Calling Stored Procedures

You can invoke a stored procedure using CompositeCommand in the same way as any other SQL stored procedure. To instantiate a CompositeCommand object, provide the name of the stored procedure and a CompositeConnection instance as arguments to the constructor. Set the value of the CommandType property to "StoredProcedure" and add the parameters as key-value pairs to the Parameters collection of the CompositeCommand instance.

C#

string connectionString = "Host=myHost;Domain=myDomain;DataSource=myDataSource;User=myUser;Password=myPassword";

using (CompositeConnection connection = new CompositeConnection(connectionString)) {

  CompositeCommand cmd = new CompositeCommand("SearchSuppliers", connection);

  cmd.CommandType = CommandType.StoredProcedure;

  cmd.Parameters.Add(new CompositeParameter("@Country", "US"));

  // Add other parameters as needed ...

  CompositeDataReader rdr = cmd.ExecuteReader();

  while (rdr.Read()) {

    for (int i = 0; i < rdr.FieldCount; i++) {

      Console.WriteLine(rdr.GetName(i) + " --> " + rdr[i]);

    }

    Console.WriteLine();

  }

}

VB.NET

Dim connectionString As String = "Host=myHost;Domain=myDomain;DataSource=myDataSource;User=myUser;Password=myPassword"

Using connection As New CompositeConnection(connectionString)

  Dim cmd As New CompositeCommand("SearchSuppliers", connection)

  cmd.CommandType = CommandType.StoredProcedure

  cmd.Parameters.Add(New CompositeParameter("@Country", "US"))

  ' Add other parameters as needed ...

  Dim rdr As CompositeDataReader = cmd.ExecuteReader()

  While rdr.Read()

      For i As Integer = 0 To rdr.FieldCount - 1

          Console.WriteLine(rdr.GetName(i) + " --> " + rdr(i))

      Next

      Console.WriteLine()

  End While

End Using

Alternatively, you can set the parameters of a stored procedure in the text of the command. The support for stored procedure statements follows the standard form shown below:

"EXECUTE my_proc @first = 1, @second = 2, @third = 3;"

"EXEC my_proc @first = 1, @second = 2, @third = 3;"

To execute a parameterized query, add parameters as key-value pairs to the Parameters collection of the CompositeCommand instance.

C#

string connectionString = "Host=myHost;Domain=myDomain;DataSource=myDataSource;User=myUser;Password=myPassword";

using (CompositeConnection connection = new CompositeConnection(connectionString)) {

  CompositeCommand cmd = new CompositeCommand("EXECUTE SearchSuppliers Country = @Country;", connection);

  cmd.Parameters.Add(new CompositeParameter("@Country", "US"));

  // Add other parameters as needed ...

  CompositeDataReader rdr = cmd.ExecuteReader();

  while (rdr.Read()) {

    for (int i = 0; i < rdr.FieldCount; i++) {

      Console.WriteLine(rdr.GetName(i) + " --> " + rdr[i]);

    }

    Console.WriteLine();

  }

}

 

VB.NET

 

Dim connectionString As String = "Host=myHost;Domain=myDomain;DataSource=myDataSource;User=myUser;Password=myPassword"

Using connection As New CompositeConnection(connectionString)

  Dim cmd As New CompositeCommand("EXECUTE SearchSuppliers Country = @Country;", connection)

  cmd.Parameters.Add(New CompositeParameter("@Country", "US"))

  ' Add other parameters as needed ...

  Dim rdr As CompositeDataReader = cmd.ExecuteReader()

  While rdr.Read()

      For i As Integer = 0 To rdr.FieldCount - 1

          Console.WriteLine(rdr.GetName(i) + " --> " + rdr(i))

      Next

      Console.WriteLine()

  End While

End Using