IFilterConsumer.SetFilter - Méthode

  • Article

Remarque : cette API est désormais obsolète.

Répond à une demande de définition d'un filtre à partir de l'événement SetFilter d'un composant WebPart fournisseur.

Espace de noms :  Microsoft.SharePoint.WebPartPages.Communication
Assembly :  Microsoft.SharePoint (dans Microsoft.SharePoint.dll)

Syntaxe

'Déclaration
<ObsoleteAttribute("Use System.Web.UI.WebControls.WebParts.IWebPartParameters instead")> _
Sub SetFilter ( _
    sender As Object, _
    setFilterEventArgs As SetFilterEventArgs _
)
'Utilisation
Dim instance As IFilterConsumer
Dim sender As Object
Dim setFilterEventArgs As SetFilterEventArgs

instance.SetFilter(sender, setFilterEventArgs)

[ObsoleteAttribute("Use System.Web.UI.WebControls.WebParts.IWebPartParameters instead")]
void SetFilter(
    Object sender,
    SetFilterEventArgs setFilterEventArgs
)

Paramètres

  • sender
    Type : System.Object

    Une référence à l'objet qui implémente l'interface IFilterProvider sur le composant WebPart fournisseur.

Exemples

L'exemple de code suivant illustre une implémentation de gestionnaire d'événements SetFilter . Cet exemple de code fait partie d'un exemple plus développé fourni pour l'interface IFilterConsumer .

' Step #9: Implement the SetFilter event handler.
' The connected provider part will call this method during its 
' PartCommunicationMain phase to set the filter on the 
' consumer Web Part.
' <param name="sender">Provider Web Part</param>
' <param name="SetFilterArgs">The args passed by the Provider</param>
Public Sub SetFilter(sender As Object, setFilterEventArgs As SetFilterEventArgs) Implements IFilterConsumer.SetFilter
   ' Ensure that all of the Web Part's controls are created.
   EnsureChildControls()
   
   ' Convert FilterExpression to the DataTable RowFilter syntax.
   If Not (setFilterEventArgs.FilterExpression Is Nothing) Then

      ' Parse the filter information.
      Dim values As String() = setFilterEventArgs.FilterExpression.Split(New [Char]() {"&"c})
      If values.Length > 1 Then
         Dim j As Integer = 1 'counts the number of Field/Value pairs
         Dim filterField As String = String.Empty
         Dim filterValue As String = String.Empty
         Dim filterAnd As String = " AND "
         _rowFilterExpression = String.Empty
         
         Dim i As Integer
         For i = 0 To values.Length - 1
            ' Clear values.
            filterField = String.Empty
            filterValue = String.Empty
      
            ' Create label portion of name/value pairs.
            Dim currField, currValue As String
            currField = FieldLabel + j.ToString() + "="
            currValue = ValueLabel + j.ToString() + "="
            j += 1
      
            ' Extract just the field name by replacing the rest of the 
            ' string with string.Empty.
            filterField = filterField + values(i).Replace(currField, String.Empty)
            
            ' Move to next item in the array which is the value 
            ' component.
            i += 1

            ' Extract just the Value by replacing the rest of the 
            ' string with string.Empty.
            filterValue = filterValue + values(i).Replace(currValue, String.Empty)
      
            ' Contruct the row filter expression.
            _rowFilterExpression += filterField + "=" + "'" + filterValue + "'" + filterAnd
         Next i 
         ' Trim Off the trailing 'And'.
         If _rowFilterExpression.Length <> 0 Then
            _rowFilterExpression = _rowFilterExpression.Substring(0, _rowFilterExpression.Length - filterAnd.Length)
         End If 
         ' Store _rowFilterExpression for use by NoFilter event.
         _cachedRowFilter.Text = _rowFilterExpression
      End If
   End If
End Sub

// Step #9: Implement the SetFilter event handler.
// The connected provider part will call this method during its 
// PartCommunicationMain phase to set the filter on the consumer 
// Web Part.
// <param name="sender">Provider Web Part</param>
// <param name="SetFilterArgs">The args passed by the Provider</param>

public void SetFilter(object sender, SetFilterEventArgs setFilterEventArgs)
{
    // Ensure that all of the Web Part's controls are created.
    EnsureChildControls();

    // Convert FilterExpression to the DataTable RowFilter syntax.
    if(setFilterEventArgs.FilterExpression != null)
    {

        // Parse the filter information.
        string[] values = setFilterEventArgs.FilterExpression.Split(new Char[] {'&'});
        if (values.Length > 1)
        {
            int j = 1;  //counts the number of Field/Value pairs
            string filterField = string.Empty;
            string filterValue = string.Empty;
            string filterAnd = " AND ";
            _rowFilterExpression = string.Empty;

            for(int i=0; i < values.Length; i++)
            {
                // Clear values.
                filterField = string.Empty;
                filterValue = string.Empty;

                // Create label portion of name/value pairs.
                string currField, currValue;
                currField = FieldLabel + j + "=";
                currValue = ValueLabel + j + "=";
                j++;  
                    
                // Extract just the field name by replacing the rest of 
                // the string with string.Empty.
                filterField = filterField + values[i].Replace(currField, string.Empty);
                    
                // Move to next item in the array which is the value 
                // component.
                i++;
                
                // Extract just the Value by replacing the rest of the 
                // string with string.Empty.
                filterValue = filterValue + values[i].Replace(currValue, string.Empty);

                // Contruct the row filter expression.
                _rowFilterExpression += filterField + "=" + "'" + filterValue + "'" + filterAnd;

            }
            // Trim Off the trailing 'And'.
            if (_rowFilterExpression.Length != 0)
                _rowFilterExpression = _rowFilterExpression.Substring(0,_rowFilterExpression.Length - filterAnd.Length);

            // Store _rowFilterExpression for use by NoFilter event.
            _cachedRowFilter.Text = _rowFilterExpression;
        }
    }
}

Voir aussi

Référence

IFilterConsumer interface

IFilterConsumer - Membres

Microsoft.SharePoint.WebPartPages.Communication - Espace de noms