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Silverlight with Free ASP.NET Hosting - HostForLIFE.eu :: How to Make Silverlight Overlay Notification

clock April 22, 2015 07:01 by author Rebecca

Most of us do not like applications that continuosly bothering with popup messages to make us aware that something happened. Sometimes, a message box coming up saying "Changes were saved succesfully" right after pressing the save button, this condition is so bothering because our work can be interrupted by the unimportant notification box. Maybe, we better would like to be told that it worked if it allows us to keep going or you'd better be told if something went wrong.

For example, during Christmas a lot of messages full of best wishes are going around. You can sent one of those to one friend and after a while an Overlay Notification appeared at the bottom of your screen saying "Message received by [contact]". So, in this post, I will tell you how to make that kind of notification in Silverlight which isn't keep bothering you while you were working on something.

Step 1

First, let us create a User Control. The control will be the already mentioned Overlay Notification. You canl make it appear and disappear after a while without user interaction. This could be the XAML code:

 <UserControl x:Class="SilverlightTestApp.Controls.OverlayNotification"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
   
    <UserControl.Resources>
        <Storyboard x:Name="ShowMessage" Completed="ShowMessage_Completed">
            <DoubleAnimation
            Duration="00:00:06"
            From="0.00"
            To="1.00"
            AutoReverse="True"
            Storyboard.TargetName="Popup"
            Storyboard.TargetProperty="Opacity"/>           
        </Storyboard>       
    </UserControl.Resources>
   
    <Grid x:Name="LayoutRoot" Background="White" HorizontalAlignment="Center" >
        <Border BorderBrush="Black" BorderThickness="1" MinWidth="150" MaxWidth="550" MaxHeight="75"
                   CornerRadius="4" Background="Transparent" Visibility="Collapsed" Opacity="0" x:Name="Popup">
            <TextBlock x:Name="lblMessage" HorizontalAlignment="Center" TextWrapping="Wrap" MaxWidth="400" MaxHeight="75"></TextBlock>
        </Border>
    </Grid>   

</UserControl>

Step 2

You have a Storyboard that will be triggered whenever you want to show the Notification. It will last 6 seconds (plus another 6 because of the AutoReverse=true). And will change the Opacity of our notification area to give the impression that it fades in and out.

Then you already had a Border with rounded corners. You'll have to make it visible whenever you want to show the message and hide it when the Storyboard is done. Inside of this Border, you will have a Textblock where your message will be displayed.

Let's take a look at the code behind:

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace SilverlightTestApp.Controls
{
    public partial class OverlayNotification : UserControl
    {
        private string _message;
        public string Message
        {
            get
            {
                return _message;
            }
            set
            {
                _message = value;
                lblMessage.Text = value;
                Popup.Visibility = Visibility.Visible;
                ShowMessage.Begin();
            }
        }

        private System.Windows.Media.Color _color;
        public System.Windows.Media.Color Color
        {
            get
            {
                return _color;
            }
            set
            {
                _color = value;
                var newBrush = new SolidColorBrush();
                newBrush.Color = value;
                lblMessage.Foreground = newBrush;
            }
        }

        public OverlayNotification()
        {
            InitializeComponent();
        }

        private void ShowMessage_Completed(object sender, System.EventArgs e)
        {
            Popup.Visibility = Visibility.Collapsed;
        }
    }
}

You will expose at least the Message property (you also have the Color property for the font). Notice that everytime you set the Message property we update the Textblock's text, make the Border visible and trigger the Storyboard. Also noticed that you can handle the Storyboard's completed event to hide the Border.

To use it, just add this new User Control into the view where you want to use it in the same way that you would place a Textbox or any other control:

<my:OverlayNotification x:Name="myOverlayNotification"/>

Then, whenever you want to show a Notification, just set the Message property with the message you want to display:

 myOverlayNotification.Color = Colors.Red;
 myOverlayNotification.Message = "This is a test notification";

Feel free to play around with it modifying the layout and appeareance of the control in the XAML or adding more properties to be able to customize it more, for example, adding a BackgroundColor property.

