以编程方式为DataGridRow设置选定的行（不使用索引！）

Question

I have a form with a DataGridView on it, that gets populated in the form's Constructor from a DataSource using a data adapter ( AdsDataAdapter ). It shows people's first name , surname and reference number (which is the primary key of the underlying table in the database). The rows in the DataGridView however are ordered by the surname field (by using the ORDER BY clause in the SELECT statement that gets passed to the data adapter).

After the DataGridView is populated, I want to be able to type a surname in a TextBox , and have the DataGridView navigate to the first row where the first letters of the surname matches what the user types.

How do I go about doing this navigation?

Answer 1

The "navigate" solution

private void textBox1_TextChanged(object sender, EventArgs e)
{
  for (int i=0;i<theDataGridView.RowCount;i++)
  {
    if (theDataGridView.Rows[i].Cells["surname"].Value.ToString().StartsWith(textBox1.Text))
    {
      theDataGridView.CurrentCell = theDataGridView.Rows[i].Cells["surname"];
      // optionally
      theDataGridView.FirstDisplayedScrollingRowIndex = theDataGridView.CurrentCell.RowIndex;
      break ;
    }
  }
}

The "Filter" solution

First, bind your DataTable to the DataGridView via a BindingSource.

BindingSource theBindingSource = new BindingSource() ;
theBindingSource.DataSource    = theDataTable ;
theDataGridView.DataSource     = theBindingSource ;

Then set the Filter property of the BindingSource in the TextChanged event:

private void textBox1_TextChanged(object sender, EventArgs e)
{
  theBindingSource.Filter = "surname LIKE '"+textBox1.Text+"%'";
  // if no match : Cancel filter
  if (theDataGridView.RowCount==0) theBindingSource.Filter = "" ; 
}