如何将 excel 工作表导出为图像？

Question

我正在尝试从 excel 工作表生成图像。 经过大量研究，我正在使用以下代码，但在某些时候出现异常：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Interop.Excel;

namespace ConsoleApplication1
{
    class Prueba
    {
        [STAThread]
        static void Main(string[] args)
        {
            var a = new Microsoft.Office.Interop.Excel.Application();

            try
            {
                Workbook w = a.Workbooks.Open(@"C:\SCRATCH\Libro2.xlsx");
                Worksheet ws = w.Sheets["Report"];
                ws.Protect(Contents: false);
                Range r = ws.Range["B2:H20"];
                r.CopyPicture(XlPictureAppearance.xlScreen, XlCopyPictureFormat.xlBitmap);
                a.DisplayAlerts = false;

                // System.Runtime.InteropServices.COMException Excepción de HRESULT: 0x80010105 (RPC_E_SERVERFAULT)
                ChartObject chartObj = ws.ChartObjects().Add(r.Left, r.Top, r.Width, r.Height); 

                chartObj.Activate();
                Chart chart = chartObj.Chart;
                chart.Paste();
                chart.Export(@"C:\SCRATCH\image.JPG", "JPG");
                chartObj.Delete();
                w.Close(SaveChanges: false);
            } 
            finally
            {
                a.Quit();                
            }

        }
    }
}

我正在使用 Office 2013，64 位，Windows 7 64 和 .Net 4.5。

Answer 1

这在WinForms项目中对我有用：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
using ios = System.Runtime.InteropServices;

namespace ClipBoardTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void ExportRangeAsJpg()
        {
            Excel.Application xl;

            xl = (Excel.Application)ios.Marshal.GetActiveObject("Excel.Application");

            if (xl == null)
            {
                MessageBox.Show("No Excel !!");
                return;
            }

            Excel.Workbook wb = xl.ActiveWorkbook;
            Excel.Range r = wb.ActiveSheet.Range["A1:E10"];
            r.CopyPicture(Excel.XlPictureAppearance.xlScreen,
                           Excel.XlCopyPictureFormat.xlBitmap);

             if (Clipboard.GetDataObject() != null)
            {
                IDataObject data = Clipboard.GetDataObject();

                if (data.GetDataPresent(DataFormats.Bitmap))
                {
                    Image image = (Image)data.GetData(DataFormats.Bitmap, true);
                    this.pict1.Image = image;
                    image.Save(@"C:\_Stuff\test\sample.jpg",
                        System.Drawing.Imaging.ImageFormat.Jpeg);
                }
                else
                {
                    MessageBox.Show("No image in Clipboard !!");
                }
            }
            else
            {
                MessageBox.Show("Clipboard Empty !!");
            }  
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ExportRangeAsJpg();
        }



    }
}

对于控制台应用程序，您还需要查看： http ： //blog.another-d-mention.ro/programming/c/use-clipboard-copypaste-in-c-console-application/

Answer 2

无需创建Chart对象。 在Range上调用CopyPicture()会将图像放在系统剪贴板上。 如果你愿意，你可以在两个步骤完成它：

        Workbook w = a.Workbooks.Open(@"C:\SCRATCH\Libro2.xlsx");
        Worksheet ws = w.Sheets["Report"];
        ws.Protect(Contents: false);
        Range r = ws.Range["B2:H20"];
        r.CopyPicture(XlPictureAppearance.xlScreen, XlCopyPictureFormat.xlBitmap);

        Bitmap image = new Bitmap(Clipboard.GetImage());
        image.Save(@"C:\SCRATCH\image.png");

        // charting code, replaced with the above 
               /* ChartObject chartObj = ws.ChartObjects().Add(r.Left, r.Top, r.Width, r.Height); 

                chartObj.Activate();
                Chart chart = chartObj.Chart;
                chart.Paste();
                chart.Export(@"C:\SCRATCH\image.JPG", "JPG");
                chartObj.Delete(); */

编辑：将所有错误检查和流控制留给您，但在尝试访问它的内容之前（至少）使用Clipboard类的ContainsImage()方法是明智的。

Answer 3

在VBA中可能更容易：

Sub PictureSaver()
    Dim ch As Chart
    Charts.Add
    Set ch = ActiveChart
    Sheets("Sheet4").Select
    Range("A1:D4").Select
    Selection.CopyPicture Appearance:=xlScreen, Format:=xlPicture
    ch.Select
    ch.Paste
    ch.Export Filename:="sample.jpg"
    Application.DisplayAlerts = False
        ch.Delete
    Application.DisplayAlerts = True
End Sub

Answer 4

                    //station--> excel file path
                    var app = new Microsoft.Office.Interop.Excel.Application();
                    var xls = app.Workbooks.Open(Station,false,true);
                    Microsoft.Office.Interop.Excel.Sheets sheets = xls.Worksheets;
                    for (int j = 1; j <= sheets.Count; j++)
                    {
                        Microsoft.Office.Interop.Excel.Worksheet sheet = sheets[j];
                        string startRange = "A1";
                        Microsoft.Office.Interop.Excel.Range endRange = sheet.Cells.SpecialCells(Microsoft.Office.Interop.Excel.XlCellType.xlCellTypeLastCell, Type.Missing);
                        Microsoft.Office.Interop.Excel.Range range = sheet.get_Range(startRange, endRange);
                        range.Rows.AutoFit();
                        range.Columns.AutoFit();
                        range.Copy();

                        BitmapSource image = Clipboard.GetImage();
                        FormatConvertedBitmap fcbitmap = new FormatConvertedBitmap(image, PixelFormats.Bgr32, null, 0);
                        using (var fileStream = new FileStream(AppDomain.CurrentDomain.BaseDirectory + j + ".jpg", FileMode.Create))
                        {
                            PngBitmapEncoder encoder = new PngBitmapEncoder();
                            encoder.Interlace = PngInterlaceOption.On;
                            encoder.Frames.Add(BitmapFrame.Create(fcbitmap));
                            encoder.Save(fileStream);
                        }
                        Set_Cavnas(AppDomain.CurrentDomain.BaseDirectory  +j + ".jpg");
                        File.Delete(AppDomain.CurrentDomain.BaseDirectory  +j + ".jpg");
                    }
                    //release resources
                    app.DisplayAlerts = false;
                    xls.Close(false);
                    app.Quit();
                    GC.Collect();

Answer 5

刚在工作中使用，可以看到效果 在此处输入图像描述 在此处输入图像描述