SqlCeCommand Class

Represents an SQL statement to execute against a data source.

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

'Declaration
Public NotInheritable Class SqlCeCommand
    Inherits DbCommand
    Implements ICloneable
'Usage
Dim instance As SqlCeCommand

public sealed class SqlCeCommand : DbCommand, ICloneable

public ref class SqlCeCommand sealed : public DbCommand, ICloneable

public final class SqlCeCommand extends DbCommand implements ICloneable

public final class SqlCeCommand extends DbCommand implements ICloneable

When an instance of SqlCeCommand is created, the read/write properties are set to their initial values. For a list of these values, see the SqlCeCommand constructor.

SqlCeCommand features the following methods that execute commands at a data source:

The Data Provider for SQL Server Mobile does not support batched queries. Commands must be in the following form:

Select * from Customers and not Select * from Customers; Select * from Orders;

If you are using code generated for System.Data.SqlClient, you may have to alter your queries to conform to this restriction.

SQL Server Mobile supports multiple simultaneous connections as well as multiple commands sharing the same connection. This means that it is possible to have multiple instances of SqlCeDataReader on the same connection. This behavior differs from that of System.Data.SqlClient.

If a fatal SqlCeException is generated by the method executing a SqlCeCommand, the SqlCeConnection may be closed. You can reopen the connection and continue.

The following example uses SqlCeCommand, along with SqlCeConnection, to select rows from a database.

Dim query As String = "SELECT [Order ID], [Customer] FROM Orders"
Dim conn As New SqlCeConnection(connString)
Dim cmd As New SqlCeCommand(query, conn)

conn.Open()
Dim rdr As SqlCeDataReader = cmd.ExecuteReader()

Try
    ' Iterate through the results
    '
    While rdr.Read()
        Dim val1 As Integer = rdr.GetInt32(0)
        Dim val2 As String = rdr.GetString(1)
    End While
Finally
    ' Always call Close when done reading
    '
    rdr.Close()

    ' Always call Close when done reading
    '
    conn.Close()
End Try

string query = "SELECT [Order ID], [Customer] FROM Orders";
SqlCeConnection conn = new SqlCeConnection(connString);
SqlCeCommand cmd = new SqlCeCommand(query, conn);

conn.Open();
SqlCeDataReader rdr = cmd.ExecuteReader();

try
{
    // Iterate through the results
    //
    while (rdr.Read())
    {
        int val1 = rdr.GetInt32(0);
        string val2 = rdr.GetString(1);
    

finally
{
    // Always call Close when done reading
    //
    rdr.Close();

    // Always call Close when done reading
    //
    conn.Close();

System.Object
   System.MarshalByRefObject
     System.ComponentModel.Component
       System.Data.Common.DbCommand
        System.Data.SqlServerCe.SqlCeCommand

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

Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows XP Professional x64 Edition, Windows XP SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

Supported in: 2.0, 1.0

SqlCeCommand Members
System.Data.SqlServerCe Namespace
SqlCeDataAdapter
SqlCeConnection