Populating with data

Updated over 6 months ago

This article will demonstrate how to define shapes and connections programmatically and how to load predefined layout by XML.

Adding items in code behind

Below you can find a code snippet which creates three shapes and connections between them:

C#

    
RadDiagramShape shape1 = new RadDiagramShape()
{
    Text = "Second Level Domain",
    ElementShape = new RoundRectShape(4),
    BackColor = Color.LimeGreen
};
shape1.Position = new Telerik.Windows.Diagrams.Core.Point(100, 100);
radDiagram1.Items.Add(shape1);
    
RadDiagramShape shape2 = new RadDiagramShape()
{
    Text = "Top Level Domain",
    ElementShape = new RoundRectShape(50),
    BackColor = Color.Cyan
};
shape2.Position = new Telerik.Windows.Diagrams.Core.Point(400, 100);
radDiagram1.Items.Add(shape2);
    
RadDiagramShape shape3 = new RadDiagramShape()
{
    Text = "Organization Domain",
    ElementShape = new RoundRectShape(20),
    BackColor = Color.Yellow
};
shape3.Position = new Telerik.Windows.Diagrams.Core.Point(400, 400);
radDiagram1.Items.Add(shape3);
            
RadDiagramConnection connection1 = new RadDiagramConnection()
{ Name = "connection1" };
connection1.Source = shape1;
connection1.Target = shape2;
radDiagram1.Items.Add(connection1);
    
RadDiagramConnection connection2 = new RadDiagramConnection()
{
    Name = "connection2"
};
connection2.Source = shape1;
connection2.Target = shape3;
radDiagram1.Items.Add(connection2);

VB.NET

Dim shape1 As New RadDiagramShape() With { _
    .Text = "Second Level Domain", _
    .ElementShape = New RoundRectShape(4), _
    .BackColor = Color.LimeGreen _
}
shape1.Position = New Telerik.Windows.Diagrams.Core.Point(100, 100)
RadDiagram1.Items.Add(shape1)
Dim shape2 As New RadDiagramShape() With { _
    .Text = "Top Level Domain", _
    .ElementShape = New RoundRectShape(50), _
    .BackColor = Color.Cyan _
}
shape2.Position = New Telerik.Windows.Diagrams.Core.Point(400, 100)
RadDiagram1.Items.Add(shape2)
Dim shape3 As New RadDiagramShape() With { _
    .Text = "Organization Domain", _
    .ElementShape = New RoundRectShape(20), _
    .BackColor = Color.Yellow _
}
shape3.Position = New Telerik.Windows.Diagrams.Core.Point(400, 400)
RadDiagram1.Items.Add(shape3)
Dim connection1 As New RadDiagramConnection() With { _
    .Name = "connection1" _
}
connection1.Source = shape1
connection1.Target = shape2
RadDiagram1.Items.Add(connection1)
Dim connection2 As New RadDiagramConnection() With { _
    .Name = "connection2" _
}
connection2.Source = shape1
connection2.Target = shape3
RadDiagram1.Items.Add(connection2)

Load items from XML

You can load items in RadDiagram from XML. Here is a sample code snippet:

C#

            
OpenFileDialog openFileDialog1 = new OpenFileDialog();
            
openFileDialog1.InitialDirectory = "c:\\";
openFileDialog1.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*";            
openFileDialog1.RestoreDirectory = true;
            
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
    string filename = openFileDialog1.FileName;
        
    string filelines = File.ReadAllText(filename);
    try
    {
        radDiagram1.DiagramElement.Items.Clear();
        radDiagram1.DiagramElement.Load(filelines);
    }
    catch (Exception ex)
    {
        MessageBox.Show("Unable to load " + filename + "\nError: " + ex.Message);
    }
}

VB.NET

Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.InitialDirectory = "c:\"
openFileDialog1.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*"
openFileDialog1.RestoreDirectory = True
If openFileDialog1.ShowDialog() = DialogResult.OK Then
    Dim filename As String = openFileDialog1.FileName
    Dim filelines As String = File.ReadAllText(filename)
    Try
        RadDiagram1.DiagramElement.Items.Clear()
        RadDiagram1.DiagramElement.Load(filelines)
    Catch ex As Exception
        MessageBox.Show((Convert.ToString("Unable to load ") & filename) + vbLf & "Error: " + ex.Message)
    End Try
End If

RadDiagramRibbonBar introduces UI for save to XML and load from XML functionality. In the code behind you can use the DiagramElement. Load and DiagramElement. Save methods.

