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