excel转图片（通过单元格截取图片）

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 System.Diagnostics;

namespace excel转图片
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            KillProgram();
            GetExcel(@"D:\test\1.xls");
        }

        public static void KillProgram()
        {
            foreach (Process process in Process.GetProcesses())
            {
                if (process.ProcessName == "Excel") //要结束程序的名称
                {
                    process.Kill();
                }
            } 
            
        }


        public static string GetExcel(string excelFilePath)
        {
            string SaveExcelJPG = @"D:\test\1.jpg";
            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];


                    object ranobj = DBNull.Value;

                    //设置选择单元格，在复制出来。
                    wsheet.get_Range("A1", "AA22").Copy(ranobj);

                    //全选单元格，全部复制出来。
                    //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;
        }


    }
}