Cómo: Controlar excepciones generadas por un método de servicio Web
El siguiente ejemplo de código en el que un cliente llama a un método de servicio web detecta la excepción SoapException, producida por el método de servicio web. El cliente rellena a continuación una tabla HTML con las propiedades de la SoapException. Para consultar más información sobre cómo administrar errores de SOAP recibidos por clientes de servicios web, vea Control y Producción de Excepciones en servicios web de XML.
Ejemplo
<%@ Import Namespace="System.Web.Services.Protocols" %>
<%@ Import Namespace="System.Xml" %>
<%@ Page Language="vb" %>
<html>
<head>
<script runat=server language=vb>
Sub Page_Load(o As Object, e As EventArgs)
' Create a new instance of the Web service class.
Dim ThrowsSoapException As ThrowSoapException = New _
ThrowSoapException()
Try
ThrowsSoapException.myThrow()
Catch myerr As SoapException
' Populate the table with the exception details.
ErrorTable.Rows.Add(BuildNewRow("Fault Code Namespace", _
myerr.Code.Namespace))
ErrorTable.Rows.Add(BuildNewRow("Fault Code Name", _
myerr.Code.Name))
ErrorTable.Rows.Add(BuildNewRow( _
"SOAP Actor that threw Exception", myerr.Actor))
ErrorTable.Rows.Add(BuildNewRow("Error Message", _
myerr.Message))
ErrorTable.Rows.Add(BuildNewRow("Detail", _
HttpUtility.HtmlEncode(myerr.Detail.OuterXml) ))
Return
End Try
End Sub 'Page_Load
Function BuildNewRow(Cell1Text As String, Cell2Text As String) _
As HtmlTableRow
Dim row As New HtmlTableRow()
Dim cell1 As New HtmlTableCell()
Dim cell2 As New HtmlTableCell()
'Set the contents of the two cells.
cell1.Controls.Add(New LiteralControl(Cell1Text))
'Add the cells to the row.
row.Cells.Add(cell1)
cell2.Controls.Add(New LiteralControl(Cell2Text))
'Add the cells to the row.
row.Cells.Add(cell2)
Return row
End Function 'BuildNewRow
</script>
<head>
<body>
<table id="ErrorTable" CellPadding=5 CellSpacing=0 Border="1" BorderColor="black" />
</body>
<%@ Import Namespace="System.Web.Services.Protocols" %>
<%@ Import Namespace="System.Xml" %>
<%@ Page Language="C#" %>
<html>
<head>
<script runat=server language=c#>
void Page_Load(Object o, EventArgs e){
// Create a new instance of the Web service proxy class.
ThrowSoapException throwSoapException = new ThrowSoapException();
// Make a call to the Web service method, which throws an
// exception.
try
{
throwSoapException.myThrow();
}
catch (SoapException error)
{
// Populate the table with the exception details.
ErrorTable.Rows.Add(BuildNewRow("Fault Code Namespace",
error.Code.Namespace));
ErrorTable.Rows.Add(BuildNewRow("Fault Code Name",
error.Code.Name));
ErrorTable.Rows.Add(BuildNewRow(
"SOAP Actor that threw Exception", error.Actor));
ErrorTable.Rows.Add(BuildNewRow("Error Message",
error.Message));
ErrorTable.Rows.Add(BuildNewRow("Detail",
HttpUtility.HtmlEncode(error.Detail.OuterXml)));
return;
}
}
// This populates a row in an HtmlTable.
HtmlTableRow BuildNewRow(string Cell1Text, string Cell2Text) {
HtmlTableRow row = new HtmlTableRow();
HtmlTableCell cell1 = new HtmlTableCell();
HtmlTableCell cell2 = new HtmlTableCell();
//Set the contents of the two cells.
cell1.Controls.Add(new LiteralControl(Cell1Text));
//Add a cell to the row.
row.Cells.Add(cell1);
cell2.Controls.Add(new LiteralControl(Cell2Text));
//Add a cell to the row.
row.Cells.Add(cell2);
return row;
}
</script>
<head>
<body>
<table id="ErrorTable" CellPadding=5 CellSpacing=0 Border="1" BorderColor="black" />
</body>
Consulte también
Tareas
Cómo: Generar excepciones desde un servicio web creado con ASP.NET
Referencia
SoapException Class
SoapHeaderException Class
Conceptos
Controlar y generar excepciones en servicios web XML
Generar clientes de servicios web XML
Otros recursos
Handling and Throwing Exceptions
Servicios web XML con ASP.NET
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