mysql - Eliminate empty string values in databound combobox C# -

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I have more than 30 combobox in my application, which I am bound with the MySQL database, but every Cambobox data and Below the empty string it shows both. How can I ignore empty strings and just show string values?

This is my code: 

  zero-cumBox () {string constring = string.format ("datasource = {0} '; port =' {1} '; Database = '{2}'; user name = uwloanmanmain; password = ********* 180 ", dbserverip. Text, curport.Text, currentdb.Text); String query = "choose wqrtiff.customconditions; *"; MySqlConnection conwaqDatabasecc = New MySqlConnection (constring); MySqlCommand cmdwaqDatabase = New MySqlCommand (query, conwaqDatabasecc); MySqlDataReader myreader666; Try {conwaqDatabasecc.Open (); Myreader666 = cmdwaqDatabase.ExecuteReader (); While (myreader666.Read ()) {string sName = myreader666.GetString ("50079"); 50079combobox.Items.Add (SNAME); String sName2 = myreader666.getString ("bouth"); Bauthcombobox.Items.Add (sName2); String sName3 = myreader666.GetString ("Marite"); Myacttcombobox.Items.Add (sName3); String sName4 = myreader666.getString ("payscale"); Payscalecombox.Items.Add (sName4); String sName5 = myreader666.getString ("returns"); Returnsscombobox.Items.Add (sName5); String sName6 = myreader666.GetString ("report"); Reportcombobox.Items.Add (sName6); }} Hold {} conwaqDatabasecc.Close ();

}

Just a simple statement Please. Add. 

  string sName = myreader666.getString ("50079"); If (! String.IsNullOrEmpty (sName)) {50079combobox.Items.Add (sName); }

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