RichEditBuilder.OnBeforeSend(String) Method

Specifies a function used to customize a web request before it is sent to an action handler.

Namespace: DevExpress.AspNetCore.RichEdit

Assembly: DevExpress.AspNetCore.RichEdit.v25.1.dll

NuGet Package: DevExpress.AspNetCore.RichEdit

Declaration

public RichEditBuilder OnBeforeSend(
    string callback
)

Parameters

Name	Type	Description
callback	String	A JavaScript function.

Returns

Type	Description
RichEditBuilder	A reference to this instance after the method is called.

Remarks

Use this method to register a client-side handler for the Rich Text Editor control’s beforeSend event. The handler can be a reference to an external function or an inline function text:

Reference

<script>
function richEdit_beforeSend(richEdit, e) {
    /* ... */
}
</script>

@(Html.DevExpress().RichEdit("richEdit")
    .ExportUrl(Url.Page(pageName: null, pageHandler: "DxRichEditExport"))
    .OnBeforeSend("richEdit_beforeSend")
)

Inline Function

@(Html.DevExpress().RichEdit("richEdit")
    .ExportUrl(Url.Page(pageName: null, pageHandler: "DxRichEditExport"))
    .OnBeforeSend(@<text>
        function(richEdit, e) {
            /* ... */
        }
    </text>)
)

The function receives the following arguments:

• The client-side Rich Text Editor object instance.
• An object that contains event arguments. Use the object’s request property to access and modify the underlying XMLHttpRequest (for example, add headers).

The following code snippet adds an anti‑forgery token to every internal request the Rich Text Editor sends to the request handler (controller action):

@inject Microsoft.AspNetCore.Antiforgery.IAntiforgery Antiforgery

<script>
    function richEdit_beforeSend(richEdit, e) {
        e.request.setRequestHeader("RequestVerificationToken",
                                   "@Antiforgery.GetAndStoreTokens(HttpContext).RequestToken");
    }
</script>

@(Html.DevExpress().RichEdit("richEdit")
    .ExportUrl(Url.Page(pageName: null, pageHandler: "DxRichEditExport"))
    .OnBeforeSend("richEdit_beforeSend")
)