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Silverlight with Free ASP.NET Hosting - HostForLIFE.eu :: How to Create Simple Navigation in Silverlight ?

clock April 21, 2015 08:08 by author Peter

Navigation Framework is absolutely good however in some cases we have a tendency to don't need to use the Navigation Framework. This navigation technique may be used instead that provides simple Navigation. Add the following code in App.xaml:

private static Grid root    
public static void Navigate(UserControl newPage)
{
UserControl oldPage = root.Children[0] as UserControl;
root.Children.Add(newPage);
root.Children.Remove(oldPage);
}

Now, Edit the App.xaml as shown below:
Previous code: 
private void Application_Startup(object sender, StartupEventArgs e)
{
 this.RootVisual = new MainPage();
 }

Modified code:

private void Application_Startup(object sender, StartupEventArgs e)
{
root = new Grid();
root.Children.Add(new MainPage());
this.RootVisual = root;     
}


Create a new usercontrol NewPage . Add Button to the Page inorder to navigate to the home. equally produce a button within the MainPage.xaml as well inorder to navigate to the NewPage. within the Button Click event add the following code:
       App app = (App)Application.Current;
        App.Navigate(new NewPage());


Application.Current gets the System.Windows.Application object for this application. The new instance of the Page is passed to the Navigate method of App class. When we run the code we are able to navigate between the MainPage and also the NewPage.xaml.

 

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Silverlight 6 with Free ASP.NET Hosting - HostForLIFE.eu :: How to Create a Progress Bar while Uploading File

clock April 15, 2015 06:04 by author Rebecca

When you worked with Silverlight to create an GUI to let the user to upload the file, it is important to create a progress bar to make the user aware of the uploading progress.Today, I will show you how to create a progress bar while uploading a file.

Here is the sample of the progress bar that I've created:

Several resources can be obtained online, but the explaination is either not clear enough, or there are redundant codes confusing people. Here, the code is as simplest as possible, with the assumption that,
a) there is no connection lost between the client and the server during the process
b) there is no data corrupted during the transmission
c) small file size (can be edited)

Before we go with code, first you can observe that there are 4 UI components:
a) Browser button
b) Textbox shows file name (can be disabled)
c) Upload button
d) Progress bar + labels

Browser Button

Here's the code to create the browser button:

    OpenFileDialog dialog = new OpenFileDialog(); //OpenFileDialog will open a file dialog which allows the use to browser the wanted file.
    if ((bool)dialog.ShowDialog())
    {
          globalFileStream = dialog.File.OpenRead();
          ....
          ....
    }

Upload Button

An always updating progress bar means that, the upload progress has to be done 'Chunk' by 'Chunk'. To achieve this, we read the file stream 'Chunk' by 'Chunk and upload it.

Step 1 : Send First Chunck

    int steps = (int)(fileLength / (long)CHUNK_SIZE);
    progressBar1.Minimum = 0;               //set prograssbar info
    progressBar1.Maximum = steps;
    int read = 0;
    byte[] buffer = null;                                                                //buffer to store the file stream chunk by chunk
    if (globalFileStream.Length <= CHUNK_SIZE)                            //consider if the file size is smaller than the predefined chunk size
    {
          buffer = new byte[(int)globalFileStream.Length];
    }
    else
    {
          buffer = new byte[CHUNK_SIZE];
    }
    read = globalFileStream.Read(buffer, 0, buffer.Length);
    filePosition += read;
    myUpload.BeginUploadAsync(fileName, destinationFolder, buffer);       //begin upload the first chunk

Step 2: Sends second and subsequent chunk

    UpdateProgressBar(); //Update progress bar
    if (filePosition < fileLength)
    {
         int read = 0;
         int readSize = CHUNK_SIZE;
         byte[] buffer = null;
         long diff = fileLength - filePosition;
         if (diff < CHUNK_SIZE)
         {
               readSize = (int)diff;
         }
         buffer = new byte[readSize];
         globalFileStream.Seek(filePosition, SeekOrigin.Begin);
         read = globalFileStream.Read(buffer, 0, readSize);
         filePosition += read;
         myUpload.ContinueUploadAsync(theFileName, "here", buffer);

For your information, progress bar provided by Silverlight doesn't have the percentage displayed. Hence, I additionally put a label on top of the progress bar. The label contents are the percentage of the file stream sent to the server.

