怎样在datagrid里设置列宽

string MySelectStr = "";
MySelectStr = "select * from SUBJECT";
OleDbConnection myConnection = DataConnection.Instance.GetConnection();
DataSet dataView = new DataSet();
OleDbDataAdapter myAdapter = new OleDbDataAdapter(MySelectStr,myConnection);
myAdapter.Fill(dataView);
myConnection.Close();

DataTable myDataTable = dataView.Tables[0];
this.SUBJECT.DataSource = myDataTable;

DataGridTableStyle ds = new DataGridTableStyle(true);
ds.DataGrid = this.SUBJECT;
ds.MappingName = myDataTable.TableName;

this.SUBJECT.TableStyles.Clear();
this.SUBJECT.TableStyles.Add(ds);

ds.GridColumnStyles[0].HeaderText = "编号";
ds.GridColumnStyles[0].Width = 100; '第一列，列宽100
ds.GridColumnStyles[0].MappingName = "SUBJECTID";
ds.GridColumnStyles[1].HeaderText = "科目名称";
ds.GridColumnStyles[1].Width = 0; ‘第二列，宽度为0 则隐藏
ds.GridColumnStyles[1].MappingName = "SUBJECTNAME";