How to create Silverlight Rich Text Box using Visual Studio 2010

Article

In this article we will be seeing how to create Silverlight Rich Text Box using Visual studio 2010.

Steps Involved:

Creating a Silverlight Application:

I. Open Visual Studio 2010.

ii. Go to File => New => Project.

iii. Select Silverlight from the Installed templates and choose the Silverlight Application template.

iv. Enter the Name and choose the location.

v. Click OK.

vi. In the New Silverlight Application wizard check the "Host the Silverlight Application in a new Web site".

vii. Click OK.

Creating the UI for the Rich Text Box:

I. Open MainPage.xaml file and replace the code with the following.

<UserControl x:Class="SilverlightRichTextBox.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="310">

</StackPanel>
<RichTextBox x:Name="myRTB" Canvas.Left="30" Canvas.Top="80" HorizontalAlignment="Left" VerticalAlignment="Top" Width="251" Height="187" Grid.Row="1" />

</Canvas>
</UserControl>

Functionalities performed by the Rich Text Box:

I. Right alignment.

ii. Left Alignment.

iii. Center Alignment.

iv. Justify.

v. Bold.

vi. Italic.

vii. Underline.

viii. Font Family.

ix. Font Sizes.

x. Font Color.

xi. Cut.

xii. Copy.

xiii. Paste.

Right Alignment:

#region Right Alignment

        Private void btnLAlignClick_Click(object sender, RoutedEventArgs e)
        {
            BlockCollection myBC = myRTB.Blocks;

            foreach (Block bl in myBC)
            {
                bl.TextAlignment = TextAlignment.Left;
            }
        }
        #endregion

Left Alignment:

        #region Left Alignment

        private void btnRAlignClick_Click (object sender, RoutedEventArgs e)
        {
            BlockCollection myBC = myRTB.Blocks;
            foreach (Block bl in myBC)
            {
                bl.TextAlignment = TextAlignment.Right;
            }

        }
        #endregion

Center Alignment:

#region Center Alignment
        private void btnCAlignClick_Click(object sender, RoutedEventArgs e)
        {
            BlockCollection myBC = myRTB.Blocks;
            foreach (Block bl in myBC)
            {
                bl.TextAlignment = TextAlignment.Center;
            }
        }
        #endregion

Justify:

   #region Justify
        private void btnJustifyClick_Click(object sender, RoutedEventArgs e)
        {
            BlockCollection myBC = myRTB.Blocks;
            foreach (Block bl in myBC)
            {
                bl.TextAlignment = TextAlignment.Justify;
            }
        }
        #endregion

Bold:

    #region Bold
        private void btnBold_Click(object sender, RoutedEventArgs e)
        {
            if (myRTB != null)
            {
                if (myRTB.Selection.GetPropertyValue(Run.FontWeightProperty) is FontWeight && ((FontWeight)myRTB.Selection.GetPropertyValue(Run.FontWeightProperty)) == FontWeights.Normal)
                    myRTB.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Bold);
                else
                    myRTB.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Normal);
            }
        }
        #endregion
Italic:

#region Italic
        private void btnItalic_Click(object sender, RoutedEventArgs e)
        {
            if (myRTB != null)
            {
                if (myRTB.Selection.GetPropertyValue(Run.FontStyleProperty) is FontStyle && ((FontStyle)myRTB.Selection.GetPropertyValue(Run.FontStyleProperty)) == FontStyles.Normal)
                    myRTB.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Italic);
                else
                    myRTB.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Normal);
            }
        }
        #endregion

Underline:

    #region Underline
        private void btnUnderline_Click(object sender, RoutedEventArgs e)
        {
            if (myRTB != null)
            {
                if (myRTB.Selection.GetPropertyValue(Run.TextDecorationsProperty) == null)
                    myRTB.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, TextDecorations.Underline);
                else
                    myRTB.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, null);
            }
        }
        #endregion

Font Family:

#region Font Family
        private void cmbFonts_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (myRTB != null)
            {
                myRTB.Selection.ApplyPropertyValue(Run.FontFamilyProperty,
        new FontFamily((cmbFonts.SelectedItem as ComboBoxItem).Tag.ToString()));
            }
        }
        #endregion

Font Sizes:

#region Font Sizes
        private void cmbFontSizes_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (myRTB != null)
            {
                myRTB.Selection.ApplyPropertyValue(Run.FontSizeProperty, Double.Parse((cmbFontSizes.SelectedItem as ComboBoxItem).Tag.ToString()));
            }
        }
        #endregion

Font Color:

   #region Font Colors
        private void cmbFontColors_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (myRTB != null)
            {
                string color = (cmbFontColors.SelectedItem as ComboBoxItem).Tag.ToString();

                SolidColorBrush brush = new SolidColorBrush(Color.FromArgb(
                    byte.Parse(color.Substring(0, 2), System.Globalization.NumberStyles.HexNumber),
                    byte.Parse(color.Substring(2, 2), System.Globalization.NumberStyles.HexNumber),
                    byte.Parse(color.Substring(4, 2), System.Globalization.NumberStyles.HexNumber),
                    byte.Parse(color.Substring(6, 2), System.Globalization.NumberStyles.HexNumber)));
                myRTB.Selection.ApplyPropertyValue(Run.ForegroundProperty, brush);
            }
        }

#endregion

Cut:

      #region Cut
        private void btnCut_Click(object sender, RoutedEventArgs e)
        {
            Clipboard.SetText(myRTB.Selection.Text);
            myRTB.Selection.Text = "";
        }
        #endregion

Copy:

      #region Copy
        private void btnCopy_Click(object sender, RoutedEventArgs e)
        {
            Clipboard.SetText(myRTB.Selection.Text);
        }
        #endregion

Paste:

     #region Paste
        private void btnPaste_Click(object sender, RoutedEventArgs e)
        {
            myRTB.Selection.Text = Clipboard.GetText();
        }
        #endregion

Testing the solution:

I. Build the solution.

ii. Hit ctrl+F5.

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