Adding Tables After Database Selected As DataSource
Dec 8, 2011
I know this is a very basic question but it has been awhile since I created a project with a database( been using a lot of XML). I created a database then selected it as a data source added some controls to some forms. Then I realized I needed to adjust some tables and I needed to add a whole new table. I deleted the controls and updated the tables that needed some adjustment. Now I would like another table. Can I disassociate the data source and do my adjustment to the database?
Have I created a problem with the binding object since I just deleted the controls on the form. I have written classes and some logic or else I might just start over. I guess I could copy those files but I am wondering if there is an easy way to fix what I have started. I realize that there are alot of questions here so any resource on how to modify a database that is attached to a VB.Net project.
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Apr 15, 2009
I am looking to select all the tables from a microsoft access database. I just need the SQL statement i think, i can connect to the database that is needed.
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Aug 18, 2009
I'm selecting a ListItem as I add it to a ListItemCollection. Then I use that ListItemCollection as a datasource for a DropDownlist but the Selected List Item is not being selected after databind.[code]...
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Jul 6, 2007
I'm selecting a ListItem as I add it to a ListItemCollection. Then I use that ListItemCollection as a datasource for a DropDownlist but the Selected List Item is not being selected after databind. Here is an example of the code:
[code]...
I'm trying to get this to work so I can return only a list of items, instead of a list of items and the selected value. Is there a way to make the DropDownList select the selected ListItem from the ListItemCollection (or any other type of collection)?
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Sep 12, 2011
I have a vb.net web application and when a particular function runs , i get data timeouts in the rest of the application..(ie..row not found errors or column does not belong to table but it does) The function is adding multiple rows in multiple tables in the database and is running in a for loop. It seems to be all SQL related but I am not seeing anything in the error logs in SQL or in the application Right now I am assuming it is memory related where to start note..the for loop will be replaced with a bulk insert but right now I jest need to resolve the issue of the timeouts
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Sep 25, 2011
When I update a record at table [Product] with the integer that stands for [Supplier Name] from joined table [Suppliers], this does not appear in my datagridview. Instead, I have to reload the table to dataset to make it visible. What about datarelation? Is it better that loading a joined table over the dataset? Note that I have never dealed with datarelations before.. How can I make a datagrid column to show "Supplier Name" instead of recordID that represents this supplier?
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Jul 25, 2012
I am using VS2008 and SQLite. I have created a database and several tables and am attempting to populate the tables with data from arrays.
The following code (example) works fine but stops after it inserts 30 to 50 records. I am running the VB code in debug mode and when it stops, I press pause to see where it is. It stops on "SQLcommand.ExecuteNonQuery()" and when I press continue (F5) it will insert another 30 to 50 records.
I do not get an error message. Is this a timeout issue? How do I keep the loop running to the end of the array?
Following is example code.
Dim
SQLconnect As New SQLite.SQLiteConnection()
Dim SQLcommand As SQLiteCommand
CODE:.....................
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Nov 23, 2010
I am using a combobox which is connected by data source with a table. On this table I do a Select distinct with some filters. Everything is fine except the fact that when I click on the combobox and dont select a value the app hangs until I select one value.Sometimes I have this error, sometimes no.I call the value by the sub load:
[code]...
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Feb 22, 2011
i have a remove button like i would like to delete just sigle selected row from both datagridview and the acutual database.the problem I am having is in deleting selected row.if i dont use the parameter the contents of the table gets deleted ,i dont have any primery key just an ID field (AutoNumber).
[code]...
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Jun 11, 2010
How do i delete a row from datagridview and datasource that is populated by a class file?dding of item goes like this, but not not sure how to delete the item.
Dim dt As DvdEzyDataSet.DVDCopyDataTable = DvdCopyDB.getDvdCopyByID(CInt(txtCopyID.Text))
Dim dr As DvdEzyDataSet.DVDCopyRow = dt.Rows(0)
Dim dt1 As DvdEzyDataSet.DVDDataTable = DvdDB.getDvdByID(CInt(dr.FK_dvdID))
[code].....
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Mar 1, 2012
Let me try to describe my problems in the simplest way: I have combobox1 and combobox2. I hope to achieve two things: Combox1 is bound to list1 (a list of string). When a user selects an item in list1, list2 (a list of string) will be obtained from database and combobox is bound to list2.If user specifies text1 in combobox1 and text2 in combobox2, then these two values will be shown in the comboboxes regardless of the bound lists.
