Implementing WPF Gantt Control

Comprehensive guide for implementing the Syncfusion® Essential Gantt control for WPF applications. The Gantt control is an MS Project-like project management viewer with built-in grid, schedule, and resource assignment capabilities designed to help project managers develop plans, assign resources, track task progress, and manage project timelines.

When to Use This Skill

Use this skill when you need to:

• Implement project management features in WPF applications
• Visualize task timelines with Gantt chart representations
• Create task hierarchies with parent-child relationships
• Configure task dependencies with predecessor/successor relationships
• Enable drag-and-drop for task scheduling and date adjustments
• Track project progress with baselines and progress indicators
• Manage resources and assign them to tasks
• Customize Gantt visuals with custom nodes, tooltips, and styles
• Import/export project data from/to XML format
• Implement zooming and timeline navigation
• Add filtering and sorting for task management
• Support localization for international projects

This skill covers the complete Gantt control implementation from basic setup to advanced customization.

Component Overview

Architecture

The Essential Gantt control is composed of three main components:

1. GanttGrid - Table view displaying scheduled tasks with hierarchy and editable fields
2. GanttChart - Graphical representation showing task bars, milestones, and dependencies
3. ScheduleHeader - Timeline header for measuring and tracking progress

Key Capabilities

Task Management:

• Hierarchical task structure (parent/child tasks)
• Task properties (name, start/finish dates, duration, progress)
• Milestone support for target dates
• Task dependencies with connectors

Visual Features:

• Progress indicators showing completion percentage
• Custom node styles for different task types
• Highlighting and strip lines for visual emphasis
• Custom tooltips for detailed task information

Interactions:

• Drag to adjust task start/finish dates
• Drag-and-drop tasks within rows
• Automatic synchronization between grid and chart
• Zooming for different timeline scales

Data Operations:

• MVVM-compatible data binding
• ObservableCollection support
• XML import/export for project data
• Filtering and sorting capabilities
• Data virtualization for large projects

Documentation and Navigation Guide

Getting Started

📄 Read: references/getting-started.md

When you need to:

• Install and set up the Gantt control in your WPF project
• Understand the Gantt control architecture and components
• Add GanttControl programmatically or through XAML designer
• Configure basic properties (ChartWidth, GridWidth)
• Set schedule types and range padding
• Configure auto-expand modes for task hierarchy
• Apply themes to the Gantt control

Topics covered: Installation, control structure, class diagram, basic configuration, schedule types, auto-expand modes, theming

Data Binding & Task Management

📄 Read: references/data-binding.md

When you need to:

• Create TaskDetails collections for project data
• Bind data to GanttControl ItemsSource
• Implement ViewModel pattern with ObservableCollection
• Define task properties (ID, name, dates, progress)
• Create parent-child task hierarchies
• Configure external property binding
• Assign resources to tasks
• Follow data model best practices

Topics covered: TaskDetails binding, ObservableCollection, task properties, hierarchy creation, resource assignment, MVVM patterns

Scheduling & Time Management

📄 Read: references/task-scheduling.md

When you need to:

• Configure schedule types (Hours, Days, Weeks, Months, Years)
• Implement custom DateTime or numeric schedules
• Customize calendars with working days and business hours
• Define holidays and non-working days
• Set schedule range padding for better visualization
• Implement zooming functionality
• Show date with time in GanttGrid
• Manage timeline and schedule views

Topics covered: Schedule types, calendar customization, holidays, zooming, timeline management, schedule configuration

Task Relationships & Dependencies

📄 Read: references/task-relationships.md

When you need to:

• Create dependency relationships between tasks
• Configure predecessor and successor tasks
• Implement connectors for visual dependencies
• Enable auto-update hierarchy for cascading changes
• Add baseline support for tracking original schedules
• Track task progress against baselines
• Implement milestones for project targets
• Define different relationship types

Topics covered: Dependencies, connectors, auto-update hierarchy, baselines, milestones, relationship types, progress tracking

Visual Customization

📄 Read: references/customization.md

When you need to:

