How to apply multiple changes at one time for a WinGrid?

175

xiong posted over 16 years ago

Hi, everyone,

Now I use a WinGrid to display data, the data is stored in a DataTable, and I register the

ultraDataSource1.CellDataRequested event, when this event is fired, I get data from the

DataTable, like below:

void ultraDataSource1_CellDataRequested(object sender, Infragistics.Win.UltraWinDataSource.CellDataRequestedEventArgs e)

{if (e.Row.Band.Key == "RootBand" && e.Row.Index < _datatable.Rows.Count)

{switch (e.Column.Key){case "Column1":

e.Data = _datatable.Rows[e.Row.Index][0];

break;}

}

now my question is: the user may make multiple changes from the UI(the WinGrid), and he/she wants to apply the changes

at one time, and there is a indicator to indicate that some changes have been made, but the user

has not applied it yet, anyone knows how to achieve this? Any help would be appreciated.

Thanks in advance.

85

Carlos posted over 14 years ago in reply to xiong

Was there a resolution to this
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175

xiong posted over 15 years ago in reply to Mike Saltzman

Mike,

thank you, I have done that.
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Offline Mike Saltzman posted over 15 years ago in reply to xiong

That sounds like it might be a bug to me. You should Submit an incident to Infragistics Developer Support
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175

xiong posted over 15 years ago in reply to Mike Saltzman

Hi, Mike,

Thank you!

Now I know the UltraDataSource can't do it for me, so I revert a cell's value by reading its original value from

the latest saved datasource, and it works for me.

By the way, I encounter with a Exception when I set:

this.ultraGrid1.DisplayLayout.Override.AllowMultiCellOperations = AllowMultiCellOperation.All;

this.ultraGrid1.DisplayLayout.Override.CellClickAction = CellClickAction.CellSelect;

to do cut/copy/paste, here is a column's type is double(Currency), and I set its format to "C" and so forth, for example,

at last, a number 1000000.69 will display as $1,000,000.69, if I copy this cell to another cell in the same column,

an error said "can't convert $1,000,000.69 to double". If I don't use this format, it works, but how can I do this with

using this format?

Thanks
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Offline Mike Saltzman posted over 16 years ago in reply to xiong

I'm afraid you lost me.
Why are you setting the UpdateMode on OnUpdate? This setting actually does not work, because the BindingManager implicitly calls an update when it changes it's Current position.
And why are you cancelling BeforeRowUpdate?
And why are you calling UpdateData when the user clicks the Discard Changes button? That seems to be backwards.
A DataTable is specifically designer to be used with a database. So it has all kinds of functionality to deal with keeping track of which rows have changed so that it can cancel the changes or update the back end. UltraDataSource is designed to be a much simpler and fast data source and it has no such functionality. So if you want to be able to discard all changes made to all rows in the grid, you will have to implement some way to store the original values and do this yourself - the UltraDataSource cannot do this for you.
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