How can i upload a file without clicking submit button & also how to delete this uploaded file in asp.net? I can only upload but i can't delete this uploaded file.My CODE BEHIND SOURCE:
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
public void UploadDocument(object sender, EventArgs e)
{
fuDocument.SaveAs(Server.MapPath("~/Documents/" + Path.GetFileName(fuDocument.FileName)));
lblMsg.Visible = true;
}
}
}
To upload a file, you can use javascript - there are many examples of this on SO and the web in general. Such as:
https://cmatskas.com/upload-files-in-asp-net-mvc-with-javascript-and-c/
You say that you "Can't delete" the file. How are you trying to delete it and what happens when you try? If it's an exception, what is the message and stack trace?
Related
I make a Wpf projcect which demos how to use WebView to Navigate a html file inside of the App, but fails.
The main cs file code is below:
public MainWindow()
{
this.InitializeComponent();
this.wv.ScriptNotify += Wv_ScriptNotify;
this.Loaded += MainPage_Loaded;
}
private async void Wv_ScriptNotify(object sender, Microsoft.Toolkit.Win32.UI.Controls.Interop.WinRT.WebViewControlScriptNotifyEventArgs e)
{
//await (new MessageDialog(e.Value)).ShowAsync();
textBlock.Text = e.Value;
//返回结果给html页面
await this.wv.InvokeScriptAsync("recieve", new[] { "hehe, 我是个结果" });
}
private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
//我们事先写好了一个本地html页面用来做测试
this.wv.Source = new Uri("ms-appx-web://Assets/index.html");
//this.wv.Source = new Uri("http://www.baidu.com");
}
And the html file index.html is inside of the project, located at Assets/index.html. Its source code is here:
https://github.com/tomxue/WebViewIssueInWpf/raw/master/WpfApp3/Assets/index.html
I put the project code onto GitHub: https://github.com/tomxue/WebViewIssueInWpf.git
If the project works well, when WebView visits the inner html file, it should show a button at first.
But I saw nothing.
More:
According to the accepted answer(Thank to Pavel Anikhouski), I changed my code as below and it now works.
private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
//我们事先写好了一个本地html页面用来做测试
//this.wv.Source = new Uri("ms-appx-web://Assets/index.html");
//this.wv.Source = new Uri("http://www.baidu.com");
var html = File.ReadAllText("../../Assets\\index.html");
wv.NavigateToString(html);
}
It seems to be a known issue with WebView control in WindowsCommunityToolkit
You can use only absolute URIs to resources in members of the WebView control that accept string paths.
WebView controls don't recognize the ms-appx:/// prefix, so they can't read from the package (if you've created a package for your
application).
WebView controls don't recognize the File:// prefix. If you want to read a file into a WebView control, add code to your application that
reads the content of the file. Then, serialize that content into a
string, and call the NavigateToString(String) method of the WebView
control.
So, instead of loading a file this.wv.Source = new Uri("ms-appx-web://Assets/index.html"); try to read a local file and then navigate to the string
var html = File.ReadAllText("Assets\\index.html");
this.wv.NavigateToString(html);
It should work fine (I've seen the button and message at my end). Also, don't forget to copy Assets\index.html to the output directory (set Copy Always or Copy if newer)
I have been trying to follow this blog http://world.episerver.com/Blogs/Anders-Hattestad/Dates/2013/1/Upload-within-Xform/
The form upload works, however the file does not appear in the email, but is uploaded onto the server, so its doing something.
The instructions I have are...
Just attach to the
BeforeSubmitPostedData event
Check if ((e.FormData.ChannelOptions & ChannelOptions.Email) != ChannelOptions.Email) is true
then send the custom mail and remove the send mail option
e.FormData.ChannelOptions &= ~ChannelOptions.Email;
If anyone could simplify this for me, would be appreciated...
Many Thanks.
