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Customizing Group Row Header of Silverlight DataGrid

, 20 Jan 2011 CPOL
This article will definitely help you. Here, I will show you how to modify the XAML to add different content to create a multi level row group header too.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Data;
using DataGridDemo1.Providers;
using DataGridDemo1.Models;

namespace DataGridDemo1.ViewModels
{
    public class MainViewModel : INotifyPropertyChanged
    {
        private string searchKey;
        private PagedCollectionView employees;

        /// <summary>
        /// Gets or sets the employees.
        /// </summary>
        /// <value>The employees.</value>
        public PagedCollectionView Employees
        {
            get { return employees; }
            set
            {
                employees = value;
                OnPropertyChanged("Employees");
            }
        }

        public MainViewModel()
        {
            // Fetch the Employee Details from provider and set to Employees collection
            Employees = new PagedCollectionView(EmployeeProviders.GetEmployeeDetails());
        }

        /// <summary>
        /// Groups the name of the data by column.
        /// </summary>
        /// <param name="groupName">Name of the group.</param>
        public void GroupDataByColumnName(string groupName)
        {
            //Employees.GroupDescriptions.Clear();
            Employees.GroupDescriptions.Add(new PropertyGroupDescription(groupName));
        }

        /// <summary>
        /// Filters the data by search key.
        /// </summary>
        /// <param name="searchKey">The search key.</param>
        public void FilterDataBySearchKey(string searchKey)
        {
            this.searchKey = searchKey;
            Employees.Filter = null;
            Employees.Filter=new Predicate<object>(FilterRecords);
        }

        /// <summary>
        /// Filters the records.
        /// </summary>
        /// <param name="obj">The obj.</param>
        /// <returns></returns>
        private bool FilterRecords(object obj)
        {
            var employee = obj as Employee;

            return employee != null &&
                   (employee.Firstname.ToLower().IndexOf(searchKey) >= 0 ||
                    employee.Lastname.ToLower().IndexOf(searchKey) >= 0 ||
                    employee.City.ToLower().IndexOf(searchKey) >= 0 ||
                    employee.State.ToLower().IndexOf(searchKey) >= 0);
        }

        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

_ Kunal Chowdhury _
Technical Lead
India India
Kunal Chowdhury is a Microsoft "Client Development" MVP (Most Valuable Professional), a Codeproject Mentor, Telerik MVP, Nokia Developer Champion, Speaker in various Microsoft events, Author, passionate Blogger and a Software Engineer by profession.
 
He is currently working in an MNC located in India. He has a very good skill over XAML, C#, Silverlight, Windows Phone, WPF and Windows 8 (WinRT). He posts his findings, articles in his technical blog and CodeProject.
 
Technical Blog: http://www.kunal-chowdhury.com
Facebook: http://facebook.com/blog.kunal
Twitter : http://twitter.com/kunal2383
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