CookieParameter.CookieName Egenskap

Definition

Namnområde:
System.Web.UI.WebControls
Sammansättning:
System.Web.dll

Hämtar eller anger namnet på DEN HTTP-cookie som parametern binder till.

public:
 property System::String ^ CookieName { System::String ^ get(); void set(System::String ^ value); };
public string CookieName { get; set; }
member this.CookieName : string with get, set
Public Property CookieName As String

Egenskapsvärde

String

En sträng som identifierar HTTP-cookien på klientsidan som parametern binder till.

Exempel

Följande kodexempel visar hur du deklarativt använder en SqlDataSource kontroll och ett CookieParameter objekt som är bundet till en HTTP-cookie för att visa data från Northwind Traders-databasen i en GridView kontroll.

<%@Page  Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

void Page_Load(Object sender, EventArgs e){
  // These cookies might be added by a login form.
  // They are added here for simplicity.
  if (!IsPostBack) {
      Response.Cookies.Add(new HttpCookie("lname",    "davolio"));
      Response.Cookies.Add(new HttpCookie("loginname","ndavolio"));
      Response.Cookies.Add(new HttpCookie("lastvisit", DateTime.Now.ToString()));
  }
}


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataSet"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand = "SELECT OrderID,CustomerID,OrderDate,RequiredDate,ShippedDate 
                           FROM Orders WHERE EmployeeID = 
                           (SELECT EmployeeID FROM Employees WHERE LastName = @lastname)">
          <SelectParameters>
            <asp:CookieParameter Name="lastname" CookieName="lname" />
          </SelectParameters>
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AllowSorting="True"
          DataSourceID="SqlDataSource1">
      </asp:GridView>

    </form>
  </body>
</html>

<%@Page  Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

Sub Page_Load(sender As Object, e As EventArgs)
  ' These cookies might be added by a login form.
  ' They are added here for simplicity.
  If (Not IsPostBack) Then
      Dim cookie As HttpCookie

      cookie = New HttpCookie("lname","davolio")
      Response.Cookies.Add(cookie)

      cookie = New HttpCookie("loginname","ndavolio")
      Response.Cookies.Add(cookie)

      cookie = New HttpCookie("lastvisit", DateTime.Now.ToString())
      Response.Cookies.Add(cookie)
  End If
End Sub ' Page_Load
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataSet"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand = "SELECT OrderID,CustomerID,OrderDate,RequiredDate,ShippedDate 
                           FROM Orders WHERE EmployeeID = 
                           (SELECT EmployeeID FROM Employees WHERE LastName = @lastname)">
          <SelectParameters>                 
            <asp:CookieParameter Name="lastname" CookieName="lname" />
          </SelectParameters>
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AllowSorting="True"
          DataSourceID="SqlDataSource1">
      </asp:GridView>

    </form>
  </body>
</html>

Följande kodexempel visar hur du programmatiskt skapar ett CookieParameter objekt, anger dess egenskaper och lägger till det i en SqlDataSource kontrollsamling SelectParameters .

public partial class cookieparam2cs_aspx : System.Web.UI.Page 
{
    void Page_Load(Object sender, EventArgs e)
    {
        // These cookies might be added by a login form.
        // They are added here for simplicity.
        if (!IsPostBack)
        {
            Response.Cookies.Add(new HttpCookie("lname", "davolio"));
            Response.Cookies.Add(new HttpCookie("loginname", "ndavolio"));
            Response.Cookies.Add(new HttpCookie("lastvisit", DateTime.Now.ToString()));

            // You can add a CookieParameter to the SqlDataSource control's
            // SelectParameters collection programmatically.
            CookieParameter cookieParam = new CookieParameter();
            cookieParam.Name = "lastname";
            cookieParam.Type = TypeCode.String;
            cookieParam.CookieName = "lname";

            SqlDataSource1.SelectParameters.Add(cookieParam);
        }
    }
}

Partial Class cookieparam2vb_aspx
    Inherits System.Web.UI.Page
    Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        ' These cookies might be added by a login form.
        ' They are added here for simplicity.
        If (Not IsPostBack) Then
            Dim cookie As HttpCookie

            cookie = New HttpCookie("lname", "davolio")
            Response.Cookies.Add(cookie)

            cookie = New HttpCookie("loginname", "ndavolio")
            Response.Cookies.Add(cookie)

            cookie = New HttpCookie("lastvisit", DateTime.Now.ToString())
            Response.Cookies.Add(cookie)


            ' You can add a CookieParameter to the SqlDataSource control's
            ' SelectParameters collection programmatically.
            Dim cookieParam As New CookieParameter()
            cookieParam.Name = "lastname"
            cookieParam.Type = TypeCode.String
            cookieParam.CookieName = "lname"

            SqlDataSource1.SelectParameters.Add(cookieParam)

        End If
    End Sub
End Class

Kommentarer

Egenskapen CookieName identifierar en HTTP-cookie som representeras av ett HttpCookie objekt och är tillgänglig via det aktuella HttpRequest objektet. Om HTTP-cookien inte är tillgänglig i det aktuella HttpRequest objektet Evaluate binder metoden parametern till värdet för DefaultValue egenskapen, om den har angetts. Om egenskapen DefaultValue inte har angetts Evaluate kan metoden inte binda parametern till ett värde.

Gäller för