HttpListenerRequest.QueryString Vlastnost

Definice

Obor názvů:

System.Net

Sestavení:

System.Net.HttpListener.dll

Zdroj:

HttpListenerRequest.cs

Získá řetězec dotazu zahrnutý v požadavku.

public:
 property System::Collections::Specialized::NameValueCollection ^ QueryString { System::Collections::Specialized::NameValueCollection ^ get(); };

public System.Collections.Specialized.NameValueCollection QueryString { get; }

member this.QueryString : System.Collections.Specialized.NameValueCollection

Public ReadOnly Property QueryString As NameValueCollection

Hodnota vlastnosti

NameValueCollection

Objekt NameValueCollection , který obsahuje data dotazu zahrnutá v požadavku Url.

Příklady

Následující příklad kódu ukazuje použití QueryString vlastnosti.

public static void ShowRequestProperties1 (HttpListenerRequest request)
{
    // Display the MIME types that can be used in the response.
    string[] types = request.AcceptTypes;
    if (types != null)
    {
        Console.WriteLine("Acceptable MIME types:");
        foreach (string s in types)
        {
            Console.WriteLine(s);
        }
    }
    // Display the language preferences for the response.
    types = request.UserLanguages;
    if (types != null)
    {
        Console.WriteLine("Acceptable natural languages:");
        foreach (string l in types)
        {
            Console.WriteLine(l);
        }
    }

    // Display the URL used by the client.
    Console.WriteLine("URL: {0}", request.Url.OriginalString);
    Console.WriteLine("Raw URL: {0}", request.RawUrl);
    Console.WriteLine("Query: {0}", request.QueryString);

    // Display the referring URI.
    Console.WriteLine("Referred by: {0}", request.UrlReferrer);

    //Display the HTTP method.
    Console.WriteLine("HTTP Method: {0}", request.HttpMethod);
    //Display the host information specified by the client;
    Console.WriteLine("Host name: {0}", request.UserHostName);
    Console.WriteLine("Host address: {0}", request.UserHostAddress);
    Console.WriteLine("User agent: {0}", request.UserAgent);
}

Public Shared Sub ShowRequestProperties1(ByVal request As HttpListenerRequest)
    ' Display the MIME types that can be used in the response.
    Dim types As String() = request.AcceptTypes

    If types IsNot Nothing Then
        Console.WriteLine("Acceptable MIME types:")

        For Each s As String In types
            Console.WriteLine(s)
        Next
    End If

    ' Display the language preferences for the response.
    types = request.UserLanguages

    If types IsNot Nothing Then
        Console.WriteLine("Acceptable natural languages:")

        For Each l As String In types
            Console.WriteLine(l)
        Next
    End If

    ' Display the URL used by the client.
    Console.WriteLine("URL: {0}", request.Url.OriginalString)
    Console.WriteLine("Raw URL: {0}", request.RawUrl)
    Console.WriteLine("Query: {0}", request.QueryString)

    ' Display the referring URI.
    Console.WriteLine("Referred by: {0}", request.UrlReferrer)

    ' Display the HTTP method.
    Console.WriteLine("HTTP Method: {0}", request.HttpMethod)

    ' Display the host information specified by the client.
    Console.WriteLine("Host name: {0}", request.UserHostName)
    Console.WriteLine("Host address: {0}", request.UserHostAddress)
    Console.WriteLine("User agent: {0}", request.UserAgent)
End Sub

Poznámky

V adrese URL jsou informace dotazu odděleny od informací o cestě otazníkem (?). Páry název/hodnota jsou oddělené znaménkem rovná se (=). Pokud chcete získat přístup k datům dotazu jako jeden řetězec, získejte Query hodnotu vlastnosti z objektu Uri vráceného objektem Url.

Poznámka

Dotazy bez znaménka rovná se (například http://www.contoso.com/query.htm?Name) se přidají do null klíče v NameValueCollection.

Viz také

• HttpListener
• HttpListenerContext
• HttpListenerResponse