[Code]...
So the results of above code is that goal 1 is achieved, but goal 2 is never achieved. combobox1.selected index is always 0 and combobox2.selected index is always 0 too.
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Jun 2, 2011
I have to add item "Final Grade" to my cboQuarter. The thing is, my cboQuarter already has a datasource and I can't add the item "Final Grade" during drop-down. The error says, "cannot modify or insert (can't remember word by word) when it already has a datasource."
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Mar 21, 2011
I'm working on VB .NET 2008.
Target: Bind dynamic datasource in a cell of a Windows.Forms.DataGridView depending on the selection in previous column. The grid must have 7 columns. If the selection on comboboxcolumn 2 or 4 is done, the datasource of comboboxcolumns 3 and 5 mus change using a query with previous selection as parameter.
In a first try to develop this functionality i've tried to use Telerik.WinControls.UI.RadGridView control. I've created a customized celltemplate with a combobox in order to have different datasource for each cell on the same column. All worked fine but seems to be some kind of bug in RadGridView, because when the combobox is presenting the list, after selection the list continued showing, doesn't dissapears as expected.
Ok, after several days of fight with RadGridView, I give up, and I tried to use same strategy but using Windows.Forms.DataGridView. I've created two classes one inherited from DataGridViewComboboxCell and other from ComboBoxColumn, in order to insert my own combbox or have the chance to have access directly to the combobox values. But the combobox showed is the default combobox not my own combobox.
how can I create a custom comboboxcell but using my own combo, and having access from outside to this combo?
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Mar 20, 2010
This is a winform and I'm using mysql as a database, here is my code:I'm trying to add data into multiple tables.[code]Index and length must refer to a location within the string. Parameter name: length
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Jul 23, 2011
I just posted a previous question about updating the connection string. It works fine, but it makes my select command fail. The SqlException was handled that Invalid column name 'Username', 'Password', 'UserType' which they are already in my User table from my database.Below is my select command:
myConnection = New SqlConnection("Server=RAVY-PCRAVY;Database=CIEDC;Trusted_Connection=True")
myConnection.Open()
[code].....
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May 11, 2011
I have multiple tables that I need to pull and display data from. I have created a new query in the TableAdapter of one table to pull data from related tables based on a parameter. In the Query Designer I can run my query and see all of the columns requested in my SELECT statement, however when I bind this table to a DataGridView and call the new query, it only returns the original columns from Table1.How do I see all of the columns I selected in my query?
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Mar 29, 2011
I have two databases. One is an SQL database and the other is an Access database.
In the Access database, I have a table with three columns EMPID, FIRSTNAME and LASTNAME.
I load this in my VB program to a table called "EMPID_Table"
In the SQL database, there is a table that has a lot of data that I need to retrieve based on the Employee#, which is the same as the EMPID from the Access database. In my VB program this is loaded into a table called "WagesTable"
How can I merge these tables, or add the columns FIRSTNAME and LASTNAME to the WagesTable
to the correct Employee# in my VB program? I cannot change the SQL database at all, I can only read from it.
Access Query:
Dim EMPID_Query As String = _
"SELECT *" & "FROM [EMPID_Table]"
'This returns EMPID, FIRSTNAME and LASTNAME
'I fill this to a table called "EMPID_Table"
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Aug 3, 2011
I am trying to make an application that will take the information entered into the program and generate a quote sheet using Microsoft word. Right now I am having trouble creating tables in the word document. The user can choose to quote between 1 to 4 different products. If 1 product is quoted, then it will create a 6x3 table. If 2 products are quoted, then it will create a 6x5 table with the 3rd column separating the 2 products. If 3 or 4 products are quoted then it will create another table under the first table and follow the same rules as the first table. The program works perfectly if I quote 3 or 4 products but when I try to quote 1 or 2 products then it results in an error.
Dim QuoteNumber As String
Dim RowsNeeded As Integer
QuoteNumber = NumberOfProducts.Text
[code]....
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Dec 11, 2010
A program that I'm designing for a local jewelry shop to print receipts and what not, there are multiple cashiers. I have written a database in Access with the Cashier ID, First Name, Last Name, PasswordI have added this to my dataset, it shows up as CashierDataSet1. What I need to do is verify the Cashier ID, and the Password match TextBox1, and 2. All the tutorials I have found are for accessing that database on the local hard drive, which would be fine if I could get rid of my UnauthorizedAccessException error. Any ideas or well known tutorials for using a database in a dataset without pulling the text boxes onto the form and creating that navigator ?
