What is GetOrdinal?
Mia Smith
Published Mar 14, 2026
What is GetOrdinal?
GetOrdinal is kana-width insensitive. Because ordinal-based lookups are more efficient than named lookups, it is inefficient to call GetOrdinal within a loop. Save time by calling GetOrdinal once and assigning the results to an integer variable for use within the loop.
When should I use DataReader?
The DataReader provides an unbuffered stream of data that allows procedural logic to efficiently process results from a data source sequentially. The DataReader is a good choice when you’re retrieving large amounts of data because the data is not cached in memory.
How do I check if a DataReader has a column?
string ColumnValue; if (dr[“ColumnName”] != null) ColumnValue = dr[“ColumnName”]. ToString(); if (dr.
What is column ordinal?
column ordinal, the ~ ‐ A number that represents the position of the column in a set of columns. So, if a table has 3 columns, named Name, Address, and Zip, in that order, their ordinals are 0, 1, and 2.
What’s better DataSet or DataReader?
DataReader provides faster performance, but has read-only and forward-only access. DataSet, on the other hand, is high resource-consuming, but offers more control and a disconnected nature. If you want random access and do not need to worry about having a constant connection with the database, go with DataSet.
Which is better DataReader or DataAdapter?
Using a DataReader produces faster results than using a DataAdapter to return the same data. Because the DataAdapter actually uses a DataReader to retrieve data, this should not surprise us. But there are many other reasons as well. DataReaders provide multiple asynchronous methods that can be employed.
Which of the following property of SqlDataReader class is used to check if SqlDataReader has rows?
HasRows
SqlDataReader Properties
| Property | Description |
|---|---|
| HasRows | It is used to get a value that indicates whether the SqlDataReader contains one or more rows. |
| IsClosed | It is used to retrieve a boolean value that indicates whether the specified SqlDataReader instance has been closed. |
What is the use of SqlDataReader in C#?
SqlDataReader : This is the class of connected architecture in . NET framework. The SqlDataReader is used to read a row of record at a time which is got using SqlCommand. It is read only, which means we can only read the record; it can not be edited.
What is SQL ordinal position?
In relational databases, including MySQL, SQL Server, Oracle, and others, the ORDINAL_POSITION refers to a column’s location in terms of ordering within a table or query output.
Are ordinal numbers?
We can use ordinal numbers to define their position. The numbers 1st(First), 2nd(Second), 3rd(Third), 4th(Fourth), 5th(Fifth), 6th(Sixth), 7th(Seventh), 8th(Eighth), 9th(Ninth) and 10th(Tenth) tell the position of different floors in the building. Hence, all of them are ordinal numbers.
Is DataReader faster than DataTable?
It was generally agreed that a DataReader is faster, but we wanted to see how much faster. The results surprised us. The DataTable was consistently faster than the DataReader. Approaching twice as fast sometimes.
