Dim dbCMD As New OleDb.OleDbCommand With {.Connection = dbConn, .CommandText = _
<SQL>
SELECT *
FROM (tblServices
7INNER JOIN tblAgents AS Agent1 ON tblServices.SentByID = Agent1.AgentID)
[code]....
I understand the error, Agent1 doesn't exist for the name.
I'm trying to figure out how to use Group Joins in LINQ queries under VB.net. For some reason, every example I seem to find on the syntax is just plain At least, that's what my compiler keeps telling me. This is a simple example where I want to join orders to their order items so that I end up with a type that contains a collection of order items grouped together by their orderId's:
Dim groupedOrders = (From o In orders
Group Join i In orderItems On o.OrderId Equals a.OrderId Into myOrders
Select o.OrderId, myOrders).ToList()
What I'm currently running into in this example is that the 'myOrders' group I'm creating errors out with: Definition of method 'myOrders' is not accessible in this context.
I'm using LINQ to compare two DataSets with each other to create new rows and update existing. I've noticed that the complete comparison lasts ~1,5 hours and only one of the two cores is busy(Task-Manager is 50-52% CPU Usage). I assume that it could increase performance significantly.
how and what should I parallelize?
These are the original queries(reduced to the essentials):
'check for new data
Dim srcUnique = From row In src.Email_Total
Select Ticket_ID = row.ticket_id, Interaction = row.interaction, ModifiedAt = row.modified_time
[Code].....
I am trying to do multiple joins within a single query in SQL Server CE. I know that SQL Server CE doesn't support multiple SELECTs but I can't find any information on multiple INNER JOINs. I keep getting token errors on ProjectItemMaster (after the FROM) and the first INNER JOIN. Warning this is a big ugly query used to generate reports.
[Code]...
If I can't uses multiple INNER JOINs I can I break the query down into a number of different queries but I would prefer not to. So it is easier to maintain a SQL Server CE and an SQL Server version of the program.
We use an ERP program in conjuction with SQL server and lots of tables that keep track of product records customers and all these kinds of stuff. I am building a fairly simple Warehouse Inventory Application that warehouse employees will use to count and inventory stock on hand from products around the warehouse and then check if any quantity errors occur between stock on hand and logistic quantities.I have created a custom Inventory table that I would populate with records like {stock_code, Description, Quantity_remain, quantity_avail}. Those records already exist in 2 different tables in my database. The aim is that I want my program to fetch daily 10 random codes from the stck table, and records about their quantities,bringing together the "columns" that my new custom table has +2 more editable columns: inventory, date, user with a query like this:[code]
As you can imagine my custom table contains the exact same fields as the query suggests + 3 more.I use the the stck table to fetch product info like its code,description, its group_code, categ_code, and then I outer join the stck_x_th that contains records concerning quantities remaining or available asociated with each product code and the "places" those quantities reside in the warehouse.Then, store them in a datagridview control, with only one editable column -inventory- (user and date columns are auto-populated with default values), and then when the user fills out the inventory quantites, I want to save the datagrid "as it is" in my new custom table.I am creating a databound gridview control using one table adapter (which refers to the inventory table). Then I add to my table adapter using "add query" the forementioned query with a fillby method to populate the Datagrid (and therefore my Table in SQL) with the exact same values my query returned from the different tables. But whenever I try to update the table concurrency exceptions raise.It works like a charm if I enter the values in the grid cells manually, without populating the grid control with the new fillby method my self but not if I populate the grid via a query and then hit update.
Can anyone help me by translating this SQL Statement to Linq? [code]
View 1 RepliesI coded a program to access a Microsoft Access 2010 database. The program is written using Microsoft Visual Studio 2010. I get the error message that the database I'm trying to access is in an invalid format. look at the code below to see what I missed. The error is in the datasource statement.
[Code]...
quite new to database queries through VB. I have just created a DB using MS Access and I need to write data to it from my VB Application.Can anyone point me on which objects should I use to execute these write transactions?
View 6 Repliesit's just for a program registration. i would store all of the registration codes in the access database, then export it to XML, then upload it to my web host. I would then somehow connect it to my Visual Basics login form (Which I have already made). If this can't be done, having them register through the form and having all the allowed codes on the internet (So i can easily edit them)!
View 5 RepliesI've built my program a database in Access 2010. Works very nice. But I've had a thought. When my program is compiled and I give it out to users. Will those users need a copy of Microsoft Access to use my program. If so, How could I make it so that no install of Access is needed.
View 3 RepliesSyntax error (missing operator) in query expression '''system time'''.this is the error that appears
this is my code:
Dim sqlCmd As String
Dim x As Date
x = Format(Now(), "General Date")
[code].....
the fields in the tables are all text fields.is there any way to fix this error? perhaps it is in my query but i really cant find a solution.is there an alternative to get what i want my program to do?it is basically entering an ID number and finding the record with the same idnumber and putting the system time on the timein field for that record.
I programmed an app with an Access 2010 database, I installed the app and the database on a computer with office 2007. The app can't open the database. Do I need to copy some extra file on the user's PC?
View 15 Repliesupgrade my DAO code to ADO? The following code worked fine in VB.Net for Interop Access 2007.
