Updating A VFP DBF Via OleDb?
Aug 20, 2010
I've been using Visual FoxPro for the past 10 years, and am trying to learn VB.NET, (using VS 2008). I am in the process of re-writing a small VFP app in VB.NET, and am using the VFP DBF tables, (via OleDb). It is a real struggle for me to comprehend all the levels to keep track of and was wondering in anyone knows of some sample code that would point me in the right direction. After I complete this small app re-write, I have others to do that all require the VFP DBF table updates.
View 4 Replies
ADVERTISEMENT
Nov 6, 2009
I have an application to re-sequence some items based on a an alphabetical ordering of the items from another table. I couldn't create an update statement to update the database when I pulled the information by a join query, So I pulled down both tables into a dataset with an XML Schema description where the two are related by the itm_id key as in the database. I then have two datagrids one with the items and one with the bound to the relationship this allows only the records associated with the itm to be displayed in the datagrid, I then run a loop that changes to sequence number for each corresponding record,this all works fine but then I go to update the back end database.
The update from the dataadapter executes successfully, but then if I reload the dataset from the database back end I find that the update did not actually update the records on the back end. The only record that was updated was the very first record which updated with a 0 then all the others did not take, I have re-run it several times and they will not take.
Me.Cursor = cursors.WaitCursor
odbaCatItem.MissingSchemaAction = MissingSchemaAction.AddWithKey
odbaCatItem.SelectCommand = odbsCatItem
[code].....
View 5 Replies
Jan 10, 2010
I'm having trouble getting a datagridview to update into an access db.Here's the code, from what testing I have done it is telling me that there are no rows in the datagridview (datagridview1.rowcount returns 0) when I can visibly see that there are many rows:
[Code]...
View 5 Replies
Jul 4, 2009
Editting and Updating Access with OleDb commands. VB9
View 14 Replies
May 23, 2012
I'm writing a time entry program to record when an employee checks in and when they check out.I'm struggling on the part where I need to calculate a time span (time out / time in). I am selecting the In Time, Out Time, and Total columns.I want it to take the Out Time subtract it from the In Time and place that value in the Total column.I have so far and have tried several variations of different updates but have had no luck.[code]I keep getting a syntax error in the UPDATE statment.I'm not very fluent with OleDB yet and I'm not sure if I'm doing the update correctly.I have no problem with OleDB and single UPDATES or single field updates but when I am updating multiple rows with different values.
View 16 Replies
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?
View 2 Replies
Jan 25, 2012
I have a webpage with a form that is used to edit some object. This object contains a Collection of other objects defined like this: Public Overridable Property Employees As List(Of Employee)
On a form I can delete an employee, add a new one or modify existing one. When I click save new values are sent to the server. On a server I check if the user exists. If exists then I modify its values, if it does not exist then I add it. All employees that exist on the server and were not sent are marked as deleted (State changed to EntityState.Deleted). I try to use the following code (dbCollection = database entities, newCollection = collection sent from the form):
[Code]...
This code does not work, because changing to EntityState.Deleted removes the object from collection, and for each loop breaks, since the collection is modified...I know that I can overcome this problem by using a for loop or adding objects to delete to some other list first, but I hope maybe there is a pattern that would make my code nicer.
View 1 Replies
Feb 20, 2009
All I want to do is get a value from the database and display it via a message box.
I'm using Oracle 10 with VB 2005.
[Code]...
View 18 Replies
Jun 9, 2011
whenever i try to run my program i keep getting this one error:[IMG]http://i54.tinypic.com/2n8u815.png[/IMG]it works fine in college but on my laptop at home it doesnt seem to work :(does anyone know whats wrong with it and if theres a solution for it?
View 1 Replies
Jun 20, 2008
I created a database program when I used Windows XP and now I'm using Vista x64 When I try to run my program I get error message "Microsoft.ACE.OLEDB.12.0-providers not registerd on your computer. I have looked for solutions everywhere but the only thing I found was for Visual Studio.
View 12 Replies
Oct 19, 2010
Ive got my code, it add the data but not how i want it, when i add row i wnat it to go to row 1,2,3 and so on but its adding the data to say cell 5000, 5001 and so on. any way to get it go in at number 1 and 2 and what not. Now.month shows as a number how can i get it to reference it as a name so 10=Oct. and can i use it without referencing it into a textbox.
[Code]...
View 1 Replies
Dec 20, 2010
This is my first time inserting into a database using oledb and the with method. first there is a problem with my 'newrow' . iam getting an erro that says says object not set to an instance.Then there is my connection object.stuck.[code]
View 2 Replies
Apr 2, 2010
i wrote a module of a connection to DB with OleDB and the 'sub UpdateClients' doesn't work, the DB don't update.what's missing or wrong?this line -> "daClient.Update(dsClient, "CLUB_CLIENT")" -> dosen't work (sorry about my english, i'm not so good)the database doesn't update after this line (like i expected) what's missing in my code? i want that my DB will Update. "txtid" will be in "ClntId" from my tables.
Module mdlDB
Const CONNECTION_STRING As String = _
"provider= Microsoft.Jet.OleDB.4.0;Data Source=DbHalf.mdb;mode= Share Deny None"
[code]...