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Dec 15, 2009
When I try to add new datasource, the option 'database' isnt shown. Only Service, Object and Sharepoint is shown. This is done in VS 2010 Beta 2
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May 5, 2009
The first would be, how would I go about making each index in a list box an integer or decimal value? For example, If I wanted the 1st (or 0) index to = 300 and the next one (1) = 400. The next question that I have is that, if I had two or more list boxes with each index as a certain value as listed above, how would I go about adding up the total for each index that is selected?
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Mar 11, 2010
Dim MonPrice As Decimal
If RadioBtnMon20.Checked Then
TxBxPRICE.Text = TxBxPRICE.Text
MonPrice = MonPrice + 120
ListBox1.Items.Add(RadioBtnMon20.Text)
[Code] .....
I want to add only one price if selected but with this one if i choose another option then its keep adding price instead of removing previous price and put selected price..
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Aug 14, 2009
I am trying to make a database, fill it with tables and then fill the tables. I am having problems connecting to the server and am really not sure why. I have posted this thread in two areas of this site because I was not sure what was the best area to put it in. [code]
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Mar 23, 2012
My program needs to create a mailmerge with Word using a specific group of clients from the sql database list. I have a datatable set up in the database that stores the clients information on the individual user's computer.
The code below will automate word to create the mailmerge, but I can't figure out how to pull the following from my client table and use the results as a mailmerge datasource[code]...
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Jan 30, 2011
I use vb.net and windows form and sqlserver
I added Data Source(Microsoft SQL Server (SqlClient)) to my project. and now I need to change it to ODBC Data Source .
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Jul 13, 2010
I am developing a winforms application that will have an offline mode, so that it can access the data if an internet connection (or more accurately, a connection to my WCF service) cannot be established. I have decided to utilize SQL Server Compact edition on the client side of the application & was wondering what the general consensus is on the "best" practice for making the client application (Sql Server Compact) subscribe to the master database (MSSQL 2008).
Management enters information into a web based administration panel that I developed and is stored in a MSSQL 2008 database.After adding / modifying information, they can click a release "datapack" button which will increment a "datapack" version number, which will later be used by the client application to determine if they are in sync or not. When the client application is started, it connects to the internet and determines if the version numbers are in sync. If not, it pulls the information from the server.
That third step is where I'm a bit lost I thought about simply developing a web service that will expose a dataset containing all of the data and just iterating through it doing inserts, but that seems terribly inefficient to me. The full database probably wouldn't amount to much more than 5 MB total, so that led me to think it would be great if when management clicks the release datapack button, it would store the database in a file that could simply be downloaded and would replace the embedded database. Again, I'm a little lost on how that would work. This is my first time working with an embedded database, most of my work has been web/win apps that have real-time access to the data.
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Feb 15, 2012
So I have an application which uses MSSQL server as datasource. Is there anyways I can avoid using any database server and use a local file as datasource ?
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May 27, 2010
I normally place all db related work in my databases in SQL Server Express 2005. But in tutorials I have seen, I heard that one needs to re-create referential integrity and relationships and constraints and checks and defaults anew in datasources mapped onto databases. Is this true? What parts of a database are NOT mapped on to datasources?
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Nov 30, 2009
In the form below you see how the initial selected item is the first record of the table.. these controls are bound.. I want to initially show "Select one" in the combo box or nothing at all and the other controls not to be bound until an actual item is selected in the combobox..
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Aug 22, 2010
Ok, so I've got this Visual Studio 2008 Project I was working with about a year ago perhaps. And this project had a datagrid that was linked to an external database running on a server off the internet. Now, this databinding was all done using Visual Studio 2008's built in features. But how can I now change the binding to a different server, without destroying the project? I've noticed that a lot of the code that Visual Studio creates makes a mess. So manually trying to change the datasource has allways f*cked up the whole project for me.
I'm not all that good with this stuff, that's why I used the built in features of Visual Studio. But I noticed that several things appear, like a binding source, and a dataset. Is it possible to do this? Perhaps even better, making these settings be controlled after the program has been compiled. The way it is now, it's all hard coded after compiling, and that kinda sucks. I remember trying to do this about a year ago, trying to bind these settings to variables stored in settings. But I never got that to work. Just throwing around ideas here
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