Property Value
The parameters of a SQL statement or a stored procedure. The default value is an empty collection.
The following example creates a
MySqlConnection,
MySqlCommand, fills its parameters and displays them. An UPDATE statement with the parameters involved is executed then.
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static void CreateCommand(MySqlConnection myConnection, string mySelectQuery, MySqlParameter[] myParamArray)
{
MySqlCommand myCommand = new MySqlCommand(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)
{
MySqlParameter[] myParams = new MySqlParameter[]
{
new MySqlParameter("DeptNo", 10),
new MySqlParameter("DName", "COUNTING")
};
MySqlConnection myConnection1 = new MySqlConnection(
"User Id=root;Host=localhost;Database=Test;");
CreateCommand(myConnection1,"UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo",myParams);
} |
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Public Sub CreateCommand(ByVal myConnection As Devart.Data.MySql.MySqlConnection, _
ByVal mySelectQuery As String, ByVal myParamArray() As Devart.Data.MySql.MySqlParameter)
Dim myCommand As New Devart.Data.MySql.MySqlCommand(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.MySql.MySqlParameter
myP1.ParameterName = "DeptNo"
myP1.Value = 10
Dim myP2 As New Devart.Data.MySql.MySqlParameter
myP2.ParameterName = "DName"
myP2.Value = "ACCOUNTING"
Dim myParams(1) As Devart.Data.MySql.MySqlParameter
myParams(0) = myP1
myParams(1) = myP2
Dim myConnection1 As New Devart.Data.MySql.MySqlConnection( _
"User Id=root;Host=localhost;Database=Test;")
CreateCommand(myConnection1, "UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo", myParams)
End Sub |
