HttpParseException Class

 

The exception that is thrown when a parse error occurs.

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

System.Object
  System.Exception
    System.SystemException
      System.Runtime.InteropServices.ExternalException
        System.Web.HttpException
          System.Web.HttpParseException

<SerializableAttribute>
Public NotInheritable Class HttpParseException
	Inherits HttpException

NameDescription
System_CAPS_pubmethodHttpParseException()

Initializes a new instance of the HttpParseException class.

System_CAPS_pubmethodHttpParseException(String)

Initializes a new instance of the HttpParseException class with a specified error message.

System_CAPS_pubmethodHttpParseException(String, Exception)

Initializes a new instance of the HttpParseException class with a specified error message and a reference to the inner.

System_CAPS_pubmethodHttpParseException(String, Exception, String, String, Int32)

Initializes a new instance of the HttpParseException class with specific information about the source code being compiled and the line number on which the exception occurred.

NameDescription
System_CAPS_pubpropertyData

Gets a collection of key/value pairs that provide additional user-defined information about the exception.(Inherited from Exception.)

System_CAPS_pubpropertyErrorCode

Gets the HRESULT of the error.(Inherited from ExternalException.)

System_CAPS_pubpropertyFileName

Gets the name of the file being parsed when the error occurs.

System_CAPS_pubpropertyHelpLink

Gets or sets a link to the help file associated with this exception.(Inherited from Exception.)

System_CAPS_pubpropertyHResult

Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.(Inherited from Exception.)

System_CAPS_pubpropertyInnerException

Gets the Exception instance that caused the current exception.(Inherited from Exception.)

System_CAPS_pubpropertyLine

Gets the number of the line being parsed when the error occurs.

System_CAPS_pubpropertyMessage

Gets a message that describes the current exception.(Inherited from Exception.)

System_CAPS_pubpropertyParserErrors

Gets the parser errors for the current exception.

System_CAPS_pubpropertySource

Gets or sets the name of the application or the object that causes the error.(Inherited from Exception.)

System_CAPS_pubpropertyStackTrace

Gets a string representation of the immediate frames on the call stack.(Inherited from Exception.)

System_CAPS_pubpropertyTargetSite

Gets the method that throws the current exception.(Inherited from Exception.)

System_CAPS_pubpropertyVirtualPath

Gets the virtual path to source file that generated the error.

System_CAPS_pubpropertyWebEventCode

Gets the event codes that are associated with the HTTP exception.(Inherited from HttpException.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodGetBaseException()

When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.(Inherited from Exception.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetHtmlErrorMessage()

Gets the HTML error message to return to the client.(Inherited from HttpException.)

System_CAPS_pubmethodGetHttpCode()

Gets the HTTP response status code to return to the client. (Inherited from HttpException.)

System_CAPS_pubmethodGetObjectData(SerializationInfo, StreamingContext)

When overridden in a derived class, sets the SerializationInfo object with information about the exception.(Overrides HttpException.GetObjectData(SerializationInfo, StreamingContext).)

System_CAPS_pubmethodGetType()

Gets the runtime type of the current instance.(Inherited from Exception.)

System_CAPS_pubmethodToString()

Returns a string that contains the HRESULT of the error.(Inherited from ExternalException.)

The HttpParseException class is an HTTP-specific exception class that enables ASP.NET to output parser exception information. For more information on throwing and handling exceptions, see Handling and Throwing Exceptions.

The following example demonstrates how to use the HttpParseException to customize errors generated during page parsing. In this example, a customized HtmlSelect control is defined. If child elements of the custom control are not of a specified type then an HttpParseException is thrown in the overridden GetChildControlType method of a custom HtmlSelectBuilder. To generate a parse exception, change the child element literal MyCustomOption to any other string.

<%@ Page Language="VB"%>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB" Assembly="Samples.AspNet.VB" %>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>HttpParseException Example</title>
</head>
  <body>
    <form id="Form1" runat="server">
      <h3>HttpParseException Example</h3>

      <aspSample:CustomHtmlSelectWithHttpParseException
       id="customhtmlselect1"
       runat="server">
      <aspSample:MyCustomOption optionid="option1" value="1"/>
      <aspSample:MyCustomOption optionid="option2" value="2"/>
      <aspSample:MyCustomOption optionid="option3" value="3"/>
      </aspSample:CustomHtmlSelectWithHttpParseException>

    </form>

  </body>

</html>
Imports System
Imports System.Security.Permissions
Imports System.Collections
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.HtmlControls

Namespace Samples.AspNet.VB
    ' Define a child control for the custom HtmlSelect.
    Public Class MyCustomOption
        Private _id As String
        Private _value As String


        Public Property optionid() As String
            Get
                Return _id
            End Get
            Set(ByVal value As String)
                _id = value
            End Set
        End Property

        Public Property value() As String
            Get
                Return _value
            End Get
            Set(ByVal value As String)
                _value = value
            End Set
        End Property
    End Class

    ' Define a custom HtmlSelectBuilder.
    Public Class MyHtmlSelectBuilderWithparseException
        Inherits HtmlSelectBuilder

        <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
        Public Overrides Function GetChildControlType(ByVal tagName As String, ByVal attribs As IDictionary) As Type

            ' Distinguish between two possible types of child controls.
            If tagName.ToLower().EndsWith("mycustomoption") Then

                Return GetType(MyCustomOption)

            Else

                Throw New HttpParseException("This custom HtmlSelect control" & _ 
                         "requires child elements of the form ""MyCustomOption""")
            End If

        End Function

    End Class


    <ControlBuilderAttribute(GetType(MyHtmlSelectBuilderWithparseException))> _
    Public Class CustomHtmlSelectWithHttpParseException
        Inherits HtmlSelect

        ' Override the AddParsedSubObject method.
        Protected Overrides Sub AddParsedSubObject(ByVal obj As Object)

            Dim _outputtext As String
            If TypeOf obj Is MyCustomOption Then
                _outputtext = "custom select option : " + CType(obj, MyCustomOption).value
                Dim li As New ListItem(_outputtext, CType(obj, MyCustomOption).value)
                MyBase.Items.Add(li)
            End If

        End Sub

    End Class

End Namespace

.NET Framework
Available since 1.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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