HI,
I have a datagrid (from wpf toolkit) which is binded to an observable collection . There are two buttons "Up" and "Down" which moves the selected row accordingly.
For eg: If there are 10 items in the datagrid and if I select the 4th item and press "Up" arrow ,then the 4th item will be moved to 3rd item and previous 3rd item will be 4th item. ie swapping with previous item. Similarly "Down" arrow the other way.
private void BtnUpArrowClick(object sender, RoutedEventArgs e)
{
try
{
btnDownArrow.IsEnabled = true;
currentRow = grdSeqData.SelectedIndex;
if (currentRow == 0)
{
btnUpArrow.IsEnabled = false;
}
else
{
upRow = currentRow - 1;
if (upRow >= 0)
{
sequenceDataList.Move(currentRow, upRow);
currentRow = upRow;
}
else
{
btnUpArrow.IsEnabled = false;
}
}
}
catch (Exception ex)
{
CatchExeption(LanguageHandler.GetCurrentCultureText("EventUpArrow_Exception"), ex);
}
}
The above code work fine when the datagrid is not sorted. When i sort the datagrid via header click, and then do the "Up" or "Down" operation nothing is reflected in the datagrid.
The view is getting sorted where as my binded collection remains the same. So i tried to move the collection from view but in vain.
ICollectionView view = CollectionViewSource.GetDefaultView(grdSeqData.ItemsSource) as ListCollectionView;
view.MoveCurrentToNext();
I think when the datagrid sortdescription is applied, then the view will not move accordingly. Please help.
Related
Is it possible to override the response to a touch interaction for a control in UWP? For example, for a DataGrid XAML control, the default behavior when a row is tapped is to select this row and deselect all other selected rows. Can this be changed to have the tapped row added to the selection as if the control key was pressed?
EDIT: My solution is for Surface Pro in tablet mode so the user would only interact with the app via touch. So I wanted him to be able to select multiple items using touch only. In the image I added, the default behavior if the user clicks on "Chicken Sandwich" is to deselect "Burger" and select "Chicken Sandwich" unless the CTRL key is held down. However using the CTRL key on Surface device without mouse and keyboard would mean that we will need to have the on-screen keyboard on display which would be a bit cumbersome. I would like instead to change the default behavior where if the user clicks on an unselected item it's added to the selection, and if he clicks on a selected item the item it gets removed from selection (in the example below, "Chicken Sandwich" will be added to the selection on first touch and removed from selection on second tap), so basically same functionality as holding the CTRL key down but without using it.
Based on the document, the DataGrid class provides the behavior that selecting multiple items while holding down the SHIFT or CTRL keys during selection. What you need to do is just to set the SelectionMode property as Extended.
Update:
Please check the following code as a sample:
List<object> selectedItems = new List<object>();
bool flag = false;
private void dataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if(flag==false)
{
var item = dataGrid.SelectedItem;
if (selectedItems.Contains(item))
{
selectedItems.Remove(item);
}
else
{
selectedItems.Add(item);
}
flag = true;
dataGrid.SelectedItems.Clear();
foreach(var cur in selectedItems)
{
flag = true;
dataGrid.SelectedItems.Add(cur);
}
}
else
{
flag = false;
}
}
I have a gridview which is binded to the datasource.In that gridview i have one column of checkboxes.I want to delete the rows of gridview by checking the checkbox of particular rows,Finally i have delete button outside the gridview which deletes the checked rows from the gridview.
problem is even though am checking checkboxes of rows..but it's showing checked=false...so none of the rows am able t delete..i tried all the possibilities but its not working
Please give me solution ASAP
this is my code
foreach (GridViewRow row in GridView1.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox chkDelete = (CheckBox)row.Cells[5].FindControl("chkDelete");
if (chkDelete != null)
{
if (chkDelete.Checked)//It Showing checked=false
{
//delete code goes here//
Check you page load event, grid view may be rebinding again on each Postbacks. If you found such scenario, make following changes in your code.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//logic on page load
}
}
I am able to build custom rows with celltablebuilder. When clicking on a particular anchor cell, I am able to build additional subrows for that row. This subrow has buttons, when clicking on the button I have do some action. I am able to add buttons with clickhandler in the subrow, but when clicking on the button nothing is happening clickhandler is not firing.
