IStateFormatter.Serialize(Object) Method

Reference

Definition

Namespace:: System.Web.UI

Assembly:: System.Web.dll

Important

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Serializes ASP.NET Web server control state to string form.

public:
 System::String ^ Serialize(System::Object ^ state);

public string Serialize (object state);

abstract member Serialize : obj -> string

Public Function Serialize (state As Object) As String

Parameters

state: Object

The object that represents the view state of the Web server control to serialize to string form.

Returns

String

A string that represents a Web server control's view state.

Examples

The following code example demonstrates how the Serialize method persists view state information to a file. The Save method of the StreamPageStatePersister class uses the IStateFormatter interface inherited from the PageStatePersister class to serialize view state. This code example is part of a larger example provided for the IStateFormatter interface.

//
// Persist any ViewState and ControlState.
//
public override void Save()
{

    if (ViewState != null || ControlState != null)
    {
        if (Page.Session != null)
        {
            Stream stateStream = GetSecureStream();

            StreamWriter writer = new StreamWriter(stateStream);

            IStateFormatter formatter = this.StateFormatter;
            Pair statePair = new Pair(ViewState, ControlState);

            // Serialize the statePair object to a string.
            string serializedState = formatter.Serialize(statePair);

            writer.Write(serializedState);
            writer.Close();
            stateStream.Close();
        }
        else
        {
            throw new InvalidOperationException("Session needed for StreamPageStatePersister.");
        }
    }
}

'
' Persist any ViewState and ControlState.
'
Public Overrides Sub Save()

    If Not (ViewState Is Nothing) OrElse Not (ControlState Is Nothing) Then
        If Not (Page.Session Is Nothing) Then

            Dim stateStream As Stream
            stateStream = GetSecureStream()

            ' Write a state string, using the StateFormatter.
            Dim writer As New StreamWriter(stateStream)

            Dim formatter As IStateFormatter
            formatter = Me.StateFormatter

            Dim statePair As New Pair(ViewState, ControlState)

            Dim serializedState As String
            serializedState = formatter.Serialize(statePair)

            writer.Write(serializedState)
            writer.Close()
            stateStream.Close()
        Else
            Throw New InvalidOperationException("Session needed for StreamPageStatePersister.")
        End If
    End If
End Sub

Remarks

Use the Serialize method to transform an object state graph to string form. Reconstitute a state object from the string using the Deserialize method.

Applies to

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