How to bind data to a combobox from a table in a MySql database (WPF)

Question

I need to get data from the table item_details and need to bind to a combobox.

There are two columns item_id and item_name. I want to load all the data in item_id column to the combobox and when the selected value of the combobox is changing it should reflect to a textbox showing the corresponding string value of the item_name column.

so far I tried two ways,

http://www.c-sharpcorner.com/uploadfile/syedshakeer/bind-combobox-in-wpf/ http://www.codeproject.com/Articles/20439/WPF-DataBinding

but the problem is nothing is shown in the combobox.

here is my code.

public partial class ComboBoxBinding : Window
{
    private readonly MySqlConnection _connection;
    public ComboBoxBinding()
    {
        InitializeComponent();

        _connection = new MySqlConnection("server=localhost;user  id=*****;password=******;database=onion;persistsecurityinfo=True");
        var dataAdapter = new MySqlDataAdapter("SELECT item_id, item_name FROM item_details", _connection);


        DataSet ds = new DataSet();
        dataAdapter.Fill(ds, "item_details");

        // Method1
        cmbItem1.ItemsSource = ds.Tables[0].Columns["item_id"].ToString();

        cmbItem1.DisplayMemberPath = ds.Tables[0].Columns["item_id"].ToString();
        cmbItem1.SelectedValuePath = ds.Tables[0].Columns["item_name"].ToString();
        // End of the Method1


        // Method2
        cmbItem1.DataContext = ds.Tables["item_details"].DefaultView;
        cmbItem1.DisplayMemberPath = ds.Tables["item_details"].Columns["item_id"].ToString();
        cmbItem1.SelectedValuePath = ds.Tables["item_details"].Columns["item_name"].ToString();
        // End of the Method2
    }


    ~ComboBoxBinding()
    {
        _connection.Close();
    }

    private void cmbItem1_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        itemName1.Text = cmbItem1.SelectedValue.ToString();
    }
}

}

Note I tried Method1 and Method2 separately but both are included in here in the same code just for the representation.

Can anyone suggest me what is the mistake?

Gericke · Accepted Answer · 2017-08-10 11:14:45Z

1

Finally got it :) To display the details, code should be as follows(instead of Method1 and Method2)

DataSet ds = new DataSet();
dataAdapter.Fill(ds, "item_details");
DataTable dt = ds.Tables[0];
cmbItem1.ItemsSource = ((IListSource) dt).GetList();
cmbItem1.DisplayMemberPath = "item_id";
cmbItem1.SelectedValuePath = "item_name";

edited Aug 10, 2017 at 11:14

Gericke

2,2599 gold badges47 silver badges75 bronze badges

answered Apr 21, 2016 at 19:03

Lahiru Jayathilake

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