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How to Change Combobox Column datasource based on another ComboboxColumn Value?

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GridView

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manoj savalia asked on 17 May 2012, 12:09 PM

hi,
I have One GridView. In My Gridview there are two Combobox columns like Country and State.
When I Change Country that time State will have to change.
In My simple application it work but in MVVM it does not work.
Please Help me.

My VIEW-MODEL Class Looks Like this:

using System;

using System.Net;

using System.Linq;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using System.Collections.ObjectModel;

//using SilverlightWithWCFService.ServiceReference1;

using Telerik.Windows.Controls;

using System.ComponentModel;

using System.Collections.Generic;

namespace SilverlightWithWCFService.Model

{

public class CustomerViewModel : INotifyPropertyChanged

{

private int cID;

public int CID

{

get

{

return this.cID;

}

set

{

this.cID = value;

this.OnPropertyChanged("CID");

CustromerList c = new CustromerList() { Country = CID };

StateList = c.AvailableState.ToList();

}

private ObservableCollection<CustromerList> objsearchList;

public ObservableCollection<CustromerList> objSearchList

{

get

{

return this.objsearchList;

}

set

{

this.objsearchList = value;

this.OnPropertyChanged("objSearchList");

}

List<Country> countryList = new List<Country>();

public List<Country> CountryList

{

get { return countryList; }

set

{

this.countryList = value;

this.OnPropertyChanged("CountryList");

}

List<State> stateList = new List<State>();

public List<State> StateList

{

get

{

CustromerList c = new CustromerList() { Country = CID };

stateList = c.AvailableState.ToList();

return stateList;

}

set

{

this.stateList = value;

this.OnPropertyChanged("StateList");

}

public CustomerViewModel()

{

countryList = AllLocations.Countries;

CountryList = countryList;

CID = 1;

objsearchList = new ObservableCollection<CustromerList>();

for (int i = 1; i <= 10; i++)

{

objsearchList.Add(new CustromerList()

{

CustomerID = i,

CompanyName = i.ToString(),

ContactName = i.ToString(),

Country = 1,

State = 1

});

objSearchList = objsearchList;

//SampleServiceClient client = new SampleServiceClient();

//client.CustomerListCompleted += new EventHandler<CustomerListCompletedEventArgs>(client_CustomerListCompleted);

//client.CustomerListAsync();

}

//void client_CustomerListCompleted(object sender, CustomerListCompletedEventArgs e)

//{

// objsearchList = new ObservableCollection<CustromerList>();

// foreach (Customer item in e.Result)

// {

// objsearchList.Add(new CustromerList()

// {

// CustomerID = item.CustomerName,

// CompanyName = item.CompanyName,

// ContactName = item.ContactName,

// Country = 1,

// State = 1

// });

// }

// objSearchList = objsearchList;

//}

void OnPropertyChanged(string property)

{

if (this.PropertyChanged != null)

this.PropertyChanged(this, new PropertyChangedEventArgs(property));

}

public event PropertyChangedEventHandler PropertyChanged;

}

#region Classes

public class Country

{

public int CountryID { get; set; }

public string CountryName { get; set; }

}

public class State

{

public int StateID { get; set; }

public string StateName { get; set; }

public int CountryID { get; set; }

}

public class CustromerList : INotifyPropertyChanged

{

private int customerID;

public int CustomerID

{

get

{

return this.customerID;

}

set

{

if (this.customerID != value)

{

this.customerID = value;

this.OnPropertyChanged("CustomerID");

}

private string companyName;

public string CompanyName

{

get

{

return this.companyName;

}

set

{

if (this.companyName != value)

{

this.companyName = value;

this.OnPropertyChanged("CompanyName");

}

private string contactName;

public string ContactName

{

get

{

return this.contactName;

}

set

{

if (this.contactName != value)

{

this.contactName = value;

this.OnPropertyChanged("ContactName");

}

private int country;

public int Country

{

get

{

return this.country;

}

set

{

if (this.country != value)

{

this.country = value;

this.OnPropertyChanged("Country");

this.State = null;

}

private int? state;

public int? State

{

get

{

return this.state;

}

set

{

if (this.state != value)

{

this.state = value;

this.OnPropertyChanged("State");

}

public IEnumerable<State> AvailableState

{

get

{

return from c in AllLocations.States

where c.CountryID == this.Country

select c;

}

void OnPropertyChanged(string property)

