c# - freeze top row and first two columns in datagridview

Question

I have a datagridview and am trying to achieve the following: 1. Top row should be frozen while scrolling vertically. 2. First two columns should be frozen wile scrolling horizontally.

I applied the column.Freeze = true and its working fine, but when applying row[0].freeze = true, it doesn't work for row freezing.

Answer 1

When I create the DataGridView, I associate it with a DataTable and then immediately set the first two rows to freeze. The rows don't freeze. However, if I handle a button click and set the rows to freeze in that button click, the rows successfully freeze. How, then, do I freeze the rows immediately upon associating the table?

Here's some code:

 DataTable dataTable = new DataTable();

    // Just add a bunch of columns
    for (int i = 0; i < 15; i++)
    {
    dataTable.Columns.Add("Col" + i.ToString(), typeof
    (string));
    }

    // Add a bunch of rows to the DataTable, with some dummy
    values
    for (int i = 0; i < 100; i++)
    {
    DataRow row = dataTable.NewRow();
    for (int j = 0; j < 15; j++)
    {
    row["Col" + j.ToString()] = "Val" + i.ToString() +
    "-" + j.ToString();
    }
    dataTable.Rows.Add(row);
    }

    gridView.DataSource = dataTable;

    gridView.Rows[1].Frozen = true;

This won't work. The rows are not frozen. However if I stick the gridView.Rows[1].Frozen = true; line in a button event handler, it works. How would I do this, then, without requiring an event trigger from the user? I see two solutions:

1. Bind the data this way:

   for (int i = 0; i < 15; i++)
   {
   DataGridViewTextBoxColumn c = new DataGridViewTextBoxColumn();
   c.Name = "Col" + i.ToString();
   gridView.Columns.Add(c);
   }
   gridView.Rows.Add(100);
   for (int i = 0; i < 100; i++)
   for (int j = 0; j < 15; j++)
   gridView.Rows[i].Cells[j].Value = "Val" + i.ToString() + "-" + j.ToString();
   gridView.Rows[0].Frozen = true;
   

2. Select frozen rows in this event:

   private void gridView_DataBindingComplete(object sender,
   DataGridViewBindingCompleteEventArgs e)
   {
   FrozeFirstRow();
   }