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ParameterCollection.Remove(Parameter) Méthode

  • Référence

Définition

Espace de noms:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Supprime de la collection Parameter l'objet ParameterCollection spécifié.

public:
 void Remove(System::Web::UI::WebControls::Parameter ^ parameter);
public void Remove (System.Web.UI.WebControls.Parameter parameter);
member this.Remove : System.Web.UI.WebControls.Parameter -> unit
Public Sub Remove (parameter As Parameter)

Paramètres

parameter
Parameter

Parameter à supprimer de ParameterCollection.

Exemples

L’exemple de code suivant montre comment utiliser la Remove méthode et l’indexeur Item[] pour supprimer un Parameter objet d’une ParameterCollection collection. Dans cet exemple, plusieurs QueryStringParameter objets sont ajoutés à une SelectParameters collection, un QueryStringParameter objet est supprimé de la collection et l’ordre de la collection est imprimé lors du chargement de la page.

<%@page Language="C#" %>
<SCRIPT runat="server">
private void Page_Load(object sender, EventArgs e) {

    SqlDataSource aSqlDataSource = new SqlDataSource();

    // Security Note: The SqlDataSource uses a QueryStringParameter,
    // Security Note: which does not perform validation of input from the client.

    QueryStringParameter qs1 =
        new QueryStringParameter("QueryStringParam1","requestfield1");
    aSqlDataSource.SelectParameters.Add(qs1);

    QueryStringParameter qs2 =
        new QueryStringParameter("QueryStringParam2","requestfield2");
    aSqlDataSource.SelectParameters.Add(qs2);

    QueryStringParameter qs3 =
        new QueryStringParameter("QueryStringParam3","requestfield3");
    aSqlDataSource.SelectParameters.Add(qs3);

    // Remove the QueryStringParameter named QueryStringParameter2
    // using the Remove method and the ParameterCollection indexer
    // property.
    aSqlDataSource.SelectParameters.Remove( aSqlDataSource.SelectParameters["QueryStringParam2"] );

    // Iterate through the ParameterCollection and print out the
    // names of the Parameters contained by it.
    foreach (Parameter aParameter in aSqlDataSource.SelectParameters) {
        Response.Write(aParameter.Name + "<BR>");
    }
}
</SCRIPT>

<%@page Language="VB" %>
<SCRIPT runat="server">
Sub Page_Load(sender As Object, e As EventArgs)

    Dim aSqlDataSource As New SqlDataSource()

    ' Security Note: The SqlDataSource uses a QueryStringParameter,
    ' Security Note: which does not perform validation of input from the client.

    Dim qs1 As New QueryStringParameter("QueryStringParam1","requestfield1")
    aSqlDataSource.SelectParameters.Add(qs1)

    Dim qs2 As New QueryStringParameter("QueryStringParam2","requestfield2")
    aSqlDataSource.SelectParameters.Add(qs2)

    Dim qs3 As New QueryStringParameter("QueryStringParam3","requestfield3")
    aSqlDataSource.SelectParameters.Add(qs3)

    ' Remove the QueryStringParameter named QueryStringParameter2
    ' using the Remove method and the ParameterCollection indexer
    ' property.
    aSqlDataSource.SelectParameters.Remove( aSqlDataSource.SelectParameters("QueryStringParam2") )

    ' Iterate through the ParameterCollection and print out the
    ' names of the Parameters contained by it.
    Dim aParameter As Parameter
    For Each aParameter in aSqlDataSource.SelectParameters
        Response.Write(aParameter.Name & "<BR>")
    Next
End Sub ' Page_Load
</SCRIPT>

Remarques

Utilisez cette méthode pour supprimer l’objet spécifié Parameter d’une ParameterCollection collection.

S’applique à

Voir aussi