初学C#，请教下大家C#中用进度条来操作导出EXCEL时的显示

Question

问题提出：
在我的WINFORM中有一个查询页面需要将DATAGRIDVIEW中的数据导出到EXCEL，由于有时数据量比较大，程序假死很长时间，所以想到需要增加进度条来实时显示导出过程，到在同是主线程中使用进度条一样没有效果，程序依然假死状态，这时我想到了用委托和线程，到底应该把进度条放到单独线程还是把导出操作放到单独进程呢，还是两个都放到单独进程，应该怎么操作，请大家给下详细代码。以下是我现在的代码部分，应该如何改良呢，谢谢大家1.查询窗体中的导出按钮，点击此按钮调用一个公共基础类BaseClass.BaseOprate的导出方法datagridviewToExcel123
BaseClass.BaseOprate bs = new BaseClass.BaseOprate();
bs.datagridviewToExcel123(dataGridView1,saveFileDialog1);2，BaseOprate的导出方法datagridviewToExcel123        public void datagridviewToExcel123(DataGridView gridView, SaveFileDialog saveFileDialog)
        {
            if (gridView.Rows.Count == 0)
            {
                MessageBox.Show("没有数据可供导出！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                
                
            }
            else
            {
                saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
                saveFileDialog.FilterIndex = 0;
                saveFileDialog.RestoreDirectory = true;
                saveFileDialog.CreatePrompt = true;
                saveFileDialog.Title = "导出文件保存路径";
                saveFileDialog.ShowDialog();
                string strName = saveFileDialog.FileName;
                if (strName.Length != 0)
                {
                    
                    System.Reflection.Missing miss = System.Reflection.Missing.Value;
                    Microsoft.Office.Interop.Excel.ApplicationClass excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
                    excel.Application.Workbooks.Add(true); ;
                    excel.Visible = false;//若是true，则在导出的时候会显示EXcel界面。
                    if (excel == null)
                    {
                        MessageBox.Show("EXCEL无法启动！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                        
                    }
                    Microsoft.Office.Interop.Excel.Workbooks books = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;
                    Microsoft.Office.Interop.Excel.Workbook book = (Microsoft.Office.Interop.Excel.Workbook)(books.Add(miss));
                    Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)book.ActiveSheet;
                    sheet.Name = "test";                    //生成字段名称
                    for (int i = 0; i < gridView.ColumnCount; i++)
                    {
                        excel.Cells[1, i + 1] = gridView.Columns[i].HeaderText.ToString();
                    }
                    //填充数据
                    for (int i = 0; i < gridView.RowCount - 1; i++)
                    {
                        for (int j = 0; j < gridView.ColumnCount; j++)
                        {
                            if (gridView[j, i].Value == typeof(string))
                            {
                                excel.Cells[i + 2, j + 1] = "" + gridView[i, j].Value.ToString();
                            }
                            else
                            {
                                excel.Cells[i + 2, j + 1] = gridView[j, i].Value.ToString();
                            }
                        }
                      
                    }
                    sheet.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
                    book.Close(false, miss, miss);
                    books.Close();
                    excel.Quit();
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(books);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
                    GC.Collect();
                    MessageBox.Show("数据已经成功导出到：" + saveFileDialog.FileName.ToString(), "导出完成", MessageBoxButtons.OK, MessageBoxIcon.Information);
                                  }
            }
           
        }

Answer 1

private delegate void Client(); //定义代理private void ExportExcel()  //导出执行的方法
{
    Thread Export = new Thread(new ThreadStart(Pross));    Export.IsBackground = true;    Export.Start();            
}private void Pross()
{
    //.....导出的操作 
    Progr(i); //更改进度条的显示
}
private void Progr(int i) //更改进度条的显示
{
   if (this.progressBar1.InvokeRequired)//等待异步
   {
         Client cl = new Client(Progr);
         this.Invoke(cl, new object[] { i });//通过代理调用刷新方法
   }
   else
   {
         progressBar1.Value = i;
   }
}大概就是这样了

Answer 2

在填充数据的for循环中加Application.DoEvents(); 可以相应

Answer 3

//填充数据 
                    for (int i = 0; i < gridView.RowCount - 1; i++) 
                    { 
                        for (int j = 0; j < gridView.ColumnCount; j++) 
                        { 
                            if (gridView[j, i].Value == typeof(string)) 
                            { 
                                excel.Cells[i + 2, j + 1] = "" + gridView[i, j].Value.ToString(); 
                            } 
                            else 
                            { 
                                excel.Cells[i + 2, j + 1] = gridView[j, i].Value.ToString(); 
                            } 
                        }                      this.progressBar1.Value = i; 
                     Application.DoEvents();
                      
                    }