Display data to datagridview

Question

private void CmbCombo_SelectedValueChanged(object sender, EventArgs e)

{

try

{

if (CmbCombo.SelectedValue != null && CmbCombo.SelectedIndex != -1)

{

if (CmbCombo.SelectedValue.ToString() != string.Empty && CmbCombo.SelectedValue.ToString() != "System.Data.DataRowView")

{

ComboCreationSP creationSP = new ComboCreationSP();

ComboCreationInfo creationInfo = new ComboCreationInfo();

creationInfo = creationSP.ComboMasterViewAllForProduct(Convert.ToDecimal(CmbCombo.SelectedValue));

for (int a = 0; a < 2; a++)

{

dgvSalesInvoice.Rows.Add();

dgvSalesInvoice.Rows[a].Cells["dgvtxtSalesInvoiceProductName"].Value = creationInfo.ProductName;

dgvSalesInvoice.Rows[a].Cells["DcDescription"].Value = creationInfo.ProductName;

dgvSalesInvoice.Rows[a].Cells["dgvtxtSalesInvoiceBrand"].Value = creationInfo.PBrandId;

dgvSalesInvoice.Rows[a].Cells["dgvtxtSalesInvoiceQty"].Value = creationInfo.Qty;

dgvSalesInvoice.Rows[a].Cells["dgvtxtSalesInvoiceRate"].Value = creationInfo.Rate;

dgvSalesInvoice.Rows[a].Cells["dgvtxtSalesInvoiceProductCode"].Value = creationInfo.ProductCode;

dgvSalesInvoice.Rows[a].Cells["dgvtxtSalesInvoiceBarcode"].Value = creationInfo.Barcode;

}

txtTotalAmount.Text =Convert.ToString(creationInfo.Amount);

}

}

}

catch (Exception ex)

{

MessageBox.Show(ex.ToString());

}

}

 

Please help, I use this code to display the data from the database to the datagridview, the problem is that it only displays the last data.