SQLDataReader行数

SQLDataReaders是仅转发的。您实际上是在这样做：

count++;  // initially 1.DataBind(); //consuming all the records//next iteration on.Read()//we've now come to end of resultset, thanks to the DataBind()//count is still 1

您可以改为：

if (reader.HasRows){    rep.DataSource = reader;    rep.DataBind();}int count = rep.Items.Count; //somehow count the num rows/items `rep` has.