ASPxCardView.AfterPerformCallback Event

Fires after a callback or a postback initiated by the control has been processed on the server.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v19.1.dll

Declaration

C#

public event ASPxCardViewAfterPerformCallbackEventHandler AfterPerformCallback

VB.NET

Public Event AfterPerformCallback As ASPxCardViewAfterPerformCallbackEventHandler

Event Data

The AfterPerformCallback event's data class is ASPxCardViewAfterPerformCallbackEventArgs. The following properties provide information specific to this event:

Property	Description
Args	Gets specific information (if any) passed from the client side. Inherited from ASPxGridAfterPerformCallbackEventArgs.
CallbackName	Gets the callback name. Inherited from ASPxGridAfterPerformCallbackEventArgs.

Remarks

Handle the AfterPerformCallback event to perform actions after a callback or a postback initiated by the control has been processed on the server. Use the ASPxGridAfterPerformCallbackEventArgs.CallbackName property to identify the processed callback (e.g., ‘STARTEDIT’, CUSTOMCALLBACK’, etc.).

Example

This example illustrates how to handle the AfterPerformCallback event to perform simple actions depending on the callback type.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/aspxcardview-how-to-handle-the-aspxcardviewafterperformcallback-event-t281534

Default.aspx (C#)

<dx:ASPxCardView ID="ASPxCardView1" runat="server" ClientInstanceName="cardview" DataSourceID="AccessDataSource1" OnAfterPerformCallback="ASPxCardView1_AfterPerformCallback" KeyFieldName="CustomerID" AutoGenerateColumns="False">
<Columns>
    <dx:CardViewTextColumn FieldName="CompanyName" VisibleIndex="1">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="ContactName" VisibleIndex="2">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="City" VisibleIndex="5">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="Region" VisibleIndex="6">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="Country" VisibleIndex="8">
    </dx:CardViewTextColumn>
</Columns>
<CardLayoutProperties>
    <Items>
        <dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowSelectCheckbox="True" ShowEditButton="True">
        </dx:CardViewCommandLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Company Name">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Contact Name">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="City">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Region">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Country">
        </dx:CardViewColumnLayoutItem>
        <dx:EditModeCommandLayoutItem HorizontalAlign="Right">
        </dx:EditModeCommandLayoutItem>
    </Items>
</CardLayoutProperties>
</dx:ASPxCardView>       
<br />
<dx:ASPxButton ID="ASPxButton1" AutoPostBack="False" runat="server" Text="Custom Callback">
    <ClientSideEvents Click="function(s, e) {
        cardview.PerformCallback(); 
    }" />
</dx:ASPxButton>
<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/nwind.mdb"
    SelectCommand="SELECT * FROM [Customers]" />

Default.aspx.cs

using DevExpress.Web;


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ASPxCardView1_AfterPerformCallback(object sender, ASPxCardViewAfterPerformCallbackEventArgs e)
    {
        if (e.CallbackName == "STARTEDIT")
        {
            ASPxCardView1.Columns[0].ReadOnly = true;            
        }

        if (e.CallbackName == "CUSTOMCALLBACK")
        {
            ASPxCardView1.Selection.UnselectAll();
        }
    }
}

Default.aspx.vb

Imports DevExpress.Web


Partial Public Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    End Sub
    Protected Sub ASPxCardView1_AfterPerformCallback(ByVal sender As Object, ByVal e As ASPxCardViewAfterPerformCallbackEventArgs)
        If e.CallbackName = "STARTEDIT" Then
            ASPxCardView1.Columns(0).ReadOnly = True
        End If

        If e.CallbackName = "CUSTOMCALLBACK" Then
            ASPxCardView1.Selection.UnselectAll()
        End If
    End Sub
End Class

Default.aspx (VB.NET)

<dx:ASPxCardView ID="ASPxCardView1" runat="server" ClientInstanceName="cardview" DataSourceID="AccessDataSource1" OnAfterPerformCallback="ASPxCardView1_AfterPerformCallback" KeyFieldName="CustomerID" AutoGenerateColumns="False">
<Columns>
    <dx:CardViewTextColumn FieldName="CompanyName" VisibleIndex="1">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="ContactName" VisibleIndex="2">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="City" VisibleIndex="5">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="Region" VisibleIndex="6">
    </dx:CardViewTextColumn>
    <dx:CardViewTextColumn FieldName="Country" VisibleIndex="8">
    </dx:CardViewTextColumn>
</Columns>
<CardLayoutProperties>
    <Items>
        <dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowSelectCheckbox="True" ShowEditButton="True">
        </dx:CardViewCommandLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Company Name">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Contact Name">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="City">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Region">
        </dx:CardViewColumnLayoutItem>
        <dx:CardViewColumnLayoutItem ColumnName="Country">
        </dx:CardViewColumnLayoutItem>
        <dx:EditModeCommandLayoutItem HorizontalAlign="Right">
        </dx:EditModeCommandLayoutItem>
    </Items>
</CardLayoutProperties>
</dx:ASPxCardView>       
<br />
<dx:ASPxButton ID="ASPxButton1" AutoPostBack="False" runat="server" Text="Custom Callback">
    <ClientSideEvents Click="function(s, e) {
        cardview.PerformCallback(); 
    }" />
</dx:ASPxButton>
<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/nwind.mdb"
    SelectCommand="SELECT * FROM [Customers]" />