HttpException 构造函数

参考

定义

命名空间:: System.Web

程序集:: System.Web.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

初始化 HttpException 类的新实例。

重载

HttpException()	初始化 HttpException 类的新实例并创建一个空 HttpException 对象。
HttpException(String)	使用所提供的错误消息初始化 HttpException 类的新实例。
HttpException(Int32, String)	使用 HTTP 响应状态代码和错误消息初始化 HttpException 类的新实例。
HttpException(SerializationInfo, StreamingContext)	用序列化数据初始化 HttpException 类的新实例。
HttpException(String, Exception)	使用错误消息和 HttpException 属性初始化 InnerException 类的新实例。
HttpException(String, Int32)	使用错误消息和异常代码初始化 HttpException 类的新实例。
HttpException(Int32, String, Exception)	使用 HTTP 响应状态代码、错误消息以及 HttpException 属性初始化 InnerException 类的新实例。
HttpException(Int32, String, Int32)	使用 HTTP 响应状态代码、错误消息和异常代码初始化 HttpException 类的新实例。

HttpException()

初始化 HttpException 类的新实例并创建一个空 HttpException 对象。

public:
 HttpException();

public HttpException ();

Public Sub New ()

示例

下面的代码示例演示 HttpException 类 HttpException 的构造函数。该方法 CheckNumber 通过文本框接受用户输入的值，并检查它是否为整数。如果值不是整数，则会引发异常，然后创建并引发一个新 HttpException 对象。该异常在事件处理程序中 Button_Click 捕获，并在浏览器中显示错误消息。

重要

此示例具有一个接受用户输入的文本框，这是一个潜在的安全威胁。默认情况下，ASP.NET 网页验证用户输入是否不包含脚本或 HTML 元素。有关详细信息，请参阅脚本侵入概述。


<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>
            Example for HttpException
         </title>
<script language="C#" runat="server">
         void CheckNumber()
         {
            try
            {
               // Check whether the value is an integer.
               String convertInt = textbox1.Text;
               Convert.ToInt32(convertInt);
            }
            catch(Exception e)
            {
               // Throw a 'HttpException' object.
               throw new HttpException();
            }
         }
      
         void Button_Click(Object sender, EventArgs e)
         {
            try
            {
               CheckNumber();
               label1.Text = "The integer value you entered is: "+textbox1.Text;
            }
            catch(HttpException exp)
            {
               label1.Text = "<font color='red'>An HttpException was raised!:"
                  + " The value entered in the textbox is not an integer.</font>";
            }
         }

         void page_load(object sender,EventArgs e)
         {
            label1.Text="";
         }
      </script>
   </head>
   
   <body>
      <center>
         <h3>
            Example for HttpException
         </h3>
      </center>
      
      <form id="WebForm9" method="post" runat="server">
         <center>
         <br />
         <b>Enter a value in the text box.</b>
         <br />
         <asp:TextBox Runat="server" ID="textbox1"></asp:TextBox>
         <br />
         <asp:Button Text="Click Here" OnClick="Button_Click" Runat="server"></asp:Button>
         <br />
         <b><asp:Label Runat="server" ID="label1"></asp:Label></b>
         </center>
      </form>
   </body>
</html>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>Example for HttpException</title>
<script language="VB" runat="server">
         Sub CheckNumber()
            Try
               ' Check whether the value is an integer.
               Dim convertInt As [String] = textbox1.Text
               Convert.ToInt32(convertInt)
            Catch e As Exception
               ' Throw the 'HttpException' object.
               Throw New HttpException()
            End Try
         End Sub 'CheckNumber
 
         Sub Button_Click(sender As [Object], e As EventArgs)
            Try
               CheckNumber()
               label1.Text = "The integer value you entered is: " + textbox1.Text
            Catch exp As HttpException
               label1.Text = "<font color='red'>An HttpException was raised!:" _
                  & " The value entered in the textbox is not an integer</font>"
            End Try
         End Sub 'Button_Click
       
         Sub Page_Load(sender As [Object], e As EventArgs)
            label1.Text=""
         End Sub
      </script>
   </head>

   <body>
      <center>
         <h3>Example for HttpException</h3>
      </center>
      <form id="WebForm9" method="post" runat="server">
         <center>
            <b>Enter a value in the text box.</b>
            <asp:TextBox Runat="server" ID="textbox1"></asp:TextBox>
            <br />
            <asp:Button Text="Click Here" OnClick="Button_Click" Runat="server"></asp:Button>
            <br />
            <b><asp:Label Runat="server" ID="label1"></asp:Label></b>
         </center>
      </form>
   </body>
</html>

