syncfusion-winforms-metroform（同步融合 winform Metroform）

Implementing Syncfusion MetroForm

MetroForm is a Syncfusion Windows Forms control that provides modern Metro UI styling with flat appearance for desktop applications. It offers extensive customization options including caption bar labels, images, colors, borders, and advanced features like rounded corners (Windows 11+).

When to Use This Skill

Use this skill when you need to:

• Create modern, Metro-styled Windows Forms applications
• Customize window title bars with labels, images, and custom colors
• Replace standard Windows Forms with flat, modern appearance
• Add caption bar elements (labels, images, icons) to forms
• Customize form borders, colors, and caption bar height
• Implement custom painting on caption bars
• Handle mouse events for caption images
• Create rounded corner forms (Windows 11+)
• Build professional desktop applications with modern UI

Component Overview

MetroForm extends the standard Windows Forms Form class with:

• Modern Metro UI flat appearance
• Customizable caption bar with configurable height
• Support for caption labels and images
• Extensive color customization (borders, caption bar, buttons)
• Caption alignment options (horizontal and vertical)
• Custom brush effects for caption bar background
• Mouse event handling for caption images
• Rounded corners support (Windows 11+)
• Built-in theme support

Key Features

• Color Customization - Caption background, foreground, control box buttons, border colors
• Caption Elements - Add labels and images to the caption bar
• Help Button Support - Optional help button in title bar
• Right-to-Left Layout - RTL language support
• Flexible Alignment - Caption text and icon alignment options
• Custom Painting - Paint events for advanced caption bar customization
• Modern Appearance - Flat Metro style with optional rounded corners

Documentation and Navigation Guide

Getting Started

📄 Read: references/getting-started.md

Read this reference when you need to:

• Install and configure MetroForm for the first time
• Set up assembly references and NuGet packages
• Create a new project with MetroForm
• Convert existing Form to MetroForm
• Add basic caption labels and images
• Understand the initial setup workflow

Caption Customization

📄 Read: references/caption-customization.md

Read this reference when you need to:

• Add caption labels through designer or code
• Add caption images through designer or code
• Configure CaptionLabels collection
• Configure CaptionImages collection
• Customize label properties (font, color, size, text)
• Customize image properties (location, size, image resource)

Appearance and Styling

📄 Read: references/appearance-styling.md

Read this reference when you need to:

• Customize border thickness and color
• Set caption bar height and modes
• Change caption bar colors
• Align caption text (left, center, right)
• Align caption text vertically (top, center, bottom)
• Configure icon alignment
• Customize caption fore color and font
• Style caption buttons (color, hover color)

Advanced Customization

📄 Read: references/advanced-customization.md

Read this reference when you need to:

• Apply custom brushes to caption bar background
• Implement custom painting with CaptionBarPaint event
• Create gradient effects in caption bar
• Handle mouse events for caption images (MouseDown, MouseUp, MouseEnter, MouseLeave, MouseMove)
• Enable rounded corners (Windows 11+)
• Implement advanced visual effects

Quick Start

Step 1: Install Package

Install-Package Syncfusion.Shared.Base

Step 2: Add Assembly Reference

Add reference to:

• Syncfusion.Shared.Base.dll

Step 3: Configure Your Form

using Syncfusion.Windows.Forms;

namespace MyApplication
{
    // Inherit from MetroForm instead of Form
    public partial class MainForm : MetroForm
    {
        public MainForm()
        {
            InitializeComponent();

            // Basic configuration
            this.Text = "My Metro Application";
            this.CaptionBarHeight = 40;
            this.CaptionBarColor = Color.FromArgb(17, 158, 218);
            this.CaptionForeColor = Color.White;
            this.BorderColor = Color.FromArgb(17, 158, 218);
            this.BorderThickness = 2;
        }
    }
}

Imports Syncfusion.Windows.Forms

Namespace MyApplication
    ' Inherit from MetroForm instead of Form
    Public Partial Class MainForm
        Inherits MetroForm

        Public Sub New()
            InitializeComponent()

            ' Basic configuration
            Me.Text = "My Metro Application"
            Me.CaptionBarHeight = 40
            Me.CaptionBarColor = Color.FromArgb(17, 158, 218)
            Me.CaptionForeColor = Color.White
            Me.BorderColor = Color.FromArgb(17, 158, 218)
            Me.BorderThickness = 2
        End Sub
    End Class
End Namespace

Common Patterns

Pattern 1: Adding Caption Label

// Create and configure caption label
CaptionLabel captionLabel = new CaptionLabel();
captionLabel.Text = "Dashboard";
captionLabel.Font = new Font("Segoe UI", 10F, FontStyle.Regular);
captionLabel.ForeColor = Color.White;
captionLabel.Size = new Size(200, 24);

// Add to form
this.CaptionLabels.Add(captionLabel);

Pattern 2: Adding Caption Image with Click Handler

// Create and configure caption image
CaptionImage logoImage = new CaptionImage();
logoImage.Image = Properties.Resources.AppLogo;
logoImage.Location = new Point(10, 5);
logoImage.Size = new Size(32, 32);
logoImage.BackColor = Color.Transparent;

// Handle click event
logoImage.ImageMouseDown += (sender, e) =>
{
    MessageBox.Show("Logo clicked!");
};

// Add to form
this.CaptionImages.Add(logoImage);

