在讀取大型Excel工作表時優化內存

Question

我確實有一個excel文件，我開發了一種讀取工作表1中所有內容並將其填充到列表視圖的方法，基本上工作表在AD單元格中都有數據。 但數字是120,000。 當我運行代碼時，它確實會讀取這些文件，需要花費一些時間，但是在此過程中，對窗體進行的任何操作（例如最小化或單擊窗體的任何位置）都會凍結程序並導致程序崩潰。 我怎樣才能像任何好的程序一樣提高性能。 這是我的下面的代碼。

   private void button1_Click(object sender, EventArgs e)
    {
        Microsoft.Office.Interop.Excel.Application ExcelObj = new 
        Microsoft.Office.Interop.Excel.Application();
        OpenFileDialog openFileDialog1 = new OpenFileDialog();
         // prepare open file dialog to only search for excel files (had 
        //  trouble setting this in design view)

         openFileDialog1.FileName = "*.xlsx";
         if (openFileDialog1.ShowDialog() == DialogResult.OK)
         {
             // Here is the call to Open a Workbook in Excel 
            // It uses most of the default values (except for the read-only 
           // which we set to true)

                Workbook theWorkbook =   
                ExcelObj.Workbooks.Open(openFileDialog1.FileName, 0, true, 
                5,"", "", true,  XlPlatform.xlWindows, "\t", false, false, 
                0, true);


            // get the collection of sheets in the workbook

               Sheets sheets = theWorkbook.Worksheets;

            // get the first and only worksheet from the collection of 
           //  worksheets

            Worksheet worksheet = (Worksheet)sheets.get_Item(1);

            // loop through 10 rows of the spreadsheet and place each row in 
            // the list view

            for (int i = 1; i <= 10; i++)
            {
                Range range = worksheet.get_Range("A" + i.ToString(), "J" + 
                i.ToString());
                System.Array myvalues = (System.Array)range.Cells.Value;
                string[] strArray = ConvertToStringArray(myvalues);
                listView1.Items.Add(new ListViewItem(strArray));
            }
        }

    }


       string[] ConvertToStringArray(System.Array values)
           {
        // create a new string array

        string[] theArray = new string[values.Length];

         // loop through the 2-D System.Array and populate the 1-D String 
        // Array

        for (int i = 1; i <= values.Length; i++)
        {
            if (values.GetValue(1, i) == null)
                theArray[i - 1] = "";
            else
                theArray[i - 1] = (string)values.GetValue(1, i).ToString();
        }
        return theArray;
    }

Answer 1

• 除了互操作之外，我建議使用OpenXML（ https://github.com/OfficeDev/Open-XML-SDK ）
• 並使用諸如BackgroundWorker之類的東西在后台讀取文件（ https://msdn.microsoft.com/zh-cn/library/system.componentmodel.backgroundworker(v=vs.110).aspx ）