求解,沒辦法,轉不成功
以下我的code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using EXCEL = Microsoft.Office.Interop.Excel;
using System.IO;

namespace _5_23_excel__to_jpg
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
///
/// Excel文檔Jpg圖片
///
public class ConvertEXCEL
{
///
/// 圖片保存路徑。System.IO.Path.GetTempPath() + @"cache{0}.jpg"
///
private static string SAVEEXCELJPG = @"D:\DocToImg\666{0}.jpg";
///
/// 暫時網頁保存文件路徑
/// Path.GetTempPath() + @"cache{0}.htm"
///
private static string TEMPHTMLPATH = @"D:\DocToImg\666\Excel.htm";

        /// <summary>
        /// Excel文檔轉換成JPG圖片文件
        /// </summary>
        /// <param name="excelPath">Excel文件路徑</param>
        /// <returns>JPG圖片路徑</returns>
        public static string EXCELConvertImage(string excelPath)
        {
            EXCEL.Application appExcel = new Microsoft.Office.Interop.Excel.Application();
            appExcel.Visible = false;
            object obj = Type.Missing;
            object fileHtml = TEMPHTMLPATH;
            object format = EXCEL.XlFileFormat.xlHtml;
            EXCEL.Workbook xls = appExcel.Workbooks.Open(excelPath, obj, obj, obj, obj, obj, obj, obj, obj, obj, obj, obj, obj, obj, obj);

            xls.SaveAs(fileHtml, format, obj, obj, obj, obj, EXCEL.XlSaveAsAccessMode.xlExclusive, obj, obj, obj, obj, obj);
            appExcel.Quit();
            string HTMLImage = ConvertHTML.HTMLConvertImage(fileHtml.ToString());
            DeleteTempFile(fileHtml.ToString());
            return HTMLImage;
        }

        public static string GetExcel(string excelFilePath)
        {
            EXCEL.Application app = new Microsoft.Office.Interop.Excel.Application();
            object objMis = Type.Missing;
            EXCEL.Workbook singleExcel = app.Workbooks.Open(excelFilePath, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis, objMis);
            try
            {
                //wsheet.UsedRange.Select();
                for (int i = 1; i <= singleExcel.Worksheets.Count; i++)
                {
                    EXCEL.Worksheet wsheet = (EXCEL.Worksheet)singleExcel.Worksheets[i];

                    //Clipboard.Clear();

                    object ranobj = DBNull.Value;

                    //設置選擇單元格,在複製出來,Excel轉換成圖片的操作方法
                    wsheet.get_Range("A1", "D3").Copy(ranobj);
                    //全選單元格，全部複製出来。Excel轉換成圖片的操作方法。
                  
                    //wsheet.UsedRange.Copy(objMis);
                    //Clipboard.SetDataObject(objMis);
                    IDataObject iData = Clipboard.GetDataObject();
                    Bitmap bits = (Bitmap)iData.GetData(DataFormats.Bitmap);
                    Bitmap myBitmap = new Bitmap(bits.Width, bits.Height);
                    Graphics g = Graphics.FromImage(myBitmap);
                    g.DrawImage(bits, 0, 0);
                    myBitmap.Save(string.Format(SAVEEXCELJPG, Guid.NewGuid()));

                    Clipboard.Clear();
                    myBitmap.Dispose();
                    bits.Dispose();
                }

            }
            catch (Exception Excel)
            {
                throw Excel;
            }
            finally
            {
                singleExcel.Close(objMis, objMis, objMis);
                app.Quit();
            }
            return string.Empty;
        }

        /// <summary>  
        /// 刪除指定的臨時文件
        /// </summary>
        /// <param name="filePath"></param>
        private static void DeleteTempFile(string filePath)
        {
            File.Delete(filePath);
        }
    }
}

}
參考:
http://www.cnblogs.com/lyl6796910/archive/2013/01/24/2875799.html