ASP.NET Tutorial/Development/HttpException
Содержание
Catch HttpException
<source lang="csharp">
<%@ Page Language="vb" EnableSessionState="false" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Session("foo") = "Foo"
Catch HttpEx As HttpException
Message.Text = "ERROR:</br>"
Message.Text &= "Message: " & HttpEx.Message & "</br>"
Message.Text &= "Help Link: " & HttpEx.HelpLink & "</br>"
Message.Text &= "Error Code: " & HttpEx.ErrorCode & "</br>"
Message.Text &= "Source: " & HttpEx.Source & "</br>"
Message.Text &= "Stack Trace: " & HttpEx.StackTrace & "</br>"
Message.Text &= "Target Site: " & HttpEx.TargetSite.ToString() & "</br>"
Message.Text &= "Http Error Message: " & HttpEx.GetHtmlErrorMessage() & "</br>"
Message.Text &= "Http Error Code: " & HttpEx.GetHttpCode() & "</br>"
Message.Text &= "String: " & HttpEx.ToString() & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="Message" forecolor="red" runat="server"/>
</body> </html></source>
Convert Exception to string
<source lang="csharp">
<%@ Page Language="vb" EnableSessionState="false" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Session("foo") = "Foo"
Catch HttpEx As HttpException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "String Representation of Exception: " & _
HttpEx.ToString() & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
Exception Message
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Throw New HttpException("Threw an error from Page_Load")
Catch HttpEx As HttpException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "Message: " & HttpEx.Message & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
Get base exception
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Dim myHttpEx As _
New HttpException("This is the original exception")
Dim myHttpEx2 As _
New HttpException("This is a nested exception", myHttpEx)
Throw New HttpException("Threw an exception from Page_Load", _
myHttpEx2)
Catch HttpEx As HttpException
Dim InnerHttpEx As HttpException
InnerHttpEx = HttpEx.InnerException
Message.Text = "ERROR:</br>"
Message.Text &= "Message: " & HttpEx.Message & "</br>"
Message.Text &= "Inner Exception Message: " & _
InnerHttpEx.Message & "</br>"
Message.Text &= "Base Exception Message: " & _
InnerHttpEx.GetBaseException.Message & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="Message" forecolor="red" runat="server"/>
</body> </html></source>
Get error message
<source lang="csharp">
<%@ Page Language="vb" EnableSessionState="false" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Server.Execute("Foo.aspx")
Catch HttpEx As HttpException
Message.Text = "ERROR:</br>"
Message.Text &= "Http Error Message: " & _
HttpEx.GetHtmlErrorMessage() & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="Message" forecolor="red" runat="server"/>
</body> </html></source>
GetHttpCode
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Server.Execute("Foo.aspx")
Catch HttpEx As HttpException
Message.Text = "ERROR:</br>"
Message.Text &= "Http Status Code: " & _
HttpEx.GetHttpCode() & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="Message" forecolor="red" runat="server"/>
</body> </html></source>
HelpLink
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Dim myHttpEx As _
New HttpException("Threw an exception from Page_Load")
myHttpEx.HelpLink = "file://C:/Data.htm"
Throw myHttpEx
Catch HttpEx As HttpException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "Message: " & HttpEx.Message & "</br>"
myMessage.Text &= "Help Link: " & HttpEx.HelpLink & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
HttpException("Threw an error from Page_Load", 100)
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Throw New HttpException("Threw an error from Page_Load", 100)
Catch HttpEx As HttpException
Message.Text = "ERROR:</br>"
Message.Text &= "Message: " & HttpEx.Message & "</br>"
Message.Text &= "Error Code: " & HttpEx.ErrorCode & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="Message" forecolor="red" runat="server"/>
</body> </html></source>
InnerException
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Dim myHttpEx As _
New HttpException("This is a nested exception")
Throw New HttpException("Threw an exception from Page_Load", _
myHttpEx)
Catch HttpEx As HttpException
Dim InnerHttpEx As HttpException
InnerHttpEx = HttpEx.InnerException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "Message: " & HttpEx.Message & "</br>"
myMessage.Text &= "Inner Exception Message: " & _
InnerHttpEx.Message & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
Source of exception
<source lang="csharp">
<%@ Page Language="vb" EnableSessionState="false" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Session("foo") = "Foo"
Catch HttpEx As HttpException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "myMessage: " & HttpEx.Message & "</br>"
myMessage.Text &= "Source: " & HttpEx.Source & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
Stack trace
<source lang="csharp">
<%@ Page Language="vb" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
ThrowMeAnException
Catch HttpEx As HttpException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "Message: " & HttpEx.Message & "</br>"
myMessage.Text &= "Stack Trace: " & HttpEx.StackTrace & "</br>"
End Try
End Sub
Sub ThrowMeAnException()
Throw New HttpException("Threw an error from ThrowMeAnException")
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
Target site
<source lang="csharp">
<%@ Page Language="vb" EnableSessionState="false" %> <html> <head>
<script runat="server">
Sub Page_Load()
Try
Session("foo") = "Foo"
Catch HttpEx As HttpException
myMessage.Text = "ERROR:</br>"
myMessage.Text &= "Message: " & HttpEx.Message & "</br>"
myMessage.Text &= "Target Site: " & HttpEx.TargetSite.Name & "</br>"
End Try
End Sub
</script>
</head> <body>
<asp:label id="myMessage" forecolor="red" runat="server"/>
</body> </html></source>
