Using Command As New OleDb.OleDbCommand("SELECT * FROM Products_TAU WHERE ItemID= @ItemID", Connection)
Command.Parameters.AddWithValue("@ItemID", ItemID)
[Code]....
That table alone is filled with 76 records and has 41 columns of data to pull.. this is only returning the first column of the row indicated by the where clause.
Before I had the where clause call it by lineID which there is 4 records of that... and it was able to pull 4 columns from it...
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Mar 11, 2011
I am throwing some data out into Excel and am having some formatting troubles. I have 5 columns (date, time, a long number I don't want displayed in scientific notation - text is fine, text, text). I can get it all working with numberformat, however I have to do them different ways.
Date works this way cell.numberformat = "m/d/yy" and it formats it to say 3/1/11
Time works this way cell.numberformat = "h:mm AM/PM" and it formats it to say 8:07 AM
For the long number cell.numberformat = "@" and it doesn't change the format and it gets displayed in scientific notation
BUT if I use cell.style.numberformat = "@" it works as it should, but it messes up all of the date and time cells. Apparently when you use style.numberformat, it doesn't just apply to the cell you're working with. If I try using style.numberformat with the date and time formats, they don't change and are entered as if I didn't change the format at all.
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Jul 19, 2011
I'm trying the fetch only the date within the current and return how many rows Dim dc as new dataclassesdatacontext dim q=from p in dc.worktime where p.name.equals(session("name") and p.date ).count what I should I put after "p.date" ? And if I want to search for the record which there are record that are insert five days earlier, how to do that ? use (datetime.now - 5) ?
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Mar 5, 2008
You can query active directory with an OLEDB provider called ADSDSOOBJECT. This works great except it only returns the first 1000 rows. The following article shows how to work around this limitation in a vb script by setting the "page size" property of the command object. [URL]..I have been able to reproduce that code in VB.NET, but I am having problems getting it translated to OLEDB syntax, because there doesn't seem to be a "Page Size" property, or indeed a "properties" collection of any kind, in OLEDB.
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Feb 6, 2012
I have database with table called "Konzultacije" with field "Vrijeme" (Date/Time). I have datagridview (DGKonzultacije) with columns. Column (1) data format is set to date/time. I want to delete record from "Konzultacije" table depending on selected cell in datagridview but only I can get is error.
This is my code:
Dim iSql As String = "DELETE FROM Konzultacije WHERE Vrijeme = " & DGKonzultacije.CurrentRow.Cells(1).Value
conn.Open()
[CODE]...
If i add apostrophe like this:
Dim iSql As String = "DELETE FROM Konzultacije WHERE Vrijeme = '" & DGKonzultacije.CurrentRow.Cells(1).Value & "'"
error is raised: Data type mismatch in criteria expression.
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Mar 14, 2008
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?
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Apr 18, 2010
I 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]...
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Apr 28, 2010
I am connecting to an Access database and using a parameter query with the LIKE operator to return all rows that match query. The string to search for is taken from a Textbox
sql =
"Select * FROM Allview WHERE Info Like" &
"*" &
CStr(TextBox1.Text) &
"*"
The query does not return any data in vb, but when run from access with same string, there is data returned.The connection to the database is done correctly, as I am able to return data with various other queries.
Partial code :
Dim
con As
New OleDb.OleDbConnection[code]....
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Apr 7, 2012
I am trying to run a query an Access db from VB. The general query which I want to run is
SELECT * FROM Patient WHERE Patient.PatientID = ?
or SELECT * FROM Patient WHERE Patient.PatientLname = ?
I tried using an input box which captured the user input and pass that variable to the query, but that failed. Then I read about writing a function and using that, however, I keep getting an error which says Function not defined, but when stepping through the code, it seems to work. Here is my function: [Code]
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Jun 5, 2011
do you Create Database in MS Access Using Oledb in vb.net?
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Jun 6, 2011
Is it possible to drop an MS Access Database using Oledb in VB.Net?
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Jul 19, 2010
i 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.
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Oct 13, 2010
I 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.
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