To load special records from worksheet in main memory: C#

Question

Hello
I used this code. I do not have any error. My program is run after 55 seconds. My data is large.
Now all recirds load in RAM. How can I load special records in RAM. For example I want to load record 2 from Book1.xlsx in RAM.
Microsoft.Office.Interop.Excel.Application app_main = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbooks workbooks_main = app_main.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook_main = workbooks_main.Open(Application.StartupPath + @"\Book1.xlsx");
Microsoft.Office.Interop.Excel.Worksheet worksheet_main = workbook_main.Worksheets[1];
var cellValue_main = (worksheet_main.Cells[2, 1] as Excel.Range).Value;
workbook_main.Close();
workbooks_main.Close();
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook_main);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks_main);
app_main.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(app_main);

Answer 1

Hi ARZARE,
I have made a test with your code and the value of “cellValue_main”, and I modified your code as below:
Microsoft.Office.Interop.Excel.Application app_main = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbooks workbooks_main = app_main.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook_main = workbooks_main.Open(@"D:\Backup\Desktop\Test.xlsx");
Microsoft.Office.Interop.Excel.Worksheet worksheet_main = workbook_main.Worksheets[1];
var cellValue_main = (worksheet_main.Cells[2, 1] as Microsoft.Office.Interop.Excel.Range).Value;
var rowValue_main = (worksheet_main.Rows[1] as Microsoft.Office.Interop.Excel.Range).Value2; //row value
workbook_main.Close();
workbooks_main.Close();
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook_main);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks_main);
app_main.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(app_main);
If you want to get the value of row 2, you could store the “rowValue_main” and query from it. Also, you could loop the cell value of the row to get all the data of the row.
In addition, if you want to query data from the sheet, I think you could do as the reply from Joel. You could store the data to a dataset or datatable, and query from it.
If you have any further questions, please feel free to post in this forum.
Best Regards,
Edward
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