注解

处理异常时，捕获一系列相关异常非常有用，并引发外部异常以响应内部异常。

对导致外部异常的内部异常的引用可从 InnerException 外部异常的属性获取。此机制保留早期异常（包括原始异常）携带的错误信息，同时允许创建更有意义的外部异常。有关详细信息，请参阅 InnerException。

另请参阅

适用于

HttpException(String)

使用所提供的错误消息初始化 HttpException 类的新实例。

public:
 HttpException(System::String ^ message);

public HttpException (string message);

new System.Web.HttpException : string -> System.Web.HttpException

Public Sub New (message As String)

参数

message: String

当发生异常时向客户端显示的错误消息。

示例

下面的代码示例演示 HttpException 类 HttpException 的构造函数。如果用户输入的值为 0，则会引发一个 HttpException 。

重要

if (Num == 0)
{
   throw new HttpException("No value entered");
}

If Num = 0 Then
   Throw New HttpException("No value entered")
end if

另请参阅

适用于

HttpException(Int32, String)

使用 HTTP 响应状态代码和错误消息初始化 HttpException 类的新实例。

public:
 HttpException(int httpCode, System::String ^ message);

public HttpException (int httpCode, string message);

new System.Web.HttpException : int * string -> System.Web.HttpException

Public Sub New (httpCode As Integer, message As String)

参数

httpCode: Int32

发送到对应于此错误的客户端的 HTTP 响应状态代码。

message: String

当发生异常时向客户端显示的错误消息。

另请参阅

InnerException

适用于

HttpException(SerializationInfo, StreamingContext)

用序列化数据初始化 HttpException 类的新实例。

protected:
 HttpException(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);

protected HttpException (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);

new System.Web.HttpException : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Web.HttpException

Protected Sub New (info As SerializationInfo, context As StreamingContext)

参数

info: SerializationInfo

包含有关所引发异常的序列化对象数据的 SerializationInfo。

context: StreamingContext

StreamingContext，它包含有关源或目标的上下文信息。

注解

在 HttpException 反序列化期间调用构造函数以重新构造通过流传输的异常对象。有关详细信息，请参阅 XML 和 SOAP 序列化。

另请参阅

适用于

HttpException(String, Exception)

使用错误消息和 HttpException 属性初始化 InnerException 类的新实例。

public:
 HttpException(System::String ^ message, Exception ^ innerException);

public HttpException (string message, Exception innerException);

new System.Web.HttpException : string * Exception -> System.Web.HttpException

Public Sub New (message As String, innerException As Exception)

参数

message: String

当发生异常时向客户端显示的错误消息。

innerException: Exception

引发了当前异常的 InnerException（如果有）。

示例

下面的代码示例演示 HttpException 类 HttpException 的构造函数。该方法 CheckNumber 通过文本框接受用户输入的值，并检查它是否为整数。如果值不是整数，则会引发异常，然后在 catch 块 HttpException 中创建新对象并引发。该异常在事件处理程序中 Button_Click 捕获，并在浏览器中显示错误消息。

重要


<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>Example for HttpException</title>
<script language="C#" runat="server">    
         void CheckNumber()
         {
            try
            {
               // Check whether the value is an integer.
               String convertInt= textbox1.Text;
               Convert.ToInt32(convertInt);
            }
            catch(Exception e)
            {
               // Throw an HttpException object with a message.
               throw new HttpException("THe value entered in the text box is not a integer", e);
            }
         }
      
         void Button_Click(Object sender, EventArgs e)
         {
            try
            {
               CheckNumber();
               label1.Text = "The integer value you entered is: " + textbox1.Text;
            }
            catch(HttpException exp)
            {
               // Display the exception thrown.
               label1.Text = "<font color='red'>An HttpException was raised: " + exp.Message + "</font>";
               Exception myInnerException = exp.InnerException;
               label2.Text = "InnerException is : " + myInnerException.GetType();
            }
         }

         void page_load(Object sender,EventArgs e)
         {
            label1.Text="";
            label2.Text="";
         }
      </script>
   </head>

   <body>
      <center>
         <h3>Example for HttpException</h3>
      </center>
      <form id="Form1" method="post" runat="server">
         <center>
            <b>Enter the value in the text box </b>
            <br />
            <asp:TextBox Runat="server" ID="textbox1"></asp:TextBox>
            <br />
            <asp:Button Text="Click Here" OnClick="Button_Click" Runat="server" ID="Button1"></asp:Button>
            <br />
            <b>
               <asp:Label Runat="server" ID="label1"></asp:Label>
               <br />
               <asp:Label Runat="server" ID="label2"></asp:Label>
            </b>
         </center>
      </form>
   </body>
</html>


