To commit the change when the cell is clicked, you must handle the Data Grid View Commit Edit method and pass in the Commit value.
Using bind variables also improves query performance in the database, eliminates the need for special handling of literal quotation marks in the input, and protects against SQL injection attacks.
The following code shows a typical contains a client copy of the database data.
If you've got a typed Data Set then you use Table Adapters to retrieve and save data. Use a Table Adapter to retrieve the data and populate a Data Table. You bind your Data Table to a Binding Source and the Binding Source to your controls. Read the last paragraph of my previous post and then ask yourself if that's what your code is doing.
Database1Data Set1) End Using Catch ex As Exception Message Box. Message) End Try Catch ex As Exception Message Box. Message) End Try End Using The code works fine , it saves the data i`ve enterd in the textboxes , but in order to view the changes in the table i need to restart my application to see the changes. You've obviously got a typed Data Set so get rid of that Sql Command. You presumably already have step 1 in place, if not, you should be calling Fill on Me. Usually, step 2 involves the user entering data via the UI. As for the rest of the code, I don't think you've read what I posted carefully enough. " Videos: VB | C# VBForums Database Development FAQ My Code Bank Submissions: VB | C# My Blog: Data Among Multiple Forms (3 parts) Beginner Tutorials: VB | C# | SQLPrivate Sub btn Save_Click(By Val sender As System.
Thus i have my datagridview as student Id , student Name , Update student Id is the primary key and auto increments. But for Update the changes were not reflected in the tables, although the value in the dataset was changing.
The Data Grid View can display data in Bound mode, unbound mode and Virtual mode .
But I am facing a problem for update statements for this code. Update() is not working when i want to update contents of a row. Update(dataset, "Student") returns 0 ; Also I have tried populating student Id in the dataset along with the student Name yet the changes werent reflected.
I filled the data Grid View as select *,' Update' as [Update] from table_name ; I created a very small test table Student.
If you want to add the new row completely in code then that would look something like this: You can edit the data as much as you like, adding, modifying and deleting records, and only the local Data Table is affected, which is reflected via the bound controls. " Videos: VB | C# VBForums Database Development FAQ My Code Bank Submissions: VB | C# My Blog: Data Among Multiple Forms (3 parts) Beginner Tutorials: VB | C# | SQLPrivate Sub btn Save_Click(By Val sender As System.
You can also call End Edit on the Binding Source in code to commit the new row. Click '---------------------------------------------------------------------------- Using con As New Sql Connection("Data Source=.\SQLEXPRESS; Attach Db Filename=H:\Projects\Windows Application1\Windows Application1\Database1.mdf; Integrated Security=True; Connect Timeout=30; User Instance=True") Me. And after (if this will be solved) that i managed again with your blog (john) to copy form one table to another and now i need to change that code too because i can`t refresh / update it.
Bind variables are placeholders inside a SQL statement.