Property Value
The parameters of a SQL statement or a stored procedure. The default value is an empty collection.
The following example creates a
UniConnection,
UniCommand, fills its parameters and displays them. An UPDATE statement with the parameters involved is executed then.
static void CreateCommand(UniConnection myConnection, string mySelectQuery, UniParameter[] myParamArray)
{
UniCommand myCommand = new UniCommand(mySelectQuery, myConnection);
string myMessage = "";
for (int i = 0; i < myParamArray.Length; i++)
{
myCommand.Parameters.Add(myParamArray[i]);
myMessage += myCommand.Parameters[i].ToString() + "\n";
}
Console.Write(myMessage);
try
{
myConnection.Open();
myCommand.ExecuteNonQuery();
}
finally
{
myConnection.Close();
}
}
static void Main(string[] args)
{
UniParameter[] myParams = new UniParameter[]
{
new UniParameter("DeptNo", 10),
new UniParameter("DName", "COUNTING")
};
UniConnection myConnection1 = new UniConnection("Provider=SQL Server;Data Source=SERVER;Initial Catalog=Northwind;User ID=sa");
CreateCommand(myConnection1,"UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo",myParams);
}
Public Sub CreateCommand(ByVal myConnection As Devart.Data.Universal.UniConnection, _
ByVal mySelectQuery As String, ByVal myParamArray() As Devart.Data.Universal.UniParameter)
Dim myCommand As New Devart.Data.Universal.UniCommand(mySelectQuery, myConnection)
Dim myMessage As String = ""
Dim i As Integer
For i = 0 To (myParamArray.Length - 1)
myCommand.Parameters.Add(myParamArray(i))
myMessage = String.Concat(myMessage, " ", myCommand.Parameters(i).ToString())
Next
Console.WriteLine(myMessage)
Try
myConnection.Open()
myCommand.ExecuteNonQuery()
Finally
myConnection.Close()
End Try
End Sub
Sub Main()
Dim myP1 As New Devart.Data.Universal.UniParameter
myP1.ParameterName = "DeptNo"
myP1.Value = 10
Dim myP2 As New Devart.Data.Universal.UniParameter
myP2.ParameterName = "DName"
myP2.Value = "ACCOUNTING"
Dim myParams(1) As Devart.Data.Universal.UniParameter
myParams(0) = myP1
myParams(1) = myP2
Dim myConnection1 As New Devart.Data.Universal.UniConnection("Provider=SQL Server;Data Source=SERVER;Initial Catalog=Northwind;User ID=sa")
CreateCommand(myConnection1, "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