ComboBox/SelectedIndexChanged with SQL

Question

我有3個不同的SQL代碼。我把我的3個文本（男人，女人，兩個）都放在組合框中。我不知道如何在通過示例選擇組合框中的Men時，使用好的SQL代碼。

戰警：

SELECT EmployeeID, FirstName, LastName, MaritalStatus, Gender 
FROM Employes, Contacts 
WHERE Employes.ContactId = Contacts.ContactID 
    AND Gender = 'M' 
ORDER BY LastName, FirstName 

女人：

SELECT EmployeeID, FirstName, LastName, MaritalStatus, Gender 
FROM Employes, Contacts 
WHERE Employes.ContactId = Contacts.ContactID 
    AND Gender = 'F' 
ORDER BY LastName, FirstName 

兩個：

SELECT EmployeeID, FirstName, LastName, MaritalStatus, Gender 
FROM Employes, Contacts 
WHERE Employes.ContactId = Contacts.ContactID 
ORDER BY LastName, FirstName 

看（在法國）（Choisir樂sexe =選擇sexe）（Afficher =展英文）

非常感謝！

Answer 1

假如你填寫你的組合框用三根弦Hommes, Femmes, Tous那麼當您收到事件SelectedIndexChanged你可以寫這樣的事情

private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e) 
{ 
    // Get the currently selected item in the ListBox. 
    string curItem = comboBox1.SelectedItem.ToString(); 
    string sqlText = "SELECT EmployeeID, FirstName, LastName, MaritalStatus, Gender " + 
        "FROM Employes JOIN Contacts ON Employes.ContactId = Contacts.ContactID " 
    switch(curItem) 
    { 
     case "Femmes": 
      sqlText += "AND Gender = 'F' ORDER BY LastName, FirstName"; 
      break; 
     case "Hommes": 
      sqlText += "AND Gender = 'M' ORDER BY LastName, FirstName"; 
      break; 
     default: 
      sqlText += "ORDER BY LastName, FirstName"; 
    } 
    DataTable dt = GetEmployeeList(sqlText); 
    ...... // Now fill the datasource of your grid 
} 

編輯：嗯，剛看完@marc_s評論