This code opens an Excel file, reads the value of cell A1, and defines an Excel class to open workbooks and worksheets. The Excel class constructor takes a file path and sheet number. The ReadCell method returns the value of the cell at row i and column j, incrementing the indexes by 1, or an empty string if the cell is null.

1. main()
Openfile();
publicvoidOpenFile()
{
Excel exceel =newExcel(@"Test.xlsx",1)
console.log(excel.ReadCell(0,0);
}
Excel.cs
stringpath = "";
_Applicationexcel =new_Excel.Application();
workbookwb;
worksheetws;
publicExcel(stringpath, intSheet)
{
this.path= path;
wb = excel.Workbooks.Open(path)
ws = wb.WorkSheets[sheet];
}
publicstringReadCell(inti,intj)
{
i++;
j++;

2. if(ws.Cells[i,j].Value2!=null)
returnws.cells[i,j].Value2;
else
return""
}