If you call a Web service from your Android App (I believe this should work in other Java Apps as well but personally tested in Android), you probably will want to convert InputStream into a string which is not that simple. And here is simpliest way how to do that:
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
if(conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStream inStream = new BufferedInputStream(conn.getInputStream());
// Here are we go:
String res = new Scanner(inStream).useDelimiter("\\\\A").next();
}
0a0f90a6-1dcf-4337-8c6d-d73f16ce6013|0|.0
Faced an interesting problem: when I want to change ApplicationBar visibility by by changing instance IsVisible property, I always get NullReference exception. To avoid this use static member instead:
ApplicationBar.IsVisible = true;
Guess why? Because ApplicationBar is not a Silverlight element and general behavior doesn’t apply to it.
Update: the same happens when you want to add/remove a button – so use static Button property.
66eb7d14-deed-41f1-baca-cf2d4afa944c|0|.0
When you gonna run an WCF REST service within an MVC project, you may noticed that you need to add this service to MVC routing table in Global.asax.cs file. By default it is suggested to be like this:
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.Add(new ServiceRoute("MyRest", new WebServiceHostFactory(), typeof(MyRest)));
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
);
But in this case each of your ordinary MVC Action Url will be replaced to this: /MyRest?action=Index&controller=Home which won’t work. If you put REST route to the bottom of RegisterRoutes procedure, your service will become unavailable and you’ll get 404 “Not Found” when you try to call it. Sounds like order does matter.
So the only way is to map all your routes together at the same time. Here is how your RegisterRoutes should look like:
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = UrlParameter.Optional }, // Parameter defaults
new { controller = "^(?!MyRest).*" }
);
routes.Add(new ServiceRoute("MyRest", new WebServiceHostFactory(), typeof(MyRest)));
Quite tricky and not obvious at least to me. Have fun coding!
Technorati Tags:
ASP.NET MVC,
RESTful88cbd550-99c3-49c1-930a-f48376486b9f|1|5.0
Use this snippet when you need to get an Url to virtual root path in your ASP.NET projects. You may need this, for example, when you want to call dynamically a REST Web service which is part of the same project (my story). I have found few ways to do this including storing such kind of info in Web.config file. But below is more short and convenient way. Just don’t forget to add trailing slash to the end because this function doesn’t do it by its self.
string baseUrl = Request.Url.GetLeftPart(UriPartial.Authority);
Hope this helps.
a9e95bdc-5211-4c3c-92e8-4bd48b6b8142|0|.0
Although Windows Phone 7 Apps keep their data in an isolated storage which is not easy find outside of Application, I still prefer to keep all sensitive data (such as user names/passwords etc.) encrypted so they won’t be compromised in case if the phone will be lost or stolen.
This function encrypt a string using given password and salt:
/// <summary>
/// Encrypt a string using AES
/// </summary>
/// <param name="Str">String to encrypt</param>
/// <param name="Password">Encryption password</param>
/// <param name="Salt">A salt string</param>
/// <returns>Encrypted string in case of success; otherwise - empty string</returns>
public static string EncryptString(string Str, string Password, string Salt)
{
try
{
using (Aes aes = new AesManaged ())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes (Password, Encoding .UTF8.GetBytes(Salt));
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
using (MemoryStream encryptionStream = new MemoryStream ())
{
using (CryptoStream encrypt = new CryptoStream (encryptionStream, aes.CreateEncryptor(), CryptoStreamMode .Write))
{
byte [] utfD1 = UTF8Encoding .UTF8.GetBytes(Str);
encrypt.Write(utfD1, 0, utfD1.Length);
encrypt.FlushFinalBlock();
}
return Convert .ToBase64String(encryptionStream.ToArray());
}
}
}
catch
{
return "" ;
}
}
And this one – decrypt your data back:
/// <summary>
/// Decrypt encrypted string
/// </summary>
/// <param name="Str">Encrypted string</param>
/// <param name="Password">Password used for encryption</param>
/// <param name="Salt">Salt string used for encryption</param>
/// <returns>Decrypted string if success; otherwise - empty string</returns>
public static string DecryptString(string Str, string Password, string Salt)
{
try
{
using (Aes aes = new AesManaged ())
{
Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes (Password, Encoding .UTF8.GetBytes(Salt));
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
using (MemoryStream decryptionStream = new MemoryStream ())
{
using (CryptoStream decrypt = new CryptoStream (decryptionStream, aes.CreateDecryptor(), CryptoStreamMode .Write))
{
byte [] encryptedData = Convert .FromBase64String(Str);
decrypt.Write(encryptedData, 0, encryptedData.Length);
decrypt.Flush();
}
byte [] decryptedData = decryptionStream.ToArray();
return UTF8Encoding .UTF8.GetString(decryptedData, 0, decryptedData.Length);
}
}
}
catch
{
return "" ;
}
}
Technorati Tags:
silverlight,
wph70f687cc3-0312-435d-b5d7-f0acdf8e17d8|5|5.0
If you ever programmed for Windows Mobile 6.x OS and earlier, you should be noticed that SIP supports Hide/Show methods when you would like to rise up or close its virtual keyboard. For a whatever reason the modern Microsoft OS doesn't support such operation directly but as always there is a way around: just move input focus to somewhere else, for example to the page:
this.Focus();
and SIP will be closed immidiately.
