Overview
ASMX-style page methods expose [WebMethod] static methods on Web Forms pages consumable via JSON POST.
Enable ScriptManager and configure authentication appropriately.
Implementation
Mark method [WebMethod] public static Result DoWork(Input data). jQuery: $.ajax({ url: 'Page.aspx/DoWork', type: 'POST', contentType: 'application/json', data: JSON.stringify({ data: payload }) }).
Parse response.d wrapper in classic ASP.NET AJAX.
When implementing guidance from ASP.NET calling Webmethod using jQuery, start in a controlled environment that mirrors production versions of operating systems, runtimes, and network policies. Capture a baseline before changes: export configs, snapshot VMs, or tag releases in source control so rollback stays straightforward if behavior regresses.
Document prerequisites, expected outcomes, and verification steps in a short runbook. Automated checks—smoke tests, health endpoints, or query validations—catch regressions early when platforms receive patches. Security belongs in every workflow: apply least privilege, rotate secrets, and review audit logs after deployment.
If results differ across machines, compare environment variables, permission models, time zones, and regional settings. Intermittent issues often trace to caching layers, stale DNS, or duplicated services bound to the same port.
Example
$.ajax({
url: 'Services.aspx/Add',
method: 'POST',
contentType: 'application/json; charset=utf-8',
dataType: 'json',
data: JSON.stringify({ a: 1, b: 2 }),
success: r => console.log(r.d)
});Tips
- Web API replaces page methods in new apps.
- Validate anti-forgery if authenticated.
- Static methods cannot access instance controls.
- EnableSession for session state.
- Re-verify after reboots, certificate renewals, or failover exercises.
- Align monitoring and alerts with the failure modes described in this guide.
- Keep vendor documentation links handy for breaking changes between versions.
- Pair automation with a manual spot check during initial production rollout.