C# combobox/SelectedIndex随SQL更改

我有3个不同的SQL代码。我把我的3个文本（男人，女人，两者）放在组合框集合中。我不知道当我在combobox中选择example Men时，如何应用好的SQL代码

男子：

女士：

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

两者：

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

Look（法语）（Choisir le sexe=选择sexe）（Afficher=英语节目）

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非常感谢

假设您在组合框中填充三个字符串

Hommes、Femmes、Tous

，那么当您收到事件

SelectedIndexChanged

时，您可以编写如下内容

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
}

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编辑：嗯，只需阅读@marc_的评论

您需要编写C代码，当在组合框中进行选择（使用新System.EventHandler（ComboBox1_SelectedIndexChanged）时，该代码将起作用，然后运行相应的SQL调用。-这种旧式的逗号分隔表列表样式在ANSI-92 SQL标准（20年前！）。请停止使用它，汉克，伙计+代表！和平！

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
}