Aktualisieren von Daten

This example shows how to retrieve updated data from external data sources for the open workbook by using the Refresh method. The Excel Web Services signature for the Refresh method is as follows:

public Status[] Refresh (string sessionId, string connectionName)

Public Function Refresh(ByVal sessionId As String, ByVal connectionName As String) As Status()
End Function

If you link directly to Microsoft.Office.Excel.Server.WebServices.dll, the signature for the Refresh method is:

public void Refresh (string sessionId, string connectionName,
    out Status[] status)

Public Sub Refresh(ByVal sessionId As String, ByVal connectionName As String, <System.Runtime.InteropServices.Out()> ByRef status() As Status)
End Sub

Das connectionName Argument verweist auf den Verbindungsnamen in einer Microsoft Office Excel 2007-Arbeitsmappe. Sie können die Refresh-Methode verwenden, um eine einzelne Datenverbindung in der Arbeitsmappe zu aktualisieren oder alle Verbindungen zu aktualisieren. This is useful particularly when the connections are created without refresh-on-open functionality.When you refresh a connection, the data and all objects using the connection will be refreshed. To refresh all available connections in the workbook, you pass in an empty connection string or null for the connection name argument.The refresh operations will be attempted regardless of the type of authentication used, without any further confirmation or prompt.For more information about the Refresh method, see the Excel Web Services reference documentation.

Beispiel

The following code sample shows how to call the Refresh method using Excel Web Services. The connection name in this example is "MyInventoryConnection":

// Instantiate the Web service.
ExcelService xlservice = new ExcelService();
Status[] outStatus;
RangeCoordinates rangeCoordinates = new RangeCoordinates();
string sheetName = "Sheet3";

// Set the path to the workbook to open.
// TODO: Change the path to the workbook
// to point to a workbook you have access to.
// The workbook must be in a trusted location.
string targetWorkbookPath = 
    http://myserver02/example/Shared%20Documents/Book1.xlsx";
            
// Set credentials for requests.
xlservice.Credentials = System.Net.CredentialCache.DefaultCredentials;

// Call open workbook, and point to the trusted   
// location of the workbook to open.
string sessionId = xlservice.OpenWorkbook(targetWorkbookPath, "en-US", "en-US", out outStatus);
 
// Prepare object to define range coordinates.
rangeCoordinates.Column = 0;
rangeCoordinates.Row = 0;
rangeCoordinates.Height = 8;
rangeCoordinates.Width = 10;

// Set the cell located in the first row and 
// ninth column to 300.
xlservice.SetCell(sessionId, sheetName, 0, 8, 300); 
xlservice.Refresh(sessionId, "MyInventoryConnection");

' Instantiate the Web service.
Dim xlservice As New ExcelService()
Dim outStatus() As Status
Dim rangeCoordinates As New RangeCoordinates()
Dim sheetName As String = "Sheet3"

' Set the path to the workbook to open.
' TODO: Change the path to the workbook
' to point to a workbook you have access to.
' The workbook must be in a trusted location.
' Set credentials for requests.
Dim targetWorkbookPath As String = http: xlservice.Credentials = System.Net.CredentialCache.DefaultCredentials 'myserver02/example/Shared%20Documents/Book1.xlsx";

' Call open workbook, and point to the trusted   
' location of the workbook to open.
Dim sessionId As String = xlservice.OpenWorkbook(targetWorkbookPath, "en-US", "en-US", outStatus)

' Prepare object to define range coordinates.
rangeCoordinates.Column = 0
rangeCoordinates.Row = 0
rangeCoordinates.Height = 8
rangeCoordinates.Width = 10

' Set the cell located in the first row and 
' ninth column to 300.
xlservice.SetCell(sessionId, sheetName, 0, 8, 300)
xlservice.Refresh(sessionId, "MyInventoryConnection")

If you link directly to Microsoft.Office.Excel.Server.WebServices.dll, the equivalent code is:

// Instantiate the ExcelService class.
ExcelService xlservice = new ExcelService();
Status[] outStatus;
RangeCoordinates rangeCoordinates = new RangeCoordinates();
string sheetName = "Sheet3";

// Set the path to the workbook to open.
// TODO: Change the path to the workbook
// to point to a workbook you have access to.
// The workbook must be in a trusted location.
string targetWorkbookPath = 
    http://myserver02/example/Shared%20Documents/Book1.xlsx";
            
// Call the open workbook, and point to the trusted 
// location of the workbook to open.
string sessionId = xlservice.OpenWorkbook(targetWorkbookPath, "en-US", "en-US", out outStatus);
                
// Set the cell located in the first row and 
// ninth column to 300.
xlservice.SetCell(sessionId, sheetName, 0, 8, 300, out outStatus); 
xlservice.Refresh(sessionId, "MyInventoryConnection", out outStatus);

byte[] workbook = xlService.GetWorkbook(sessionId, WorkbookType.FullWorkbook, out status);

// Write the resulting Excel file to stdout 
// as a binary stream.
BinaryWriter binaryWriter = 
    new BinaryWriter(Console.OpenStandardOutput());
binaryWriter.Write(workbook);
binaryWriter.Close();
...
...

' Instantiate the ExcelService class.
Dim xlservice As New ExcelService()
Dim outStatus() As Status
Dim rangeCoordinates As New RangeCoordinates()
Dim sheetName As String = "Sheet3"

' Set the path to the workbook to open.
' TODO: Change the path to the workbook
' to point to a workbook you have access to.
' The workbook must be in a trusted location.
' Call the open workbook, and point to the trusted 
' location of the workbook to open.
Dim targetWorkbookPath As String = http: String sessionId = xlservice.OpenWorkbook(targetWorkbookPath, "en-US", "en-US", outStatus) 'myserver02/example/Shared%20Documents/Book1.xlsx";

' Set the cell located in the first row and 
' ninth column to 300.
xlservice.SetCell(sessionId, sheetName, 0, 8, 300, outStatus)
xlservice.Refresh(sessionId, "MyInventoryConnection", outStatus)

Dim workbook() As Byte = xlService.GetWorkbook(sessionId, WorkbookType.FullWorkbook, status)

' Write the resulting Excel file to stdout 
' as a binary stream.
Dim binaryWriter As New BinaryWriter(Console.OpenStandardOutput())
binaryWriter.Write(workbook)
binaryWriter.Close()
...
...

Siehe auch

Aufgaben

How to: Trust a Location

How to: Save from Excel Client to the Server

How to: Get an Entire Workbook or a Snapshot

Konzepte

Zugriff auf die SOAP-API

Warnungen in Excel Services

Excel Services Known Issues and Tips

Loop-Back SOAP Calls and Direct Linking

Sonstige Ressourcen

Schritt für Schritt: Entwickeln einer benutzerdefinierten Anwendung mit Excel Web Services