DataGridView for data query method

1.DataGridView转DataTable

2.DataTable转DataView

3.DataView转DataTable

private System.Data.DataTable Get_lcg(DataGridView myDataGridView)
{
System.Data.DataTable mydataTable = new System.Data.DataTable();

System.Data.DataTable dt = ((System.Data.DataTable)myDataGridView.DataSource).Copy();

DV = dt.DefaultView the DataView;
dv.RowFilter string.Format = ( "field name =" {0} ') "," query field ");
mydataTable = dv.ToTable (to true," a field "," fields two "" field three ");

return mydataTable;
}