Here is a sample xml file for storing two shapes and a connection between them:

XML

<?xml version="1.0" encoding="utf-8"?>
<RadDiagram Version="2015.1">
  <Metadata Type="Telerik.WinControls.UI.RadDiagramElement" Id="42311b7f-35b5-49a5-b92b-6d149d8bcf4d" Position="0;0">
    <Title>Diagram [4/6/2015 4:30:25 PM]</Title>
    <Description></Description>
  </Metadata>
  <Groups />
  <Shapes QNs="Telerik.WinControls.RadDiagram, Version=2015.1.331.40, Culture=neutral, PublicKeyToken=5bb2a467cbec794e;">
    <RadDiagramShape Type="Telerik.WinControls.UI.RadDiagramShape" Id="b44facd3-cddb-43d7-a253-b66ba024567b" ZIndex="0" Position="150;136" Size="70;54" RotationAngle="0" MinWidth="0" MinHeight="0" MaxWidth="INF" MaxHeight="INF" UseDefaultConnectors="True" ElementShape="Telerik.WinControls.RoundRectShape|5" InternalElementColor="#25A0DA" ShapeText="" QN="0">
      <Connectors QNs="Telerik.WinControls.RadDiagram, Version=2015.1.331.40, Culture=neutral, PublicKeyToken=5bb2a467cbec794e;">
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Auto" Offset="0.5;0.5" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Left" Offset="0;0.5" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Top" Offset="0.5;0" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Right" Offset="1;0.5" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Bottom" Offset="0.5;1" Width="4" Height="4" QN="0" />
      </Connectors>
    </RadDiagramShape>
    <RadDiagramShape Type="Telerik.WinControls.UI.RadDiagramShape" Id="f4a29125-a536-42e1-aeb0-463f4cfb4571" ZIndex="0" Position="337;137" Size="70;54" RotationAngle="0" MinWidth="0" MinHeight="0" MaxWidth="INF" MaxHeight="INF" UseDefaultConnectors="True" ElementShape="Telerik.WinControls.EllipseShape" InternalElementColor="#25A0DA" ShapeText="" QN="0">
      <Connectors QNs="Telerik.WinControls.RadDiagram, Version=2015.1.331.40, Culture=neutral, PublicKeyToken=5bb2a467cbec794e;">
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Auto" Offset="0.5;0.5" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Left" Offset="0;0.5" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Top" Offset="0.5;0" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Right" Offset="1;0.5" Width="4" Height="4" QN="0" />
        <RadDiagramConnector Type="Telerik.WinControls.UI.Diagrams.RadDiagramConnector" Name="Bottom" Offset="0.5;1" Width="4" Height="4" QN="0" />
      </Connectors>
    </RadDiagramShape>
  </Shapes>
  <Connections QNs="Telerik.WinControls.RadDiagram, Version=2015.1.331.40, Culture=neutral, PublicKeyToken=5bb2a467cbec794e;">
    <RadDiagramConnection Type="Telerik.WinControls.UI.RadDiagramConnection" Id="eeea2872-f633-4038-8b39-77b3dcd0f8c1" ZIndex="0" Position="220;162" SourceConnectorPosition="Auto" TargetConnectorPosition="Auto" SourceCapType="None" TargetCapType="None" SourceCapSize="7;7" TargetCapSize="7;7" StartPoint="220;163" Source="b44facd3-cddb-43d7-a253-b66ba024567b" EndPoint="370;162" ConnectionType="Polyline" ConnectionPoints="" IsModified="False" QN="0" />
  </Connections>
</RadDiagram>

See Also

• DataBinding