我是C＃的新手我已经编写了以下代码来从C＃读取Excel，并且在读取单元格时会抛出错误。
以下是代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Microsoft.Office.Interop.Excel;
using System.IO;
using System.Reflection;
namespace BasicFramework.DatabankController
{
public class DatabankController<K,V> : Dictionary<K,V>
{
public static Dictionary<String, String> storeValues = new Dictionary<string, string>();
private static List<DatabankController<String, String>> singleton = null;
private static Microsoft.Office.Interop.Excel.Workbook myWorkBook;
private static Microsoft.Office.Interop.Excel.Sheets myWorkSheets;
private static Microsoft.Office.Interop.Excel.Application excel;
private DatabankController()
{
}
public static List<DatabankController<String, String>> getInstance(String fileName, String sheetName)
{
if (singleton == null)
{
singleton = data(fileName, sheetName);
}
return singleton;
}
private static List<DatabankController<String, String>> data(String filepath, String sheetName)
{
List<DatabankController<String, String>> mydata = new List<DatabankController<String,String>>();
excel = new Microsoft.Office.Interop.Excel.Application();
excel.Visible = true;
excel.DisplayAlerts = false;
string projectPath = Directory.GetParent(Environment.CurrentDirectory).FullName;
if (projectPath.Contains("bin"))
{
projectPath = Directory.GetParent(Environment.CurrentDirectory).Parent.Parent.FullName;
}
string xmlfilepath = projectPath + "\\BasicFramework\\"+filepath+".xlsx";
myWorkBook = excel.Workbooks.Open(xmlfilepath, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
myWorkSheets = myWorkBook.Worksheets;
Excel.Worksheet xlWorksheet = (Excel.Worksheet)myWorkSheets.get_Item(sheetName);
int columnCount = xlWorksheet.UsedRange.Columns.Count;
int rowCount = xlWorksheet.UsedRange.Rows.Count;
for (int i = 0; i < rowCount; i++)
{
DatabankController<String, String> currentHash = new DatabankController<string, string>();
for(int j = 0;j<= columnCount;j++)
{
if(i>0)
currentHash.Add((String)((Excel.Range)xlWorksheet.Cells[i, j]).ToString(), (String)((Excel.Range)xlWorksheet.Cells[i,j]).ToString());
}
mydata.Add(currentHash);
}
myWorkBook.Close();
myWorkBook = null;
excel.Quit();
excel = null;
return mydata;
}
public static DatabankController<String, String> getdataBankCounterRecord(String FileName,String SheetName,String rule)
{
List<DatabankController<String, String>> getValue = getInstance(FileName,SheetName);
DatabankController<String, String> dbcontroller = null;
bool flag = false;
int i = 0;
foreach(DatabankController<String, String> h in getValue)
{
foreach (String h1 in h.Keys.ToArray())
{
if (h[h1].Contains(rule))
{
flag = true;
break;
}
}
Console.WriteLine(i);
if (flag == true)
{
dbcontroller = getValue[i];
break;
}
i++;
}
return dbcontroller;
}
}
}
正好在以下行中抛出错误。我的Excel工作表正在使用open（）方法打开，但之后它将读取数据失败。任何人都可以帮我这个。
currentHash.Add((String)((Excel.Range)xlWorksheet.Cells[i, j]).ToString(), (String)((Excel.Range)xlWorksheet.Cells[i,j]).ToString());