CachedDataItem الفئة

مقالة
09/21/2010

يمثل كائن بيانات المخزنة مؤقتاً في تخصيص المستوى المستندات التي تم إنشاؤها باستخدام أدوات تطوير المكتب في ‏‫Visual Studio.

مساحة الاسم: Microsoft.VisualStudio.Tools.Applications
التجميع: Microsoft.VisualStudio.Tools.Applications.ServerDocument (في Microsoft.VisualStudio.Tools.Applications.ServerDocument.dll)

بناء الجملة

'إقرار
<PermissionSetAttribute(SecurityAction.Demand, Name := "FullTrust")> _
Public NotInheritable Class CachedDataItem _
    Inherits CachedDataNodeBase

[PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
public sealed class CachedDataItem : CachedDataNodeBase

ملاحظات

لمزيد من المعلومات حول تخزين مؤقت للبيانات في مستند-المستوى التخصيصات، راجع بيانات التخزين المؤقتو الوصول إلى البيانات في المستندات على خادم.

أمثلة

يلي تعليمات برمجية المثال بفحص كل CachedDataItemمؤقتاً في ذاكرة تخزين مؤقت لبيانات من مصنف Excel وعروض اسم كل كائن بيانات.

يتطلب هذا المثال:

مشروع تطبيقات وحدة تحكم أو بعض المشاريع بخلاف المكتب الأخرى.
مراجع إلى تجميعات التالية:
- Microsoft.VisualStudio.أدوات.Applications.ServerDocument.dll و Microsoft.VisualStudio.أدوات.Applications.وقت التشغيل.dll (إذا كان مشروع تستهدف .NET Framework 4).
  
  أو
- Microsoft.VisualStudio.أدوات.Applications.ServerDocument.v10.0.dll و Microsoft.VisualStudio.أدوات.Applications.وقت التشغيل.v9.0.dll (إذا كان مشروع تستهدف 3.5 إطار عمل.NET).
Imports (for Visual Basic) or using (for C#) statements for Microsoft.VisualStudio.Tools.Applications and Microsoft.VisualStudio.Tools.Applications.Runtime namespaces at the top of your code file.

Private Sub DisplayDataCacheContents(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 stringBuilder1 As New System.Text.StringBuilder()

            ' Display all of the cached data items 
            ' in the document.
            Dim hostItem1 As CachedDataHostItem
            For Each hostItem1 In serverDocument1.CachedData.HostItems
                stringBuilder1.Append(vbLf & "Namespace and class: ")
                stringBuilder1.Append(hostItem1.Id & vbLf)
                Dim dataItem1 As CachedDataItem
                For Each dataItem1 In hostItem1.CachedData
                    stringBuilder1.Append("     Data item: ")
                    stringBuilder1.Append(dataItem1.Id & vbLf)
                Next dataItem1
            Next hostItem1
            MessageBox.Show(stringBuilder1.ToString())
        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 DisplayDataCacheContents(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);
            System.Text.StringBuilder stringBuilder1 =
                new System.Text.StringBuilder();

            // Display all of the cached data items 
            // in the document.
            foreach (CachedDataHostItem hostItem1 in
                serverDocument1.CachedData.HostItems)
            {
                stringBuilder1.Append("\nNamespace and class: ");
                stringBuilder1.Append(hostItem1.Id + "\n");
                foreach (CachedDataItem dataItem1 in
                    hostItem1.CachedData)
                {
                    stringBuilder1.Append("     Data item: ");
                    stringBuilder1.Append(dataItem1.Id + "\n");
                }
            }
            MessageBox.Show(stringBuilder1.ToString());
        }
        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();
    }
}