If you have text data in a file and want to show it in datagrid view using C#, here is the code.
dataGridView1.Rows.Clear( );
int number_of_columns = dataGridView1.Columns.Count;
int i = 0;
foreach( var line in File.ReadLines( @"D:\googlemap.txt" ) )
{
if( i % number_of_columns == 0 ) dataGridView1.Rows.Add( );
dataGridView1[i % number_of_columns, i / number_of_columns].Value = line;
++i;
}