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What is SqlCommand C#?

November 24, 2020 by Rhyley Bryan

What is SqlCommand C#?

A SqlCommand object allows you to query and send commands to a database. It has methods that are specialized for different commands. The ExecuteReader method returns a SqlDataReader object for viewing the results of a select query. For insert, update, and delete SQL commands, you use the ExecuteNonQuery method.

What is SqlConnection and SqlCommand?

SqlConnection and SqlCommand are classes of a connected architecture and found in the System. Data. SqlClient namespace. The SqlConnection class makes a connection with the database. The SqlCommand class is used to execute the SQL statements.

What are all the different methods under SqlCommand?

What is ado net example?

We can create a web form that has ADO.NET connectivity. A simple web form that has form controls can be submitted to the server. ADO.NET allows us to store the submitted values to store into SQL Server database.

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.

How do I get SqlConnection in C#?

The following code creates a SqlConnection object by passing a SQL Server connection string.

using(SqlConnection conn = new SqlConnection()) {
conn. ConnectionString = “Server=[server_name];Database=[database_name];Trusted_Connection=true”;
// using the code here…
}

What is using () in C#?

The “using” statement allows you to specify multiple resources in a single statement. The object could also be created outside the “using” statement. The objects specified within the using block must implement the IDisposable interface.

What is ExecuteScalar in C#?

ExecuteScalar method is used to execute SQL Commands or storeprocedure, after executing return a single value from the database. It also returns the first column of the first row in the result set from a database.

Is ADO.NET still used?

So yes: there’s definitely still room for “classic” ADO.NET to “fill the gaps” where EF/L2S or other technologies don’t really offer anything useful.

What is ADO.NET and its advantages?

ADO.NET addresses the common data-exchange limitation by using XML as its payload data format. Since XML is text-based and simple to parse, it’s a good choice for a common, platform-independent, and transportable data format.

What is ExecuteReader in C #?

ExecuteReader method is used to execute a SQL Command or storedprocedure returns a set of rows from the database.

What is difference between ExecuteNonQuery and ExecuteQuery?

Moreover the executeQuery() is not used in . net but it is used in JAVA. ExecuteNonQuery: Executes Insert, Update, and Delete statements (DML statements) and returns the number of rows affected.

What does a SqlCommand do in C #?

SqlCommand.` This type deals with databases. It executes SQL commands on a database. It sends an SQL command to a database that is specified by an SqlConnection object.`We then call` instance methods to physically apply the command to the database.

Which is an example of a common SqlCommand?

Common. DbCommand, ICloneable, IDisposable The following example creates a SqlConnection, a SqlCommand, and a SqlDataReader. The example reads through the data, writing it to the console. Finally, the example closes the SqlDataReader and then the SqlConnection as it exits the Using code blocks.

What are the parameters of the SqlCommand type?

Info: The SqlCommand type has a public parameterized constructor and it can be used with one or more arguments. And: The first parameter specifies the SQL statement. The second parameter is the SqlConnection. The third parameter is the SqlTransaction. Important: This program interfaces with the SQL Server engine.

What are the names of the commands in SQL?

Sql Command. Command Text Property System. Data. Sql Client Gets or sets the Transact-SQL statement, table name or stored procedure to execute at the data source. The Transact-SQL statement or stored procedure to execute. The default is an empty string. The following example creates a SqlCommand and sets some of its properties.