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Silverlight 6 with Free ASP.NET Hosting - HostForLIFE.eu :: How to Align Text in DataGrid Cell in Xaml and in Code Behind ?

clock April 14, 2015 07:46 by author Peter

Hi friends, in this short article I will tell you about How to Align Text in DataGrid Cell in Xaml and in Code Behind with Silverlight 6. First, take a look the following code:

DataGridTextColumn textColumn = new DataGridTextColumn();
textColumn.Header = "Result";
textColumn.Binding = new Binding("Result");
dataGrid1.Columns.Add(textColumn);

How I will set RESULT alignment right? Here is what you've got to try to to, I'll show you this in each ways that like doing it in Xaml Page and doing it in code behind. First add the style in your User control Resource:
<UserControl.Resources>
      <Style x:Key="AlignRight" TargetType="Data:DataGridCell">
          <Setter Property="HorizontalContentAlignment" Value="Right" />
     </Style>
</UserControl.Resources>

I'm doing this for Right Align however you'll be able to change it in keeping with your requirement. Next, the way to do this in Xaml Page? Its terribly straightforward, apply this style to whichever column you would like, like this:

<Data:DataGridTextColumn Header="Amount" Width="90" Binding="{Binding Amount}" IsReadOnly="True" CellStyle="{StaticResource AlignRight}"></Data:DataGridTextColumn>

Now how to do this in code behind:
DataGridTextColumn textColumn = new DataGridTextColumn();
textColumn.Header = "Result";
textColumn.Binding = new Binding("Result");
textColumn.CellStyle = Resources["AlignRight"] as Style;
dataGrid1.Columns.Add(textColumn);

Hope it works for you!

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Silverlight 6 Hosting Germany - HostForLIFE.eu :: Increase the Shadow Depth of a Button Control in Silverlight

clock February 24, 2015 06:42 by author Peter

In this article, I will write about Increase the Shadow Depth of a button control in Silverlight 6 when you clicked in a Silverlight app. As usual, open the visual studio and choose the Silverlight project. First allow us to drag a button from toolbox as shown below into MainPage.xaml.

Now, i'm about to write a button click event for this button. It means, we are able to see the animation impact once ever button is clicked.
<Button Content="ClickHere" Click="StartAnimation" Width="200" Margin="60">
        <Button.Effect>
            <DropShadowEffect x:Name="myDropShadowEffect" />
        </Button.Effect>          
</Button>

Now allow us to produce a storyboard as shown below. From the below code we will able to notice that the target name and the name of our button are same. ShadowDepth is assigned because the target property.
<Storyboard x:Name="myStoryboard">
                <DoubleAnimation
                Storyboard.TargetName="myDropShadowEffect"
                Storyboard.TargetProperty="ShadowDepth"
                To="30" Duration="0:0:0.5"
                AutoReverse="True" />
            </Storyboard>

We will write the storyboard begin method within the event "StartAnimation" in MainPage.xaml.cs as shown below.
private void StartAnimation(object sender, RoutedEventArgs args)
        {
            myStoryboard.Begin();
        }

And here is the code that I used:

MainPage.Xaml
<UserControl x:Class="SilverlightTest1.MainPage"
    xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentation
    xmlns:x=http://schemas.microsoft.com/winfx/2006/xaml
    xmlns:d=http://schemas.microsoft.com/expression/blend/2008
    xmlns:mc=http://schemas.openxmlformats.org/markup-compatibility/2006
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">
     <StackPanel>
         <StackPanel.Resources>
            <Storyboard x:Name="myStoryboard">
                <DoubleAnimation
                Storyboard.TargetName="myDropShadowEffect"
                Storyboard.TargetProperty="ShadowDepth"
                To="30" Duration="0:0:0.5"
                AutoReverse="True" />
            </Storyboard>
        </StackPanel.Resources>
        <Button Content="Click Here" Click="StartAnimation" Width="200"
            Margin="60">
            <Button.Effect>
                <DropShadowEffect x:Name="myDropShadowEffect" />
           </Button.Effect>         
        </Button>
    </StackPanel>
</UserControl>


MainPage.Xaml.cs
private void StartAnimation(object sender, RoutedEventArgs args)
        {
            myStoryboard.Begin();
        }

HostForLIFE.eu Silverlight 6 Hosting
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Silverlight 6 Hosting Netherlands - Cookie with JavaScript in Silverlight

clock February 10, 2015 15:24 by author Peter

Cookies are knowledge stored by the web browser, as easy as that. you'll be able to save something; yes I said anything, in cookies. I will conjointly do that through Silverlight itself, except for fun let's attempt doing it with JavaScript Silverlight 6. With this method we tend to follow, we'll be accessing JavaScript's function from Silverlight. This sometime becomes a headache for many developers.

