Save the Diagram in the File System

The following article will demonstrate how you can save the RadDiagram in the file system and load it.

Save the Diagram to the File System and Load

Let's first configure our XAML. We'll keep it simple - two buttons for save and Load and a Diagram with one shape.

Example 1: RadDiagram with a single shape and two buttons for save and load

<Grid x:Name="LayoutRoot" Background="White"> 
    <Grid.RowDefinitions> 
        <RowDefinition Height="Auto" /> 
        <RowDefinition Height="*" /> 
    </Grid.RowDefinitions> 
    <telerik:RadDiagram Grid.Row="1" x:Name="diagram"> 
        <telerik:RadDiagramShape Width="100" Height="100" Position="100 100" Content="Shape" /> 
    </telerik:RadDiagram> 
 
    <StackPanel Orientation="Horizontal"> 
        <telerik:RadButton Content="Save To Storage" x:Name="SaveButton" Click="SaveButton_Click" /> 
        <telerik:RadButton Content="Load From Storage" x:Name="LoadButton" Click="LoadButton_Click" /> 
    </StackPanel> 
</Grid> 
In the code behind we are using the Click event handlers of our save/load buttons. On save, we use a SaveFileDialog to create a new file or overwrite an existing text file.

Then we use the RadDiagram.Save() method which returns a string with the serialized RadDiagram. Having this string, the final step is to use StreamWriter to write the string into the chosen file.

On Load, we open the created file using an OpenFileDialog and use the StreamReader and the RadDiagram.Load() method to load the serialized XML.

Example 2: The Save and Load handlers

public partial class MainWindow : Window 
{ 
    private string fileName; 
    public MainWindow() 
    { 
        InitializeComponent(); 
    } 
 
    private void SaveButton_Click(object sender, RoutedEventArgs e) 
    { 
        var dialog = new SaveFileDialog(); 
        dialog.Filter = "XML Files|*.xml|All Files|*.*"; 
        if (dialog.ShowDialog() == true) 
        { 
            using (Stream stream = dialog.OpenFile()) 
            { 
                this.fileName = dialog.FileName; 
                var serializationString = this.diagram.Save(); 
                var writer = new StreamWriter(stream); 
                writer.Write(serializationString); 
                writer.Flush(); 
            } 
        } 
    } 
 
    private void LoadButton_Click(object sender, RoutedEventArgs e) 
    { 
        var dialog = new OpenFileDialog(); 
        dialog.Filter = "XML Files|*.xml|All Files|*.*"; 
        dialog.ShowDialog(); 
        using (Stream stream = dialog.OpenFile()) 
        { 
            using (StreamReader reader = new StreamReader(stream)) 
            { 
                string serializedString = reader.ReadToEnd(); 
                this.diagram.Load(serializedString); 
            } 
        } 
    } 
} 
Partial Public Class MainWindow 
     Inherits Window 
       Private fileName As String 
       Public Sub New() 
           InitializeComponent() 
       End Sub 
 
    Private Sub SaveButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs) 
        Dim dialog = New SaveFileDialog() 
        dialog.Filter = "XML Files|*.xml|All Files|*.*" 
        If dialog.ShowDialog() = True Then 
            Using stream As Stream = dialog.OpenFile() 
                Me.fileName = dialog.FileName 
                Dim serializationString = Me.diagram.Save() 
                Dim writer = New StreamWriter(stream) 
                writer.Write(serializationString) 
                writer.Flush() 
            End Using 
        End If 
    End Sub 
 
    Private Sub LoadButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs) 
        Dim dialog = New OpenFileDialog() 
        dialog.Filter = "XML Files|*.xml|All Files|*.*" 
        dialog.ShowDialog() 
        Using stream As Stream = dialog.OpenFile() 
            Using reader As New StreamReader(stream) 
                Dim serializedString As String = reader.ReadToEnd() 
                Me.diagram.Load(serializedString) 
            End Using 
        End Using 
    End Sub 
End Class 

You can also replace the OpenFileDialog and SaveFileDialog with Telerik's RadOpenFileDialog and RadSaveFileDialog for a more consistent look.

See Also

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