Question

返回System.Data.SqlClient.SqlDataReader

库类文件
public SqlDataReader selectread(string sql)
{
string connectionString = GetConnectionString();
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(sql, connection);
if(connection.State==ConnectionState.Closed)
{
connection.Open();
}
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return reader;
}

page_load文件

Class1 sqlq = new Class1();
SqlDataReader reader = sqlq.selectread("select * from user");
while(reader.Read())
{
Response.Write (reader.ToString());
}
哪里错拉呢
标题就是他返回的string

Answer 1

reader.ToString()返回这个string是正确的。
如果你是想取值的话，应该是reader[0].toString()或者是reader["字段名"].toString()