How To Get DataGrid Cell Values And Insert Into Label

Using VB.Net. I want to get a all datagrid cell values, then insert into table1.

Code
cmd = New SqlCommand("insert into table1 values('" & DataGrid.Rows(0).Cells(0).Value & "', '" & DataGrid.Rows(0).Cells(1).Value & "', '" & DataGrid.Rows(0).Cells(2).Value & "', '" & DataGrid.Rows(0).Cells(3).Value & "')", con)
cmd.ExecuteNonQuery()

The above code is inserting first row of datagrid cell value, but I want to insert all the datagrid cell values. How to modify my code for getting all the datagrid cell value.