Need help on exporting only visible DataGridView columns to excel, I have this code for hiding columns in DataGridView. this.dg1.Columns[0].Visible = false; And then I have button click event for exporting to excel.

// creating Excel Application
Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel._Application();

// creating new WorkBook within Excel application
Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);

// creating new Excelsheet in workbook
Microsoft.Office.Interop.Excel._Worksheet worksheet = null;

// see the excel sheet behind the program
app.Visible = true;

// get the reference of first sheet. By default its name is Sheet1.
// store its reference to worksheet
worksheet = workbook.Sheets["Sheet1"];
worksheet = workbook.ActiveSheet;


// changing the name of active sheet
worksheet.Name = "PIN korisnici";

// storing header part in Excel
for (int i = 1; i < dg1.Columns.Count + 1; i++)
{
worksheet.Cells[1, i] = dg1.Columns[i - 1].HeaderText;
}
// storing Each row and column value to excel sheet
for (int i = 0; i < dg1.Rows.Count - 1; i++)
{
for (int j = 0; j < dg1.Columns.Count; j++)
{
worksheet.Cells[i + 2, j + 1] = dg1.Rows[i].Cells[j].Value.ToString();
}
}

but I want to export only visible columns, while I get all of them, anyone, help on this.