just got some Problems with Loading Xaml Files by Runtime.
For your Information my Code-Snippet to Load the File as Content of a Usercontrol:
public UserControl LoadXaml(FileInfo paramFile)
{
FileInfo _XamlFile = paramFile;
UIElement rootElement;
FileStream s = new FileStream(_XamlFile.FullName, FileMode.Open);
rootElement = (UIElement)XamlReader.Load(s);
s.Close();
UserControl uc = new UserControl();
if (rootElement.GetType() == typeof(Window))
{
uc.Content = (rootElement as Window).Content;
}
else
{
uc = rootElement as UserControl;
}
return uc;
}
private void lstPDFDokumente_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var _XamlFile = ((System.Windows.Controls.ListBox)sender).SelectedItem as FileInfo;
if (_XamlFile != null)
{
layoutGrid.Children.Clear();
System.Windows.Controls.UserControl rootElement;
rootElement = XamlController.LoadXaml(_XamlFile);
layoutGrid.Children.Add(rootElement);
}
}
This works fine while Events and x:Class="..." are deleted by hand.
The Problems I try to solve are:
If there is a x:Class="..." at the root element the XamlReader throws the first exception.
When the XamlReader reaches a Control which contains an event, for Example Click or TextChanged, it throws another Exception.
What i try to figure out is how to load a XamlFile, show it inside of a Control in the main Window and to show some of the attributes like Name,Height,Width and so on.
Just read dozens of Websites but never found a topic about to make a preview or things like that.
One of the solutions i tried is to read the Xaml File as XML and delete that code.
The Problem was to get a list of all possible Events in C#.
If there are some Questions to that Code, feel free to ask :)
Greetings
Daniel
Related
I have 2 dropdowns (pickers) on a XAML form. The first is an ObservabelCollection of Territories. The second is an ObservableCollection of type Tracks. When the form loads my ViewModel loads both collections and each collection is bound to a picker. I want to filter and display only those tracks that are associated with the selected territory in the second picker.
FYI-the second picker is disabled until a selection is made in the first. Actually I don't require that the second picker's data source be set as the form loads, unless the solution requires it. The selection in the first picker will be the key to filter the data for the second.
I have tried to handle the filtering in the Territory picker's SelectedIndexChanged event but my ObservableCollection 'tracks' is not exposed here.
private void territoryPicker_SelectedIndexChanged(object sender, EventArgs e)
{
var picker = (Picker)sender;
string territory = picker.SelectedItem.ToString();
Tracks _track = tracks.Where(X => X.Territory = territory);<<<==== Does not work
trackPicker.ItemsSource = _track.Track;<<<==== Does not work
trackPicker.IsEnabled = true;
}
I've also tried to not build the Tracks OC until after the Territory is selected like this:
private void territoryPicker_SelectedIndexChanged(object sender, EventArgs e)
{
var picker = (Picker)sender;
string territory = picker.SelectedItem.ToString();
TrackViewModel vm = new TrackViewModel();
var _tracks = (Tracks)vm.Tracks; <<<<<==== This does not work
trackPicker.IsEnabled = true;
}
The ViewModel runs and the tracks are loaded via the API but when it returns here Tracks is empty.
I'm open to a reasonable solution (not 3rd party controls/packages) that will accomplish this task . Thanks
I figured it out by stumbling over the answer while researching another issue. I have been referencing my viewmodel in the {content].xaml page like this.
<ContentPage.BindingContext>
<vm:TrackViewModel />
</ContentPage.BindingContext>
When doing so the resources of that vm were not available in the code behind. But when I reference the VM in the page constructor Like this:
public partial class RequestmyTracks : ContentPage
{
TrackViewModel trackviewmodel = new TrackViewModel();
And then bind it here:
public RequestmyTracks()
{
InitializeComponent();
BindingContext = trackviewmodel;
}
The trackviewmodel is accessible in the SelectedIndexChanged event and everything else was really straight forward, Which looks like this:
private void territoryPicker_SelectedIndexChanged(object sender, EventArgs e)
{
var picker = (Picker)sender;
string territory = picker.SelectedItem.ToString();
ObservableCollection<Tracks> dah = (ObservableCollection<Tracks>)trackviewmodel.Tracks;
List<string> trackNames = new List<string>();
foreach (var track in dah)
{
if (track.Territory == territory)
trackNames.Add(track.Track);
}
trackPicker.ItemsSource = trackNames;
if(trackNames.Count ==1)
trackPicker.SelectedIndex = 0;
trackPicker.IsEnabled = true;
}
Thanks for the help
I'm simply trying to attach a file named Document.pdf in the DocumentsLibrary to an email using the Share Charm. My code below works perfectly on the Local Machine:
private async void OnDataRequestedFiles(DataTransferManager sender, DataRequestedEventArgs e)
{
List<IStorageItem> shares = new List<IStorageItem>();
StorageFile filetoShare = await Windows.Storage.KnownFolders.DocumentsLibrary.GetFileAsync("Document.pdf");
if (filetoShare != null)
{
shares.Add(filetoShare);
filetoShare = null;
}
if (shares != null)
{
DataPackage requestData = e.Request.Data;
requestData.Properties.Title = "Title";
requestData.Properties.Description = "Description"; // The description is optional.
