I have tree grid. It has own Store which on item expand sends id and loads node values from server. now I want to add node in database and reload sub node and not all tree.
I got node using this function
var node = tree.getStore().getNodeById('69');
Now I want to simple say "node.load()". is it possible?
how to do this?
I found solution
tree.getStore().load({node: node});
Related
I am having some trouble trying to merge two JSON objects retrieved from my SQL Server database into a single object in Node-Red.
The flow I have created is the following:
For each call to the database I am receiving the following objects:
Plans:
[{"PlanID":2,"Status":0,"EndTime":"0001-01-01T00:00:00.000Z"}]
Goals:
[{"GoalID":1,"PlanID":2, "Type":2,"Message":"Walk 1000 km","Difficulty":0}]
I have created two functions which assign these objects into flow variables ('plans' and 'goals'), and now I was trying to merge both objects into a single JSON object.
I don't know if I have to use the Join node for this purpose and if so how to configure it, but my idea was to create a JSON object in this format:
[{"GoalID":1,"Plan":{"PlanID":2,"Status":0,"EndTime":"0001-01-01T00:00:00.000Z"}, "Type":2,"Message":"Walk 1000 km","Difficulty":0}]
First I wouldn't set them as flow variables as these will get over written if you get a second request in to the http-in node while the Database look ups are happening. Better to add them as msg variables then they flow with the msg and can't be overwritten.
Given you are not just combining the 2 objects to get the super set of keys and values you are probably best off just using either a function node or the change to assemble to the output object yourself.
Assuming the input looks something like:
msg.plans = [{"PlanID":2,"Status":0,"EndTime":"0001-01-01T00:00:00.000Z"}]
msg.goals = [{"GoalID":1,"PlanID":2, "Type":2,"Message":"Walk 1000 km","Difficulty":0}]
then the function node would look something like:
msg.payload = msg.goals[0];
msg.payload.plan = msg.plans[0];
delete msg.goals;
delete msg.plans;
return msg;
The change node rules would looks something like
The join node would work to get the 2 objects into an array or an object using the topics as keys to hold the 2 input messages.
I have received data from json web service with RESTRequest component
but I do not know how I should display the returned data in a grid?
How can I use RESTResponseDataSetAdapter to improve this?
Try this - it took me about 15 minutes to get working
Open the RESTDemos in your Delphi install's Samples\Object Pascal\Database\RESTDemo
Drop a TStringGrid on the RHS of the the Delphi-Praxis tab (I chose this one because
the URI on the Fetch to DataSet produces a 404 error).
If necessary, make the non-visual controls on the form visible.
Dbl-click BindingList and use the QuickBindings to add a LinkGridToDataSource. Set its
DataSource to ClientDataSet and its GridControl to StringGrid1. Thus will cause DBSourceDB1 to be created'.
Set the Response property of RestReponseDataSetAdaptor to `RESTResponse'.
Compile, run and click the fetch list of forums button. You should see the StringGrid populates
from the contents of memo_ResponseData
That should show you that LiveBindings can work with a RESTReponse to populate a grid. The RESTDemos demo has a lot more things in it, but if this is your first experience of LiveBindings, you might want to backtrack and try setting up a simple test project which populates a TStringGrid and a few TEdits from a dataset of your own.
I am creating a program in VB.NET which uses an online MySQL database to retrieve certain data. I have now succeeded in connecting and getting some basic stuff out of it. Now, what I want to do is that when an user presses a button it has to update the list. What happens is that the stuff that is already in the database also gets resent and so the list just doubles himself, although it adds the new database value.
How can I make sure that it only adds new values to the list, instead of adding all values from the list again? I have read that you can use the Preserve keyword with arrays, though this isn't an array and neither have I figured out how to convert my data into an array.
Private Sub generateList()
DB.writeQuery("SELECT snacks.ID, snacks.naam, snacks.baktijd FROM snacks")
While DB.DR.Read
ListBox1.Items.Add(DB.DR.Item("naam"))
End While
DB.closeConnection()
End Sub
This is the piece of code I use to generate the list, I reuse this code to refresh the list. As you can see, it uses my own written MySQL class. I know it makes an connection so there is nothing wrong with that.
Any help would be appreciated.
What you will want to do is to clear the ListBox before you reload the list. You can do this like so:
ListBox1.Items.Clear()
Then when you reload the list, the items will not be duplicated.
Looks like you need to clear your listbox before adding the items.
ListBox1.Items.Clear()
Try this my friend:
If Not listBox1.Items.Contains(DB.DR.Item("naam")) Then
ListBox1.Items.Add(DB.DR.Item("naam"))
else
'this item already exists.
end if
I use the json_data plugin of jsTree.
When I call:
$("#my_tree").jstree('get_json');
the function returns only the JSON data of the currently selected node.
If nothing is selected, then I can get the entire data and that's ok, but if a leaf is selected I only get the JSON part corresponding to the leaf.
What is the way to get always the JSON of the entire jstree?
PS: I don't want to manually deselect the currently selected node. That would be a dirty trick.
Like suggested in the comments I've tried:
$("#my_tree").jstree('get_json', -1);
and that works just fine.
I have a metro application,in which am trying to display table data continuously changing like data changing on tiles in windows 8 start-up screen.Actually here I have an Array contains many items and my table need to display those item-description.For every 5 secs I need to change item-description on my table, what should I do for my scenario?Can anyone give me advice..
Thank you.
I would recommend using databinding to accomplish this task.
Replacing simple arrays with a WinJS.Binding.List (which will notify the ListView about new or removed items) and using either the WinJS.Binding.mixin or WinJS.Binding.as to make the items themselves observable (see http://msdn.microsoft.com/en-us/library/windows/apps/br229801.aspx).
This way you can bind elements in your ListView itemtemplate to properties of your domain model, making the UI update itself as soon as you change something in the model.