Pulling a Business Object off a DataGridView in C#

Question

I have a List . Which I've converted to a BindingList and put into a BindingSource and bound to a DataGridView so that I can have the user select which JobItem they want to print. The DataGridView has a ButtonColumn, the user picks the JobItem, clicks the ButtonColumn the JobItem prints to a thermal printer.

My problem is I can’t get the syntax right to pull the selected Business Object off the DataGridView so I can send it to print function.

This is what I’m currently trying:

BusinessObjects.JobItem row = dgJobItems.SelectedRows[e.RowIndex].DataBoundItem;

This is the rest of my code:

DataGridViewButtonColumn btnPrint = new DataGridViewButtonColumn();
btnPrint.Text = "Print";
btnPrint.Name = "bPrint";
btnPrint.UseColumnTextForButtonValue = true;
dgJobItems.Columns.Add(btnPrint);

private void dgJobItems_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        if (dgJobItems.Columns[e.ColumnIndex].Name == "bPrint")
        {
            BusinessObjects.JobItem row = dgJobItems.SelectedRows[e.RowIndex].DataBoundItem;  
        }


    }

JobItem:

public class JobItem
{
    public int jobNumber { get; set; }
    public string serialNumber { get; set; }
    public string modelNumber { get; set; }
    public int quantity { get; set; }
    public string description { get; set; }

    public JobItem()
    {

    }
}

Sorry... I get the following error which I don't understand:

ArgumentOutOfRangeException was unhandled An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll

Additional information: Index was out of range. Must be non-negative and less than the size of the collection.

Answer 1

I am guessing it is the SelectedRows that is not returning what you are expecting. Since it is a single button in a row, use dgJobItems.Rows and the e.rowIndex like below. See if this helps.

if (dgJobItems.Columns[e.ColumnIndex].Name == "bPrint") {
  JobItem jobItem = (JobItem)dgJobItems.Rows[e.RowIndex].DataBoundItem;
  MessageBox.Show("Job Item" + jobItem.ToString());
}