Import excel sheet data to datagrid without using oledb

Question

In my Windows based application(C#) i want to import excel sheet to show its data in DatatGridView i dont want to use oledb

any Help

Answer 1

Those codes above does not work. That code works for me (.NET Framework 4.7.1)

private void processExcel(string filename)
{
    Excel.Application xlApp;
    Excel.Workbook xlWorkBook;
    Excel.Worksheet xlWorkSheet;

    var missing = System.Reflection.Missing.Value;

    xlApp = new Excel.Application();
    xlWorkBook = xlApp.Workbooks.Open(filename, false, true, missing, missing, missing, true, Excel.XlPlatform.xlWindows, '\t', false, false, 0, false, true, 0);
    xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

    Excel.Range xlRange = xlWorkSheet.UsedRange;
    Array myValues = (Array)xlRange.Cells.Value2;

    int vertical = myValues.GetLength(0);
    int horizontal = myValues.GetLength(1);

    DataTable dt = new DataTable();

    // must start with index = 1
    // get header information
    try
    {
        for (int i = 1; i <= horizontal; i++)
        {
            dt.Columns.Add(new DataColumn(Convert.ToString(myValues.GetValue(1, i))));
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }


    // Get the row information
    for (int a = 2; a <= vertical; a++)
    {
        object[] rows = new object[horizontal];
        for (int b = 1; b <= horizontal; b++)
        {
            rows[b - 1] = myValues.GetValue(a, b);
        }
        DataRow row = dt.NewRow();
        row.ItemArray = rows;
        dt.Rows.Add(row);
    }

    // assign table to default data grid view
    dataGridView1.DataSource = dt;

    xlWorkBook.Close(true, missing, missing);
    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();
    }
}