jQuery Ajax错误导致无限循环

Question

When a user tabs into a text box on a page it fires off the onfocus event to call a web service via jquery AJAX call.

If there is an error with the ajax call, I want to display a message to the user via an alert box but it is causing an infinite loop. It will display the alert box, the user clicks okay and the alert box reappears.

How do I resolve this issue?

function DoSomething() {
    var url = baseUrl + "/MyMethod";

    $.ajax({
        url: url,
        data: { input: 'MyData' },
        error: function(e) {
            alert("Display message");
        }
    });
}

<asp:Textbox id="txtMyTextBox" runat="server" onfocus="DoSomething" />

Answer 1

Bind to an actual user action like onclick or onchange , instead of onfocus . If the user hasn't entered anything, there's probably nothing useful to send to the server, right?

<asp:Textbox id="txtMyTextBox" runat="server" onclick="DoSomething" />