I am using View as a Data Source to my DataGridView and I want the DataGridView to update automatically every X time with an updated View, and Its a problem because I am using View instead of SQL command.
As I've searched so far, I need to refresh the data source in the gridview to show updated data and it should be like that:
GridView.DataSource = null;
GridView.DataSource = ViewDataSource;
This does refresh the GridView, but with the same data.
the problem is that the view itself doesn't change, even thought I wrote:
ViewDataSource.EndEdit();
I am pretty sure its because I havn't start editing it and as I know the view was taken as the program started, so I am looking for a way to refresh my view (its my datagridview's data source) with the updated data so I can add it to the grid.
Thanks!
GridView.Refresh() and add Application.DoEvents() for it to refresh immediately.
Related
I want to create an application that is refreshing DataGridView content with data about surrounding Wifi networks on every second. I wonder what would be the best binding solution for this task. I think using BindingList is meaningless, because it would update the datagridview on every single update on the List, while it would be better to refresh it after whole List is updated. Meaby simple List and rebinding is appropriate here, what do you think?
You can prevent the DataGridView from updating on every change to your BindingList by the following
myBindingList.RaiseListChangedEvents = false;
// Update BindingList
myBindingList.RaiseListChangedEvents = true;
myBindingList.ResetBindings();
The ResetBindings() call will cause your DataGridView to be refreshed to reflect the changes to myBindingList.
So i am using RadGridView for Winforms.
Now what i want to do is to perform data manipulation in the radgridview and datasource to get updated after the row loses foucs. I don't want to use textboxes or any other control for entering data.
Something like this
And after i press the new add new row and enter data
Now this data isn't being updated in the dataSource to update i need a query that needs to executed against the datasource.
Now i haven't been able to build a query because i haven't been able to figure out how to access the data of the newly created cells so that i can build a query and pass to SQLCeDataAdapter for execution.
Any pointers will be appreciated.
Im not sure about RadGridView, but I use DataGridView, wich I guess works the same way
You need to get the datarow so u can update to the database
DataRow row = ((DataRowView)eTipoDocumentoBindingSource.Current).Row;
once you have it, you can use the DataTableAdapter method update(row) to save changes to the database
You can do that, either in the click event of a save button, or in the event of focused row changed
I have two windows forms. The first form shows list of records from sql. When you click some cell of a record in DataGridView it shows the second form. In the second form you can edit and update the record. I want DataGridView to be
updated automatically when user close second form. What should I do?
Are you using data bindings, or do you manually fill the grid ? With data bindings its very easy... if the data is contained in a DataTable and you change it somewhere, the change will be reflected automatically in the DataGridView. It also works with objects that implement INotifyPropertyChanged, and lists that implement IBindingList.
If you're not using bindings, you can :
locate the cell that contains the edited value, and update it manually, OR
refill the entire grid
Fill the grid with data from the database again?
I have problem with updating my datagridview after inserting new data to table. It seems DataSet ,to which datagrid is bound, does not refresh and i cant force it to do so.The only way to refresh dataset is to reset application. I know i can make new DataSet and fill it with table's data every button "Refresh" click ,but i wonder if its simpler way.
I googled a little, but non of these solutions work for me :
bindingSource1.EndEdit();
bindingSource1.ResetBindings(false);
dataGridView1.EndEdit();
dataGridView1.Refresh();
dataGridView1.Parent.Refresh();
dataSet1.GetChanges();
this.TableAdapter.Fill(this.dataSet1.Table1);
dataGridView1.Invalidate();
Where the problem lies?
Changes to the dataset will be reflected in any bound grids. But it sounds like what you're asking is how to make the DataSet itself update in response to changes in the underlying database table. There's nothing automatic in .NET or MSSQL for this. You basically have to just re-run your query. You want to have a look at the ClearBeforeFill property of the table adapter so that you are not blowing away existing data when loading in new changes.
Have a look at this article for more information.
I have a GridView who's DataSource is set to a DataTable. The DataTable is updated by some backend logic every few seconds, at which point a delegate is called to refresh GridView.
Currently I am simply resetting the DataSource, but that causes a problem - it interrupts any ongoing edits in the grid view and makes the selection 'jump' to the top-left cell.
The update logic basically creates a new (identical with regard to columns and rows) DataTable.
Is there any standard way to do it without any drawbacks? Is my only option updating the current DataSource row by row, inserting values programmatically?
Thanks!
You should use a BindingList or some data source that supports change notification.
I'm confused by many things in this question. If you're using a GridView, and not a DataGridView, then you're either using ASP.NET, WPF, or .NET 1.1. Which is it?
Next: you're creating a new DataTable entirely? Well of course the control's going to get reset when you reset the DataSource. It doesn't know that the schema of your new DataTable is the same as the one it's replacing. It's got to go through the columns and re-establish the bindings.
Also, of course it's losing the current row. The current row belongs to the old DataTable, not the new one.
If you want a bound control to retain its state when you update the underlying data source, update the underlying data source, don't replace it with a new one.
Do your updates happen on a background thread? I don't know if it will work in your scenario, but you could try this threaded binding list; see the example to see the worker merrily editing the grid.