Events in Blazor Diagram Component

12 Dec 20245 minutes to read

Data Loaded

• The DataLoaded event is triggered when the diagram layout is rendered completely.

The following code example explains the data loaded event in the diagram.

@using Syncfusion.Blazor.Diagram

<SfDiagramComponent @ref="diagram" Width="100%" Height="600px" DataLoaded="@DataLoaded" NodeCreating="NodeCreating" ConnectorCreating="ConnectorCreating">
    <DataSourceSettings DataSource="DataSource" ID="Id" ParentID="Manager"></DataSourceSettings>
    <Layout @bind-Type="type" @bind-HorizontalSpacing="@HorizontalSpacing" @bind-FixedNode="@FixedNode" @bind-Orientation="@oreintation" @bind-VerticalSpacing="@VerticalSpacing" @bind-HorizontalAlignment="@horizontalAlignment" @bind-VerticalAlignment="@verticalAlignment">
        <LayoutMargin @bind-Top="@top" @bind-Bottom="@bottom" @bind-Right="@right" @bind-Left="@left"></LayoutMargin>
    </Layout>
    <SnapSettings></SnapSettings>
</SfDiagramComponent>

@code
{
    public SfDiagramComponent diagram;
    double top = 50;
    double bottom = 50;
    double right = 50;
    double left = 50;
    LayoutType type = LayoutType.OrganizationalChart;
    LayoutOrientation oreintation = LayoutOrientation.TopToBottom;
    HorizontalAlignment horizontalAlignment = HorizontalAlignment.Auto;
    VerticalAlignment verticalAlignment = VerticalAlignment.Auto;
    int HorizontalSpacing = 30;
    int VerticalSpacing = 30;
    private string FixedNode = null;
    public class HierarchicalDetails
    {
        public string Id { get; set; }
        public string Role { get; set; }
        public string Manager { get; set; }
        public string ChartType { get; set; }
        public string Color { get; set; }
    }
    public List<HierarchicalDetails> DataSource = new List<HierarchicalDetails>()
    {
            new HierarchicalDetails()   { Id= "parent", Role= "Board", Color= "#71AF17" },
            new HierarchicalDetails()   { Id= "1", Role= "General Manager", Manager= "parent", ChartType= "right", Color= "#71AF17" },
            new HierarchicalDetails()   { Id= "11", Role= "Assistant Manager", Manager= "1", Color= "#71AF17" },
            new HierarchicalDetails()   { Id= "2", Role= "Human Resource Manager", Manager= "1", ChartType= "right", Color= "#1859B7" },
            new HierarchicalDetails()   { Id= "3", Role= "Trainers", Manager= "2", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "4", Role= "Recruiting Team", Manager= "2", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "5", Role= "Finance Asst. Manager", Manager= "2", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "6", Role= "Design Manager", Manager= "1",ChartType= "right", Color= "#1859B7" },
            new HierarchicalDetails()   { Id= "7", Role= "Design Supervisor", Manager= "6", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "8", Role= "Development Supervisor", Manager= "6", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "9", Role= "Drafting Supervisor", Manager= "6", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "10", Role= "Operation Manager", Manager= "1", ChartType= "right", Color= "#1859B7" },
            new HierarchicalDetails()   { Id= "11", Role= "Statistic Department", Manager= "10", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "12", Role= "Logistic Department", Manager= "10", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "16", Role= "Marketing Manager", Manager= "1", ChartType= "right", Color= "#1859B7" },
            new HierarchicalDetails()   { Id= "17", Role= "Oversea sales Manager", Manager= "16", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "18", Role= "Petroleum Manager", Manager= "16", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "20", Role= "Service Dept. Manager", Manager= "16", Color= "#2E95D8" },
            new HierarchicalDetails()   { Id= "21", Role= "Quality Department", Manager= "16", Color= "#2E95D8" }

    };
    private void NodeCreating(IDiagramObject obj)
    {
        Node node = obj as Node;
        if (node.Data is System.Text.Json.JsonElement)
        {
            node.Data = System.Text.Json.JsonSerializer.Deserialize<HierarchicalDetails>(node.Data.ToString());
        }
        HierarchicalDetails hierarchicalData = node.Data as HierarchicalDetails;
        node.Width = 150;
        node.Height = 50;
        node.Style.Fill = hierarchicalData.Color;
        // node.IsVisible = false;
        node.Annotations = new DiagramObjectCollection<ShapeAnnotation>()
        {
            new ShapeAnnotation()
            {
                Content = hierarchicalData.Role,
                Style =new TextStyle(){Color = "white"}
            }
        };
    }
    private void ConnectorCreating(IDiagramObject connector)
    {
        (connector as Connector).Type = ConnectorSegmentType.Orthogonal;
        (connector as Connector).TargetDecorator.Shape = DecoratorShape.None;
    }
    private void DataLoaded(object args)
    {
        //Action to be performed.
    }
}

You can download a complete working sample from GitHub