The first step towards setting cookies through JavaScript, is to call the JavaScript function from Silverlight. Calling a JavaScript function from Silverlight is extremely straightforward. to know this, and more forthcoming things, produce a brand new Silverlight application "JavaScriptTweaks". Open JavaScriptTweaksTestpage.aspx, and add the subsequent code somewhere with <head> tag:
<script type="text/javascript">
    function SayHello()
   {
        alert("Hello!");
   }
</script>

Next step in the mainpage.cs inside the constructor add the code below:
HtmlPage.Window.Invoke("SayHello");
When you run the application, what you will see is a message box that pops up saying Hello at the very beginning of the app.

Now, we want to Setting the Cooking. Remove the SayHello function from the JavaScript. Write the following code:
function SetCookie(cookieName, cookieValue, Days)
{           
    var todayDate = new Date();
    var expireDate = new Date();
    if (Days == null || Days == 0) Days = 1;
    expire.setTime(todayDate.getTime() + 3600000 * 24 * Days);
    document.cookie = cookieName + ":" + cookieValue
    + ";expires=" + expireDate.toGMTString();          
}
Next step, call the function SetCookie with this code:
HtmlPage.Window.Invoke("SetCookie", "Name", "Peter", 5);


On the code above will call SetCookie function with the parameters cookieName "Name", cookieValue "Peter" and validity, in other words Days as "5". Line #5 of the function will set the expiry time period of cookies, which is in milliseconds and is about 432000000 for 5 days. Line #6 of the function will set the cookie's information like, its Name, Value and Expiry date. Our cookie is set to give information.

Now, we want to retrieve the information. Create three buttons in the XAML of the main page, 1 for each setcookie, getcookie and deletecookie.

Copy the function on the main page to the click event of the SetCookie Button.  And here is the code that I used:
function GetCookie(cookieName)
{
   var allcookies = document.cookie;
   // Get all the cookies in an array
   var cookiearray = allcookies.split(';');
   for (var i = 0; i < cookiearray.length; i++)
   {
       var nameOfCookie = cookiearray[i].split('=')[0];
       if (cookieName == nameOfCookie)
       {
           return cookiearray[i];
    }
 }
           return null;
}

Pass in the cookie name (which in our case is "Name") &  the function can return the entire cookie. On the GetCookie button select event and we should call this function. Write the following code:
private void ButtonGet_OnClick(object sender, RoutedEventArgs e)
{
    var cookie = HtmlPage.Window.Invoke("GetCookie", "Name");
    if (cookie == null)
    {
        MessageBox.Show("No cookie found");
        return;
    }
    MessageBox.Show(cookie.ToString().Split('=').LastOrDefault());
}

This will pop up a message box, showing the value of the cookie specified. Since I have my cookie as "name=Peter" it shows me "Peter".
Finally we want delete a cookie. You need to set the expiry date to a previous date. That can be done thorugh JavaScript's function as follows:
function DeleteCookie(cookieName)
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    document.cookie = cookieName + "=;expires=" + exp.toGMTString();
}
In the delete button click event call this function as:
private void ButtonDelete_OnClick(object sender, RoutedEventArgs e)
{
    HtmlPage.Window.Invoke("DeleteCookie", "Name");
}


Pass within the name of the cookie you wish to delete and bang! it'll be deleted. currently simply do this. Click on SetCookie, it'll set the cookie for you. now click on GetCookie to verify whether or not it did set a cookie or not, you ought to see the value of the cookie within the message box. Click on Deletecookie to delete the cookie. Finally click on Getcookie button once more, if everything worked fine then you ought to see a message within the message box saying: "No cookie found".

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About HostForLIFE

HostForLIFE is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2019 Hosting, ASP.NET 5 Hosting, ASP.NET MVC 6 Hosting and SQL 2019 Hosting.


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