{

if (this.PropertyChanged != null)

this.PropertyChanged(this, new PropertyChangedEventArgs(property));

}

public event PropertyChangedEventHandler PropertyChanged;

}

public static class AllLocations

{

public static List<Country> Countries;

public static List<State> States;

static AllLocations()

{

Countries = new List<Country>();

Countries.Add(new Country() { CountryID = 1, CountryName = "Asia" });

Countries.Add(new Country() { CountryID = 2, CountryName = "Europe" });

Countries.Add(new Country() { CountryID = 3, CountryName = "Africa" });

Countries.Add(new Country() { CountryID = 4, CountryName = "Oceania" });

Countries.Add(new Country() { CountryID = 5, CountryName = "North America" });

Countries.Add(new Country() { CountryID = 6, CountryName = "South America" });

Countries.Add(new Country() { CountryID = 7, CountryName = "Antarctica" });

States = new List<State>();

States.Add(new State() { StateID = 1, CountryID = 1, StateName = "Afghanistan, Islamic Republicof" });

States.Add(new State() { StateID = 3, CountryID = 2, StateName = "Albania, Republic of" });

States.Add(new State() { StateID = 4, CountryID = 3, StateName = "Algeria, Peoples DemocraticRepublic of" });

States.Add(new State() { StateID = 5, CountryID = 4, StateName = "American Samoa" });

States.Add(new State() { StateID = 6, CountryID = 2, StateName = "Andorra, Principality of" });

States.Add(new State() { StateID = 7, CountryID = 3, StateName = "Angola, Republic of" });

States.Add(new State() { StateID = 8, CountryID = 5, StateName = "Anguilla" });

States.Add(new State() { StateID = 9, CountryID = 7, StateName = "Antarctica (the territory South of 60 deg S)" });

States.Add(new State() { StateID = 10, CountryID = 5, StateName = "Antigua and Barbuda" });

States.Add(new State() { StateID = 11, CountryID = 6, StateName = "Argentina, Argentine Republic" });

States.Add(new State() { StateID = 12, CountryID = 1, StateName = "Armenia, Republic of" });

States.Add(new State() { StateID = 13, CountryID = 5, StateName = "Aruba" });

States.Add(new State() { StateID = 14, CountryID = 4, StateName = "Australia, Commonwealth of" });

States.Add(new State() { StateID = 15, CountryID = 2, StateName = "Austria, Republic of" });

States.Add(new State() { StateID = 16, CountryID = 1, StateName = "Azerbaijan, Republic of" });

States.Add(new State() { StateID = 17, CountryID = 5, StateName = "Bahamas, Commonwealth of the" });

States.Add(new State() { StateID = 18, CountryID = 1, StateName = "Bahrain, Kingdom of" });

States.Add(new State() { StateID = 19, CountryID = 1, StateName = "Bangladesh, Peoples Republic of" });

States.Add(new State() { StateID = 20, CountryID = 5, StateName = "Barbados" });

States.Add(new State() { StateID = 21, CountryID = 2, StateName = "Belarus, Republic of" });

States.Add(new State() { StateID = 22, CountryID = 2, StateName = "Belgium, Kingdom of" });

States.Add(new State() { StateID = 23, CountryID = 5, StateName = "Belize" });

States.Add(new State() { StateID = 24, CountryID = 3, StateName = "Benin, Republic of" });

States.Add(new State() { StateID = 25, CountryID = 5, StateName = "Bermuda" });

States.Add(new State() { StateID = 26, CountryID = 1, StateName = "Bhutan, Kingdom of" });

States.Add(new State() { StateID = 27, CountryID = 6, StateName = "Bolivia, Republic of" });

States.Add(new State() { StateID = 28, CountryID = 2, StateName = "Bosnia and Herzegovina" });

States.Add(new State() { StateID = 29, CountryID = 3, StateName = "Botswana, Republic of" });

States.Add(new State() { StateID = 30, CountryID = 7, StateName = "Bouvet Island (Bouvetoya)" });

States.Add(new State() { StateID = 31, CountryID = 6, StateName = "Brazil, Federative Republic of" });

States.Add(new State() { StateID = 32, CountryID = 1, StateName = "British Indian Ocean Territory (Chagos Archipelago)" });

States.Add(new State() { StateID = 33, CountryID = 5, StateName = "British Virgin Islands" });

