Property Value
The parameters of a SQL statement or a stored procedure. The default value is an empty collection.
The following example creates a
PgSqlConnection,
PgSqlCommand, fills its parameters and displays them. An UPDATE statement with the parameters involved is executed then.
static void CreateCommand(PgSqlConnection pgConnection, string mySelectQuery, PgSqlParameter[] myParamArray)
{
PgSqlCommand pgCommand = new PgSqlCommand(mySelectQuery, pgConnection);
string myMessage = "";
for (int i = 0; i < myParamArray.Length; i++)
{
pgCommand.Parameters.Add(myParamArray[i]);
myMessage += pgCommand.Parameters[i].ToString() + "\n";
}
Console.Write(myMessage);
try
{
pgConnection.Open();
pgCommand.ExecuteNonQuery();
}
finally
{
pgConnection.Close();
}
}
static void Main(string[] args)
{
PgSqlParameter[] myParams = new PgSqlParameter[]
{
new PgSqlParameter("DeptNo", 10),
new PgSqlParameter("DName", "COUNTING")
};
PgSqlConnection pgConnection1 = new PgSqlConnection(
"host=server;database=test;user id=postgres;");
CreateCommand(pgConnection1,"UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo",myParams);
}
Public Sub CreateCommand(ByVal pgConnection As Devart.Data.PostgreSql.PgSqlConnection, _
ByVal mySelectQuery As String, ByVal myParamArray() As Devart.Data.PostgreSql.PgSqlParameter)
Dim pgCommand As New Devart.Data.PostgreSql.PgSqlCommand(mySelectQuery, pgConnection)
Dim myMessage As String = ""
Dim i As Integer
For i = 0 To (myParamArray.Length - 1)
pgCommand.Parameters.Add(myParamArray(i))
myMessage = String.Concat(myMessage, " ", pgCommand.Parameters(i).ToString())
Next
Console.WriteLine(myMessage)
Try
pgConnection.Open()
pgCommand.ExecuteNonQuery()
Finally
pgConnection.Close()
End Try
End Sub
Sub Main()
Dim myP1 As New Devart.Data.PostgreSql.PgSqlParameter
myP1.ParameterName = "DeptNo"
myP1.Value = 10
Dim myP2 As New Devart.Data.PostgreSql.PgSqlParameter
myP2.ParameterName = "DName"
myP2.Value = "ACCOUNTING"
Dim myParams(1) As Devart.Data.PostgreSql.PgSqlParameter
myParams(0) = myP1
myParams(1) = myP2
Dim pgConnection1 As New Devart.Data.PostgreSql.PgSqlConnection( _
"host=server;database=test;user id=postgres;")
CreateCommand(pgConnection1, "UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo", myParams)
End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2