7a971b73-00f2-46db-8b3c-e3ccddc8faa8|0|.0
I was looking for a snippet to add a custom header to WCF service request. Why? For example, to add authentication header to add Basic Authentication support. (Yes – WCF supports Basic Authorization by itself but didn’t find how to use it without SSL).
Here is the shortest way.
Use this snippet on your client side:
using (MyServ.ServiceClient proxy = new MyServ.ServiceClient ())
{
using (new System.ServiceModel.OperationContextScope (proxy.InnerChannel))
{
MessageHeader head = MessageHeader .CreateHeader("Authorization" , "http://mynamespace.com/v1" , data);
OperationContext .Current.OutgoingMessageHeaders.Add(head);
}
}
And just in case, here is how to retrieve this information from Http header on the server side:
string auth = OperationContext .Current.
IncomingMessageHeaders.
GetHeader<string >("Authorization" , "http://mynamespace.com/v1" );
More about OperationContextScope Class here.
7d745302-c6c7-471e-a8b0-1b2a0adb569b|0|.0
For a reason .NET lacks FlushWindowEx function so glad we can PInvoke it.
Declare FlushWindowEx and its dependencies:
[StructLayout (LayoutKind .Sequential)]
public struct FLASHWINFO
{
public UInt32 cbSize;
public IntPtr hwnd;
public Int32 dwFlags;
public UInt32 uCount;
public Int32 dwTimeout;
}
[Flags ]
public enum FlashMode
{
FLASHW_STOP = 0,
FLASHW_CAPTION = 1,
FLASHW_TRAY = 2,
FLASHW_ALL = (FLASHW_CAPTION | FLASHW_TRAY),
FLASHW_TIMER = 4,
FLASHW_TIMERNOFG = 12
}
[DllImport ("user32.dll" )]
static extern Int32 FlashWindowEx(ref FLASHWINFO pwfi);
then just call it like this:
FLASHWINFO fw = new FLASHWINFO ();
fw.cbSize = Convert .ToUInt32(Marshal .SizeOf(typeof (FLASHWINFO )));
fw.hwnd = this .Handle;
fw.dwFlags = (Int32 )FlashMode .FLASHW_ALL;
fw.uCount = 5;
FlashWindowEx(ref fw);
57c3d67b-815d-4666-8464-b2d1aa8246b4|0|.0
Playing with most recent Windows Phone 7 Tools I found that custom icons don’t appear in emulator by default although they exist in a solution.
<shell:ApplicationBarIconButton IconUri="/Images/add.png" Text="Add" Click="AddClick" />
<shell:ApplicationBarIconButton IconUri="/Images/remove.png" Text="Remove" Click="RemoveClick"/>
This happens because pictures adding with “Resource” as default build action. To make this work, select your recently added picture in Solution Explorer, switch to Properties and change Build Action to “Content”. After recompiling you will get your icons in place.
5944cc27-d395-4b9d-a084-5253856d5d27|1|5.0
I'm pretty sure you all noticed that when you move your cursor under an App in Windows 7 Task bar, small window copy (aka Thumbnail) appear and there are small buttons on some windows could be attached. Good examples are Windows Media Player or WinAmp.
There is a good reason to put such buttons there: using them you can manage this Application without necessity to open its window.
Here is how to add this functionality to your own WPF App.
Add reference to TaskBatItemInfo just like we did to add progress bar in this post.
Add references to ThumbButtonInfo, so you will see something like this:
<Window.TaskbarItemInfo>
<TaskbarItemInfo>
<TaskbarItemInfo.ThumbButtonInfos>
<ThumbButtonInfo ImageSource="/IconProgressDemo;component/Icon1.ico" Description="Play!" Click="ThumbButtonInfo_Click" />
<ThumbButtonInfo ImageSource="/IconProgressDemo;component/Icon2.ico" Description="Stop!" Click="ThumbButtonInfo_Click" />
</TaskbarItemInfo.ThumbButtonInfos>
</TaskbarItemInfo>
</Window.TaskbarItemInfo>
Now just handle Click event in way you want and you done!
private void ThumbButtonInfo_Click(object sender, EventArgs e)
{
MessageBox .Show((sender as System.Windows.Shell.ThumbButtonInfo ).Description);
}
Technorati Tags:
WPF4,
.NET4,
C#d1d01cb7-2f22-4934-b411-4ca93be0a462|0|.0