C#在后台从数据库查询用户列表,返回前台显示怎么实现

userList.aspx
中放个盛放你数据的控件，如：repeater，gridview等，再绑定一下就好了

OleDbDataAdapter oldAdapter = null;

string sql = "select * from student";

oldAdapter = new OleDbDataAdapter(sql, conn);

// MessageBox.Show(oldAdapter.ToString());

DataSet ds = new DataSet();
oldAdapter.Fill(ds, "dat");
DataTable dt = new DataTable();
try
{
dt = ds.Tables[0];
//string a=dt.Rows[0][0].ToString();
}
catch (Exception)
{
}
this.dataGridView1.DataSource = dt;
this.dgvBook.DataSource=dt;

你看看那块是你需要的