• Apply custom node styles for different task types
• Create custom tooltips with rich task information
• Highlight specific tasks for emphasis
• Add strip lines as visual guides on the timeline
• Customize DateTime indicators
• Style header nodes and task nodes
• Customize progress indicators
• Apply visual themes and templates
• Implement conditional styling

Topics covered: Custom node styles, tooltips, highlighting, strip lines, DateTime indicators, themes, templates, conditional styling

Interactions & Drag-Drop

📄 Read: references/drag-drop-interaction.md

When you need to:

• Enable drag support for adjusting task dates
• Implement task bar dragging to change start/finish dates
• Configure drag-and-drop for task reordering
• Handle automatic data synchronization during drag operations
• Respond to drag events
• Configure drag behavior and constraints
• Implement custom drag validation

Topics covered: Drag to resize, drag-and-drop reordering, event handling, synchronization, drag constraints

Data Operations

📄 Read: references/data-operations.md

When you need to:

• Filter tasks based on criteria
• Sort task lists by various properties
• Implement data virtualization for large projects
• Import project data from XML files
• Export project data to XML format
• Perform bulk operations on tasks
• Search and filter task collections
• Optimize performance with large datasets

Topics covered: Filtering, sorting, virtualization, XML import/export, bulk operations, search, performance optimization

Resource Management

📄 Read: references/resource-management.md

When you need to:

• Implement resource view in Gantt
• Configure Gantt inline items for resources
• Assign resources to tasks
• Create and manage resource collections
• Track resource allocation across tasks
• Implement multi-resource task assignments
• Display resource information in the chart

Topics covered: Resource views, inline items, resource assignment, collections, allocation tracking, multi-resource tasks

Localization & Internationalization

📄 Read: references/localization.md

When you need to:

• Configure flow direction (LTR/RTL) for different languages
• Implement localization support
• Apply culture-specific formatting
• Manage multi-language resources
• Format dates and times by locale
• Localize resource strings and UI text
• Support international project teams

Topics covered: Flow direction, localization, culture formatting, multi-language resources, date/time formatting, resource strings

Quick Start Example

Basic Gantt Control Implementation

Here's a minimal example to get started with the Gantt control:

XAML:

<Window x:Class="GanttDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:syncfusion="http://schemas.syncfusion.com/wpf"
        Title="Project Management" Height="600" Width="1000">
    
    <syncfusion:GanttControl x:Name="ganttControl"
                             ItemsSource="{Binding TaskDetails}"
                             GridWidth="300"
                             ChartWidth="700">
        <syncfusion:GanttControl.DataContext>
            <local:ViewModel/>
        </syncfusion:GanttControl.DataContext>
    </syncfusion:GanttControl>
    
</Window>

ViewModel (C#):

using System;
using System.Collections.ObjectModel;
using Syncfusion.Windows.Controls.Gantt;

public class ViewModel
{
    public ObservableCollection<TaskDetails> TaskDetails { get; set; }

    public ViewModel()
    {
        TaskDetails = new ObservableCollection<TaskDetails>();
        
        // Create parent task
        var parentTask = new TaskDetails
        {
            TaskId = 1,
            TaskName = "Project Planning",
            StartDate = new DateTime(2024, 1, 1),
            FinishDate = new DateTime(2024, 1, 15),
            Progress = 40d
        };
        
        // Add child tasks
        parentTask.Child.Add(new TaskDetails
        {
            TaskId = 2,
            TaskName = "Define project scope",
            StartDate = new DateTime(2024, 1, 1),
            FinishDate = new DateTime(2024, 1, 5),
            Progress = 100d
        });
        
        parentTask.Child.Add(new TaskDetails
        {
            TaskId = 3,
            TaskName = "Gather requirements",
            StartDate = new DateTime(2024, 1, 6),
            FinishDate = new DateTime(2024, 1, 10),
            Progress = 50d
        });
        
        TaskDetails.Add(parentTask);
    }
}

Result: A functional Gantt control displaying project tasks with hierarchical structure, progress tracking, and timeline visualization.

