是否可以通过内存从Excel导入数据?

时间:2016-10-04 19:24:19

标签: c# excel memory import process

说打开一个新的Excel文件并输入数据。外部C#应用程序是否可以挂钩到Excel进程并从中获取数据?此外,Excel文件永远不会保存到文件中。

这难以做到,而且你能指出我如何实现这个目标的正确方向。

1 个答案:

答案 0 :(得分:0)

只需在Windows窗体应用程序后面的代码中添加此代码,该窗体应用程序上添加了一个名为“button1”的按钮。此示例代码将遍历Excel文件的单元格,并在消息框中显示每个单元格的内容。当然,需要项目引用“Microsoft.Office.Interop.Excel”。

不要忘记实际创建excel文件,在本例中我使用了这个路径“C:\ ExcelData \ DataToImp.xlsx”。

using Excel = Microsoft.Office.Interop.Excel;


    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Excel.Application xlApp;
        Excel.Workbook xlWorkBook;
        Excel.Worksheet xlWorkSheet;
        Excel.Range range;

        string str;
        int rCnt = 0;
        int cCnt = 0;

        xlApp = new Excel.Application();
        xlWorkBook = xlApp.Workbooks.Open("C:\\ExcelData\\DataToImp.xlsx", 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

        range = xlWorkSheet.UsedRange;

        for (int rowIndex = 1; rowIndex <= range.Rows.Count; rowIndex++)
        {
            for (int columnIndex = 1; columnIndex <= range.Columns.Count; columnIndex++)
            {
                Excel.Range rangeTest = range.Cells[rowIndex, columnIndex] as Excel.Range;

                if (rangeTest.MergeCells)// && rangeTest.Value2 == null)
                {
                    //continue;

                    int columns = rangeTest.Columns.Count;
                    columnIndex += columns;
                }

                MessageBox.Show("m " + (string)rangeTest.Value2);

            }
        }

        xlWorkBook.Close(true, null, null);
        xlApp.Quit();

        releaseObject(xlWorkSheet);
        releaseObject(xlWorkBook);
        releaseObject(xlApp);
    }

    private void releaseObject(object obj)
    {
        try
        {
            System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
            obj = null;
        }
        catch (Exception ex)
        {
            obj = null;
            MessageBox.Show("Unable to release the Object " + ex.ToString());
        }
        finally
        {
            GC.Collect();
        }
    }