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 DataSet 或 DataTable) 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和 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 DataSet、DataTable 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.Applications 和 Microsoft.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
- 完全信任立即呼叫者。這個成員無法供部分信任的程式碼使用。如需詳細資訊,請參閱從部分受信任程式碼使用程式庫。
請參閱
參考
Microsoft.VisualStudio.Tools.Applications 命名空間