ExecuteReader(CommandBehavior) Method

In This Topic

Sends the CommandText to the Connection, and builds a SqlDataReader using one of the System.Data.CommandBehavior values.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Shadows Function ExecuteReader( _
   ByVal behavior As CommandBehavior _
) As SqlDataReader

public new SqlDataReader ExecuteReader( 
   CommandBehavior behavior
)

Parameters

behavior: One of the System.Data.CommandBehavior values.

Return Value

A SqlDataReader object.

Remarks

When Devart.Data.SqlServer.SqlCommand.FetchAll property is false the following restriction takes place. While the SqlDataReader is in use, the associated SqlConnection is busy serving the SqlDataReader. While in this state, no operations can be performed on the SqlConnection except closing. This is the case until the SqlDataReader.Close method of the SqlDataReader is called.

Example

The following example creates a SqlCommand, then executes it by passing a string that is SQL SELECT statement, and a string to use to connect to the data source. The System.Data.CommandBehavior is then set to CloseConnection.

csharp

public void CreateSqlDataReader(string mySelectQuery,string myConnectionString)
{
  SqlConnection myConnection = new SqlConnection(myConnectionString);
  SqlCommand myCommand = new SqlCommand(mySelectQuery, myConnection);
  myCommand.Connection.Open();
  SqlDataReader myReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
  while(myReader.Read())
  {
    Console.WriteLine(myReader.GetString(0));
  }
  myReader.Close();
}

Visual Basic

Public Sub CreateSqlDataReader(mySelectQuery As String, _
myConnectionString As String)
  Dim myConnection As New SqlConnection(myConnectionString)
  Dim myCommand As New SqlCommand(mySelectQuery, myConnection)
  myCommand.Connection.Open()
  Dim myReader As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
  While myReader.Read()
    Console.WriteLine(myReader.GetString(0))
  End While
  myReader.Close()
End Sub

Reference

SqlCommand Class
SqlCommand Members
Overload List
SqlDataReader Class
SqlConnection Class

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