Marc.
in Application_Start in your global.asax you need to attach to the XFormControl.ControlSetup Event
protected void Application_Start(object sender, EventArgs e)
{
XFormControl.ControlSetup += new EventHandler(XForm_ControlSetup);
}
Then in your XForm_ControlSetup method, attach to the relevant event
public void XForm_ControlSetup(object sender, EventArgs e)
{
XFormControl control = (XFormControl)sender;
control.BeforeSubmitPostedData += new SaveFormDataEventHandler(XForm_BeforeSubmitPostedData);
}
And in your XForm_BeforeSubmitPostedData method
public void XForm_BeforeSubmitPostedData(object sender, SaveFormDataEventArgs e)
{
// Untested
if ((e.FormData.ChannelOptions & ChannelOptions.Email) != ChannelOptions.Email)
{
// Send custom mail here
// Remove the send mail option
e.FormData.ChannelOptions &= ~ChannelOptions.Email;
}
// End untested :)
}
I want to send data to the server when you close the application
public App()
{
this.Startup += this.Application_Startup;
this.Exit += this.Application_Exit;
this.UnhandledException += this.Application_UnhandledException;
InitializeComponent();
}
private void Application_Exit(object sender, EventArgs e)
{
ClientReverse.UserExitGameAsync((Guid)Login);
}
Server:
public void UserExitGame(Guid UserGuid)
{
Games.Games.ExitUserGames(UserGuid);
}
but the server side is not satisfied.
It is already too late when you reach the ApplicationExit event.
I have seen Javascript that keeps on a webpage until confirmed (Stack Overflow does it a lot). You might want to modify a version of that Javascript that sends a message back to the Silverlight app before it allows page closing.
Calling Silverlight methods from JS is easy (you can simply expose SL methods to JS with the [Scriptable] attribute).
I got the code below that is trying to load an image from the web into an Image control, when I run it I get an error on the given line that no network access is allowed:
private void button1_Click(object sender, RoutedEventArgs e)
{
WebClient webClientImgDownloader = new WebClient();
webClientImgDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(webClientImgDownloader_OpenReadCompleted);
webClientImgDownloader.OpenReadAsync(new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute));
}
void webClientImgDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(e.Result); // ERROR HERE!
image1.Source = bitmap;
}
Silverlight for Windows Phone 7
Trying to download content with WebClient will require a client access policy file to be present on the source server. For images you can avoid this requirement by doing it like this:-
private void button1_Click(object sender, RoutedEventArgs e)
{
Uri uri = new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute)
image1.Source = new BitmapImage(uri);
}
I see you're retrieving the image from Dilbert.com does that site have a cross domain policy file?
Silverlight doesn't support GIF only JPG, so I wrote:
www.lenniedevilliers.net/displaygif.aspx?link=http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif
the displaygif.aspx page convert the GIF into a JPG.
Can you give us the full exception stack trace? the error could be that your phone emulator does not have internet access, or it could be the image on the dilbert server that does not allow anonymous requests that did not originate from their site ... so guidance on a solution will differ :-)
I have a few users that are using a silverlight app that aren't recieving updates when a new release is published. Isn't this suppose to be automatic or perhaps I'm missing an option somewhere? I was also starting to think that maybe the XAP file is cached and I some how need to prevent that.
Any thoughts out there?
You need to write a few lines of code.
If you're familiar with 'one click' deployment then some of the options you're used to don't exist in Silverlight. You need to write the code yourself.
http://nerddawg.blogspot.com/2009/07/silverlight-out-of-browser-apps-how.html
private void Application_Startup(object sender, StartupEventArgs e)
{
this.RootVisual = new MainPage();
if (Application.Current.IsRunningOutOfBrowser)
{
Application.Current.CheckAndDownloadUpdateAsync();
}
and then in your App() constructor :
Application.Current.CheckAndDownloadUpdateCompleted +=
new CheckAndDownloadUpdateCompletedEventHandler(Current_CheckAndDownloadUpdateCompleted);
and an event handler :
void Current_CheckAndDownloadUpdateCompleted(object sender, CheckAndDownloadUpdateCompletedEventArgs e)
{
// http://nerddawg.blogspot.com/2009/07/silverlight-out-of-browser-apps-how.html
if (e.UpdateAvailable)
{
MessageBox.Show("The application has been updated! Please close and reopen it to load the new version.");
}
else if (e.Error != null && e.Error is PlatformNotSupportedException)
{
MessageBox.Show("An application update is available, " +
"but it requires a new version of Silverlight. " +
"Please contact tech support for further instructions.");
}
}
It only auto updates if the developer performs the CheckAndDownloadUpdateAsync() call. See updates: http://timheuer.com/blog/archive/2009/07/10/silverlight-3-released-what-is-new-and-changed.aspx#oob