States.Add(new State() { StateID = 34, CountryID = 1, StateName = "Brunei Darussalam" });

States.Add(new State() { StateID = 35, CountryID = 2, StateName = "Bulgaria, Republic of" });

States.Add(new State() { StateID = 36, CountryID = 3, StateName = "Burkina Faso" });

States.Add(new State() { StateID = 37, CountryID = 3, StateName = "Burundi, Republic of" });

States.Add(new State() { StateID = 38, CountryID = 1, StateName = "Cambodia, Kingdom of" });

States.Add(new State() { StateID = 39, CountryID = 3, StateName = "Cameroon, Republic of" });

States.Add(new State() { StateID = 40, CountryID = 5, StateName = "Canada" });

States.Add(new State() { StateID = 41, CountryID = 3, StateName = "Cape Verde, Republic of" });

States.Add(new State() { StateID = 42, CountryID = 5, StateName = "Cayman Islands" });

States.Add(new State() { StateID = 43, CountryID = 3, StateName = "Central African Republic" });

States.Add(new State() { StateID = 44, CountryID = 3, StateName = "Chad, Republic of" });

States.Add(new State() { StateID = 45, CountryID = 6, StateName = "Chile, Republic of" });

States.Add(new State() { StateID = 46, CountryID = 1, StateName = "China, Peoples Republic of" });

States.Add(new State() { StateID = 47, CountryID = 1, StateName = "Christmas Island" });

States.Add(new State() { StateID = 48, CountryID = 1, StateName = "Cocos (Keeling) Islands" });

States.Add(new State() { StateID = 49, CountryID = 6, StateName = "Colombia, Republic of" });

States.Add(new State() { StateID = 50, CountryID = 3, StateName = "Comoros, Union of the" });

States.Add(new State() { StateID = 51, CountryID = 3, StateName = "Congo, Democratic Republic ofthe" });

States.Add(new State() { StateID = 52, CountryID = 3, StateName = "Congo, Republic of the" });

States.Add(new State() { StateID = 53, CountryID = 4, StateName = "Cook Islands" });

States.Add(new State() { StateID = 54, CountryID = 5, StateName = "Costa Rica, Republic of" });

States.Add(new State() { StateID = 55, CountryID = 3, StateName = "Cote d'Ivoire, Republic of" });

States.Add(new State() { StateID = 56, CountryID = 2, StateName = "Croatia, Republic of" });

States.Add(new State() { StateID = 57, CountryID = 5, StateName = "Cuba, Republic of" });

States.Add(new State() { StateID = 58, CountryID = 1, StateName = "Cyprus, Republic of" });

States.Add(new State() { StateID = 59, CountryID = 2, StateName = "Czech Republic" });

States.Add(new State() { StateID = 60, CountryID = 2, StateName = "Denmark, Kingdom of" });

States.Add(new State() { StateID = 61, CountryID = 3, StateName = "Djibouti, Republic of" });

States.Add(new State() { StateID = 62, CountryID = 5, StateName = "Dominica, Commonwealth of" });

States.Add(new State() { StateID = 63, CountryID = 5, StateName = "Dominican Republic" });

States.Add(new State() { StateID = 64, CountryID = 6, StateName = "Ecuador, Republic of" });

States.Add(new State() { StateID = 65, CountryID = 3, StateName = "Egypt, Arab Republic of" });

States.Add(new State() { StateID = 66, CountryID = 5, StateName = "El Salvador, Republic of" });

States.Add(new State() { StateID = 67, CountryID = 3, StateName = "Equatorial Guinea, Republic of" });

States.Add(new State() { StateID = 68, CountryID = 3, StateName = "Eritrea, State of" });

States.Add(new State() { StateID = 69, CountryID = 2, StateName = "Estonia, Republic of" });

States.Add(new State() { StateID = 70, CountryID = 3, StateName = "Ethiopia, Federal DemocraticRepublic of" });

States.Add(new State() { StateID = 71, CountryID = 2, StateName = "Faroe Islands" });

States.Add(new State() { StateID = 72, CountryID = 6, StateName = "Falkland Islands (Malvinas)" });

States.Add(new State() { StateID = 73, CountryID = 4, StateName = "Fiji, Republic of the Fiji Islands" });

States.Add(new State() { StateID = 74, CountryID = 2, StateName = "Finland, Republic of" });

States.Add(new State() { StateID = 75, CountryID = 2, StateName = "France, French Republic" });