Common Patterns

Pattern 1: Task Dependency Setup

// Create tasks with dependencies
var task1 = new TaskDetails 
{ 
    TaskId = 1, 
    TaskName = "Design", 
    StartDate = new DateTime(2024, 1, 1),
    FinishDate = new DateTime(2024, 1, 10)
};

var task2 = new TaskDetails 
{ 
    TaskId = 2, 
    TaskName = "Development",
    StartDate = new DateTime(2024, 1, 11),
    FinishDate = new DateTime(2024, 1, 25)
};

// Task2 depends on Task1 (Finish-to-Start)
task2.Predecessor.Add(new Predecessor { GanttTaskIndex = 1, GanttTaskRelationship = GanttTaskRelationship.FinishToStart });

TaskDetails.Add(task1);
TaskDetails.Add(task2);

Pattern 2: Resource Assignment

// Define resources
var resources = new ObservableCollection<Resource>
{
    new Resource { ID = 1, Name = "John Smith" },
    new Resource { ID = 2, Name = "Jane Doe" }
};

// Assign resources to task
var task = new TaskDetails
{
    TaskId = 1,
    TaskName = "Implementation",
    StartDate = new DateTime(2024, 1, 1),
    FinishDate = new DateTime(2024, 1, 15),
    Resources = resources
};

Pattern 3: Custom Schedule Type

<syncfusion:GanttControl x:Name="ganttControl"
                         ItemsSource="{Binding TaskDetails}"
                         ScheduleType="WeekWithDays"
                         ScheduleRangePadding="5">
</syncfusion:GanttControl>

// Or in code-behind
ganttControl.ScheduleType = ScheduleType.WeekWithDays;
ganttControl.ScheduleRangePadding = 5;

Pattern 4: Baseline Comparison

// Enable baseline support
var task = new TaskDetails
{
    TaskId = 1,
    TaskName = "Project Phase 1",
    StartDate = new DateTime(2024, 1, 1),
    FinishDate = new DateTime(2024, 2, 1),
    BaselineStart = new DateTime(2024, 1, 1),
    BaselineFinish = new DateTime(2024, 1, 25),  // Original plan
    Progress = 60d
};
// Actual finish extends beyond baseline - shows delay

Key Properties & API

Essential Properties

TaskDetails Properties

Common Methods

• ExpandAll() - Expand all task nodes
• CollapseAll() - Collapse all task nodes
• ExportToXML() - Export project to XML file
• ImportFromXML() - Import project from XML file

Architecture Overview

┌─────────────────────────────────────────────────────────────┐
│                      GanttControl                            │
├─────────────────────────────────────────────────────────────┤
│                                                               │
│  ┌──────────────────────┐  ┌─────────────────────────────┐ │
│  │    GanttGrid         │  │   GanttChartVisualControl   │ │
│  │  ┌────────────────┐  │  │  ┌────────────────────────┐ │ │
│  │  │ Header         │  │  │  │  ScheduleHeader        │ │ │
│  │  ├────────────────┤  │  │  ├────────────────────────┤ │ │
│  │  │ Parent Task    │  │  │  │  ═══╗                  │ │ │
│  │  │  ├─ Child 1    │  │  │  │     ║═══════           │ │ │
│  │  │  └─ Child 2    │  │  │  │          ║═════════════║ │ │
│  │  │ Parent Task    │  │  │  │  ═══════════╗          │ │ │
│  │  │  ├─ Child 3    │  │  │  │            ║════       │ │ │
│  │  └────────────────┘  │  │  └────────────────────────┘ │ │
│  └──────────────────────┘  └─────────────────────────────┘ │
│                                                               │
│         Data: ObservableCollection<TaskDetails>              │
└─────────────────────────────────────────────────────────────┘

Common Use Cases

1. Software Project Management - Track development sprints, tasks, and milestones
2. Construction Planning - Manage construction phases, dependencies, and resources
3. Event Planning - Schedule event tasks, timelines, and resource allocation
4. Research Projects - Track research phases, experiments, and deliverables
5. Manufacturing Scheduling - Plan production tasks, dependencies, and resources
6. Marketing Campaigns - Manage campaign tasks, timelines, and team assignments