请教C# Navigator问题
private void bindingNavigatorMoveNextItem_Click(object sender, EventArgs e)
{
string ssql = "select * from Student";

SqlDataAdapter ad = new SqlDataAdapter(ssql, "Data Source=陆帆;Initial Catalog=Student;Integrated Security=True");

ds.Clear();
ad.Fill(ds, "Student");

bs.DataSource = ds;

bindingNavigator1.BindingSource = bs;
dataGridView1.DataSource = bs;

}
这段代码有什么问题么？为什么Navigator控件显示灰色呢？
[解决办法]
bs.DataSource = ds;

--bs没有看到申明出来？
bindingNavigator1.BindingSource = bs;
dataGridView1.DataSource = bs;
---dataGridView1.DataSource的datasource通常为数据集，bs不知道是什么？
以上属性都对了，再dataGridView1.databind()