C# 导出到Excel保持文件打开，而不导出第一个datagrid

我正在尝试将2个DataGridView导出到excel，但这两组数据网格视图都缺少最后一行数据，我已检查了代码，看不出我做错了什么？此外，它还在导出时创建临时文件，然后锁定该文件，而不是正常退出，只有重新启动才能删除该文件？任何帮助都将是伟大的代码如下。例如，如果我另存为test.xlsx，我会得到两个文件~$test.xlsx和test.xlsx，这两个文件都被锁定

  private void exprtbtn_Click(object sender, EventArgs e)
    {

        Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
        Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
        try
        {

            // creating new Excelsheet in workbook
            Microsoft.Office.Interop.Excel._Worksheet worksheet1 = null;
            Microsoft.Office.Interop.Excel._Worksheet worksheet2 = null;

            // get the reference of first sheet. By default its name is Sheet1.
            // store its reference to worksheet
            worksheet1 = workbook.Sheets["Sheet1"];
            worksheet1 = workbook.ActiveSheet;

            // changing the name of active sheet
            worksheet1.Name = "Switch Totals";


            // storing header part in Excel
            for (int i = 1; i < switchtotalgrd.Columns.Count + 1; i++)
            {
                worksheet1.Cells[1, i] = switchtotalgrd.Columns[i - 1].HeaderText;
            }

            // storing Each row and column value to excel sheet
            for (int i = 0; i < switchtotalgrd.Rows.Count - 1; i++)
            {
                for (int j = 0; j < switchtotalgrd.Columns.Count; j++)
                {
                    worksheet1.Cells[i + 2, j + 1] = switchtotalgrd.Rows[i].Cells[j].Value.ToString();
                }
            }
            // Adding second worksheet
            int count = workbook.Worksheets.Count;
            Excel.Worksheet addedSheet = workbook.Worksheets.Add(Type.Missing,
            workbook.Worksheets[count], Type.Missing, Type.Missing);


            // get the reference of first sheet. By default its name is Sheet1.
            // store its reference to worksheet
            worksheet2 = workbook.Sheets["Sheet2"];
            worksheet2 = workbook.ActiveSheet;

            // changing the name of active sheet
            worksheet2.Name = "Itemised Extn";


            // storing header part in Excel
            for (int i = 1; i < fullresult.Columns.Count + 1; i++)
            {
                worksheet2.Cells[1, i] = fullresult.Columns[i - 1].HeaderText;
            }

            // storing Each row and column value to excel sheet

            for (int i = 0; i < fullresult.Rows.Count - 1; i++)
            {
                for (int j = 0; j < fullresult.Columns.Count; j++)
                {
                    if (fullresult.Rows[i].Cells[j].Value == null)
                    {
                        fullresult.Rows[i].Cells[j].Value = "NA";
                    }
                    worksheet2.Cells[i + 2, j + 1] = fullresult.Rows[i].Cells[j].Value.ToString();
                }
            }

            // save the application
            string fileName = String.Empty;
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "Excel files |*.xls|All files (*.*)|*.*";
            saveFileDialog1.FilterIndex = 2;
            saveFileDialog1.RestoreDirectory = true;

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                fileName = saveFileDialog1.FileName;
                workbook.SaveAs(fileName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
            }
            else
                return;
        }
            //Catch all errors.
        catch (System.Exception)
        { 
        }
        finally
        {
            workbook = null;
            app = null;
        }
    }

private void exprtbtn\u单击（对象发送方，事件参数e）
{
Microsoft.Office.Interop.Excel.\u应用程序app=新的Microsoft.Office.Interop.Excel.Application（）；
Microsoft.Office.Interop.Excel.\u工作簿=app.Workbooks.Add（Type.Missing）；
尝试
{
//在工作簿中创建新的Excel工作表
Microsoft.Office.Interop.Excel.\u工作表1=null；
Microsoft.Office.Interop.Excel.\u工作表工作表2=null；
//获取第一张图纸的引用。默认情况下，其名称为Sheet1。
//将其引用存储到工作表
工作表1=工作簿.工作表[“工作表1”]；
worksheet1=工作簿.ActiveSheet；
//更改活动图纸的名称
工作表1.Name=“开关总计”；
//在Excel中存储标题部分
对于（int i=1；i

您可能需要再次检查外部for循环，例如，

for（int i=0；i

，它是否应该使用小于等于

由于您使用的是Excel com互操作，因此需要调用此方法才能在使用完资源后释放该资源

一个好的做法是使用try{…}catch{…}finally{…}，并在finally块中释放com对象

谢谢你，是的，设置为