I need to get information from two tables onto my form. I'm using a DataGrid called SQLGrid which I'm populating in code with the information I need to get out of both tables.
I need my application to be able to update the DataGrid, and commit those updates to the database. My problem is that all the research I've done so far has led me to believe that there's no way I can do this because the SqlDataAdapter.Update() method only updates 1 single table.I just had an idea to make my event handler execute a stored procedure that creates a view on the database, populates it with data from my dataset, and then distributes the information between the two tables where needed.I guess another solution would be to use 2 DataGrids and then tie each of them into a seperate DataAdapter/DataSet, and then update each when the Event is called. The problem here would be that it's more work for the end user to make changes, so I'd really prefer to do it another way.
I'm new to vb.net and its database methods so I'm a bit confused by these datasets and grids and table adapters.
I'm getting:Concurrency violation: the UpdateCommand affected 0 of the expected 1 records.
On this line:frmMain.AccountsTableAdapter.Update(frmMain.DsAccounts)
I have a datagridview attached to a dataset. I also have a button that the user can press to update information in the datagrid based on a website. But I often get that error when it comes to actually updating the table.
My application pulls data from a one column MS Access table. The column name is "Timer", and in Access the values are stored as text. In my application the DataTable stores the values as Timespan. Since the strings are of the format "01:22:15", there is no problem parsing the strings to Timespan when filling the DataTable When I am done working with the data, I want to update the Access DB, so I call dtAdapter.Adapter.Update(dt). This is when I run into trouble. As the application tries to update the database, I receive these errors:
"A system.InvalidCastException was thrown: Object must implement IConvertible""Failed to convert Parameter value from a Timespan to a String"
How do I instruct the TableAdapter to convert my Timespan values in the "Timer" column to strings before storing it in the database?
I have been on this for a week, with no luck, I keep getting the same error at the same place. IBasically, I join 3 tables together for reporting, I update one of the tables while reading thru, after I want the updates to stay.The error is something like "Update requires valid update command on Datarow".[code]
Private Sub Save_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Save.Click conn.Open() Dim cmd As New OleDbCommand("Update (SELECT Employee.empno, Employee.emplname, Employee.empfname, Employee.empmidname, Employee.contactno, Admin.description FROM Admin INNER JOIN Employee ON Admin.adminNo = Employee.adminNo) Set emplname=?, empfname=?, empmidname=?,
I dont know how to access the value from a Subtable "Produkt"
I have a datagridview wich uses the Datasource from the LINQ result from the picture. The columns from Maintable are displayed correctly. But for the Subtable "Produkt" i cant reach the Name Column value. if i Use "Produkt" in the DataPropertyName the Result is: {ContainerDB.tbl_Produkt} with Produkt.Name nothing is displayed.
I have a User interface in VB.net(for a desktop application). And i want the backend to be in Java. How to connect them . Example: I want to have the search box functionality to be wriiten in Java.
tbl_user_infouser_id(Primary Key) fname lname tbl_accountaccount_id(Primary Key) user_id(Foreign Key) username password NOW, i want this two tables to be displayed in the datagridview
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?
I am using VB 2005 professional and SQL Server 2005 express edition.
For the last two weeks I have been trying to have a datagridview control on a form that will have datasource from a dataset with two tables that are related. I want child the column to be a ComboBoxColumn where userts can select options and update the other data(from the other table).
I have two tables in an sql server 2005 database named computers:-
computers locations
Table computers looks like thisID is the primary key column) ID Location Computer139 Computer240
[Code].....
With the location column being a ComboBoxColumn so that when a user enters a new ID say Computer5,they have a choice of a dropdownmenu for the Location column. In the database table computers the item should be saved as well as the index value(to correspond to the LocationID).
Number1 = String.Concat(2, 106, 15, 233) Which will be 210615233.I am dealing with a problem in which I want to join some numbers then I come back again and split them up. The problem here I cannot save the original combination. Is there an Anti-concat method with saving the original combinations?For example, if I joined 3, 10, 4, 0 and 323 = 31040323. After some operations in my code I want to come back and split them up to the original combination of (3,10,4....etc). Please note that I am doing this not for one number, it is for many numbers.
I have common sub to save data from data table to database like this ad.Update(tb) It works fine, but problem comes when i populate Datagridview using a joined query which takes values from more than six tables, for example
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?