States.Add(new State() { StateID = 76, CountryID = 6, StateName = "French Guiana" });

States.Add(new State() { StateID = 77, CountryID = 4, StateName = "French Polynesia" });

States.Add(new State() { StateID = 78, CountryID = 7, StateName = "French Southern Territories" });

States.Add(new State() { StateID = 79, CountryID = 3, StateName = "Gabon, Gabonese Republic" });

States.Add(new State() { StateID = 80, CountryID = 3, StateName = "Gambia, Republic of the" });

States.Add(new State() { StateID = 81, CountryID = 1, StateName = "Georgia" });

States.Add(new State() { StateID = 82, CountryID = 2, StateName = "Germany, Federal Republic of" });

States.Add(new State() { StateID = 83, CountryID = 3, StateName = "Ghana, Republic of" });

States.Add(new State() { StateID = 84, CountryID = 2, StateName = "Gibraltar" });

States.Add(new State() { StateID = 85, CountryID = 2, StateName = "Greece, Hellenic Republic" });

States.Add(new State() { StateID = 86, CountryID = 5, StateName = "Greenland" });

States.Add(new State() { StateID = 87, CountryID = 5, StateName = "Grenada" });

States.Add(new State() { StateID = 88, CountryID = 5, StateName = "Guadeloupe" });

States.Add(new State() { StateID = 89, CountryID = 4, StateName = "Guam" });

States.Add(new State() { StateID = 90, CountryID = 5, StateName = "Guatemala, Republic of" });

States.Add(new State() { StateID = 91, CountryID = 2, StateName = "Guernsey, Bailiwick of" });

States.Add(new State() { StateID = 92, CountryID = 3, StateName = "Guinea, Republic of" });

States.Add(new State() { StateID = 93, CountryID = 3, StateName = "Guinea-Bissau, Republic of" });

States.Add(new State() { StateID = 94, CountryID = 6, StateName = "Guyana, Co-operative Republicof" });

States.Add(new State() { StateID = 95, CountryID = 5, StateName = "Haiti, Republic of" });

States.Add(new State() { StateID = 96, CountryID = 7, StateName = "Heard Island and McDonald Islands" });

States.Add(new State() { StateID = 97, CountryID = 2, StateName = "Holy See (Vatican City State)" });

States.Add(new State() { StateID = 98, CountryID = 5, StateName = "Honduras, Republic of" });

States.Add(new State() { StateID = 99, CountryID = 1, StateName = "Hong Kong, Special Administrative Region of China" });

States.Add(new State() { StateID = 100, CountryID = 2, StateName = "Hungary, Republic of" });

States.Add(new State() { StateID = 101, CountryID = 2, StateName = "Iceland, Republic of" });

States.Add(new State() { StateID = 102, CountryID = 1, StateName = "India, Republic of" });

States.Add(new State() { StateID = 103, CountryID = 1, StateName = "Indonesia, Republic of" });

States.Add(new State() { StateID = 104, CountryID = 1, StateName = "Iran, Islamic Republic of" });

States.Add(new State() { StateID = 105, CountryID = 1, StateName = "Iraq, Republic of" });

States.Add(new State() { StateID = 106, CountryID = 2, StateName = "Ireland" });

States.Add(new State() { StateID = 107, CountryID = 2, StateName = "Isle of Man" });

States.Add(new State() { StateID = 108, CountryID = 1, StateName = "Israel, State of" });

States.Add(new State() { StateID = 109, CountryID = 2, StateName = "Italy, Italian Republic" });

States.Add(new State() { StateID = 110, CountryID = 5, StateName = "Jamaica" });

States.Add(new State() { StateID = 111, CountryID = 1, StateName = "Japan" });

States.Add(new State() { StateID = 112, CountryID = 2, StateName = "Jersey, Bailiwick of" });

States.Add(new State() { StateID = 113, CountryID = 1, StateName = "Jordan, Hashemite Kingdom of" });

States.Add(new State() { StateID = 114, CountryID = 1, StateName = "Kazakhstan, Republic of" });

States.Add(new State() { StateID = 115, CountryID = 3, StateName = "Kenya, Republic of" });

States.Add(new State() { StateID = 116, CountryID = 4, StateName = "Kiribati, Republic of" });

States.Add(new State() { StateID = 117, CountryID = 1, StateName = "Korea, Democratic People's Republic of" });

