mysql - how to store null values in listbox c# -

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I am developing a window store app and there are several list boxes to get the data in the database, it is my MySQL Database screenshot is

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that null After value the database list box is not filled with the data shown in the form of the following screenshot

Enter image details here

I I want to keep blank values ​​blank and store other details How can I do this?

Here is the C # code 

  Private Zero Button_View_Click (Object Sender, RoutedEventArgs E) {listb0.Items.Clear (); Listb1.Items.Clear (); Listb2.Items.Clear (); Listb3.Items.Clear (); Listb4.Items.Clear (); Try {string query = @ "SELECT * FROM` bcasdb` .`tbl_results`;"; // This is the command class which will handle the query and the connection object. MySqlConnection conn = New MySqlConnection (BCASApp.DataModel.DB_CON.connection); MySqlCommand CMD = New MySqlCommand (query, conn); MySqlDataReader MyReader; Conn.Open (); MyReader = cmd.ExecuteReader (); // This query will be executed and the data will be saved in the database. While (Myrador. Reid ()) {ListBoxItem itm0 = New ListBoxItem (); Itm0.Content = MyReader.GetString (0); This.listb0.Items.Add (itm0); ListBoxItem itm1 = New ListBoxItem (); Itm1.Content = MyReader.GetString (1); This.listb1.Items.Add (itm1); ListBoxItem itm2 = New ListBoxItem (); Itm2.Content = MyReader.GetString (2); This.listb2.Items.Add (itm2); ListBoxItem itm3 = New ListBoxItem (); Itm3.Content = MyReader.GetString (3); This.listb3.Items.Add (itm3); ListBoxItem itm4 = New ListBoxItem (); Itm4.Content = MyReader.GetString (4); This.listb4.Items.Add (itm4); } Conn.Close (); } Hold (exception) {errormsgBox (); }}

If you want to work around this problem in code You need to check it Dibbullle using the databar method of deterord 

  listboxItim itm2 = new ListBoxItem (); Itm2.Content = MyReader.IsDBNull (2)? "": MyReader.GetString (2); This.listb2.Items.Add (itm2);

Of course this pattern should be applied to other columns which can potentially be nullified.


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