Add and Biding comboboxEdit DevExpress

Question

Im trying to bind one combobox from my class that i linked in the context

i have this in the control

I filled the Combobox befor from code behind like this

var lsproducts = new List();
        var Products =_licenseService.GetProductList();
        Products.ForEach((x) => {
            lsproducts.Add(new Product(x.Name, x.ProductId));
        });

And im setting the SelectedProduct like this

 [DataMember]
    public License SelectedLicense {
        get { return _SelectedLicense;}
        set {                      
            _SelectedLicense = value;                
            this.NotifyPropertyChanged("SelectedLicense");
        }
    }        

    public Product SelectedProduct
    {
        get
        {             
            return new Product(_SelectedLicense.Product.Name,_SelectedLicense.Product.ProductId);
        }             
    }

        this.cboProduct.ItemsSource = lsproducts.ToArray();

in both cases im using the object Product

 using System;
 using System.Collections.Generic;
using System.Linq;
using System.Text;
using pd.Common.Domain;

namespace LicenceManagerWPF.Views
{
public class Product
{
    public string Name { get; set; }
    public ProductEnum ProductID { get; set; }

    public Product(string ProductName,ProductEnum ID)
    {
        Name = ProductName;
        ProductID = ID;
    }

}

i dont know why its not selecting the product when i open the window.

i have another one [![Shows like this][2]][2]

I dont know why its display the x mark, but when i chouse another licence it updated the combo selection

The second one its only a couple of enums values that fill like this.

 cboActivationMode.Items.Add(
            new DevExpress.Xpf.Editors.ComboBoxEditItem()
            { Content = Enum.GetName(typeof(ActivationMode), ActivationMode.Online), Tag = ActivationMode.Online });

How can i bind the values to a combobox? Regards

        cboActivationMode.Items.Add(            
            new DevExpress.Xpf.Editors.ComboBoxEditItem()
            {Content = Enum.GetName(typeof(ActivationMode), ActivationMode.Offline),Tag = ActivationMode.Offline});

I tryed to do this

 public partial class LicenseDetail : UserControl
{
    private readonly LicenseService _licenseService;
    public LicenseDetail()
    {
        InitializeComponent();
        _licenseService = new LicenseService();            
        FillCombos();
    }

    private void FillCombos()
    {
        FillProducts();
        FillActivationMode();
        //var str = Enum.GetName(typeof(ProductEnum), ProductEnum.CDSAddIn);
        //this.cboProduct.ItemsSource = new string[] { str };
    }

    private void FillProducts()
    {

        var Products = _licenseService.GetProductList();
        cboProduct.ItemsSource = Products;            
    }

The product list is a list of Iproduct (interface), i dont get i why they made it like this but each product is diferent they implement the same baseclass and the interface

[DataContract]
public class ProductList : List
{
    public bool Contains(ProductEnum productId)
    {
        return this.Any(x => x.ProductId == productId);
    }

    public IProduct GetProduct(ProductEnum productId)
    {
        return this.FirstOrDefault(x => x.ProductId == productId);
    }

    public void Remove(ProductEnum productId)
    {
        Remove(GetProduct(productId));
    }
}

I changed the combo to bind like this SelectedItem="{Binding Path=DataContext.MyProduct, RelativeSource={RelativeSource AncestorType=Window}}"

I create the property in the class like this public IProduct MyProduct { get { return _MyProduct; } set { _MyProduct = value; this.NotifyPropertyChanged("MyProduct"); } }

And assaing like this _CustomerLicense.MyProduct = SelectedLicense.Product;

this is how the list of products is filled public IProduct GetProduct(ProductEnum productId) { IProduct product = null;

        var connection = GetConnection();

        try
        {
            var sql = string.Format(Resources.GetProduct, (int)productId);
            var cmd = new SqlCommand(sql, connection) { CommandType = CommandType.Text, Transaction = _transaction };
            using (var rdr = new NullableDataReader(cmd.ExecuteReader()))
                while (rdr.Read())
                {
                    var productName = rdr.GetString(0);
                    var featureId = rdr.GetInt32(1);
                    var featureDesc = rdr.GetString(2);
                    if (product == null)
                    {
                        switch (productId)
                        {
                            case ProductEnum.PDCalc:
                                product = new PDCalcProduct(productId, productName);
                                break;
                            case ProductEnum.PDMaint:
                                product = new PDMaintProduct(productId, productName);
                                break;
                            case ProductEnum.PBDynamics:
                                product = new PBDynamicsProduct(productId, productName);
                                break;
                            case ProductEnum.CDSAddIn:
                                product = new CDSAddInProduct(productId, productName);
                                break;
                        }
                    }
                    if (product != null)
                        product.Features.Add(new Feature((FeatureEnum)featureId, featureDesc));
                }
        }
        finally
        {
            CloseConnection(connection);
        }

        return product;
    }

without any luck. Regards

mm8 · Accepted Answer

The SelectedProduct property should have a public setter for you to be able to set it to the currently selected value in the ComboBox:

private Product _selectedProduct;
public Product SelectedProduct
{
    get { return _selectedProduct; }
    set
    {
        _selectedProduct = value;
        this.NotifyPropertyChanged("SelectedProduct");
    }
}

And for the intial value to be selected, you either need to set it to a Product object that is actually in the ItemsSource (lsproducts):

viewModel.SelectedProduct = lsproducts.FirstOrDefault(x => x.Name == _SelectedLicense.Product.Name && x.ProductID == _SelectedLicense.Product.ProductId);

Or you will have to override the Equals method of your Product class:

public class Product
{
    public string Name { get; set; }
    public ProductEnum ProductID { get; set; }

    public Product(string ProductName, ProductEnum ID)
    {
        Name = ProductName;
        ProductID = ID;
    }

    public override bool Equals(object obj)
    {
        Product other = obj as Product;
        return other != null && Name == other.Name && ProductID == other.ProductID;
    }
}

Add and Biding comboboxEdit DevExpress

Answers (2)

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