States.Add(new State() { StateID = 118, CountryID = 1, StateName = "Korea, Republic of" });

States.Add(new State() { StateID = 119, CountryID = 1, StateName = "Kuwait, State of" });

States.Add(new State() { StateID = 120, CountryID = 1, StateName = "Kyrgyz Republic" });

States.Add(new State() { StateID = 121, CountryID = 1, StateName = "Lao People's Democratic Republic" });

States.Add(new State() { StateID = 122, CountryID = 2, StateName = "Latvia, Republic of" });

States.Add(new State() { StateID = 123, CountryID = 1, StateName = "Lebanon, Lebanese Republic" });

States.Add(new State() { StateID = 124, CountryID = 3, StateName = "Lesotho, Kingdom of" });

States.Add(new State() { StateID = 125, CountryID = 3, StateName = "Liberia, Republic of" });

States.Add(new State() { StateID = 126, CountryID = 3, StateName = "Libyan Arab Jamahiriya" });

States.Add(new State() { StateID = 127, CountryID = 2, StateName = "Liechtenstein, Principality of" });

States.Add(new State() { StateID = 128, CountryID = 2, StateName = "Lithuania, Republic of" });

States.Add(new State() { StateID = 129, CountryID = 2, StateName = "Luxembourg, Grand Duchy of" });

States.Add(new State() { StateID = 130, CountryID = 1, StateName = "Macao, Special AdministrativeRegion of China" });

States.Add(new State() { StateID = 131, CountryID = 2, StateName = "Macedonia, Republic of" });

States.Add(new State() { StateID = 132, CountryID = 3, StateName = "Madagascar, Republic of" });

States.Add(new State() { StateID = 133, CountryID = 3, StateName = "Malawi, Republic of" });

States.Add(new State() { StateID = 134, CountryID = 1, StateName = "Malaysia" });

States.Add(new State() { StateID = 135, CountryID = 1, StateName = "Maldives, Republic of" });

States.Add(new State() { StateID = 136, CountryID = 3, StateName = "Mali, Republic of" });

States.Add(new State() { StateID = 137, CountryID = 2, StateName = "Malta, Republic of" });

States.Add(new State() { StateID = 138, CountryID = 4, StateName = "Marshall Islands, Republic ofthe" });

States.Add(new State() { StateID = 139, CountryID = 5, StateName = "Martinique" });

States.Add(new State() { StateID = 140, CountryID = 3, StateName = "Mauritania, Islamic Republicof" });

States.Add(new State() { StateID = 141, CountryID = 3, StateName = "Mauritius, Republic of" });

States.Add(new State() { StateID = 142, CountryID = 3, StateName = "Mayotte" });

States.Add(new State() { StateID = 143, CountryID = 5, StateName = "Mexico, United Mexican States" });

States.Add(new State() { StateID = 144, CountryID = 4, StateName = "Micronesia, Federated Statesof" });

States.Add(new State() { StateID = 145, CountryID = 2, StateName = "Moldova, Republic of" });

States.Add(new State() { StateID = 146, CountryID = 2, StateName = "Monaco, Principality of" });

States.Add(new State() { StateID = 147, CountryID = 1, StateName = "Mongolia" });

States.Add(new State() { StateID = 148, CountryID = 2, StateName = "Montenegro, Republic of" });

States.Add(new State() { StateID = 149, CountryID = 5, StateName = "Montserrat" });

States.Add(new State() { StateID = 150, CountryID = 3, StateName = "Morocco, Kingdom of" });

States.Add(new State() { StateID = 151, CountryID = 3, StateName = "Mozambique, Republic of" });

States.Add(new State() { StateID = 152, CountryID = 1, StateName = "Myanmar, Union of" });

States.Add(new State() { StateID = 153, CountryID = 3, StateName = "Namibia, Republic of" });

States.Add(new State() { StateID = 154, CountryID = 4, StateName = "Nauru, Republic of" });

States.Add(new State() { StateID = 155, CountryID = 1, StateName = "Nepal, State of" });

States.Add(new State() { StateID = 156, CountryID = 5, StateName = "Netherlands Antilles" });

States.Add(new State() { StateID = 157, CountryID = 2, StateName = "Netherlands, Kingdom of the" });

States.Add(new State() { StateID = 158, CountryID = 4, StateName = "New Caledonia" });

States.Add(new State() { StateID = 159, CountryID = 4, StateName = "New Zealand" });

