CallbackEventArgs.Result Property

Gets or sets a string that contains specific information (if any) that needs to be passed to the client side for further processing.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v22.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public string Result { get; set; }

VB.NET

Public Property Result As String

Property Value

Type	Description
String	A string value that represents any information that needs to be sent to the client-side ASPxClientCallback.CallbackComplete event.

Remarks

Use the Result property if you need to pass some information to the client side to perform some client-side processing in the ASPxClientCallback.CallbackComplete event’s handler. You can pass the required information via the Result property. Typically, this can be the result of server-side processing of the CallbackEventArgsBase.Parameter property value.

Example

The complete sample project is available in the DevExpress Code Central database at E36.

JS

function ShowImage(id) {
    if (ASPxCallback1.InCallback()) 
        return;
    document.getElementById('imageCell').innerHTML = 'Loading...';
    ASPxCallback1.PerformCallback(id);
}

ASPX

<script runat="server">
     protected void Page_Load(object sender, EventArgs e) {

     }
     protected void ASPxCallback1_Callback(object source, 
         DevExpress.Web.CallbackEventArgs e) {
         string xpath = string.Format("//items/item[@id='{0}']", e.Parameter);
         XmlNode node = XmlDataSource2.GetXmlDocument().SelectSingleNode(xpath);
         if(node != null) {
             LargeImage.ImageUrl = "Images/" + node.Attributes["FileName"].Value;
             LargeImage.AlternateText = node.Attributes["Text"].Value;
             LargeImageText.Text = node.Attributes["Text"].Value; 
         }
         e.Result = ASPxCallback.GetRenderResult(ImagePanel);
     }
 }
</script>

...
         <dxcb:ASPxCallback ID="ASPxCallback1" runat="server" 
             OnCallback="ASPxCallback1_Callback">
             <ClientSideEvents CallbackComplete="function(s, e) {
     document.getElementById('imageCell').innerHTML = e.result;
 }" />
         </dxcb:ASPxCallback>
...