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小編給大家分享一下WinForm中預(yù)覽Office文件的方法,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
WinForm預(yù)覽Office文檔的方法,具體內(nèi)容如下
使用WinForm, WPF, Office組件
原理:使用Office COM組件將Word,Excel轉(zhuǎn)換為XPS文檔, 將WPF的DocumentViewer控件寄宿到WinForm中, 實(shí)現(xiàn)預(yù)覽.
1. 新建WinForm項(xiàng)目
2. 新建WPF用戶控件, 注意是WPF控件
3. 編輯WPF用戶控件
<UserControl ... ...> <Grid> <DocumentViewer x:Name="documentViewer"/> </Grid> </UserControl>
VS設(shè)計(jì)預(yù)覽顯示效果如下:
如果不需要自帶的工具欄, 可以添加以下資源隱藏工具欄:
<!--隱藏DocumentViewer邊框--> <UserControl.Resources> <Style x:Key="{x:Type DocumentViewer}" TargetType="{x:Type DocumentViewer}"> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}" /> <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" /> <Setter Property="FocusVisualStyle" Value="{x:Null}" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type DocumentViewer}"> <Border BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Focusable="False"> <Grid KeyboardNavigation.TabNavigation="Local"> <Grid.Background> <SolidColorBrush Color="{DynamicResource ControlLightColor}" /> </Grid.Background> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="*" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <ScrollViewer Grid.Row="1" CanContentScroll="true" HorizontalScrollBarVisibility="Auto" x:Name="PART_ContentHost" IsTabStop="true"> <ScrollViewer.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="{DynamicResource ControlLightColor}" Offset="0" /> <GradientStop Color="{DynamicResource ControlMediumColor}" Offset="1" /> </LinearGradientBrush> </ScrollViewer.Background> </ScrollViewer> </Grid> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> </UserControl.Resources>
4. 新建WinForm用戶控件
在WinForm上添加ElementHost
將WPF用戶控件添加到ElementHost上,設(shè)計(jì)器代碼XpsPreviewer.Designer.cs如下
//ElementHost private System.Windows.Forms.Integration.ElementHost elementHost1; //XpsPreviewer變量 private WPF.XpsPreviewer xpsPreviewer1; private void InitializeComponent() { this.elementHost1 = new System.Windows.Forms.Integration.ElementHost(); this.xpsPreviewer1 = new WPF.XpsPreviewer(); //初始化 //其他屬性初始化... this.elementHost1.Child = this.xpsPreviewer1; //其他屬性初始化... }
在XpsPreviewer.cs后臺(tái)代碼中定義方法:
/// <summary> /// 加載XPS文件 /// </summary> /// <param name="fileName">XPS文件名</param> internal void LoadXps(string fileName) { var xpsDocument = new XpsDocument(fileName, FileAccess.Read); this.xpsPreviewer1.documentViewer.Document = xpsDocument.GetFixedDocumentSequence(); xpsDocument.Close(); }
5. 將Excel(Word類似)轉(zhuǎn)換為XPS文件
通過(guò)Nuget包管理控制臺(tái)安裝COM組件:
PM> Install-Package Microsoft.Office.Interop.Excel
轉(zhuǎn)換為XPS:
/// <summary> /// 將Excel文件轉(zhuǎn)換為XPS文件 /// </summary> /// <param name="execelFileName">Excel文件名</param> /// <param name="xpsFileName">轉(zhuǎn)換的xps文件名</param> public void ConvertExcelToXps(string excelFileName, string xpsFileName) { if (string.IsNullOrWhiteSpace(excelFileName)) throw new ArgumentNullException(excelFileName); if (string.IsNullOrWhiteSpace(xpsFileName)) throw new ArgumentNullException(xpsFileName); var fileInfo = new FileInfo(xpsFileName); if (!fileInfo.Directory.Exists) fileInfo.Directory.Create(); //刪除已存在的文件 if (File.Exists(xpsFileName)) File.Delete(xpsFileName); Excel.Application app = new Excel.Application(); app.DisplayAlerts = false; Excel.Workbooks wbs; Excel.Workbook wb; wbs = app.Workbooks; wb = wbs.Add(excelFileName); dynamic Nothing = System.Reflection.Missing.Value; wb.ExportAsFixedFormat(Excel.XlFixedFormatType.xlTypeXPS, xpsFileName, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing); wb.Close(true); wbs.Close(); app.Quit(); KillExcelProcess(app); }
擴(kuò)展: 每次調(diào)用Excel打開(kāi)文件,均會(huì)產(chǎn)生一個(gè)進(jìn)程, 在網(wǎng)絡(luò)上收集的釋放Excel進(jìn)程方式均不起作用. 因此選擇直接結(jié)束進(jìn)程, 根據(jù)Excel句柄結(jié)束進(jìn)程, 而不是根據(jù)進(jìn)程名稱殺死全部正在運(yùn)行的Excel.
[DllImport("User32.dll")] private static extern int GetWindowThreadProcessId(IntPtr hWnd, out int ProcessId); /// <summary> /// 結(jié)束Excel進(jìn)程 /// </summary> /// <param name="obj"></param> private void KillExcelProcess(Excel.Application app) { if (app == null) return; try { IntPtr intptr = new IntPtr(app.Hwnd); int id; GetWindowThreadProcessId(intptr, out id); var p = Process.GetProcessById(id); p.Kill(); } catch { } }
現(xiàn)在已經(jīng)可以正常的預(yù)覽Excel文件了. 由于Excel另存為XPS文件會(huì)耗費(fèi)一定的時(shí)間, 因此建議在后臺(tái)線程中提前異步生成, 在預(yù)覽時(shí)可直接調(diào)取XPS文件.
以上是“WinForm中預(yù)覽Office文件的方法”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對(duì)大家有所幫助,如果還想學(xué)習(xí)更多知識(shí),歡迎關(guān)注億速云行業(yè)資訊頻道!
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