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Formula to Convert CMYK to RGB values

Tuesday, September 11th, 2012 at 4:21 pm

It is possible to convert CMYK values to RGB values. We can see how to do this in the following section.

Consider the cyan, magento, yellow and black values of CMYK as c, m, y and k respectively. Now we can find the equivalent RGB values using the following formulas :

r = (1-k)-(1-k)*c;

g = (1-k)-(1-k)*m;

b = (1-k)-(1-k)*y;

Here, r, g and b will have the corresponding red, green and blue values.

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Setting polygon properties dynamically in WP7

Wednesday, September 5th, 2012 at 9:52 am

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Following code snippet will create polygon and set properties dynamically:

Polygon polygon = new Polygon;

polygon.Points = new PointCollection()
{

new Point(150, 50),
new Point(10, 50),
new Point(50, 20)
};
polygon.Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Blue);
polygon.Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Red);
polygon.StrokeThickness = 3;
polygon.Opacity = 0.5;

Dynamically creating polygon in windows phone 7

Tuesday, July 24th, 2012 at 9:09 am

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The following code snippet will create a polygon dynamically:

Polygon polygon = new Polygon();

..

polygon.Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Red);

polygon.Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Yellow);

polygon.StrokeThickness = 5;

polygon.Opacity = 0.4;
polygon.Points = new PointCollection()
{

new Point(150, 50),
new Point(10, 50),
new Point(50, 20)

};
grid.Children.Add(polygon);

That's it!

Polygon polygon = new Polygon();

polygon.Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Red);

polygon.Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Yellow);

polygon.StrokeThickness = 5;

polygon.Opacity = 0.4;

polygon.Points = new PointCollection()

{

new Point(150, 50),

new Point(10, 50),

new Point(50, 20)

};

grid.Children.Add(polygon);

That's it!

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How to determine Windows Java installation location?

Friday, June 29th, 2012 at 2:23 pm

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private string GetJavaInstallationPath()
{
    string environmentPath = Environment.GetEnvironmentVariable("JAVA_HOME");
    if (!string.IsNullOrEmpty(environmentPath))
    {
       return environmentPath;
    }

    string javaKey = "SOFTWARE\\JavaSoft\\Java Runtime Environment\\";
    using (Microsoft.Win32.RegistryKey rk = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(javaKey))
    {
        string currentVersion = rk.GetValue("CurrentVersion").ToString();
        using (Microsoft.Win32.RegistryKey key = rk.OpenSubKey(currentVersion))
        {
            return key.GetValue("JavaHome").ToString();
        }
    }
}

Then to use it, just do the following:
string installPath = GetJavaInstallationPath();
string filePath = System.IO.Path.Combine(installPath, "bin\\Java.exe");
if (System.IO.File.Exists(filePath))
{
    // We have a winner
}

private string GetJavaInstallationPath()

{

string environmentPath = Environment.GetEnvironmentVariable("JAVA_HOME");

if (!string.IsNullOrEmpty(environmentPath))

{

return environmentPath;

}

string javaKey = "SOFTWARE\\JavaSoft\\Java Runtime Environment\\";

using (Microsoft.Win32.RegistryKey rk = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(javaKey))

{

string currentVersion = rk.GetValue("CurrentVersion").ToString();

using (Microsoft.Win32.RegistryKey key = rk.OpenSubKey(currentVersion))

{

return key.GetValue("JavaHome").ToString();

}

Then to use it, just do the following:

string installPath = GetJavaInstallationPath();

string filePath = System.IO.Path.Combine(installPath, "bin\\Java.exe");

if (System.IO.File.Exists(filePath))

{

// We have a winner

}

Integrating Contact list to an app in windows phone

Friday, June 29th, 2012 at 9:53 am

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using Microsoft.Phone.UserData;

private void ButtonContacts_Click(object sender, RoutedEventArgs e)
{
    Contacts cons = new Contacts();

