PgSqlRow Class

In This Topic

Represents PostgreSQL composite type data.

Syntax

Visual Basic
C#

'Declaration
 
Public Class PgSqlRow

public class PgSqlRow

Remarks

PgSqlRow class stores data of composite types. You can obtain it from server using one of PgSqlDataReader methods or create on client side and insert into table as PgSqlParameter value.

For detailed information on PostgreSQL composite types and how they are treated in dotConnect for PostgreSQL refer to article Working with Composite Types.

Example

This sample demonstrates usage of PgSqlRow, PgSqlRowType, PgSqlAttribute, and PgSqlAttributeCollection classes. It retrieves data from a column of composite type in a table and renders the data to console. To run the samples successfully you have to create server objects with the following script: CREATE TYPE tperson AS (name text, age integer); CREATE TABLE personnel (id integer, person tperson);

csharp

static void ReadData(PgSqlConnection conn)  
{ 
  string str = "SELECT person FROM personnel"; 
  PgSqlCommand pgCommand = new PgSqlCommand(str,conn); 
  PgSqlDataReader pgReader = pgCommand.ExecuteReader(); 
  while (pgReader.Read())  
  { 
    //obtain data
    PgSqlRow pgRow = pgReader.GetPgSqlRow(0);
    if (pgRow == null) 
    {
      Console.WriteLine();
      continue;
    }
    //obtain data description
    PgSqlRowType pgRowType = pgRow.RowType;
    //iterate through all columns
    foreach(PgSqlAttribute pgAttr in pgRowType.Attributes)
    {
      Console.Write(pgRow[pgAttr] + "\t"); 
    }
    Console.WriteLine();
  } 
  pgReader.Close(); 
}

Visual Basic

Sub ReadData(ByVal conn As PgSqlConnection)
  Dim str As String = "SELECT person FROM personnel"
  Dim pgCommand As PgSqlCommand = New PgSqlCommand(str, conn)
  Dim pgReader As PgSqlDataReader = pgCommand.ExecuteReader()
  While pgReader.Read()
    'obtain data
    Dim pgRow As PgSqlRow = pgReader.GetPgSqlRow(0)
    If pgRow Is Nothing Then
      Console.WriteLine()
    Else
      'obtain data description
      Dim pgRowType As PgSqlRowType = pgRow.RowType
      'iterate through all columns
      For Each pgAttr As PgSqlAttribute In pgRowType.Attributes
        Console.Write(pgRow(pgAttr) & Chr(9))
      Next pgAttr
      Console.WriteLine()
    End If
  End While
  pgReader.Close()
End Sub

Inheritance Hierarchy

System.Object
Devart.Data.PostgreSql.PgSqlRow

Reference

PgSqlRow Members
Devart.Data.PostgreSql Namespace
PgSqlRowType Class

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