States.Add(new State() { StateID = 160, CountryID = 5, StateName = "Nicaragua, Republic of" });

States.Add(new State() { StateID = 161, CountryID = 3, StateName = "Niger, Republic of" });

States.Add(new State() { StateID = 162, CountryID = 3, StateName = "Nigeria, Federal Republic of" });

States.Add(new State() { StateID = 163, CountryID = 4, StateName = "Niue" });

States.Add(new State() { StateID = 164, CountryID = 4, StateName = "Norfolk Island" });

States.Add(new State() { StateID = 165, CountryID = 4, StateName = "Northern Mariana Islands, Commonwealth of the" });

States.Add(new State() { StateID = 166, CountryID = 2, StateName = "Norway, Kingdom of" });

States.Add(new State() { StateID = 167, CountryID = 1, StateName = "Oman, Sultanate of" });

States.Add(new State() { StateID = 168, CountryID = 1, StateName = "Pakistan, Islamic Republic of" });

States.Add(new State() { StateID = 169, CountryID = 4, StateName = "Palau, Republic of" });

States.Add(new State() { StateID = 170, CountryID = 1, StateName = "Palestinian Territory, Occupied" });

States.Add(new State() { StateID = 171, CountryID = 5, StateName = "Panama, Republic of" });

States.Add(new State() { StateID = 172, CountryID = 4, StateName = "Papua New Guinea, IndependentState of" });

States.Add(new State() { StateID = 173, CountryID = 6, StateName = "Paraguay, Republic of" });

States.Add(new State() { StateID = 174, CountryID = 6, StateName = "Peru, Republic of" });

States.Add(new State() { StateID = 175, CountryID = 1, StateName = "Philippines, Republic of the" });

States.Add(new State() { StateID = 176, CountryID = 4, StateName = "Pitcairn Islands" });

States.Add(new State() { StateID = 177, CountryID = 2, StateName = "Poland, Republic of" });

States.Add(new State() { StateID = 178, CountryID = 2, StateName = "Portugal, Portuguese Republic" });

States.Add(new State() { StateID = 179, CountryID = 5, StateName = "Puerto Rico, Commonwealth of" });

States.Add(new State() { StateID = 180, CountryID = 1, StateName = "Qatar, State of" });

States.Add(new State() { StateID = 181, CountryID = 3, StateName = "Reunion" });

States.Add(new State() { StateID = 182, CountryID = 2, StateName = "Romania" });

States.Add(new State() { StateID = 183, CountryID = 2, StateName = "Russian Federation" });

States.Add(new State() { StateID = 184, CountryID = 3, StateName = "Rwanda, Republic of" });

States.Add(new State() { StateID = 185, CountryID = 5, StateName = "Saint Barthelemy" });

States.Add(new State() { StateID = 186, CountryID = 3, StateName = "Saint Helena" });

States.Add(new State() { StateID = 187, CountryID = 5, StateName = "Saint Kitts and Nevis, Federation of" });

States.Add(new State() { StateID = 188, CountryID = 5, StateName = "Saint Lucia" });

States.Add(new State() { StateID = 189, CountryID = 5, StateName = "Saint Martin" });

States.Add(new State() { StateID = 190, CountryID = 5, StateName = "Saint Pierre and Miquelon" });

States.Add(new State() { StateID = 191, CountryID = 5, StateName = "Saint Vincent and the Grenadines" });

States.Add(new State() { StateID = 192, CountryID = 4, StateName = "Samoa, Independent State of" });

States.Add(new State() { StateID = 193, CountryID = 2, StateName = "San Marino, Republic of" });

States.Add(new State() { StateID = 194, CountryID = 3, StateName = "Sao Tome and Principe, Democratic Republic of" });

States.Add(new State() { StateID = 195, CountryID = 1, StateName = "Saudi Arabia, Kingdom of" });

States.Add(new State() { StateID = 196, CountryID = 3, StateName = "Senegal, Republic of" });

States.Add(new State() { StateID = 197, CountryID = 2, StateName = "Serbia, Republic of" });

States.Add(new State() { StateID = 198, CountryID = 3, StateName = "Seychelles, Republic of" });

States.Add(new State() { StateID = 199, CountryID = 3, StateName = "Sierra Leone, Republic of" });

States.Add(new State() { StateID = 200, CountryID = 1, StateName = "Singapore, Republic of" });

