Question

我正在尝试实现WPF打印功能。只要用户不想打印超过一页的打印，它就能正常工作。 My Application使用户可以在运行时创建xaml。现在我想让他打印出他创建的xaml控件。

我已经检查了所有xaml控件的总高度，由页面高度划分并取消了该数字，所以我知道我需要打印多少页。

接下来，我为每个页面创建一个FrameworkElements列表（参见下面的逻辑），并将每个List（每个列表代表一页）存储在一个数组中。

最后，我想创建一个包含每个页面的预览，并允许用户打印所有页面。为了做到这一点，我必须将页面放在一起文档，但我不知道如何。请看一下我的代码：

Package package = Package.Open("test.xps", FileMode.Create);

        // Create new xps document based on the package opened

        XpsDocument doc = new XpsDocument(package);

        // Create an instance of XpsDocumentWriter for the document

        XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(doc);

        // Write the canvas (as Visual) to the document

        double height = element.ActualHeight;
        double width = element.ActualWidth;
        System.Windows.Controls.PrintDialog printDlg = new System.Windows.Controls.PrintDialog();
        Size pageSize = new Size(printDlg.PrintableAreaWidth, printDlg.PrintableAreaHeight);
        int pageCount = (int)Math.Ceiling(height / pageSize.Height);


        if (pageSize.Height < height) {
            var grid = element as Grid;
            var children = grid.Children;
            List<FrameworkElement>[] pages = new List<FrameworkElement>[pageCount-1];
            int i = 0;
            double currentHeight = 0;

            foreach (FrameworkElement c in children) {


                currentHeight += c.RenderSize.Height;


                if (currentHeight < pageSize.Height) {

                    pages[i] = new List<FrameworkElement>();
                    pages[i].Add(c);
                }
                else {
                    i++;
                    currentHeight = 0;
                    pages[i] = new List<FrameworkElement>();
                    pages[i].Add(c);
                }
            }
            for (int j = 0; j < pageCount; j++) {
                var collator = writer.CreateVisualsCollator();
                collator.BeginBatchWrite();
                foreach (FrameworkElement c in pages[j]) {


                    collator.Write(c);


                }
                collator.EndBatchWrite();
            }
        }


        doc.Close();

        package.Close();

        string filename = @"C:\Users\rzimmermann\Documents\Visual Studio 2012\Projects\MvvmLightPrintFunction\MvvmLightPrintFunction\bin\Debug\test.xps";

        DocumentViewer viewer = new DocumentViewer();

        doc = new XpsDocument(filename, FileAccess.Read);

        viewer.Document = doc.GetFixedDocumentSequence();

        Window ShowWindow = new Window();

        ShowWindow.Width = 400;

        ShowWindow.Height = 300;

        ShowWindow.Content = viewer;

        ShowWindow.Show();

非常感谢你。

Answer 1

@kenny是对的，你需要使用FixedPages。有关精彩的教程请求请参阅：http://www.nbdtech.com/Blog/archive/2009/04/20/wpf-printing-part-2-the-fixed-document.aspx

就向文档添加页面而言，您可以这样做：

doc.Pages.Add(page1Content);
doc.Pages.Add(page2Content);

//等。

Answer 2

2019-09-12 15:29:50.576 4555-4555/it.eng.ds.poc.gamepadtestapplication V/EVENT: Event type [Motion] - x [1.0 y [-0.003921509] event [MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=1.0, y[0]=-0.003921509, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=2, eventTime=1437191, downTime=0, deviceId=5, source=0x1000010 }]
2019-09-12 15:29:50.576 4555-4555/it.eng.ds.poc.gamepadtestapplication V/EVENT: Event type [Down] - code [22] event [{KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_DPAD_RIGHT, scanCode=0, metaState=0, flags=0x400, repeatCount=0, eventTime=1437191, downTime=1437191, deviceId=5, source=0x1000010 }}]
2019-09-12 15:29:51.016 4555-4555/it.eng.ds.poc.gamepadtestapplication V/EVENT: Event type [Motion] - x [0.85882366 y [-0.003921509] event [MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=0.85882366, y[0]=-0.003921509, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=1437627, downTime=0, deviceId=5, source=0x1000010 }]
2019-09-12 15:29:51.036 4555-4555/it.eng.ds.poc.gamepadtestapplication V/EVENT: Event type [Motion] - x [0.27058828 y [-0.003921509] event [MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=0.27058828, y[0]=-0.003921509, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=3, eventTime=1437651, downTime=0, deviceId=5, source=0x1000010 }]
2019-09-12 15:29:51.036 4555-4555/it.eng.ds.poc.gamepadtestapplication V/EVENT: Event type [Up] - code [22] event [{KeyEvent { action=ACTION_UP, keyCode=KEYCODE_DPAD_RIGHT, scanCode=0, metaState=0, flags=0x400, repeatCount=0, eventTime=1437651, downTime=1437651, deviceId=5, source=0x1000010 }}]
2019-09-12 15:29:51.056 4555-4555/it.eng.ds.poc.gamepadtestapplication V/EVENT: Event type [Motion] - x [0.003921628 y [-0.003921509] event [MotionEvent { action=ACTION_MOVE, actionButton=0, id[0]=0, x[0]=0.003921628, y[0]=-0.003921509, toolType[0]=TOOL_TYPE_UNKNOWN, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=1, eventTime=1437663, downTime=0, deviceId=5, source=0x1000010 }]

this.scrollCheckCardinfo是一个网格。

wpf打印多页xaml控件

2 个答案: