.net 程序怎么让登录用户名保存一星期

一、写Cookie：
private void Button1_Click(object sender, System.EventArgs e)

{

string uName=this.TextBox1.Text.Trim();

string uPwd=this.TextBox2.Text.Trim();

if(uName=="admin" & uPwd=="admin")

{

Response.Cookies["UserName"].Value=uName;

Response.Cookies["UserPwd"].Value=uPwd;

Response.Redirect("WebForm2.aspx");

}

else

{

Label1.Text="Your Name or Password is wrong";

}
}

private void Button1_Click(object sender, System.EventArgs e)

{

string uName,uPwd;

uName=this.txtUserName.Text.Trim();

uPwd=this.txtUserPwd.Text.Trim();

if(uName=="admin" & uPwd=="admin")

{

HttpCookie mCo