PosGroup.Lane.Row[m].Col[n].Layer[h].Pos.PosState = Convert.ToInt32(ds1.Tables[0].Rows[i]["Pos_State"]);

var lane = PosGroup.Lane;
var row = lane.Row;

for (int m = 0; m <= IRow; m++)
{
    PosGroup.Lane.Row[m] = new TRow();
    for (int n = 0; n <= ICol; ICol++)
    {
        PosGroup.Lane.Row[m].Col[n] = new TCol();
        for (int h = 0; h <= ILayer; h++)
        {
            PosGroup.Lane.Row[m].Col[n].Layer[h] = new TLayer();
            PosGroup.Lane.Row[m].Col[n].Layer[h].Pos.PosState = Convert.ToInt32(ds1.Tables[0].Rows[i]["Pos_State"]);
            PosGroup.Lane.Row[m].Col[n].Layer[h].Pos.Zone_ID = Convert.ToInt32(ds1.Tables[0].Rows[i]["Zone_ID"]);
            PosGroup.Lane.Row[m].Col[n].Layer[h].Pos.PID = Convert.ToInt32(ds1.Tables[0].Rows[i]["PID"]);
            PosGroup.Lane.Row[m].Col[n].Layer[h].Pos.HasSetValue = true;
        }
    }
}