I tried dt_RowDeleted() , but does not work really well.
The row still "disappear" from datagrid, even it is in datatable.
Even I try to set data grid's DataSource back again or call
dataGrid.Refresh(), or sort the grid,
neither way helps.
The row is still "seems" deleted from the datagrid, I mean, not visible.
But when I click the datagrid "existing data area", the missing row come
back!!
So now I need somehow make a fake mouse click to simulate this action. I
haven't finger out how yet.
By the way, I find I ofter need do this kind of fake action in code. I
thought EndEdit() could help, but does not.
For example, I want something to happen when the user click on a cell. But
Mouse event is not always fired if the current cell hasn't changed, I need
change current cell to someother cell in my code to make mouse down event
always triggered.
Another example is, when I try to move a row up and down in a datagrid, it
does not work well if there is a cell is seleted(even this column is read
only), I need use code to select whole line so no CurrentCell selected.
Oh, there is another thing, to get data in a deleted datarow, I forget to
use DataRowVersion, so there was an exception. But this exception is not
"throw" in the event dt_RowDeleted( ), it is an slient exception!! Take me a
while to find out the mysterious behavior.
private void dt_RowDeleted(object sender, DataRowChangeEventArgs e)
{
int id= (int)e.Row["id", DataRowVersion.Original];
if(id >5)
{
e.Row.RejectChanges();
MessageBox.Show(this, "Can not delete!"); //this worked,
message showed
//this.dataGrid.DataSource = this.dt.DefaultView; //set
DataSource again, but does not help
//this.dataGrid.Refresh();
//does not help
//this.dt.DefaultView.Sort = "id ASC"; //does
not help
}
}
Thanks,
Ryan Liu
"Cor Ligthert [MVP]" <no************@planet.nl> дÈëÓʼþ
news:eu**************@TK2MSFTNGP09.phx.gbl...
In version 2005 this is organized direct in the datagridview
In version 2003 you have to do this using the dataview
http://msdn2.microsoft.com/en-us/lib...lowdelete.aspx
If you want to do this conditional, than you can try this one on our
website.
http://www.vb-tips.com/default.aspx?...9-57ec163eaa17
I hope this helps,
Cor
"Ryan Liu" <ad********@online.sh.cn> schreef in bericht
news:%2****************@TK2MSFTNGP09.phx.gbl...
Can someone give a sample to prevent a row from being deleted in a
datatable?
I tried e.Row.RejectChanges(); in dt_RowDeleting() but seems does not
work.
I need verify if there other data using data in this row before actually
remove it from datagrid.
I can certainly control with Delete button. But if I want to allow the
user
to use Del key on the keyboard, I lost this kind control.
Thanks,
Ryan Liu
