C#

// Calculate commissions based on sales person level

{                   <--- This shouldn't be here
string strSalesPersonLevel;
strSalesPersonLevel = txtSalesPersonLevel.Text;

...

case "4":
{
dblCalculateCommission = 1250 + (dblAmountSold * 0.05);
break;
}

}                   <--- This shouldn't be here
// Convert commission into a string and place into a label with currency
//formatting
lblCalculateCommission.Text = dblCalculateCommission.ToString("C2");

private void btnCalculateCommission_Click(object sender, EventArgs e)
{
    if (!int.TryParse(txtSalesPersonLevel.Text, out var salesPersonLevel) || salesPersonLevel < 1 || salesPersonLevel > 4)
    {
        MessageBox.Show("Invalid sales person level.", "Input Error");
        txtSalesPersonLevel.SelectAll();
        txtSalesPersonLevel.Select();
        return;
    }
    
    if (!double.TryParse(txtAmountSold.Text, out var amountSold))
    {
        MessageBox.Show("Invalid amount sold.", "Input Error");
        txtAmountSold.SelectAll();
        txtAmountSold.Select();
        return;
    }
    
    double calculatedCommission;
    switch (salesPersonLevel)
    {
        case 1:
        {
           calculatedCommission = 500 + (amountSold * 0.02);
           break;
        }
        case 2:
        {
           calculatedCommission = 750 + (amountSold * 0.03);
           break;
        }
        case 3:
        {
           calculatedCommission = 1000 + (amountSold * 0.04);
           break;
        }
        case 4:
        {
           calculatedCommission = 1250 + (amountSold * 0.05);
           break;
        }
        default:
        {
            // Can't be reached, but the compiler doesn't know that:
           calculatedCommission = 0;
           break;
        }
    }
    
    lblCalculateCommission.Text = calculatedCommission.ToString("C2");
}

double calculatedCommission = salesPersonLevel switch
{
    1 => 500 + (amountSold * 0.02),
    2 => 750 + (amountSold * 0.03),
    3 => 1000 + (amountSold * 0.04),
    4 => 1250 + (amountSold * 0.05),
    _ => 0 // Not reachable, but the compiler doesn't know that.
};

string query = "SELECT * FROM Win32_Printer";
ManagementObjectSearcher searcher = new ManagementObjectSearcher( query );
var services = searcher.Get();

foreach ( ManagementObject service in services ) {

   var properties = service.Properties;

   foreach ( PropertyData p in properties ) {

      if ( p.Value == null ) { continue; }

      Console.WriteLine( $"{p.Name}: [{p.Value}]" );

   }  // end for.

}  // end for.

SzakiII wrote:

I have a problem with identifying printers

Quote:

A hardware ID is a vendor-defined identification string that Windows uses to match a device to an INF file. In most cases, a device has more than one hardware ID associated with it. Typically, a list of hardware IDs is sorted from most to least suitable for a device.

Gerry Schmitz wrote:

A "Hardware Id" (or "instance" id) is not same as a Serial Number.

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Encoding iso = Encoding.GetEncoding("ISO-8859-1");

int rownum = 1;
            foreach (DataGridViewRow row in DGVName.Rows)
            {
                if (row.IsNewRow) continue;
                {
                    row.HeaderCell.Value = "Row " + rownum;
                    rownum = rownum + 1;
                }
            }

private void FrmMain_Shown(object sender, EventArgs epp)
    {
    string strConnect = SMDBSupport.SMInstanceStorage.GetInstanceConnectionString("Testing");
    using (SqlConnection con = new SqlConnection(strConnect))
        {
        try
            {
            con.Open();
            using (SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM myTable", con))
                {
                DataTable dt = new DataTable();
                da.Fill(dt);
                myDataGridView.DataSource = dt;
                }
            }
        catch (Exception ex)
            {
            Debug.WriteLine(ex.ToString());
            }
        }
    }

private void MyButton_Click(object sender, EventArgs e)
    {
    foreach (DataGridViewRow row in myDataGridView.Rows)
        {
        row.HeaderCell.Value = (row.Index + 1).ToString();
        }
    }

row.HeaderCell.Value = (row.Index + 1).ToString();

int i = row.Index;
i++;
string s = i.Tostring();   // Can't see this failing! :laugh:
var hc = row.HeaderCell;
hc.Value = s;