2014.12.06 ASP.NET 三级联动，添加员工，修改员工

public partial class edit : System.Web.UI.Page
{
MyDBDataContext context = new MyDBDataContext();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//显示所有民族
var q = context.Nation;
DropDownList1.DataSource = q;
DropDownList1.DataTextField = "Name";
DropDownList1.DataValueField = "Code";
DropDownList1.DataBind();
ShowData();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
//获取元素
string code = TextBox1.Text;
string name = TextBox2.Text;
bool sex = Convert.ToBoolean(RadioButtonList1.SelectedValue);
string nation = DropDownList1.SelectedValue;
DateTime birthday = Convert.ToDateTime(TextBox3.Text);
//添加
var q = context.Info.Where(p => p.Code == code);
Info data = q.First();
data.Code = code;
data.Name = name;
data.Sex = sex;
data.Nation = nation;
data.Birthday = birthday;

context.SubmitChanges();
Response.Redirect("Default2.aspx");
}

private void ShowData()
{
if (Request["id"] != null)
{
string s = Request["id"].ToString();
var q = context.Info.Where(p=>p.Code==s);
if (q.Count() > 0)
{
Info data = q.First();
TextBox1.Text = data.Code;
TextBox2.Text = data.Name;
RadioButtonList1.SelectedValue = data.Sex.Value.ToString();
DropDownList1.SelectedValue = data.Nation;
TextBox3.Text = data.Birthday.ToString();
}
}
else
{
Response.Write("没有找到相关信息！<a href='Default2.aspx'>返回</a>");
Response.End();
}
}
}