DbCommand Object (ADO.NET)

DbCommand Object  (ADO.NET)

DbCommand object is used to send a SQL command to the data store. It can be a Data Manipulation Language (DML) command to retrieve, insert, update, or delete data. The DbCommand object can also be a Data Definition Language (DDL) command, which enables you to create tables and modify schema information at the database.

The following sample shows how to create and initialize a DbCommand object.


var ConnStr = ConfigurationManager.ConnectionStrings["myConnectionString"];

var myconnection = new SqlConnection(ConnStr.ConnectionString);

var myCommand = myconnection.CreateCommand();
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.CommandText = "EmpList";

Above code sample creates a DbConnection object that is an instance of SqlConnection. Then it creates a SqlCommand object named myCommand. When the CommandType property is set to StoredProcedure, the CommandText property should be set to the name of the stored procedure to be accessed.

CommandType Enumeration

  • Text : An SQL text command. (Default.)
  • StoredProcedure : The name of a stored procedure.
  • TableDirect  : The name of a table.

Connection String in Web.config file

<connectionStrings>

    <add name="myConnectionString" connectionString="Data Source=mySQLServer;Initial Catalog=myDatabase;User ID=myUserID;Password=myPassword" providerName="System.Data.SqlClient" />

  </connectionStrings>

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