requestData.SetStorageItems(shares);
shares = null;
}
else
{
e.Request.FailWithDisplayText("File not Found.");
}
}
But when I run the exact same code on a Windows Surface Tablet, I get the dreaded "There's nothing to share right now." on the right in the Charms flyout area.
Here's a little more background to help:
I'm not looking to use a File Picker...I know the exact file I'm looking for
I've enabled the Documents Library Capability in the manifest
I've added a File Type Association for pdf in the manifest
and yes, the file does exist and is in the Documents Library
an email account is properly setup in the Mail App on the surface
I can successfully send text emails from the Tablet...just not emails with attachments
Like I said, this works on my Win 8 Development Machine as expected...just not on the Surface. I'm wondering if the Surface has different file or folder permissions?
Thanks for the help...this is driving me CRAZY
I finally figured it out - the problem was that my Event Handler was async (so that I could use await to set the StorageFile variable).
I solved it by setting the StorageFile variable earlier in my code so that it was already available when the Event Handler was called.
I still have no idea why it worked on my development machine, but no on the WinRT surface...
The handler can be an async method. In this case, it is critical to use DataTransferManager. Please refer to the MSDN page specifically for this scenario. For your convenience, the code from the page is copied to here:
private void RegisterForShare()
{
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
dataTransferManager.DataRequested += new TypedEventHandler<DataTransferManager,
DataRequestedEventArgs>(this.ShareStorageItemsHandler);
}
private async void ShareStorageItemsHandler(DataTransferManager sender,
DataRequestedEventArgs e)
{
DataRequest request = e.Request;
request.Data.Properties.Title = "Share StorageItems Example";
request.Data.Properties.Description = "Demonstrates how to share files.";
// Because we are making async calls in the DataRequested event handler,
// we need to get the deferral first.
DataRequestDeferral deferral = request.GetDeferral();
// Make sure we always call Complete on the deferral.
try
{
StorageFile logoFile =
await Package.Current.InstalledLocation.GetFileAsync("Assets\\Logo.png");
List<IStorageItem> storageItems = new List<IStorageItem>();
storageItems.Add(logoFile);
request.Data.SetStorageItems(storageItems);
}
finally
{
deferral.Complete();
}
}
It is critical to place the following statement before any async method is called:
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
You only have half a second to get the whole job done (getting the file, attaching...etc.). If the half-second deadline occurs you'll get this "driving crazy" message. Consider implementing some resumable logic and replace the message with "the attachment is being prepared please try again in a few seconds" (or else).
Your WinRT device might be just slower than your development machine. The latter just does the job before the deadline...
I am completely new in Windowsphone7.i have develop sample application in that i want give the option to change the font-color,Size,style(Italic/Bold) as Dynamically(like RadEditor) .please help me how to resolve this option.
If you Develop your Application MVVM style then it is not so hard to do this. You just need a property for every setting you want to set dynamically and then bind to this properties. And you create a Settings View where you can set the properties and if you change them you use INotifyPropertyChanged to broadcast that your properties value changed and so every control which is bound to that property will change and redraw.
GalaSoft MVVM
MVVM Codeplex
Easy MVVM sample Application for Windows Phone 7
The link you found to save an image looks ok, but i did it a bit different, actually from the CameraCaptureTask you already get a WritableBitmap Image and you can save it like this.
To save the Image:
private void SaveToIsolatedStorage(WriteableBitmap image, string fileName)
{
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myIsolatedStorage.FileExists(fileName))
{
myIsolatedStorage.DeleteFile(fileName);
}
using (var stream = myIsolatedStorage.OpenFile(fileName, FileMode.Create))
{
Extensions.SaveJpeg(image, stream, image.PixelWidth, image.PixelHeight,0, 100);
}
}
}
To read the Image:
private WritableBitmap ReadFromIsolatedStorage(string fileName)
{
WriteableBitmap bitmap = new WriteableBitmap(200,200);
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (store.FileExists(fileName))
{
using (var stream = store.OpenFile(fileName,FileMode.Open))
{
bitmap.SetSource(stream);
}}
}
return bitmap;
}
I hope this will work because i wrote it from scratch. :)
And in your ViewModel you should have a WritableBitmap Property which is bound to your Image Control on your View.
To use a lot of images and work with them you should read a bit more about this, because somehow SL Images use a lot of memory so you will need to address this problem somehow in the future.
