How to convert reader to DataTable in c#?
How to convert reader to DataTable in c#?
Load() and the second one, by manually converting a DataReader to a DataTable.
- Step 1: Create a new ASP.NET application.
- Step 2: Let us first see how to convert a DataReader to a DataTable using the easy way out.
- Step 3: The method shown in the Step 2 was the easy way out.
- Step 4: Call the two methods on the PageLoad()
How does DataReader work in C#?
ExecuteReader to retrieve rows from a data source. 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.
What is ExecuteReader in C#?
The ExecuteReader() in C# SqlCommand Object sends the SQL statements to the Connection Object and populate a SqlDataReader Object based on the SQL statement. When the ExecuteReader method in SqlCommand Object execute , it will instantiate a SqlClient. SqlDataReader Object.
What is SQL Data Adapter?
SqlDataAdapter is used in conjunction with SqlConnection and SqlCommand to increase performance when connecting to a SQL Server database. If you are using SQL Server stored procedures to edit or delete data using a DataAdapter , make sure that you do not use SET NOCOUNT ON in the stored procedure definition.
How do I fix the Executereader Connection property has not been initialized?
That said, there are a few things you should correct in your code.
- Use using statements for connections. It will automatically close your connection. C# Copy Code.
- Also use using for readers for the same reason. C# Copy Code.
- Use paramterized SQL commands.
Which is faster DataReader or DataAdapter?
SqlDataReader has historically been significantly faster than SqlDataAdapter .
When should I use ExecuteReader?
ExecuteReader method is used to execute SQL queries or stored procedures that return a set of rows from the database.
- It is generally used with SELECT command where the query is required to fetch a set of data from the database.
- This method allows a way of reading a forward-only set of rows from the database.
What is the difference between SqlDataReader and SqlDataAdapter?
A SqlDataAdapter is typically used to fill a DataSet or DataTable and so you will have access to the data after your connection has been closed (disconnected access). The SqlDataReader is a fast forward-only and connected cursor which tends to be generally quicker than filling a DataSet/DataTable.
What is the difference between SqlCommand and SqlDataAdapter?
SqlAdapter is used to fill a dataset. SqlCommand can be used for any purpose you have in mind related to Create/Read/Update/Delete operations, stored procedure execution and much more.