    //Identify the method that runs after the asynchronous search completes.
    cons.SearchCompleted += new EventHandler&lt;ContactsSearchEventArgs&gt;(Contacts_SearchCompleted);

    //Start the asynchronous search.
    cons.SearchAsync(String.Empty, FilterKind.None, "Contacts Test #1");
}

void Contacts_SearchCompleted(object sender, ContactsSearchEventArgs e)
{
    //Do something with the results.
    MessageBox.Show(e.Results.Count().ToString());
}

using Microsoft.Phone.UserData;

private void ButtonContacts_Click(object sender, RoutedEventArgs e)

{

Contacts cons = new Contacts();

//Identify the method that runs after the asynchronous search completes.

cons.SearchCompleted += new EventHandler<ContactsSearchEventArgs>(Contacts_SearchCompleted);

//Start the asynchronous search.

cons.SearchAsync(String.Empty, FilterKind.None, "Contacts Test #1");

}

void Contacts_SearchCompleted(object sender, ContactsSearchEventArgs e)

{

//Do something with the results.

MessageBox.Show(e.Results.Count().ToString());

}

How to launch a URL in wp7.

Thursday, June 28th, 2012 at 12:24 pm

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To launch a url you can use the WebBrowserTask in windows phone 7.

var wbt = new WebBrowserTask();
wbt.URL = "http://stackoverflow.com/";
wbt.Show();
You'll just need to add a reference to Microsoft.Phone.dll

var wbt = new WebBrowserTask();

wbt.URL = "http://stackoverflow.com/";

wbt.Show();

You'll just need to add a reference to Microsoft.Phone.dll

Dynamically change background color of a hyperlink button in WP7

Monday, June 25th, 2012 at 10:22 am

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The following code snippet allow you to change the background color of a hyperlink button in Windows Phone7 :

Dim scb As New SolidColorBrush()
scb.Color = Colors.Green
myHyperlinkButton.Background = scb

That’s it!

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Detecting device orientation in XNA in WP7

Friday, June 22nd, 2012 at 11:23 am

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Whenever our phone physically changes orientation, the GameWindow.OrientationChanged event gets raised.

So the code to check the CurrentOrientation property in your game would be like following:

if (Window.CurrentOrientation == DisplayOrientation.Portrait)

{

// add your code here..

}

if (Window.CurrentOrientation == DisplayOrientation.Portrait)

{

// add your code here..

}

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Script for sending email in Windows Phone app

Tuesday, June 12th, 2012 at 9:27 am

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The following script will help you to send email from your windows phone app:

EmailComposeTask emailComposeTask = new EmailComposeTask();
emailComposeTask.Subject = "Test Mail from my windows app";
emailComposeTask.To = Address.Text;
emailComposeTask.Body = Message.Text;
Message.Text = String.Empty;
emailComposeTask.Show();

EmailComposeTask emailComposeTask = new EmailComposeTask();

emailComposeTask.Subject = "Test Mail from my windows app";

emailComposeTask.To = Address.Text;

emailComposeTask.Body = Message.Text;

Message.Text = String.Empty;

emailComposeTask.Show();

EmailComposeTask emailComposeTask = new EmailComposeTask();
emailComposeTask.Subject = “Send To Me”;
emailComposeTask.To = Address.Text;
emailComposeTask.Body = Message.Text;
Message.Text = String.Empty;
emailComposeTask.Show();

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How to delete IsolatedStorageFile in WP7?

Thursday, May 31st, 2012 at 2:07 pm

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Below is the code for deleting IsolatedStorageFile in WP7:

public void DeleteTempFile(string fileName)
{
try
{
var storage = IsolatedStorageFile.GetUserStoreForApplication();
if (storage.DirectoryExists(“temp”) == false) return;

fileName = Path.Combine(“temp”, fileName);
if (storage.FileExists(fileName))
{
storage.DeleteFile(fileName);
}
}
catch (Exception) { }
}

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Formula to Convert CMYK to RGB values

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Setting polygon properties dynamically in WP7

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