Can anybody please help.
protected void buildRowImpl(GridDTO rowValue, int absRowIndex ) {
buildRows(rowValue, absRowIndex, true);
if (showingFriends.contains(rowValue.getComponentId())) {
buildAdditonalRows( absRowIndex, gridDTO);
}
}
private void buildAdditonalRows(int index, GridDTO rowValue, ){
TableRowBuilder row = startRow();
td = row.startTD();
if(rowValue.getXpath() != null){
//td.text(rowValue.getXpath());
renderCell(td, createContext(1), cellTable.getColumn(1), rowValue);
}else{
td.text("");
}
td.endTD();
td = row.startTD();
Button button = new Button ();
button.setText("Save");
button.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
Window.alert("ssss");
}
});
DivBuilder div = td.startDiv();
div.html(new afeHtmlBuilder().appendHtmlConstant(button.toString()).toSafeHtml());
div.end();
td.endTD();
row.endTR();
}
CellPreviewEvent provides subindex. You can use it to get subrow value.
Example usage :
dataGrid.addCellPreviewHandler(new CellPreviewEvent.Handler<TreeItem>() {
#Override
public void onCellPreview(final CellPreviewEvent<TreeItem> event) {
if(event.getNativeEvent().getType().equals(BrowserEvents.CLICK)){
if(event.getContext().getSubIndex()>0){
event.getValue().getChild(event.getContext().getSubIndex()-1);
}
}
}
});
Or you can provide custom CellPreviewEvent.Handler implementation with selectionMode. For more details you can look at AbstractHasData
I had a similar situation where i needed a widget inside a cell to listen for click events... What i found out is that the widget doesn't respond to events once you inserted it into a cell (In other words, only the actual HTML that makes up for the widget gets put into the cell, any kind of event handling isn't included). The work around is to add the events to the Cell (You can make a custom cell class for that particular cell-widget and override OnBrowserEvent to listen for events.)
See GWT: On adding custom widget to celltable losing events of the custom widgets for a more eloquent explanation and example code.
I have a DataGridView with a checkbox column. I want to capture the value of the checkbox immediately when user changes it by clicking. I tried several events (CellValueChanged, CellClicked, CurrentCellDirtyStateChanged etc.) but nothing worked.
This is my code:
If dgvIDsTBC.CurrentRow.Cells(2).Value = True Then
MsgBox("True")
End If
Please help
Hope this helps
void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 3)
MessageBox.Show(dataGridView1[e.ColumnIndex, e.RowIndex].FormattedValue.ToString());
}
This i presume you would have done, now the catch is unless you move out of the cell the grid considers you are still editing ,So Add this part
void dataGridView1_CellMouseUp(object sender, DataGridViewCellMouseEventArgs e)
{
if (e.ColumnIndex == 3)
dataGridView1.EndEdit();
}
This should be fine for you, 3 is the checkbox column you intend it to work for
I think my question is discriptive, or as Microsoft in the Documentation for Data Grid the question is, How do I have a combo box column display a sub set of data based upon the value of a different combo box column?
I have a DS with 3 tables filled, Customers, Orders, OrderDetails.
The order details is in a DataGridView with two combo boxes columns, 1 is the Location, and 1 the products. Both come from seperate Lookup Datasets.
What I want is that when the user selects the Location combo , the Products combo should be filtered to the locations its availiable. The Products is related to location by the LocationID
This is the solution from the documentation but it dosent work for me.
private void Form1_Load(object sender, EventArgs e)
{
this.territoriesTableAdapter.Fill(this.northwindDataSet.Territories);
this.regionTableAdapter.Fill(this.northwindDataSet.Region);
// Setup BindingSource for filtered view.
filteredTerritoriesBS = new BindingSource();
DataView dv = new DataView(northwindDataSet.Tables["Territories"]);
filteredTerritoriesBS.DataSource = dv;
}
private void dataGridView1_CellBeginEdit(object sender,
DataGridViewCellCancelEventArgs e)
{
if (e.ColumnIndex == territoryComboBoxColumn.Index)
{
// Set the combobox cell datasource to the filtered BindingSource
DataGridViewComboBoxCell dgcb = (DataGridViewComboBoxCell)dataGridView1
[e.ColumnIndex, e.RowIndex];
dgcb.DataSource = filteredTerritoriesBS;
// Filter the BindingSource based upon the region selected
this.filteredTerritoriesBS.Filter = "RegionID = " +
this.dataGridView1[e.ColumnIndex - 1, e.RowIndex].Value.ToString();
}
}
private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == this.territoryComboBoxColumn.Index)
{
// Reset combobox cell to the unfiltered BindingSource
DataGridViewComboBoxCell dgcb = (DataGridViewComboBoxCell)dataGridView1
[e.ColumnIndex, e.RowIndex];
dgcb.DataSource = territoriesBindingSource; //unfiltered
this.filteredTerritoriesBS.RemoveFilter();
}
}
I found a soulution provided by vb-tips.com
It seems to work great and filters the DGV upon loading the form
here is my code;
http://codepaste.net/wra8qw