States.Add(new State() { StateID = 201, CountryID = 2, StateName = "Slovakia (Slovak Republic)" });

States.Add(new State() { StateID = 202, CountryID = 2, StateName = "Slovenia, Republic of" });

States.Add(new State() { StateID = 203, CountryID = 4, StateName = "Solomon Islands" });

States.Add(new State() { StateID = 204, CountryID = 3, StateName = "Somalia, Somali Republic" });

States.Add(new State() { StateID = 205, CountryID = 3, StateName = "South Africa, Republic of" });

States.Add(new State() { StateID = 206, CountryID = 7, StateName = "South Georgia and the South Sandwich Islands" });

States.Add(new State() { StateID = 207, CountryID = 2, StateName = "Spain, Kingdom of" });

States.Add(new State() { StateID = 208, CountryID = 1, StateName = "Sri Lanka, Democratic Socialist Republic of" });

States.Add(new State() { StateID = 209, CountryID = 3, StateName = "Sudan, Republic of" });

States.Add(new State() { StateID = 210, CountryID = 6, StateName = "Suriname, Republic of" });

States.Add(new State() { StateID = 211, CountryID = 2, StateName = "Svalbard & Jan Mayen Islands" });

States.Add(new State() { StateID = 212, CountryID = 3, StateName = "Swaziland, Kingdom of" });

States.Add(new State() { StateID = 213, CountryID = 2, StateName = "Sweden, Kingdom of" });

States.Add(new State() { StateID = 214, CountryID = 2, StateName = "Switzerland, Swiss Confederation" });

States.Add(new State() { StateID = 215, CountryID = 1, StateName = "Syrian Arab Republic" });

States.Add(new State() { StateID = 216, CountryID = 1, StateName = "Taiwan" });

States.Add(new State() { StateID = 217, CountryID = 1, StateName = "Tajikistan, Republic of" });

States.Add(new State() { StateID = 218, CountryID = 3, StateName = "Tanzania, United Republic of" });

States.Add(new State() { StateID = 219, CountryID = 1, StateName = "Thailand, Kingdom of" });

States.Add(new State() { StateID = 220, CountryID = 1, StateName = "Timor-Leste, Democratic Republic of" });

States.Add(new State() { StateID = 221, CountryID = 3, StateName = "Togo, Togolese Republic" });

States.Add(new State() { StateID = 222, CountryID = 4, StateName = "Tokelau" });

States.Add(new State() { StateID = 223, CountryID = 4, StateName = "Tonga, Kingdom of" });

States.Add(new State() { StateID = 224, CountryID = 5, StateName = "Trinidad and Tobago, Republicof" });

States.Add(new State() { StateID = 225, CountryID = 3, StateName = "Tunisia, Tunisian Republic" });

States.Add(new State() { StateID = 226, CountryID = 1, StateName = "Turkey, Republic of" });

States.Add(new State() { StateID = 227, CountryID = 1, StateName = "Turkmenistan" });

States.Add(new State() { StateID = 228, CountryID = 5, StateName = "Turks and Caicos Islands" });

States.Add(new State() { StateID = 229, CountryID = 4, StateName = "Tuvalu" });

States.Add(new State() { StateID = 230, CountryID = 3, StateName = "Uganda, Republic of" });

States.Add(new State() { StateID = 231, CountryID = 2, StateName = "Ukraine" });

States.Add(new State() { StateID = 232, CountryID = 1, StateName = "United Arab Emirates" });

States.Add(new State() { StateID = 233, CountryID = 2, StateName = "United Kingdom of Great Britain & Northern Ireland" });

States.Add(new State() { StateID = 234, CountryID = 5, StateName = "United States of America" });

States.Add(new State() { StateID = 235, CountryID = 4, StateName = "United States Minor OutlyingIslands" });

States.Add(new State() { StateID = 236, CountryID = 5, StateName = "United States Virgin Islands" });

States.Add(new State() { StateID = 237, CountryID = 6, StateName = "Uruguay, Eastern Republic of" });

States.Add(new State() { StateID = 238, CountryID = 1, StateName = "Uzbekistan, Republic of" });

States.Add(new State() { StateID = 239, CountryID = 4, StateName = "Vanuatu, Republic of" });

States.Add(new State() { StateID = 240, CountryID = 6, StateName = "Venezuela, Bolivarian Republic of" });

States.Add(new State() { StateID = 241, CountryID = 1, StateName = "Vietnam, Socialist Republic of" });

