I have been having trouble finding a good way to do this. Basically what I need to do is take a query from a SQL Server Database and place it into a DataTable (or an array) for manipulation. I've got the connection and everything working, but none of the methods I've tried so far seem to work very well.I need it to compare data with an uploaded CSV file and post on a website.
View 1 RepliesSource: DataTable
Destination: Access Database Table
I should mention that the DataTable contains data resulted by an SQL SELECT query and it's not related to the "targeted" Access Database Table.
I wrote a procedure that builds a DataTable in memory using data stored on our DB2 database. The function builds a Multi-Level Bill of Materials (BoM), meaning that the data cannot simply be queried. The function works great and returns a nicely arranged DataTable object. However, I then need to query the in-memory DataTable against other tables on our server. What would be the best way to approach this problem? Should I make a DataTableAdapter for the Server tables and then build a DataView? I don't have too much experience yet with Data objects. (By the way, I looked into LINQ to DB2 and even installed IBM's addin's, but our server doesn't seem to support it at this time.)
View 6 RepliesI have an application that inserts data to a sql server db when it receives input. The problem is that i see many duplicate entries in the table. I have checked my code and it shouldn't do that:
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I have a combobox where the user can type the sql server name. Then a connect button that, when the user click, I want it to populate another combobox with all the databases from the server in the previous combobox. Unfortunately, I am getting the error object reference is not set....!
Here is where I am getting the error:
For Each objDB As Database In Me.SMOServer.Databases
I am new to VB ...I'm using vb2008 connecting to sql server 2005.
Here is my complete code:
Imports Microsoft.SqlServer.Management.Smo
Imports Microsoft.SqlServer.Management.Common
Public Class Form1
'Public Class frmSQLConnection
Private m_objServer As Server
[Code] .....
I have a vb.net form to add, modify or delete the product list..i have a datagridview in which i m loading data from sql server datatable...now i have a text box which accepts code for the product..i want that when i press a key, all data starting with that key should be highlighted in datagridview.....
eg
i have product codes
A001
A002
A003
C001
D001,, etc..
Now i press A in text box...in datagridview all data with A should be highlighted
I used this code:
Code:
Friend Sub PopulateCB(ByRef mycontrol As ComboBox, _
ByVal expressionSQL As String)
' DMBD is my data-handling class:
[code]...
Nevertheless, mycontrol remains empty after this.
I have a datagridview which is populated from a datatable. This works fine. But if i run it more then once i get a column name "example" already belongs to this datatable. Ive tried everything to clear all the columns of the datatable and the gridview but still the same
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I have one specific problem, that is relative to DataTable Updates to Database.
Code:
auxDatatable = Mydataset.MyDatatable.GetChanges
Now i'm going to Accept or Reject Changes based on some Criteria. The problem is that I wish to Update Only the Records that in Fact exist on the Database, as you can imagine I was forced to create some Dummy Records in Datatable, to a specific job.
My approach to this issue was to do something like this :
Code:
Private Sub MySub (ByVal auxDatatable As DataTable)
Dim drView As Mydataset.Mydatatable
For i As Integer = 0 To auxDatatable.Rows.Count - 1
[CODE]...
As you can see I tried to Delete the rows that are Dummys, but the rows in fact are not being deleted. As consequence I get an error after that Sub, when i try to make :
Code:
MyTableAdapter.Update(auxDatatable)
This is naturaly caused by the dummy Records.
I have an application where I would like to allow the user to change one field in a datatable but leave the other ones uneditable. I am using a datagridview to do this but I can only make the whole table editable or not. The result should be an order form where you have a determined product and should only be able to change the number of items.
View 2 RepliesI am trying to summarize a datatable based on a primary column and then add certain columns. For example this table
col-1 col-2 col-3
1 AA 2
2 BB
[Code].....
This simply doesn't do anything becuase it thinks the target table doesn't have a primary key.
There is a class in this datalayer that subclasses System.Data.Datatable. So for example if I populated a System.Data.Dataset and then tried to put the first table of this dataset into this class like so:
Code:
Dim dt as new myDatable
dt = ds.Tables(0)
[code]....
I am trying to search a datatable using a compound key. I can create the compound key just fine, but when I go to create an object to pass to the find it give me an error. Below is a sample of my code.
dim lblDT...etc...
Here is where I create the compound key, and it seems fine.
lblDT.PrimaryKey = New DataColumn() {
lblDT.Columns("serialno"), _
lblDT.Columns("type")}
This is where I am trying to create an object to pass to the .find
dim objSearch As New Object() {10643, 28}
It if would work this is how the find would be.
