c#, Microsoft Interop Excel , change font style for s selected range

Question

I need to change the font style (font type ) of some cells in Excel sheet. Excel sheet is generated by Microsoft.Office.Interop.Excel

I want to change B3 to B100 range to be in Arial font type. here is my code

Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
Microsoft.Office.Interop.Excel._Worksheet worksheet = null;

app.Visible = true;
worksheet = workbook.Sheets["Sheet1"];
worksheet = workbook.ActiveSheet;
worksheet.Name = "Exported from gridview";
worksheet.get_Range("B3", "B100").Cells.Font.FontStyle = "Arial";

for (int i = 1; i < records_datagridview.Columns.Count + 1; i++)
{
   worksheet.Cells[1, i] = records_datagridview.Columns[i - 1].HeaderText;
}

for (int i = 0; i < records_datagridview.Rows.Count; i++)
{
   for (int j = 0; j < records_datagridview.Columns.Count; j++)
   {
      worksheet.Cells[i + 2, j + 1] = records_datagridview.Rows[i].Cells[j].Value.ToString();
   }
}

String file_path = fbd.SelectedPath + "/records_sheet_" + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + "_.xlsx";

workbook.SaveAs(file_path, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive,
                Type.Missing, Type.Missing, Type.Missing, Type.Missing);

app.Quit();

I used

worksheet.get_Range("B3", "B4").Cells.Font.FontStyle = "Arial";

But it's not working Can any one help me on this

Answer 1

hange your code to this:

worksheet.get_Range("B3", "B4").Cells.Font.Name = "Arial";

Tip: In many cases, you can answer questions like these yourself: simply record an Excel macro and look at the generated code. Even though it is VBA, not C#, you will often see what you need.