I was trying my hand on binding in Wpf.I am trying to make a dataenrty screen.for instance,I have a textbox and a combobox and a listview.. users enter pick an item from the combobox,add a comment and add the item to the listview.This is the flow.I have a master table for the combobox,i have its selectedvalue bound to a Item field in the ordertable and the textbox.text bound to comments field in order table.fine up to now.
from here on i'm confused,should i bind the lsitview to the order table?.If yes then how will i create a new row in the datatable each time add row is clicked..?
if a new row is created in the datatable,next time the user selects an item it should be bind to the newly created row...how can i do this...pls help...i'm pulling my hairs on this...
you can see this
http://dotnetstories.wordpress.com/2009/03/28/create-a-simple-data-centric-wpf-application/
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I have a small project about datagridview and listbox in vb.net. But I don't know how can i create property table for each item which is inserted to list box.
I don't know how to describe but It's like that
I have a datagridview as property table to display and modified data, a text box and button to insert data to listbox.
When I add item "Shape1" it will create property table for"Shape1"
I fill data to property table for item "Shape1". Then save it as database.
Everytime when I click to item "shape1". It will show property table of shape1 again and I can modified and save it again.
Could you please tell me Is there any way or example to do like that.
I have two radgridviews where a row selected on grid #1 by the user appears automatically in grid #2. The new row in grid #2 needs to be programmatically selected as there may be further processing for that new row and the row index is needed.
Both grids use a datatable for their items source.
It is possible that the user can select the same item twice from grid #1. So the selected row in grid #2 must be the most current selection from grid #1.
How do I programmatically select the new row in grid #2?
Thanks
Datagrid in wpf is a derive class of ItemsControl which has the SelectedIndex property which you can use to get the first index of selection in your grid after which you can set the second grid selectedIndex to the first's.
int selectedIndex=grid1.SelectedIndex ;
grid2.SelectedIndex =selectedIndex.
I have a datagrid from devexpress in a winform application.I populated the datagrid from code (datasource=my datatable with 2 strings columns and one of type int (receive 0 and 1 values-should be checkbox on form).
I added a datagrid and from designer I added 3 columns.The last one of type checkbox.I set
UnboundType=Integer,
UnboundExpression=my column name from datatable :
DisplayFormat = Numeric,
columnedit = checkbox,
Displaycheckedvalue = 1,
displayuncheckedvalue = 0.
When I run the application always my checkboxes are blue.If i press one checkbox appear a check but when i go to the next row the previous value is again blue.What should i do so why the application keep the checks?
Don't set the column to be unbound, it is in your datasource after all.
What you want to do is just to set Displaycheckedvalue and displayuncheckedvalue as you have done, nothing more.
You can make a class which got a property for each column of your table. The int value would be a bool and so you can use List as datasource. The Grid will automaticly add checkboxes for the bool value.
If you want to use DataTable see Stig's post but in my opinion it is more beautiful to use classes and List.
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 am having some trouble with CheckBoxes in a DataGrid. The CheckBoxes are not bound to the entities that are populating the datagrid because there isn't a property on the entities for it. Basically what I am trying to do is when I check a CheckBox I add the ID of the item in that row to a list to be returned. The problem I am having is when I check some CheckBoxes and the page with the DataPager it uncheckes the CheckBoxes on the first page and tries to remove them but the DataGrid has already gone to the second page so it throws a null reference exception because it can't find those items anymore. How can I fix this? If you need me to post my code just let me know.
One approach to this is to customise the partial class that Entity Framework has created for you. Add your boolean property to the entity class. Now you can bind the checkbox column as any other column ant the data will be maintianed between paging.
You can then just enumerate through the items currently in the context select those have been checked.