States.Add(new State() { StateID = 242, CountryID = 4, StateName = "Wallis and Futuna" });

States.Add(new State() { StateID = 243, CountryID = 3, StateName = "Western Sahara" });

States.Add(new State() { StateID = 244, CountryID = 1, StateName = "Yemen" });

States.Add(new State() { StateID = 245, CountryID = 3, StateName = "Zambia, Republic of" });

States.Add(new State() { StateID = 246, CountryID = 3, StateName = "Zimbabwe, Republic of" });

}

#endregion

}

My VIEW Looks Like this (CustomerView.XAML):

<UserControl x:Class="SilverlightWithWCFService.View.CustomerView"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d" xmlns:View="clr-namespace:SilverlightWithWCFService.Model"

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"

d:DesignHeight="300" d:DesignWidth="400">

<UserControl.DataContext>

<View:CustomerViewModel />

</UserControl.DataContext>

<UserControl.Resources>

<View:CustomerViewModel x:Key="MyViewModel" />

</UserControl.Resources>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<telerik:RadGridView x:Name="CustomerGrid" AutoGenerateColumns="False" Grid.Row="0" ItemsSource="{Binding objSearchList}">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding CustomerID,Mode=TwoWay}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding CompanyName,Mode=TwoWay}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding ContactName,Mode=TwoWay}" />

<telerik:GridViewComboBoxColumn

DataMemberBinding="{Binding Country,Mode=TwoWay}"

Header="Country"

DisplayMemberPath="CountryName" SelectedValueMemberPath="CountryID"

ItemsSourceBinding="{Binding CountryList, Source={StaticResource MyViewModel}}" />

<telerik:GridViewComboBoxColumn

DataMemberBinding="{Binding State,Mode=TwoWay}"

Header="State"

DisplayMemberPath="StateName" SelectedValueMemberPath="StateID"

ItemsSourceBinding="{Binding StateList, Source={StaticResource MyViewModel}}"

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</UserControl>

My VIEW .CS Looks Like this (CustomerView.XAML.CS):

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using SilverlightWithWCFService.Model;

using Telerik.Windows.Controls;

using Telerik.Windows;

namespace SilverlightWithWCFService.View

{

public partial class CustomerView : UserControl

{

CustomerViewModel cvm = new CustomerViewModel();

public CustomerView()

{

InitializeComponent();

this.AddHandler(RadComboBox.SelectionChangedEvent, new Telerik.Windows.Controls.SelectionChangedEventHandler(comboSelectionChanged));

}

void comboSelectionChanged(object sender, RadRoutedEventArgs args)

{

RadComboBox comboBox = (RadComboBox)args.OriginalSource;

if (comboBox.SelectedValue == null || comboBox.SelectedValuePath != "CountryID")

{

return;

}

CustromerList custList = comboBox.DataContext as CustromerList;

custList.Country = (Int32)comboBox.SelectedValue;

cvm.CID = custList.Country;

}

private void Button_Click(object sender, RoutedEventArgs e)

{

}

1 Answer, 1 is accepted

answered on 17 May 2012, 12:54 PM

Please Change in This Class:

CustromerList
Add This Properties:

private IEnumerable<State> availableStateList;
        public IEnumerable<State> AvailableStateList
        {
            get
            {
                this.availableStateList = from c in AllLocations.States
                                          where c.CountryID == this.Country
                                          select c;
                return this.availableStateList;
            }
            set
            {
                this.availableStateList = value;
                this.OnPropertyChanged("AvailableStateList");
            }
        }

IN Constructor
public CustomerViewModel()

for (int i = 1; i <= 10; i++)
            {
                objsearchList.Add(new CustromerList()
                {
                    CustomerID = i,
                    CompanyName = i.ToString(),
                    ContactName = i.ToString(),
                    Country = 1,
                    State = 1,
                    AvailableStateList = from c in AllLocations.States
                                         where c.CountryID == 1
                                         select c
                });
 
                objSearchList = objsearchList;
 
            }

In .XAML File

<telerik:GridViewComboBoxColumn
                  DataMemberBinding="{Binding State,Mode=TwoWay}"
                  Header="State"
                  DisplayMemberPath="StateName" SelectedValueMemberPath="StateID"
                  ItemsSourceBinding="{Binding AvailableStateList}"
                   />

Also Remove StateList And CID Properties.