This example demonstrates how to obtain server data from the client. A temporary client property—cpPageIndex—is declared within the ASPxGridView.CustomJSProperties event handler. This property holds the index of the currently active page, and can be accessed on the client side.
protected void ASPxGridView1_CustomJSProperties(object sender,
DevExpress.Web.ASPxGridViewClientJSPropertiesEventArgs e) {
e.Properties["cpPageIndex"] = ASPxGridView1.PageIndex;
}
Protected Sub ASPxGridView1_CustomJSProperties(ByVal sender As Object, ByVal e As DevExpress.Web.ASPxGridViewClientJSPropertiesEventArgs)
e.Properties("cpPageIndex") = ASPxGridView1.PageIndex
End Sub
<input id="Button1" type="button" value="Active Page" onclick="alert(grid.cpPageIndex)" />