When i add new row to dataset and i try to update the database i get the following error "System. Any idea how to correct this problem?. Attachments: Up to 10 attachments including images can be used with a maximum of 3. Here's a minimal bit of code to demo how to do it. In this case I'm assuming only 2 columns in your table.
I'm assuming you are clicking a button outside the grid to save the changes so you are forcing the DGV to finish edit.
Note that if you're using Access and you are putting the DB into the output directory of the project then ensure that each time you run the debugger you haven't configured it to overwrite the modified DB otherwise you will never see your changes. You would normally do this when you're setting the SelectCommand. The full docs can be found here. Note also that you should generally not open the connection to the DB when your form loads and keep it open. Network connectivity or a long running app can cause problems.
So you should really move your DB logic into a standalone type or at least functions that create the data adapter, open the connection, do the work and then close the connection.
This will make your app resilient to network and database issues. I have change my code but still not working. I am getting error "ExecuteNonQuery: Connection property has not been initialized". You're executing whatever command is represented by cmd , not the data adapter.
Assuming you have made your updates to the datable s in your dataset then you call the Update like you had in your original code. Maybe I confused you a little with the sample I posted but the data for the command is coming from the datatable, not your UI.
If that is the case then you don't really need the data adapter. Set your cmd variable to the insert command to execute and then it should work properly. Another thing that concerns me though is your original fill call. You are querying data from the ProductsDB table. But then you're trying to add a new primary key column to that table. That isn't going to work.
The table schema has already been retrieved from the DB. If the DB table has no primary key then you cannot add one like this. You shouldn't need to do much else. MsgBox "Id : Id is already exist. Please choose another one For help please consider the data by clicking on ""Show Data"" Button".
MsgBox "Record inserted successfully Show "Could Not Insert Record!!! EventArgs Handles Button3. MsgBox "Record deleted successfully Show "Could Not delete Record!!! EventArgs Handles FName. EventArgs Handles LName. EventArgs Handles Designation. EventArgs Handles Salary. EventArgs Handles Button2. MsgBox "Updated Successfully Private Function CheckId.
If IsNumeric Id. Return False. Return True. End Function. Private Function CheckSalary. If IsNumeric Salary. Private Function CheckFName. If FName. Private Function CheckLName. If LName. Private Function CheckDesignation. If Designation. Dim i As Integer. Dim ch As Char.
Chars i. EventArgs Handles Button4. Private Function IsIdExist. Dim Str, Str1 As String. Rows i "Id". End Class. Public Class Form2. Tables 0. In the last section , you learned how to move through the records in your DataSet, and how to display the records in Textboxes on your form.
In this lesson, we'll see how to add new records, how to delete them and how to Update a records. Before we start the coding for these new buttons, it's important to understand that the DataSet is disconnected from the database. What this means is that if you're adding a new record, you're not adding it to the database: you're adding it to the DataSet! After you have made all of your changes, you THEN commit these changes to the database.
You do this by issuing a separate command. But we'll see how it all works. You'll need to add a few more buttons to your form - five of them. Change the Name properties of the new Buttons to the following:. Your form might look something like this:. Now Item 1 Row 2 will contain the text "Jane". This won't, however, effect the database! The changes will just get made to the DataSet. To illustrate this, add the following code to your btnUpdate :.
Tables "AddressBook". Rows inc. Text ds. Run your programme, and click the Next Record button to move to the first record. Click inside the textboxes and change "John" to "Joan" and "Smith" to "Smithy". Without the quotes. Now click your Update Record button.
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