需要幫助來獲取簡單的方法來讀取XML

Question

需要幫助來獲取一個簡單的方法來讀取XML。 這是我已采取的步驟：

1. 添加了來自Microsoft Excel 12.0對象庫COM的引用。
2. 完全從其他來源復制的代碼http://csharp.net-informations.com/excel/csharp-read-excel.htm
3. 我要求這是方法而不是onclick事件的唯一區別。
4. 我得到的錯誤是錯誤10。代碼releaseObject(xlWorkSheet); releaseObject(xlWorkBook); releaseObject(xlApp);上的非靜態字段，方法或屬性需要對象引用releaseObject(xlWorkSheet); releaseObject(xlWorkBook); releaseObject(xlApp); releaseObject(xlWorkSheet); releaseObject(xlWorkBook); releaseObject(xlApp);

需要什么步驟？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel; 

namespace projectName
{
class frmReadXml
{

    public static void executeRead()
    {

        Excel.Application xlApp = new Excel.Application();
        Excel.Workbook xlWorkBook;
        Excel.Worksheet xlWorkSheet = new Excel.Worksheet();
        Excel.Range range;

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



        xlWorkBook = xlApp.Workbooks.Open("csharp.net-informations.xls", 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 (rCnt = 1; rCnt <= range.Rows.Count; rCnt++)
        {
            for (cCnt = 1; cCnt <= range.Columns.Count; cCnt++)
            {
                str = (string)(range.Cells[rCnt, cCnt] as Excel.Range).Value2;
                MessageBox.Show(str);
            }
        }

        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();
        }
    } 

}

}

Answer 1

因為您的功能：

public static void executeRead()

被聲明為static ，它只能訪問也定義為static其他函數。 刪除此函數上的static ，或將其添加到其他函數。 由於這些似乎都不訪問frmReadExcel任何類成員，因此建議您將它們全部靜態化。

Answer 2

使releaseObject成為static方法

private static void releaseObject(object obj)