HttpException-Konstruktor (Int32, String, Int32)

Initialisiert mit dem HTTP-Antwortstatuscode, einer Fehlermeldung und einem Ausnahmecode eine neue Instanz der HttpException-Klasse.

Namespace: System.Web
Assembly: System.Web (in system.web.dll)

Syntax

'Declaration
Public Sub New ( _
    httpCode As Integer, _
    message As String, _
    hr As Integer _
)
'Usage
Dim httpCode As Integer
Dim message As String
Dim hr As Integer

Dim instance As New HttpException(httpCode, message, hr)

public HttpException (
    int httpCode,
    string message,
    int hr
)

public:
HttpException (
    int httpCode, 
    String^ message, 
    int hr
)

public HttpException (
    int httpCode, 
    String message, 
    int hr
)

public function HttpException (
    httpCode : int, 
    message : String, 
    hr : int
)

Parameter

httpCode
Der HTTP-Antwortstatuscode, der auf dem Client angezeigt wird.

message
Die Fehlermeldung, die dem Client beim Auslösen der Ausnahme angezeigt wird.

hr
Der Ausnahmecode, der den Fehler definiert.

Beispiel

Im folgenden Codebeispiel wird der HttpException-Konstruktor der HttpException-Klasse veranschaulicht. Der Benutzer gibt den Benutzernamen und die E-Mail-Informationen in den entsprechenden Textfeldern ein. Wenn eines der Textfelder leer bleibt, wird ein HttpException-Objekt erstellt und ausgelöst. Der Fehlercode der HttpException wird von der GetHttpCode-Methode abgerufen und auf der Webseite angezeigt.

<html>
   <head>
      <script language="VB" runat="server">
         Sub SubmitButton_Click(sender As Object, e As EventArgs)
            Try
               If Textbox1.Text.Length = 0 Or Textbox2.Text.Length = 0 Then
                  ' Raise an Exception if the username or emailid field is empty.
                  Throw New HttpException(901, "User name or e-mail ID not provided", 333)
               Else
                  MyLabel.Text = "Hello " & Textbox1.Text & "<br>"
                  MyLabel.Text += "The Weekly newsletter is mailed to :" & Textbox2.Text & "<br>"
               End If
            Catch ex As HttpException
               ' Display the error code returned by the GetHttpCode method.
               MyLabel.Text = "<h4><font color=red>The exception is " & ex.GetHttpCode() & _
                  " - " & ex.Message & "</font></h4>"
            End Try
         End Sub

         Sub Page_Load(sender As Object, e As EventArgs)
            MyLabel.Text = ""
         End Sub
      </script>
   </head>

   <body>
      <form runat="server" ID="Form1">
         <h3>HttpException Example</h3>
         Enter User name and E-mail
         <br><br>
         User Name:
         <asp:TextBox ID="Textbox1" Runat="server"></asp:TextBox>
         <br>
         E-mail ID:
         <asp:TextBox ID="Textbox2" Runat="server"></asp:TextBox>
         <asp:Button ID="Button1" Text="Submit" OnClick="SubmitButton_Click" runat="server"/>
         <p>
         <asp:label id="MyLabel" runat="server"/>
      </form>
   </body>
</html>

<html>
   <head>
      <script language="C#" runat="server">
         void SubmitButton_Click(Object sender, EventArgs e)
         {
            try
            {
               if(Textbox1.Text.Length==0 || Textbox2.Text.Length==0)
               {
                  // Raise an Exception if the username or the emailfield field is empty.
                  throw new HttpException(901,"User name or e-mail ID not provided.",333);
               }
               else
               {
                  MyLabel.Text="Hello "+Textbox1.Text+"<br>";
                  MyLabel.Text+="The Weekly newsletter is mailed to :"+
                           Textbox2.Text+"<br>";
               }
            }
            catch(HttpException ex)
            { 
               // Display the error code returned by the GetHttpCode method.
               MyLabel.Text="<h4><font color=red>The exception is "+
                  ex.GetHttpCode() +" - "+ ex.Message + "</font></h4>";
            }
         }

         void Page_Load(object sender,EventArgs e)
         {
            MyLabel.Text="";
         }
      </script>
   </head>

   <body>
      <form runat="server" ID="Form1">
         <h3>HttpException Example</h3>
         Enter UserName and Email
         <br><br>
         UserName :
         <asp:TextBox ID="Textbox1" Runat="server"></asp:TextBox>
         <br>
         E-mail ID :
         <asp:TextBox ID="Textbox2" Runat="server"></asp:TextBox>
         <asp:Button ID="Button1" Text="Submit" OnClick="SubmitButton_Click" runat="server" />
         <p>
         <asp:label id="MyLabel" runat="server" />
      </form>
   </body>
</html>

<html>
   <head>
        <script language="VJ#" runat="server">
        void SubmitButton_Click(Object sender, EventArgs e)
        {
            try {
                if(Textbox1.get_Text().get_Length()==0 || 
                    Textbox2.get_Text().get_Length()==0) {
                    // Raise an Exception if the username or the emailfield 
                    // field is empty.
                    throw new HttpException(901,"User name or e-mail " 
                        + "ID not provided.",333);
                }
                else {
                    MyLabel.set_Text("Hello "+Textbox1.get_Text()+"<br>");
                    MyLabel.set_Text(MyLabel.get_Text() 
                        + "The Weekly newsletter is mailed to :"
                        + Textbox2.get_Text()+"<br>");
                }
            }
            catch(HttpException ex) { 
                // Display the error code returned by the GetHttpCode method.
                MyLabel.set_Text("<h4><font color=red>The exception is " 
                    + ex.GetHttpCode() +" - "+ ex.get_Message() 
                    + "</font></h4>");
            }
        } //SubmitButton_Click

        void Page_Load(Object sender,EventArgs e)
        {
            MyLabel.set_Text("");
        } //Page_Load
        </script>
   </head>

   <body>
      <form runat="server" ID="Form1">
         <h3>HttpException Example</h3>
         Enter UserName and Email
         <br><br>
         UserName :
         <asp:TextBox ID="Textbox1" Runat="server"></asp:TextBox>
         <br>
         E-mail ID :
         <asp:TextBox ID="Textbox2" Runat="server"></asp:TextBox>
         <asp:Button ID="Button1" Text="Submit" OnClick="SubmitButton_Click" runat="server" />
         <p>
         <asp:label id="MyLabel" runat="server" />
      </form>
   </body>
</html>

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

HttpException-Klasse
HttpException-Member
System.Web-Namespace

Last updated on 2007-08-20

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