I'm trying to implement a customization in SharePoint 2010 so that when a document is uploaded to a library, the file name is changed to include the Document ID in the name. (I know that people shouldn't worry about file names as much any more, but we have a lot of legacy files already named and users who like to have local copies).
I was able to implement a custom Event Receiver on the ItemAdded event that renames the file by adding the Document ID before the file name. This works correctly from the web Upload.
The problem is with the Explorer View. When I try to add the file using WebDAV in the Explorer View, I get two copies of the file. It seems that when a file is uploaded via the Web the events that fire are
ItemAdding
ItemAdded
But when I copy/paste a file into Explorer View I see the following events:
ItemAdding
ItemAdded
ItemAdding
ItemAdded
ItemUpdating
ItemUpdated
The result is I have two files with different names (since the Document IDs are different).
I've found a lot of people talking about this issue online (this is the best article I found). Anyone have any other ideas? Would it make more sense to do this in a workflow instead of an event receiver? I could use a scheduled job instead, but that might be confusing to the user if the document name changed a few minutes later.
This is my code that works great when using the Web upload but not when using Explorer View:
public override void ItemAdded(SPItemEventProperties properties)
{
try
{
SPListItem currentItem = properties.ListItem;
if (currentItem["_dlc_DocId"] != null)
{
string docId = currentItem["_dlc_DocId"].ToString();
if (!currentItem["BaseName"].ToString().StartsWith(docId))
{
EventFiringEnabled = false;
currentItem["BaseName"] = docId + currentItem["BaseName"];
currentItem.SystemUpdate();
EventFiringEnabled = true;
}
}
}
catch (Exception ex)
{
//Probably should log an error here
}
base.ItemAdded(properties);
}
I have found that using a Visual Studio workflow allows me the most flexibility to do this. A SharePoint Designer Workflow would be simpler, but would be harder to deploy to different sites and libraries.
After reading some good articles including this and this I have come up with this code which seems to work. It starts a workflow and waits until the document is not in a LockState and then processes the filename.
The workflow looks like this:
And here is the code behind:
namespace ControlledDocuments.RenameWorkflow
{
public sealed partial class RenameWorkflow : SequentialWorkflowActivity
{
public RenameWorkflow()
{
InitializeComponent();
}
public Guid workflowId = default(System.Guid);
public SPWorkflowActivationProperties workflowProperties = new SPWorkflowActivationProperties();
Boolean continueWaiting = true;
private void onWorkflowActivated1_Invoked(object sender, ExternalDataEventArgs e)
{
CheckFileStatus();
}
private void whileActivity(object sender, ConditionalEventArgs e)
{
e.Result = continueWaiting;
}
private void onWorkflowItemChanged(object sender, ExternalDataEventArgs e)
{
CheckFileStatus();
}
private void CheckFileStatus()
{
if (workflowProperties.Item.File.LockType == SPFile.SPLockType.None)
{
continueWaiting = false;
}
}
private void renameFile(object sender, EventArgs e)
{
try
{
SPListItem currentItem = workflowProperties.Item;
if (currentItem["_dlc_DocId"] != null)
{
string docId = currentItem["_dlc_DocId"].ToString();
if (!currentItem["BaseName"].ToString().StartsWith(docId))
{
currentItem["BaseName"] = docId + currentItem["BaseName"];
currentItem.SystemUpdate();
}
}
}
catch (Exception ex)
{
//Should do something useful here
}
}
}
}
Hope this helps someone else if they have the same problem.
Well i'd go for the workflow workaround... there are 2 options imo:
1) Create a boolean fied in your document library, then create a SPD workflow that fires when the item is added and set that field to "Changed" or something. In the EventReceiver you then check whether that field has been set..
2) Do everything with the SPD workflow - changing the title like in this example should be no problem.
I have four children in a parent container. Each child form is a test for the user to type correct answers into text boxes. Option to open each form is on a menu strip in the parent. In form load, I have disabled all but the first form option. I only want the second form to become available if the first form answers are correct. I would like to figure this out on my own as much as possible. I have searched on line but since I am not sure what to ask, I have not found and answer. Can someone get me started in the right direction? Perhaps some reading that would explain how to go about this, or what I should be typing into google to get what I'm looking for.
Thanks.
private bool CheckFormExistence(stringformName)
{
bool formFound = false;
foreach (Form formTest in MdiChildren)
if (formTest.Name== formName)
{
Activate();
formFound = true;
}
return formFound;
}
private void toolStripMenuItemStationOne_Click(object sender, EventArgs e)
{
bool formExists = false;
FormBlue1 blueOne;
formExists = CheckFormExistence("FormBlue1");
if (!formExists)
{
blueOne = new FormBlue1();
blueOne.MdiParent = this;
blueOne.Show();
}
}