View 1 Replies
Oct 9, 2009
I can retrieve records from my Database fine, but I'm having trouble updating records. I am getting a syntax error on VB da.Update(ds, "Personnel")
View 5 Replies
Apr 19, 2010
I'm having a problem with accessing the OleDB in VB 2008. It comes up with this error: "Could not load file or assembly 'System.EnterpriseServices.Wrapper.dll' or one of its dependencies. The check of the module's hash failed." All my other projects used to work fine, now none of the projects work and it comes bumping when trying to connect through oledb.
View 5 Replies
Feb 3, 2012
When I am using an OleDBConnection to read a CSV, I notice something strange When the datasource (folder) of the CSV has a number in it, it will ALWAYS skip the header record, regardless of whether HDR=Yes or HDR=No
Dim conn As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + input_path + ";Extended Properties='text;IMEX=1;HDR=YES;FMT=Delimited;ImportMixedTypes=Text'")
Dim command As New OleDb.OleDbCommand("SELECT * FROM [" + input_csvFile + "]", conn)
Dim da As New OleDb.OleDbDataAdapter(command)
da.Fill(input).ToString()
View 4 Replies
May 17, 2012
I am having connection issue while connecting to using below string
provider=IBMDADB2;Data Source=XXXX.XXXXX.COM:5000;Database=C2RCU0;Uid=s858;Pwd=cccc
Getting error like database not found. But What i found was connection to mainframes it self was not happenning. Do i need to provide any other information or what i am missing here..
sConnection As String = "provider=IBMDADB2;Data Source=XXXX.XXXXX.COM:5000;Database=C2RCU0;Uid=s858;Pwd=cccc"
Dim sql As String = "SELECT COUNT(*) FROM DB2.TEXT_PHRASE WHERE FK_CD = '00078'
[Code].....
I am getting error and showing connection time out in details but exception what i am catching is database name not found
View 9 Replies
May 10, 2012
I've just published an application that I was working and now when I install and run it on another machine it gives me an error it says "The Microsoft.Ace.Oledb.12.0 provider is not registered on the local machine" How can I rectify this problem I've looked in refferences and the prerequisitues but its not there. what else can i do?
View 4 Replies
Feb 18, 2010
i am using visual studio 2008 for my final year project.i m making billing system.the system using micrososft access as a database.i used odbc as a connction with database.which one is better?odbc or oledb?
View 2 Replies
May 28, 2011
How to compare the result of the query..
for example i have a command "Select RemainTime from time where username = username"
how do i get the result of the query and compare it to a string[code]...
View 1 Replies
Sep 5, 2010
In the following fragment I want to set vID2 to NULL (and not to 0) if mID2 is an empty string. How do I do this? There is apparently no OleDbType.Null
cn.Open()
strTemp = "INSERT INTO tbShips (vNew_b, vID, vID2) VALUES(?, ?, ?)"
MyCommand.Connection = cn
MyCommand.CommandText = strTemp
With MyCommand.Parameters
[Code]...
View 2 Replies
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.
[code]...
View 2 Replies
Jun 9, 2011
Every time i try to run this codei get the following error: "'System.Data.DataRow.Protected Friend Sub New(builder As System.Data.DataRowBuilder)' is not accessible in this context because it is 'Protected Friend'.
"
This is my first time to insert using oledb and the With method.
CODE:
View 5 Replies
Dec 21, 2010
When i try to run this code it give me an error:"'System.Data.DataRow.Protected Friend Sub New(builder As System.Data.DataRowBuilder)' is not accessible in this context because it is 'Protected Friend'.
Imports System.Data.OleDb
Public Class frmAddd
Dim daReservation As New OleDbDataAdapter()
[Code]....
View 1 Replies
May 13, 2012
Basically I need to create a form that will display a summary of the population trend for each species of butterfly from a database that I have.I will do this by having the user select which butterfly species he/she wants to view from a combo box and then the list box will display the count_2010 and count_2011 information for that butterfly species.
I have managed to link my combo box to the database but I am unable to get any information to be shown in my list box. I can use a select case and input text myself but I don't want to do that as in another form records need to be added. Is it possible to have the relevant fields from the access database show up in the list box after the user selects a species from the combo box?
[Code]...
View 4 Replies
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]...
View 8 Replies
Oct 25, 2010
When I use Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:;Extended roperties=""text;HDR=No;FMT=Delimited'"""I get the values from the fields but if the data is decimal/double they are truncated to integers.
View 4 Replies
Feb 2, 2012
I have DataGridView which is 'binded' to dataset table. When I add new field to the table from access ,that field not appears in the datagrid. I am looking a way to refresh datagrid columns.I was try to delete datagridvew and add new datagridview with the same properties,but still last field(column) is missing. I was try to add new column manually, and I was set property name corresponding to the new field name. but data is not shown.
View 14 Replies
Jun 9, 2011
what's up when i call the function below i get an error that says that oledb is not registered on this machine
i am calling the function like this
ListBox1.Items.Add(getAllTableNames) Public Shared Function getAllTableNames() As String()
Dim con As OleDb.OleDbConnection
[Code].....
View 5 Replies
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
View 2 Replies
