private void reset_btn_Click(object sender, EventArgs e)
{
partnumber_cbo.SelectedIndexChanged -= partnumber_cbo_SelectedIndexChanged;
gaugeRefTableAdapter.Fill(eNGDataDataSet.GaugeRef);
partnumber_cbo.DataSource = sheetCoil_UsageTableAdapter.GetPartNumber();
partnumber_cbo.DisplayMember = "partnumber";
material_cbo.DataSource = sheetCoil_UsageTableAdapter.GetMaterial("%", "%", "%", "%", "%", "%");
material_cbo.DisplayMember = "material";
type_cbo.DataSource = sheetCoil_UsageTableAdapter.GetType("%", "%", "%", "%", "%", "%");
type_cbo.DisplayMember = "type";
density_cbo.DataSource = sheetCoil_UsageTableAdapter.GetDensity("%", "%", "%", "%", "%");
density_cbo.DisplayMember = "density";
length_cbo.DataSource = sheetCoil_UsageTableAdapter.GetLength("%", "%", "%", "%", "%", "%");
length_cbo.DisplayMember = "length";
width_cbo.DataSource = sheetCoil_UsageTableAdapter.GetWidth("%", "%", "%", "%", "%", "%");
width_cbo.DisplayMember = "width";
partnumber_cbo.SelectedIndexChanged += partnumber_cbo_SelectedIndexChanged;
}