I have datagrid and one panel. When I click on any row, all data should be appeared on that panel. And when I edit cell and after editing if I click another cell of same row, panel should be updated immediately. My datagrid is bound through item source (data table), so if I make any change to grid (add/delete/edit) my item source is updated and as per item source Panel is updated.
To achieve cell edit thing I use following code and it's working.
void DataGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
if (!isManualEditCommit)
{
isManualEditCommit = true;
DataGrid grid = (DataGrid)sender;
grid.CommitEdit(DataGridEditingUnit.Row, true);
isManualEditCommit = false;
}
}
Issue: Only issue is when this line gets called (grid.CommitEdit), it basically loading all rows again.and if datatable is really big than it takes few sec to load all rows. If I don't commit grid then my changes of datagrid appears on panel after I click on another row. I want to achieve it when i click on another cell of same row without loading rows again.
Here is Image
Pls help
Thanks
this is a common pitfall of the DataGrid : the commit logic. The solution i found (it was booleans, not numbers) was to make my own custom DataGridColumn, with my bindings triggers set on PropertyChanged, to have the content updated at once and not only on commit. Surely this is a little work, but DataGrid standards column won't allow you to change that commit logic.
Related
I'm fairly new to infragistics and i need help -
i need to add a checkbox to every cell in my grid while still displaying the cell value and allow user to check/uncheck the cell-
for ex - my grid has many columns - text, datetime, numbers etc
each cell will display the text/date/number and also have a checkbox for user to check/uncheck that field
IS THIS POSSIBLE?
One possible way is to add an editor in the grid cells. For example, you can add UltraTextEditor with StateEditorButton (on the left or right as is better for your solution) in each cell like this:
private void UltraGrid_InitializeRow(object sender, InitializeRowEventArgs e)
{
if (!e.ReInitialize)
{
foreach (UltraGridCell cell in e.Row.Cells)
{
StateEditorButton checkBox = new StateEditorButton();
UltraTextEditor textEditor = new UltraTextEditor();
textEditor.ButtonsRight.Add(checkBox);
cell.EditorComponent = textEditor;
cell.Column.ButtonDisplayStyle = ButtonDisplayStyle.Always;
}
}
}
Keep in mind this will add many editors to your grid - bad performance. Other possible solution is to add via Creation Filter the check boxes to your cells.
Either way the main question is - how you will save the checked state back to your data source? If you have a boolean column for each column you actually do not need to add any check boxes. So think how you will save this information.
Friends,
I have a WPF Combobox. When the Combobox is opened, I have the items dynamically generated based upon environment variables. So basically a combobox that is bound to a list that is dynamically changing.
Everything works as expected until I Exit the combobox with the dropdown open to enter another control(another combobox).
When I reopen the first combobox, the items appear to be frozen and no longer bound to the list when INDEED the list is changing and is still bound. Its almost like the binding broke.
When this event occurs, I have attempted to forcefully add items, and that doesn't work either. I can see in the code behind that the combobox now contains the additional items, yet it doesn't appear that contain them in the UI.
What is this black magic? Any way to prevent it? is this some type of Stuck focus issue? Maybe the dropdown isn't re-sizing?
I think i have narrowed it down to the physical dropdown is not re-sizing to the new items.
EDIT*
The controls are dynamically generating, so I have no real hard code to show you other than this.
private void CBControl_DropDownOpened(object sender, EventArgs e)
{
((ComboBox)sender).Items.Add("Option");
}
On this event, I will add an items to the combobox, although the items ARE being added to the list, they are not displayed in the UI.
EDIT 2*
I figured it out, so i have 2 comboboxes, it appears that the 2nd was steeling and holding the focus INSIDE the dropdown. (odd bug)
in order to fix it i needed to release it bu changing the index of the 2nd combo box WHILE it is open.
int sel = ComboBoxTwo.SelectedIndex;
ComboBoxTwo.IsDropDownOpen = true;
ComboBoxTwo.SelectedIndex = -1;
ComboBoxTwo.IsDropDownOpen = true;
ComboBoxTwo.SelectedIndex = sel;
and I had to manage the unintended recursive call.
So, here it is.
You got 2 ComboBoxes. If you Open one then directly click into another, the focus is moved to the second combobox dropdown.
If you make any changes to the first combobox, the changes will not take effect to the style(dropdown resize) UNTIL you release the focus from the 2nd combo box dropdown item. Although the items change will take effect, the resize wont.
to release the focus, you need to open the second combox and change the selected index like so:
int sel = ComboBoxTwo.SelectedIndex;
ComboBoxTwo.IsDropDownOpen = true;
ComboBoxTwo.SelectedIndex = -1;
ComboBoxTwo.IsDropDownOpen = true;
ComboBoxTwo.SelectedIndex = sel;
10 hours of debugging. 5 hours of research. First solution I have found. It may be dirty, but its all I can find.
I have a silverlight DataGrid, by default on page load the all the cells of the datagrid should be Readonly. I have 2 problem , can any one help me?
1.On Click on the RowHeader the current row should be editable
2. On click of the columnHearder current column of all row should be editable
This might not solve your entire problem but it should partially address it.
This is to make a column read-only in a datagrid
DataGrid.Columns[7].IsReadOnly = true;
Obviously the property can be changed from events but the data grid does not have row/column headers event handlers. Custom controls seem the way to go without introducing any new gui elements like buttons and changing the feel of the application.
I am having a Datagrid that gets populated with values from a DataTable. In my program i have four buttons: Goto First, Last, Next and Previous, as the name name indicates i have to select the rows based on the selection made using these buttons. Everything seems well if i use the below code to get the row (for example first row).
DataGridRow row =(DataGridRow)userControl.m_DataGrid.ItemContainerGenerator.ContainerFromIndex(0);
row.IsSelected = true;
But the code throws null value when there is more rows than the height of the Datagrid(When scrollbar comes into picture).
Please help me out of this issue. I think this is because of the view problem.
Due to virtualization the containers are only created when the object is in view, so you could first scroll the item into view using the respective method, wait for the creation of the container and then select it.
As this is rather messy i would suggest binding the IsSelected to a property on your item using a style for DataGridRow (set it as ItemContainerStyle). Then you can just set the property to true and scroll the item into view if need be.
I have a silverlight datagrid with a single editable column. This column has a combo box. To open the combo i have to click on the cell three times. Once to select the row, once to enter edit mode, and once to open the combo.
alt text http://lh4.ggpht.com/_L9TmtwXFtew/Sw6YursbUmI/AAAAAAAAGlg/QJCLu0K7o_8/image_thumb%5B6%5D.png
IMHO this is really bad UX so I would like the row to enter edit mode when the user does a row click or mouse over and allow the combo to be opened when with a single click.
The row would then drop out of edit mode if the user does a mouse off the row.
Is this possible?
What is the best way to approach this?
Thanks,
Mark
Simple way: handle DataGrid_MouseLeftButtonUp and make your desired behavior.
void MyDataGrid_MouseLeftButtonUp(sender , e)
{
if (MyDataGrid.SelectedItem != null) //ensure we have current item
{
//set current column
MyDataGrid.CurrentColumn = MyDataGrid.Columns[4];
//call begin edit
MyDataGrid.BeginEdit();
//now open combobox
MyComboBox.IsDropDownOpen = true; // a.)
}
}
I hope you catch the ideea.
a) * here I'm not sure if 100% working.
(and, of course, you need a reference to MyComboBox (ComboBox control defined in column template)*
Good luck
rlodina
setting datagrid.selectedIndex will fix the issue