Dim row As DataRow = lblDT.Rows.Find(objSearch)
Probably a very dumb question but I have a program whereby I create and populate an in memory datatable, which I then add to a data-set. I then run a couple of updates on the dataset and need to know how to then send these updates down into the in memory datatable :Here is a mock up of the code structure following the creation and population of the table :
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I need help with this line of code: Me.avgsalespricetxt.Text = Me.dtsold.Compute("AVG(Convert([Selling Price]),'System.Int32'))")
Here is all the code i have so far, I need to Average a column in my datatable from what i have read "Compute method supports expressions and they support CONVERT function that you could use inside of the expression."
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I'm retooling an app, and condensing my queries down to one, but to do so, I would like to move the columns for better presentation. I am reporting on errors for particlular equipment, and the user may want to get equipment by errors or errors by equipment. Is there any way to change column order?
View 5 Replieshow to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,
Dim dt_report As DataTable
Dim dt_report_crypt As DataTable
Using cn As
[code].....
will SQL statements that work in Compact SQL Server also work in the Express Edition of SQL Server?
View 2 RepliesI have a vb.net program using the MS SQL 2005 Database.I use the SqlClient.SQLdataAdaptor to insert the records in DB.Whenever i load the program and then use the SqlClient.SQLdataAdaptor to insert record into DB for the 1st time, it will take longer time to load. But if I use the same SqlClient. SQLdataAdaptor to insert record into DB again immidately, it will take shorter time to load. However, if I wait for 5-10mins, then use the same SqlClient.SQLdataAdaptor to insert record into DB again, it will take longer time to load again.Can anyone tell me this loading is due to the SQL Server itself / the VB.net?Can anyone suggest me a way to check the reason of this loading? [code]
View 1 RepliesI'm new to VB, trying to learn how to connect to sql server. When running the code below I got this message from visual studio: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
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I have a website that currently uses a MS Access database, but I have been asked to change it to an SQL Server DB. I used the upsizing wizard and have changed the association in the web site from c3.mdb to c3.adp but I get the error "unrecognized database format. I tried using the .mdf file
Code:
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
' Fires when the application is started
[code].....
I started coding my first "real" stand-alone desktop application in VB 2008 Express. I was led into believing that using SQL Express Compact Edition was the thing to use for my database since it would reside on each PC (laptops) that I installed the program on. I created all my tables and about 6 forms and all was going well until I came to the point where I need to display a grid showing data from multiple tables using what i think is supposed to be a view. Now the problem is that CE doesnt allow views. Here are my questions:
1. Can I convert my CE database file into an SQL Server Express file?
2. Do I have to re-write all my forms that are using the database? I am planning on creating my SQL Server Express database with the same table names and the same field names, data types, etc.
I'm trying to write code to create a new database and then create tables within the database.
I'm running into a strange problem right now, which is the fact that I was able to create a new database ok on either the regular SQL Server instance, or the SQLEXPRESS instance. However, when I attempted to create a table, I got an error message saying that there is already a table of the same name.
When I tried to connect to the new database via SQL Server Management Studio, I could see the database. However, there are no tables in it! So, theoretically, I'm creating a brand new blank DB, so there should not be anything in this DB, right? and I should be able to create any tables I want in it!
Here is the code that I have so far:
[code...]
I just have one simple form with a button on it. The click event on this button calls the CreateAllDBs() routine.
I use Ms VB 2008 express edition with SQL server express. I want to know what is the reference to be added to make a connection the SQL express database?
View 1 RepliesI'm a newbie on the above title. I have read some documentations out there on the net but I feel I could learn more through a working sample.where I could set as a reference on developing or implementing sql server notification services in vb.net?
View 2 Repliesshow me the connectionString of Vb.net 2008 to Microsoft Sql server 2005?
View 1 RepliesI'm at an absolute loss here, I've read so many different things.I just want to add new records to a database I created using SQL Server 2008 with SQL statements in Visual Basic Express 2008. But I can't even connect/get it to recognise the database I created.The database name is 'database.mdf' and is situated in the MSSQL/DATA folder. So far I've read I need to use this code;
Code:
Conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=database.mdf"
Conn.Open()
[code]....
Connection between program and an remote SQL server. most of the hits were on VB6 and as you might see in the title I use VB.NET 2008, so let's begin:
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I'm confusing between SQL Server and MYSql and Sql Quries Is the SQL Server database like access and Sql Quries is the language Sql like Select * From Table1?
View 1 Replies