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CachedDataItem.SerializeDataInstance 方法

將資料序列化為 CachedDataItem 所表示的快取資料物件。

命名空間:  Microsoft.VisualStudio.Tools.Applications
組件:  Microsoft.VisualStudio.Tools.Applications.ServerDocument (在 Microsoft.VisualStudio.Tools.Applications.ServerDocument.dll 中)

語法

'宣告
Public Sub SerializeDataInstance ( _
    value As Object _
)
public void SerializeDataInstance(
    Object value
)

參數

  • value
    型別:System.Object
    物件,其中含有要儲存至資料快取之物件的資料。

備註

請使用 SerializeDataInstance 方法,初始化或修改快取資料物件的値。 這個方法會將 value 參數序列化為 CachedDataItem 所表示的快取資料物件。 若要變更複雜快取資料物件 (例如 DataSetDataTable) 中的特定資料值,請將快取資料的 XML 表示還原序列化為快取資料物件名稱的新執行個體,在這個複本中進行變更,然後再使用 SerializeDataInstance 方法序列化變更,使其還原為資料快取。 如需詳細資訊,請參閱 存取伺服器文件中的資料逐步解說:變更伺服器上的活頁簿快取資料

這個方法會使用 DiffGram 格式,將 DataSetDataTable 和具型別資料集物件序列化為資料快取。 這樣便可以確定在離線文件中,對資料快取所做的變更會正確地傳送到伺服器。

範例

下列程式碼範例會使用 SerializeDataInstance 方法修改 Excel 活頁簿工作表中快取的字串值。

這個範例需要:

  • 文件層級的自訂,適用於在 ExcelWorkbook1 命名空間中具有 Sheet1類別,以及在名為 CachedString 的 Sheet1 類別中具有快取字串的 Excel。

  • 主控台應用程式專案或其他非 Office 專案。

  • 下列組件的參考:

    • Microsoft.VisualStudio.Tools.Applications.ServerDocument.dll

    • Microsoft.VisualStudio.Tools.Applications.Runtime.dll

  • Microsoft.VisualStudio.Tools.ApplicationsMicrosoft.VisualStudio.Tools.Applications.Runtime 命名空間 (在程式碼檔最頂端) 的Imports (Visual Basic) 或 using (C#) 陳述式。

Private Sub ModifyCachedString(ByVal documentPath As String)
    Dim runtimeVersion As Integer = 0
    Dim serverDocument1 As ServerDocument = Nothing

    Try
        runtimeVersion = ServerDocument.GetCustomizationVersion(documentPath)
        If runtimeVersion <> 3 Then
            MessageBox.Show("This document does not have a Visual Studio Tools for Office " & _
                "customization, or it has a customization that was created with a version of " & _
                "the runtime that is incompatible with this version of the ServerDocument class.")
            Return
        End If

        If ServerDocument.IsCacheEnabled(documentPath) Then
            serverDocument1 = New ServerDocument(documentPath)
            Dim hostItem1 As CachedDataHostItem = _
                serverDocument1.CachedData.HostItems("ExcelWorkbook1.Sheet1")
            Dim dataItem1 As CachedDataItem = hostItem1.CachedData("CachedString")

            If dataItem1 IsNot Nothing AndAlso _
                Type.GetType(dataItem1.DataType).Equals(GetType(String)) Then

                dataItem1.SerializeDataInstance("This is the new cached string value.")
                serverDocument1.Save()
            End If
        Else
            MessageBox.Show("The specified document does not have cached data.")
        End If

    Catch ex As System.IO.FileNotFoundException
        System.Windows.Forms.MessageBox.Show("The specified document does not exist.")
    Catch ex As UnknownCustomizationFileException
        System.Windows.Forms.MessageBox.Show("The specified document has a file " & _
            "extension that is not supported by Visual Studio Tools for Office.")
    Finally
        If Not (serverDocument1 Is Nothing) Then
            serverDocument1.Close()
        End If
    End Try
End Sub
private void ModifyCachedString(string documentPath)
{
    int runtimeVersion = 0;
    ServerDocument serverDocument1 = null;

    try
    {
        runtimeVersion = ServerDocument.GetCustomizationVersion(documentPath);

        if (runtimeVersion != 3)
        {
            MessageBox.Show("This document does not have a Visual Studio Tools for " +
                "Office customization, or it has a customization that was created with " +
                "a version of the runtime that is incompatible with this version of the " +
                "ServerDocument class.");
            return;
        }

        if (ServerDocument.IsCacheEnabled(documentPath))
        {
            serverDocument1 = new ServerDocument(documentPath);
            CachedDataHostItem hostItem1 = 
                serverDocument1.CachedData.HostItems["ExcelWorkbook1.Sheet1"];
            CachedDataItem dataItem1 = hostItem1.CachedData["CachedString"];

            if (dataItem1 != null &&
                Type.GetType(dataItem1.DataType) == typeof(string))
            {
                dataItem1.SerializeDataInstance("This is the new cached string value.");
                serverDocument1.Save();
            }
        }
        else
        {
            MessageBox.Show("The specified document does not have cached data.");
        }
    }
    catch (System.IO.FileNotFoundException)
    {
        System.Windows.Forms.MessageBox.Show("The specified document does not exist.");
    }
    catch (UnknownCustomizationFileException)
    {
        System.Windows.Forms.MessageBox.Show("The specified document has a file " +
            "extension that is not supported by Visual Studio Tools for Office.");
    }
    finally
    {
        if (serverDocument1 != null)
            serverDocument1.Close();
    }
}

.NET Framework 安全性

請參閱

參考

CachedDataItem 類別

Microsoft.VisualStudio.Tools.Applications 命名空間

其他資源

存取伺服器文件中的資料