View 1 RepliesI am using Access 2010 and VB in VS2010.I have created a DB and have several tables. 1 table in particular called Employers, has the normal AutoNumber Primary key. Everything in Access runs fine. I used Access to develop a basic model application of the full version I am developing in VS.My VB front end contains a dataset linked to the employers table. I have dragged onto my form the "detail" view of this DataSet, not the DataGridView. The usual controls are in place such as the EmployerBindingSource, EmployerTableAdapter, TableAdapterManager and a EmployerBindingSourceBindingNavigator.On my VB form Scrolling through the record set is fine and all works well.My problem is after I click the "Add" record button on the EmployerBindingSourceBindingNavigator. The form fields go blank as expected awaiting user input. However, the field that is bound to the employer_id field (the Employer table's primary key) shows a value of -1.The insert command works no problem, and having looked at the database the table contains the new record with a correctly incremented PK
[Code]...
Where is httpUtility.UrlEncode in 2010?? From what I read in the forum I need to add a ref to System.Web. But I only see references to System.Web.Application.Services and System.Web.Services, which don't resolve the problem.
View 1 RepliesI'm trying to create an application using VB 2010 and an MS Access 2007 database. I've been googling around but was unable to find something focused on this matter.
View 3 RepliesIn my application, users can establish connections to one or more databases in order to pull in data, thus a read-only connection is sufficient. I use the following connection string syntax when connecting to an Excel 2010 database:
[Code]...
I've been working on an app for quite awhile and now am at the point where I have to incorporate an Access DB. Tried many things/variations of what I've found...but now am stuck. So here goes:
I have a Form with this
Public Class Form1
Dim objConnection As New OleDbConnection _
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Test.mdb")
[Code].....
I am trying to import data from an access database to a access database that my project uses I am having problems with combo box fields in the database with the data. I want to import what is displayed instead of the numerical key value. Example: The combo box displays employee names but the value stored is the key value from the employee table so instead of importing John Doe it imports 2 is there a way to make the actual name instead of the number?
View 4 RepliesI reproduced the following code to update a database and I get the error" Operation must use a updateable query"
[Code]...
I was trying to establish a database connection to MS Access but this error keep occurring.
The 'Microsoft.Jet.OLEDB.12.0' provider is not registered on the local machine. I have forcefully set my cpu to x86 but still no lock below is the code how I open it.
Imports System
Imports System.Data
Imports System.Data.OleDb
[Code].....
This is not working like normal WForm application? In any WForm application I add new data source and when I insert some table on some form everything is done automatically and application is working.But I have a feeling that in MDI application this is not the case First I get some errors that dataset is not defined
Me.VideotekaDataSet = New videoteka.videotekaDataSet()
(videoteka is name of app and parent form - this error is in child form)...
When I remove this first part "videoteka." then app is working but data is not saved...
So, why is my connection wrong? Is this working on some other way in MDI applications?!
I'm having some troubles getting some information from access database?Is there any good tutorial to learn working with Access DB?Beside that, I'm making an app that have a login function.The login have username, password and function.I made this query to get the function:
Code:
SELECT COUNT(*) AS LoginQuery2, username AS usernamequery, [password] AS passwordquery, func AS funcget
FROM Registo
GROUP BY username, [password], func
HAVING (COUNT(*) = 1) AND (username = ?) AND ([password] = ?)
Then using the tableadapter after the build, I used the function I made.
Code:
Dim login = Me.RegistoTableAdapter1.ScalarQuery(usernametxt.Text, passtxt.Text)
Depending on the function of the user, it will show a different form ( Admin, User, Client )How can I get the info from that query to get the function field information?
i need to import text file into access database.i`m using oledb.i didnt find anything on the web...
View 2 RepliesI need some further help regarding this thread [URL]..I use this Query
SELECT Kunder.anstnr, Kunder.FirstName, Kunder.LastName, GetJoinNames([Bestn.Anstnr]) AS Weeks, Bestn.Manad
FROM Kunder INNER JOIN Bestn ON Kunder.anstnr = Bestn.Anstnr GROUP BY Kunder.anstnr, Kunder.FirstName, Kunder.LastName, GetJoinNames([Bestn.Anstnr]) And this function in access and it works quite well
[Code]...
I'm working on a project right now that I've had my head wrapped around for about the last week or so. Without getting fully into it, it's a 2 part application. DoIT and DoER. DoIT creates commands that another computer, running DoER, is supposed to do.
[Code]...
I have vb form with 5 DGV to show data on where matched condition on date parameter. Now I want the application to export the filtered rows from every 5 datagridviews to a single mdb file but in different table for each DGV.This should create and insert the rows in the mdb tables files and get it saved at the user defined location.
View 31 Repliesi need to write query into textbox but i get error message"Syntax error in DELETE statement."
'Define the connectors
Dim oConn As System.Data.OleDb.OleDbConnection
Dim oComm As OleDbCommand
[code].....
This is the code for my 'validation' form, which reads stored numbers in an access database and compares them against generated lottery numbers to check for winners. It assigns divisions and prizes to each gameID from the table in the database and is supposed to write this information back to the database. However, I get an error on the very last line of code where I tell the data adapter to update the table in the database with the dataset. The actual error it gives me is "InvalidOperationException was unhandled". Here is my code (ask me questions for any clarification):
[Code]...
the problem is my sql statement returns no data even tho the record IS IN the access database. Below is my
If RB1.Checked = True Then
comm = New OleDbCommand("SELECT * FROM Recipes WHERE (RecipeNo = '" & TB1.Text & "')", con)
End If
If RB2.Checked = True Then
[code].....