ServerDocument.IsCacheEnabled 方法 (2007 system)

更新：2007 年 11 月

获取一个值，该值指示指定文档是否具有数据缓存。

命名空间：  Microsoft.VisualStudio.Tools.Applications
程序集：  Microsoft.VisualStudio.Tools.Applications.ServerDocument.v9.0（在 Microsoft.VisualStudio.Tools.Applications.ServerDocument.v9.0.dll 中）

语法

声明
Public Shared Function IsCacheEnabled ( _
    documentPath As String _
) As Boolean
用法
Dim documentPath As String
Dim returnValue As Boolean

returnValue = ServerDocument.IsCacheEnabled(documentPath)

public static bool IsCacheEnabled(
    string documentPath
)

参数

• documentPath
  类型：System.String

  要检查的文档的完整路径。

返回值

类型：System.Boolean

如果指定文档具有数据缓存，则为 true；否则为 false。

异常

备注

此方法仅指示文档是否具有数据缓存，而不指示数据缓存实际是否包含数据。如果文档具有数据缓存，但其中不包含数据，此方法仍返回 true。

示例

下面的代码示例创建一个新的 ServerDocument，然后使用 CachedData 属性显示数据缓存的内容。该示例首先使用 IsCacheEnabled 方法验证工作簿是否有数据缓存。

此示例需要在代码文件顶部使用对 Microsoft.VisualStudio.Tools.Applications.ServerDocument.v9.0.dll 和 Microsoft.VisualStudio.Tools.Applications.Runtime.v9.0.dll 程序集的引用，并对 Microsoft.VisualStudio.Tools.Applications 和 Microsoft.VisualStudio.Tools.Applications.Runtime 命名空间使用 Imports（对于 Visual Basic）或 using（对于 C#）语句。

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();
    }
}

权限

• 对直接调用方的完全信任。此成员不能由部分信任的代码使用。有关更多信息，请参见通过部分受信任的代码使用库。

另请参见

参考

ServerDocument 类

ServerDocument 成员

Microsoft.VisualStudio.Tools.Applications 命名空间