<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>Example for HttpException</title>
<script language="VB" runat="server">  
         Sub CheckNumber()
            Try
               ' Check whether the value is an integer.
               Dim convertInt As [String] = textbox1.Text
               Convert.ToInt32(convertInt)
            Catch e As Exception
               ' Throw an HttpException object with a message.
               Throw New HttpException("The value entered in the textbox is not a integer", e)
            End Try
         End Sub 'CheckNumber
       
         Sub Button_Click(sender As [Object], e As EventArgs)
            Try
               CheckNumber()
               label1.Text = "The integer value you entered is: " + textbox1.Text
            Catch exp As HttpException
               ' Display the exception thrown.
               label1.Text = "<font color='red'>An HttpException was raised!: " + exp.Message + "</font>"
               Dim myInnerException As Exception = exp.InnerException
               label2.Text = "InnerException is : " + myInnerException.GetType().ToString()
            End Try
         End Sub 'Button_Click
       
         Sub page_load(sender As [Object], e As EventArgs)
            label1.Text=""
            label2.Text="" 
         End Sub
      </script>
   </head>

   <body>
      <center>
      <h3>Example for HttpException</h3>
      <form id="WebForm9" method="post" runat="server">
         <b>Enter the value in the text box </b>
         <asp:TextBox Runat="server" ID="textbox1"></asp:TextBox>
         <br />
         <asp:Button Text="Click Here" OnClick="Button_Click" Runat="server" ID="Button1"></asp:Button>
         <br />
         <b>
         <asp:Label Runat="server" ID="label1"></asp:Label>
         <br />
         <asp:Label Runat="server" ID="label2"></asp:Label>
         </b>
      </form>
      </center>
   </body>
</html>

注解

处理异常时，捕获一系列相关异常非常有用，并引发外部异常以响应内部异常。

另请参阅

适用于

HttpException(String, Int32)

使用错误消息和异常代码初始化 HttpException 类的新实例。

public:
 HttpException(System::String ^ message, int hr);

public HttpException (string message, int hr);

new System.Web.HttpException : string * int -> System.Web.HttpException

Public Sub New (message As String, hr As Integer)

参数

message: String

当发生异常时向客户端显示的错误消息。

hr: Int32

定义错误的异常代码。

示例

下面的代码示例演示 HttpException 类 HttpException 的构造函数。 HttpException如果用户输入的值为 0，则会引发异常。

重要

if (Num == 0)
{
   throw new HttpException("No value entered", 100);
}

If Num = 0 Then
   Throw New HttpException("No value entered", 100)
end if

另请参阅

适用于

HttpException(Int32, String, Exception)

使用 HTTP 响应状态代码、错误消息以及 HttpException 属性初始化 InnerException 类的新实例。

public:
 HttpException(int httpCode, System::String ^ message, Exception ^ innerException);

public HttpException (int httpCode, string message, Exception innerException);

new System.Web.HttpException : int * string * Exception -> System.Web.HttpException

Public Sub New (httpCode As Integer, message As String, innerException As Exception)

参数

httpCode: Int32

在客户端上显示的 HTTP 响应状态代码。

message: String

当发生异常时向客户端显示的错误消息。

innerException: Exception

引发了当前异常的 InnerException（如果有）。

示例

下面的代码示例演示 HttpException 类 HttpException 的构造函数。该方法 CheckNumber 接受用户输入的值，并检查它是否为整数。如果值不是整数，则会引发异常，然后引发包含 HTTP 响应状态代码、异常消息和任何内部异常的新 HttpException 对象。该异常在事件处理程序中 Button_Click 捕获，并显示错误消息、错误代码和内部异常。

重要


<%@ Import Namespace="System.Drawing" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>Example for HttpException</title>
<script language="C#" runat="server">
         void CheckNumber()
         {
            try
            {
               // Check whether the value is an integer.
               String convertInt = textbox1.Text;
               Convert.ToInt32(convertInt);
            }
            catch(Exception ex)
            {
               // Throw an HttpException object that contains the HTTP error code,
               // message, and inner exception.
               throw new HttpException(500, "The entered value is not an integer.", ex);
            }
         }
         
         void Button_Click(Object sender, EventArgs e)
         {
            try
            {
               CheckNumber();
               label1.Text = "The integer value you entered is: " + textbox1.Text;
            }
            catch(HttpException exp)
            {
               // Display the exception thrown.
               label1.ForeColor = Color.Red;
               label1.Text = "An HttpException was raised!: " + exp.Message;
               Exception myInnerException = exp.InnerException;
               
               // Display the inner exception.
               label2.Text = "The InnerException is : " + myInnerException.GetType();
                
            }
         }
     
         void page_load(Object sender,EventArgs e)
         {
           label1.Text="";
           label2.Text="";
         }

