I find this for you(text between " **** start *** and **** end ***").
It will answer both of your question:
1. "But, How can I send focused on a row?"
Right after sort, focus will be back to current row.
2. "Also, another question is how can I identify the action "Sorting" on the
Data after I click on the Header of datagrid?"
Mouse down event in code below, contains answer to your question. It shows
how to detect click on column header. Any click to column header with
property AllowSorting = true, is "sort action".
Best wishes,
P.
**** start ***
Re-Selecting The Currently Selected Row After A DataGrid Sort
This is a follow-up to this previous post about sorting a DataGrid. It turns
out that the person who originally asked the question about knowing when the
sort would occur, wanted to know this for the purpose of re-selecting the
currently selected row after the sort. Well, as it turns out this is
entirely possible, but it requires some deeper digging into the data-binding
aspects of WinForms (which I love btw).
So here's what you'll need to do. First things first, you're going to need
to watch for the sort to happen as was detailed in the previous post. Upon
detecting the sort about to happen you must record a key value for the
currently selected row in a state field (probably in your Form). Now, here's
where the deeper knowledge of data-binding comes into play. You must also
attach an event listener to the ItemChanged event of the CurrencyManager for
the DataTable/DataView you've bound your DataGrid to. The ItemChanged event
will fire after the sort takes place at which point you use the DataView's
(DataTable:
efaultView if you're bound directly to a DataTable) Find method
to locate the row in the view by the key value that you stored in your state
field in the sort detection event logic. Once you've found the new position
of the row in the DataView after the sort, you set the CurrencyManager's
Position property to that index.
Ok, this might sound complex, but lemme show you just how easy it is with
some code. For the purposes of keeping this code concise, assume this code
is in a Form subclass which contains a DataGrid in a member variable called
"myDataGrid". This DataGrid is then bound to a DataTable, stored in a member
variable called "myDataTable" which has a key column named "key" of type
int:
public class MyForm : Form
{
private int currentlySelectedRowId = -1;
public MyForm()
{
this.InitializeComponent();
// Get the CurrencyManager for the bound DataTable
CurrencyManager dataTableCurrencyManager =
(CurrencyManager)this.myDataGrid.BindingContext[this.myDataTable];
// Hook up to the ItemChanged event
dataTableCurrencyManager.ItemChanged += new
ItemChangeEventHandler(this.myDataTableCurrencyManager_ItemChanged);
}
private void myDataGrid_MouseUp(object sender, MouseEventArgs args)
{
DataGrid.HitTestInfo hitTestInfo = this.myDataGrid.HitTest(args.X,
args.Y);
if(hitTestInfo.Type == DataGrid.HitTestType.ColumnHeader)
{
// Get the CurrencyManager for the bound DataTable
CurrencyManager dataTableCurrencyManager =
(CurrencyManager)this.myDataGrid.BindingContext[this.myDataTable];
// Get the current DataRowView
DataRowView currentRowView =
(DataRowView)dataTableCurrencyManager.Current;
// Remember the currently selected row ID
this.currentlySelectedRowId = (int)currentRowView["key"];
}
}
private void myDataTableCurrencyManager_ItemChanged(object sender,
ItemChangeEventArgs args)
{
// Only execute this logic if we're in the state of sorting
if(this.currentlySelectedRowId != -1)
{
// Find the new position of the row now that it's been sorted
int newPosition =
this.myDataTable.DefaultView.Find(this.currentSelectedRowId);
// Get the CurrencyManager for the bound DataTable
CurrencyManager dataTableCurrencyManager =
(CurrencyManager)this.myDataGrid.BindingContext[this.myDataTable];
// Change the position of the currency manager
dataTableCurrencyManager.Position = newPosition;
// Reset sorting state
this.currentSelectedRowId = -1;
}
}
}
**** end ***
(source:
http://216.239.59.104/search?q=cach...2003/01/22/646.aspx+datagrid+after+sort&hl=sl)