I'm having a hard time joining 2 datatables and have the joined datatable as result. First datatable (labels) holds data including a printerid. Second datatable (printers) holds printer references (id > unc). I would like to have as endresult (joined) a datatable with all data from the first datatable with the field (unc) of the second datatable. [Code]
have a datagridview containing 2 tables left joined, so that:table1 LEFT JOIN table 2 ON table1.id=table2.idI get an error whenever I try to edit my datagridview."invalidOperationException was unhandled by the user codeDynamic SQL generation is not supported against multiple base tables."The error points to this line:
da.FillSchema(dt, SchemaType.Mapped) da.Update(dt) << This line 'da = dataadapter
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.
im trying to fetch rows in 3 TABLES using JOined Queries.im tried the query first in MS ACCESS and it worked but when i tried to show it in Crystal report it wont show its data. [code]
I have to work in two parallel environments, developement and production, I want to use the same TableAdapter to connect to different databases (two Oracle databases running on different servers) with the very same structure. How is this possible?
I'm using TableAdapters in VB.NET (VS2008) to an SQLCE DB. These are associated with a range of DataTables in my DataSet.
I'm trying to simplify my app and I'm wondering : If I call the Update method of a table adapter and there have been no changes, then will the TableAdapter still open the underlying database, or is it smart enough not to bother?
At present I'm using simple boolean flags to keep track of which DataTables have modified data - and it works fine - but I'm just thinking I might be able to simplify my code just by always letting it call the updates. But I only want to do if it won't add an overhead.
I have a form that has a datagrid thats being filled by data from a temporary database (called Scratchpad3) and what I'm needing to do is to update another table that's not part being called with my table adapter. My table adapter looks as follows:
I have a VB windows Form project that connects to several DataTables in an Access DB. On my form I have several textboxes, comboboxes and datetimepickers that are bound to those sources. With one table in particular when I try to update the tableadapter after editing one of the textboxes the update method fails. No exceptions are thrown, but the update method returns a zero value and the data is not updated. The update will work when just the comboboxes or datetimepickers are edited, but as soon as a textbox is edited also, update will not work.
Other DataTables within the project are set up in the same manner but are not having update issues. I can't figure out what about this one particular table is causing an issue. Can anyone give me any thoughts on where or what to troubleshoot?
I have a DataGridView on my form and I'm wanting to override the 'Add New Record' button on the DataGridView controls, and display my own 'Add record' form. The problem is, when I do so, I no longer get the Auto-increment functionality of my primary key field (as i would If i used the default functionality of that particular button).
Would I be right in saying that when using tableadapters that you can't get the identity value back from the tableadapter when you insert a row intot a datatable then save the table back to database using tableadapter.update(datatable).It will only return the value of 1?
I would like to return the identity from the table but didn't want to have to assign all the parameters manually in code cause theres about 30
I would like to start a data base. Im using vb2005. I've started a new windows application. I have added a new data source to the project. Then I added a new TableAdapter in the dataSet.xsd part of the project. When I'm completeting the wizard, when I click on the QueryBuilder, when the add table window opens, the table already in the program ( that comes along with the TableAdapter ) isn't recognized. I've clicked on the refresh button but it still isn't recognized. (example: DataTable1 isn't recognized in the add table form in the query biulder of DataTable1TableAdapter)
I have code that saves changes to data on a form and it works fine. I then used the same code on a different form (only changing the name of the bindingsource and tableadapter), but changes I make to the data don't save. Why will it work on one form, yet not on another? Here is the code I am using to save the data on the form that works:
Dim deletedRecords As DataDataSet.CatalogDataTable = CType(DataDataSet.Catalog.GetChanges(Data.DataRowState.Deleted), DataDataSet.CatalogDataTable) Dim newRecords As DataDataSet.CatalogDataTable = CType(DataDataSet.Catalog.GetChanges(Data.DataRowState.Added),
[code]....
The only difference I see is that on the second form (the one that won't save) I have other tableadapters loaded. But they are just used to load data into different comboboxes. What could be causing the second form not to update the tableadapter? I'm not talking about running the application, making a change, then closing the application and it not saving. I realize that a second database is created because I've set the Copy to Output Directory property to Copy if Newer. I can tell it doesn't save because I run the application, open the form, make a change, close the form, then open the form again. The change I just made is gone.
I have a program that is using a dataset class, table adapter, binding source and binding navigator. The program can read, update, and delete rows from the table. However, it doesn't recognize new records and save them to the database when the table adapter's update method is called. (table was pre-populated by another process) The database table is using an identity column for the primary key. On a whim I added code to force an insert of data using the table adapter's Insert method with some hard coded values and this worked.This code was invoked after hitting new record on the binding navigator bar. Looking at the database, I notice the record I forced in skipped an identity value, which indicates to me hitting new record took the previous number. So the question I have is what would keep the tableadapter from inserting the new record when its update method is called?
Which does not match the query, either in name or order of parameter types.How can this happen? Any fixes? It also throws back errors at runtime for type mismatches, which don't occur when the parameters are in the 'correct order' in the query builder.