      </script>
   </head>

   <body>
      <center>
         <h3>Example for HttpException</h3>
         <form id="WebForm9" method="post" runat="server">
            <b>Enter the value in the text box </b>
            <br />
            <asp:TextBox Runat="server" ID="textbox1"></asp:TextBox>
            <br />
            <asp:Button Text="Click Here" OnClick="Button_Click" Runat="server" ID="Button1"></asp:Button>
            <br />
            <b>
               <asp:Label Runat="server" ID="label1"></asp:Label>
               <br />
               <asp:Label Runat="server" ID="label2"></asp:Label>
            </b>
         </form>
      </center>
   </body>
</html>


<%@ Import Namespace="System.Drawing" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>Example for HttpException</title>
<script language="VB" runat="server">
         Sub CheckNumber()
            Try
               'Check whether the value is integer.
               Dim convertInt As [String] = textbox1.Text
               Convert.ToInt32(convertInt)
            Catch ex As Exception
               ' Throw an HttpException object that contains the HTTP error code,
               ' message, and inner exception.
               Throw New HttpException(500, "The entered value is not an integer.", ex)
            End Try
         End Sub
 
         Sub Button_Click(sender As [Object], e As EventArgs)
            Try
               CheckNumber()
               label1.Text = "The integer Value you entered is: " & textbox1.Text

            Catch exp As HttpException
               ' Display the Exception thrown.
               label1.ForeColor = Color.Red
               label1.Text = "An HttpException was raised: " & exp.Message

               Dim myInnerException As Exception = exp.InnerException

               ' Display the inner exception.
               label2.Text = "InnerException is : " & myInnerException.GetType().ToString()
                
            End Try
         End Sub 

         Sub page_load(sender As [Object], e As EventArgs)
            label1.Text = ""
            label2.Text = ""
         End Sub 
      </script>
   </head>

   <body>
      <center>
         <h3>Example for HttpException</h3>
         <form id="WebForm9" method="post" runat="server">
            <b>Enter the value in the text box.</b>
            <asp:TextBox Runat="server" ID="textbox1"></asp:TextBox>
            <br />
            <asp:Button Text="Click Here" OnClick="Button_Click" Runat="server" ID="Button1"></asp:Button>
            <br />
            <b>
            <asp:Label Runat="server" ID="label1"></asp:Label>
            <br />
            <asp:Label Runat="server" ID="label2"></asp:Label>
            </b>
         </form>
      </center>
   </body>
</html>

注解

处理异常时，捕获一系列相关异常非常有用，并引发外部异常以响应内部异常。

另请参阅

适用于

HttpException(Int32, String, Int32)

使用 HTTP 响应状态代码、错误消息和异常代码初始化 HttpException 类的新实例。

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

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

new System.Web.HttpException : int * string * int -> System.Web.HttpException

Public Sub New (httpCode As Integer, message As String, hr As Integer)

参数

httpCode: Int32

在客户端上显示的 HTTP 响应状态代码。

message: String

当发生异常时向客户端显示的错误消息。

hr: Int32

定义错误的异常代码。

示例

下面的代码示例演示 HttpException 类 HttpException 的构造函数。用户将在提供的文本框中输入用户名和电子邮件信息。如果任一文本框留空，则会创建并引发对象 HttpException 。 HttpException方法获取GetHttpCode错误代码，并在网页上显示。

重要


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>HttpException Example</title>
<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 email 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 />
         Email ID :
         <asp:TextBox ID="Textbox2" Runat="server"></asp:TextBox>
         <asp:Button ID="Button1" Text="Submit" OnClick="SubmitButton_Click" runat="server" />
         <br />
         <asp:label id="MyLabel" runat="server" />
      </form>
   </body>
</html>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>HttpException Example</title>
<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 email 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 Email
         <br /><br />
         User Name:
         <asp:TextBox ID="Textbox1" Runat="server"></asp:TextBox>
         <br />
         Email ID:
         <asp:TextBox ID="Textbox2" Runat="server"></asp:TextBox>
         <asp:Button ID="Button1" Text="Submit" OnClick="SubmitButton_Click" runat="server"/>
         <br />
         <asp:label id="MyLabel" runat="server"/>
      </form>
   </body>
</html>

另请参阅

适用于

HttpException 构造函数

定义

重载

HttpException()

示例

注解

另请参阅

适用于

HttpException(String)

参数

示例

另请参阅

适用于

HttpException(Int32, String)

参数

另请参阅

适用于

HttpException(SerializationInfo, StreamingContext)

参数

注解

另请参阅

适用于

HttpException(String, Exception)

参数

示例

注解

另请参阅

适用于

HttpException(String, Int32)

参数

示例

另请参阅

适用于

HttpException(Int32, String, Exception)

参数

示例

注解

另请参阅

适用于

HttpException(Int32, String, Int32)

参数

示例

另请参阅

适用于

其他资源