GridListControl - GridRangeInfo Selected Range Not Refreshed

[Badri Rajani Kanth]

Hi,
We are using v3.2.1.0.
I am using a GridListControl, bound to a dataview. When we select an item(s) in list box, I am getting selected items using

GridRangeInfoList selectedList;
selectedList = lstbxSelected.Grid.Selections.GetSelectedRows(true, false);

foreach(GridRangeInfo range in selectedList)
{
for(int rowNo = range.Top-1; rowNo < range.Bottom; rowNo++) etc

and deleting the row from dataview. As the GridListControl is databound, item is delted from GridListControl also.

But again when I select some other item and call same method, range.Top and range.Bottom are not reflectd. Suppose if I was getting 5 earlier, now also I am getting same value 5. Even if the 5 item got already deleted. I think selected ranges are not refreshing properly.

Can you please tell me what to do? Shall I have to call any other method also?

Rgds
Rajani Kanth Badri

[Administrator]

Hi Badri,

Please refer to the forum thread for more details.
http://www.syncfusion.com/Support/Forums/message.aspx?MessageID=43222

Thanks for your interest in Syncfusion Products.
Best Regards,
Haneef

[Badri Rajani Kanth]

Hi,
I have checked the link, but I am not able to see the refesh happening in the sample application. When I add, i dont see items added and same is the case with delete.

We are using selection range and continuous data binding. And we may not assign and reassign the datasource. Can we not refresh the grid by other means?

Rgds
Rajani Kanth

[Badri Rajani Kanth]

Hi,

Without re-assigning the datasource, I am using the below code to delete rows and refresh grid list control. Can you plz inform me if any thing wrong with the used methods?

GridRangeInfoList selectedList = gridListControl.Grid.Selections.GetSelectedRows(true, false);

foreach(GridRangeInfo range in selectedList)
{
for(int rowNo = range.Top-1; rowNo < range.Bottom; rowNo++)
{
rowNo = (rowNo==-1)?0:rowNo;
DataRowView dataRowView = gridListControl.Items[rowNo] as DataRowView;
if(dataRowView != null)
{
CRMDirectory.ShortUBSPersonRow currentRow =dataRowView.Row as CRMDirectory.ShortUBSPersonRow;
deletedRowsList.Add(currentRow);
}
}//end of for-loop
} //end of foreach-loop

//clear and refresh grid
gridListControl.Grid.Selections.Clear();
gridListControl.Grid.Refresh();
gridListControl.Refresh();

foreach(CRMDirectory.ShortUBSPersonRow deletedItem in deletedRowsList)
{
mSelected.ShortUBSPerson.RemoveShortUBSPersonRow(deletedItem) ;
}

Rgds
Rajani Kanth

[Administrator]

Hi Rajani kanth,

You need to call the ResetVolatileData method for refresh the GridListContol after modifying the underlying datasource.ResetVolatileData() Resets the volatile data cache.Call this method if you wan to refresh the grid and force grid cells that are visible at the moment to reload all their data form data source.Also, thre row and column count will be required. Please try this code

GridRangeInfoList selectedList = gridListControl.Grid.Selections.GetSelectedRows(true, false);

foreach(GridRangeInfo range in selectedList)
{
for(int rowNo = range.Top-1; rowNo < range.Bottom; rowNo++)
{
rowNo = (rowNo==-1)?0:rowNo;
DataRowView dataRowView = gridListControl.Items[rowNo] as DataRowView;
if(dataRowView != null)
{
CRMDirectory.ShortUBSPersonRow currentRow =dataRowView.Row as CRMDirectory.ShortUBSPersonRow;
deletedRowsList.Add(currentRow);
}
}//end of for-loop
} //end of foreach-loop

foreach(CRMDirectory.ShortUBSPersonRow deletedItem in deletedRowsList)
{
mSelected.ShortUBSPerson.RemoveShortUBSPersonRow(deletedItem) ;
}

//clear and refresh grid
gridListControl.Grid.Selections.Clear();
gridListControl.Grid.ResetVolatileData();
gridListControl.Refresh();

Here is a sample.
http://www.syncfusion.com/Support/user/uploads/GridListTest_c29ab25.zip

Regards,
Haneef