Pattern 3: Custom Caption Bar Gradient

// Apply gradient brush to caption bar
this.CaptionBarBrush = new LinearGradientBrush(
    new Rectangle(0, 0, this.Width, this.CaptionBarHeight),
    Color.DarkBlue,
    Color.LightBlue,
    LinearGradientMode.Horizontal
);

// Optional: Custom paint event for more control
this.CaptionBarPaint += (sender, e) =>
{
    using (var brush = new LinearGradientBrush(
        e.ClipRectangle,
        Color.DarkBlue,
        Color.LightBlue,
        LinearGradientMode.Horizontal))
    {
        e.Graphics.FillRectangle(brush, e.ClipRectangle);
    }
};

Pattern 4: Rounded Corners (Windows 11+)

// Enable rounded corners (Windows 11 only)
this.AllowRoundedCorners = true;
this.BorderColor = Color.FromArgb(17, 158, 218);

Key Properties

Caption Bar Properties

• CaptionBarHeight - Height of the caption bar (default varies)
• CaptionBarColor - Background color of caption bar
• CaptionForeColor - Text color in caption bar
• CaptionFont - Font for caption text
• CaptionAlign - Horizontal alignment (Left, Center, Right)
• CaptionVerticalAlignment - Vertical alignment (Top, Center, Bottom)
• CaptionBarHeightMode - Height behavior on maximize

Border Properties

• BorderColor - Color of the form border
• BorderThickness - Thickness of the border in pixels
• AllowRoundedCorners - Enable rounded corners (Windows 11+)

Button Properties

• CaptionButtonColor - Color of caption buttons (minimize, maximize, close)
• CaptionButtonHoverColor - Button color on hover

Collections

• CaptionLabels - Collection of CaptionLabel objects
• CaptionImages - Collection of CaptionImage objects

Icon Properties

• IconAlign - Alignment of form icon (Left, Center, Right)

Advanced Properties

• CaptionBarBrush - Custom brush for caption bar background

Common Use Cases

Use Case 1: Dashboard Application

Create a modern dashboard with custom branding in the caption bar:

this.Text = "Analytics Dashboard";
this.CaptionBarHeight = 50;
this.CaptionBarColor = Color.FromArgb(41, 128, 185);

// Add company logo
CaptionImage logo = new CaptionImage
{
    Image = Resources.CompanyLogo,
    Location = new Point(10, 10),
    Size = new Size(30, 30)
};
this.CaptionImages.Add(logo);

// Add title label
CaptionLabel title = new CaptionLabel
{
    Text = "Real-Time Analytics",
    Font = new Font("Segoe UI Semibold", 11F),
    ForeColor = Color.White
};
this.CaptionLabels.Add(title);

Use Case 2: Settings Dialog

Create a simple, clean settings dialog:

this.Text = "Settings";
this.CaptionBarHeight = 35;
this.CaptionBarColor = Color.FromArgb(52, 73, 94);
this.CaptionForeColor = Color.White;
this.BorderColor = Color.FromArgb(52, 73, 94);
this.BorderThickness = 1;
this.FormBorderStyle = FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.MinimizeBox = false;

Use Case 3: Main Application Window with Custom Appearance

Create a main window with gradient caption and custom controls:

// Gradient caption bar
this.CaptionBarBrush = new LinearGradientBrush(
    new Rectangle(0, 0, this.Width, this.CaptionBarHeight),
    Color.FromArgb(44, 62, 80),
    Color.FromArgb(52, 152, 219),
    LinearGradientMode.Horizontal
);

// Caption buttons
this.CaptionButtonColor = Color.White;
this.CaptionButtonHoverColor = Color.FromArgb(231, 76, 60);

// Add user info to caption
CaptionLabel userLabel = new CaptionLabel
{
    Text = "Welcome, John Doe",
    ForeColor = Color.White,
    Font = new Font("Segoe UI", 9F),
    Location = new Point(100, 10)
};
this.CaptionLabels.Add(userLabel);

Events

Caption Bar Events

• CaptionBarPaint - Raised when caption bar needs repainting (for custom drawing)

Caption Image Events (per image)

• ImageMouseDown - Mouse button pressed on caption image
• ImageMouseUp - Mouse button released on caption image
• ImageMouseEnter - Mouse enters caption image area
• ImageMouseLeave - Mouse leaves caption image area
• ImageMouseMove - Mouse moves within caption image area

Troubleshooting

Form Doesn't Show Metro Style

• Ensure you're inheriting from MetroForm, not Form
• Verify Syncfusion.Shared.Base.dll is referenced
• Check that the namespace Syncfusion.Windows.Forms is imported

Caption Labels/Images Not Visible

• Verify CaptionBarHeight is sufficient for the content
• Check that foreground colors contrast with caption bar color
• Ensure Size property is set appropriately

Rounded Corners Not Working

• Rounded corners only work on Windows 11+
• Set AllowRoundedCorners = true
• Note: Border and shadow are drawn by OS when rounded corners are enabled

Designer Errors

• Clean and rebuild the solution
• Restart Visual Studio
• Ensure NuGet packages are properly restored

Related Components

• Office2007Form - Office 2007 styled forms
• OfficeForm - Office styled forms with ribbon support
• Form - Standard Windows Forms (for comparison)

Additional Resources

• MetroForm API Reference
• Control Dependencies
• NuGet Installation Guide