SqlCeCommand.Parameters Property

Gets the SqlCeParameterCollection.

Namespace: System.Data.SqlServerCe
Assembly: System.Data.SqlServerCe (in system.data.sqlserverce.dll)

Syntax

'Declaration
Public ReadOnly Property Parameters As SqlCeParameterCollection

public SqlCeParameterCollection Parameters { get; }

public:
property SqlCeParameterCollection^ Parameters {
    SqlCeParameterCollection^ get ();
}

/** @property */
public SqlCeParameterCollection get_Parameters ()

public function get Parameters () : SqlCeParameterCollection

Property Value

The parameters of the SQL statement. The default is an empty collection.

Remarks

The .NET Compact Framework Data Provider for SQL Server Compact 3.5 SP1 supports named parameters for passing parameters to an SQL statement called by a SqlCeCommand when CommandType is set to Text. For example:

SELECT * FROM Customers WHERE CustomerID = @customerID 

Example

The following example creates a SqlCeCommand and sets an array of SqlCeParameter objects.

Dim conn As New SqlCeConnection("Data Source = MyDatabase.sdf;")
conn.Open()

Dim command As SqlCeCommand = conn.CreateCommand()

' Create and prepare a SQL statement
'
command.CommandText = "INSERT INTO Region (RegionID, RegionDescription) VALUES (@id, @desc)"

Dim param As SqlCeParameter = Nothing

' NOTE:
' For optimal performance, make sure you always set the parameter
' type and the maximum size - this is especially important for non-fixed
' types such as NVARCHAR or NTEXT; In case of named parameters, 
' SqlCeParameter instances do not need to be added to the collection
' in the order specified in the query; If however you use ? as parameter
' specifiers, then you do need to add the parameters in the correct order
'
param = New SqlCeParameter("@id", SqlDbType.Int)
command.Parameters.Add(param)

param = New SqlCeParameter("@desc", SqlDbType.NVarChar, 100)
command.Parameters.Add(param)

command.Parameters("@desc").Size = 100

' Calling Prepare after having set the CommandText and parameters
'
command.Prepare()

' Execute the SQL statement
'
command.ExecuteNonQuery()

' Change parameter values and call ExecuteNonQuery again
'
command.Parameters(0).Value = 21
command.Parameters(1).Value = "mySecondRegion"
command.ExecuteNonQuery()

SqlCeConnection conn = new SqlCeConnection("Data Source = MyDatabase.sdf;");
conn.Open();

SqlCeCommand command = conn.CreateCommand();

// Create and prepare a SQL statement
//
command.CommandText = "INSERT INTO Region (RegionID, RegionDescription) VALUES (@id, @desc)";

SqlCeParameter param = null;

// NOTE:
// For optimal performance, make sure you always set the parameter
// type and the maximum size - this is especially important for non-fixed
// types such as NVARCHAR or NTEXT; In case of named parameters, 
// SqlCeParameter instances do not need to be added to the collection
// in the order specified in the query; If however you use ? as parameter
// specifiers, then you do need to add the parameters in the correct order
//
param = new SqlCeParameter("@id", SqlDbType.Int);
command.Parameters.Add(param);

param = new SqlCeParameter("@desc", SqlDbType.NVarChar, 100);
command.Parameters.Add(param);

command.Parameters["@desc"].Size = 100;

// Calling Prepare after having set the CommandText and parameters
//
command.Prepare();

// Execute the SQL statement
//
command.ExecuteNonQuery();

// Change parameter values and call ExecuteNonQuery again
//
command.Parameters[0].Value = 21;
command.Parameters[1].Value = "mySecondRegion";
command.ExecuteNonQuery();

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Development Platforms

Windows Vista, Windows Mobile 5.0, Windows XP Professional with Service Pack 2 (SP2), Windows Server 2003, Windows Mobile 2003 for Pocket PC, Windows CE 5.0
Version Information
.NET Framework and NET Compact Framework
Supported in 3.5
.NET Framework
Supported in 3.0
.NET Compact Framework and .Net Framework
Supported in 2.0

See Also

Reference

SqlCeCommand Class
SqlCeCommand Members
System.Data.SqlServerCe Namespace
SqlCeParameter