IParametersInProvider.NoParametersIn-Ereignis
HINWEIS: Diese API ist veraltet.
Tritt auf, wenn keine Parameterliste verfügbar, an die Consumer-Webpart gesendet werden vorhanden ist.
Namespace: Microsoft.SharePoint.WebPartPages.Communication
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Syntax
'Declaration
<ObsoleteAttribute("Use System.Web.UI.WebControls.WebParts.IWebPartParameters instead")> _
Event NoParametersIn As NoParametersInEventHandler
'Usage
Dim instance As IParametersInProvider
Dim handler As NoParametersInEventHandler
AddHandler instance.NoParametersIn, handler
[ObsoleteAttribute("Use System.Web.UI.WebControls.WebParts.IWebPartParameters instead")]
event NoParametersInEventHandler NoParametersIn
Hinweise
Ein Webpart, das die IParametersInProvider -Schnittstelle implementiert sollte immer die ParametersInReady oder das NoParametersIn -Ereignis ausgelöst. Einige Webparts Verhalten möglicherweise nicht ordnungsgemäß, wenn sie keine dieser Informationen erhalten. Lösen Sie das ParametersInReady -Ereignis, um die Parameter zu senden. Lösen Sie das NoParametersIn -Ereignis, um darauf hinzuweisen, dass keine in den Parametern Änderung.
Beispiele
Das folgende Codebeispiel zeigt eine überschriebene PartCommunicationMain -Methode, die das NoParametersIn -Ereignis wird ausgelöst. Dieses Codebeispiel ist Teil eines umfangreicheren Beispiels für die IParametersInProvider -Schnittstelle.
Public Overrides Sub PartCommunicationMain()
' Ensure that all of the Web Part's controls are created.
EnsureChildControls()
'Check if connected
If _connected Then
' Create the ParametersInReadyEventArgs object for the ParametersInReady event.
Dim parametersInReadyEventArgs As New ParametersInReadyEventArgs()
If _parametersReadyButtonClicked Then 'ParametersInReady Button was clicked
' Set the parameter values to the text box values.
If Not (_fieldList Is Nothing) Then
parametersInReadyEventArgs.ParameterValues = New String(_fieldList.Length) {}
Dim index As Integer
For index = 0 To _fieldList.Length - 1
parametersInReadyEventArgs.ParameterValues(index) = _fontAttributeTextBox(index).Text
Next index
' Fire the ParametersInReady event.
RaiseEvent ParametersInReady(Me, parametersInReadyEventArgs)
'_fieldList is null
Else
' Fire the event.
RaiseEvent NoParametersIn(Me, New EventArgs())
End If
_parametersReadyButtonClicked = False
ElseIf _noParametersInButtonClicked Then 'NoParametersIn Button was clicked
' Fire the NoParametersIn event.
RaiseEvent NoParametersIn(Me, New EventArgs())
_noParametersInButtonClicked = False
End If
End If
End Sub
// Step #7: Implement the PartCommunicationMain() method.
// The PartCommunicationMain method is called by the Web Part
// infrastructure on the client during the ASP.NET PreRender
// event to allow the part to pass its primary data to the other
// connected parts.
// It is important to always fire either the ParametersInReady or the
// NoParametersIn event. Some parts
// may not behave properly if they are left waiting for this
// information.
// ParametersInReady should be fired to send the parameters.
// NoParametersIn should be fired to indicate that there is no change
// in the parameters.
public override void PartCommunicationMain()
{
// Ensure that all of the Web Part's controls are created.
EnsureChildControls();
//Check if connected
if(_connected)
{
// If there is a listener, fire the ParametersInReady event.
if(ParametersInReady != null)
{
// Create the ParametersInReadyEventArgs object for the ParametersInReady event.
ParametersInReadyEventArgs parametersInReadyEventArgs = new ParametersInReadyEventArgs();
if(_parametersReadyButtonClicked) //ParametersInReady Button was clicked
{
// If there is a listener, fire the ParametersInReady
// event.
if(ParametersInReady != null)
{
// Set the parameter values to the text box values.
if (_fieldList != null)
{
parametersInReadyEventArgs.ParameterValues = new string[_fieldList.Length];
for (int index = 0; index < _fieldList.Length; index++)
{
parametersInReadyEventArgs.ParameterValues[index] = _fontAttributeTextBox[index].Text;
}
// Fire the ParametersInReady event.
ParametersInReady(this, parametersInReadyEventArgs);
}
else //_fieldList is null
{
// If there is a listener, fire the NoParametersIn event.
if(NoParametersIn != null)
{
// Fire the event.
NoParametersIn(this, new EventArgs());
}
}
_parametersReadyButtonClicked = false;
}
}
else if(_noParametersInButtonClicked) //NoParametersIn Button was clicked
{
// If there is a listener, fire the NoParametersIn
// event.
if(NoParametersIn != null)
{
// Fire the NoParametersIn event.
NoParametersIn(this, new EventArgs());
_noParametersInButtonClicked = false;
}
}
}
}
}