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SqlCeConnection.ChangeDatabase Method

  • Artigo

Changes the current database for an open SqlCeConnection.

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

Syntax

'Declaration
Public Overrides Sub ChangeDatabase ( _
    value As String _
)
'Usage
Dim instance As SqlCeConnection
Dim value As String

instance.ChangeDatabase(value)

public override void ChangeDatabase (
    string value
)

public:
virtual void ChangeDatabase (
    String^ value
) override

public void ChangeDatabase (
    String value
)

public override function ChangeDatabase (
    value : String
)

Not applicable.

Parameters

  • value
    The database name.

Return Value

True if the database was changed successfully; otherwise, false.

Exceptions

Exception type Condition

ArgumentException

The database name is not valid.

InvalidOperationException

The connection is not open.

SqlCeException

The databases cannot be changed.

Remarks

The name supplied in the value parameter must be a valid database name. The name must be the full path to the database; for example, "\my app\myDB.sdf". The value parameter cannot be a null reference (Nothing in Visual Basic), be empty, or contain a string with only blank characters.

ChangeDatabase applies to the new database the same properties used to open the current database, except for the password, which will be set to an empty string.

If the new database requires a password, this call will fail. If this occurs, to change databases, you must close the original connection, specify a new connection string, and then reopen the connection.

Example

The following example shows how to switch databases while preserving the original connection options.

Dim conn As New SqlCeConnection()

' Set some connection string properties e.g.:
' 
conn.ConnectionString = _
    "Persist Security Info = False; Data Source = 'SalesData.sdf';" & _
    "Password = '<password>'; File Mode = 'shared read'; " & _
    "Max Database Size = 256; Max Buffer Size = 1024"

conn.Open()

' You can change the database while preserving 
' the orignal connection options
'
conn.ChangeDatabase("SupportData.sdf")

SqlCeConnection conn = new SqlCeConnection();

// Set some connection string properties e.g.:
// 
conn.ConnectionString = 
    "Persist Security Info = False; Data Source = 'SalesData.sdf';" +
    "Password = '<password>'; File Mode = 'shared read'; " +
    "Max Database Size = 256; Max Buffer Size = 1024";

conn.Open();

// You can change the database while preserving 
// the orignal connection options
//
conn.ChangeDatabase("SupportData.sdf");

Platforms

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

.NET Compact Framework

Supported in: 2.0, 1.0

See Also

Reference

SqlCeConnection Class
SqlCeConnection Members
System.Data.SqlServerCe Namespace