如何从JavaScript调用RazorPage中指定的OnGet方法？

核心原因：URL参数格式错误 #

你构造请求URL时，第二个参数使用了问号?，这会导致handler参数的值被识别为NextEmployee?employeeId，而非预期的NextEmployee，因此框架找不到对应的OnGetNextEmployee方法，只能 fallback 到默认的OnGet。

解决方案：修正URL参数分隔符 #

将URL中第二个参数的?替换为&，正确的URL格式应为：

var wnd = window.parent.$("#DetailWnd").data("kendoWindow");
var _url = "/MyRazorPage?handler=NextEmployee&employeeId=" + $('#EmployeeId').val();
wnd.refresh({
    url: _url
});

额外优化建议 #

你当前在自定义方法中直接调用OnGet方法的方式不符合Razor Page的请求处理规范，建议改用RedirectToPage进行重定向，确保请求流程正确：

public IActionResult OnGetNextEmployee(int employeeId)
{
    int index = ISP.EmployeeIds.FindIndex(id => id == employeeId);

    if(index == -1 || index == ISP.EmployeeIds.Count - 1) 
    {
        return RedirectToPage("./MyRazorPage", new { employeeId });
    }
    else
    {
        int nextEmployeeId = ISP.EmployeeIds[index + 1];
        return RedirectToPage("./MyRazorPage", new { employeeId = nextEmployeeId });
    }
}

public IActionResult OnGetPreviousEmployee(int employeeId)
{
    int index = ISP.EmployeeIds.FindIndex(id => id == employeeId);

    if (index == -1 || index == 0) 
    {
        return RedirectToPage("./MyRazorPage", new { employeeId });
    }
    else
    {
        int previousEmployeeId = ISP.EmployeeIds[index - 1];
        return RedirectToPage("./MyRazorPage", new { employeeId = previousEmployeeId });
    }
}

内容的提问来源于stack exchange，提问作者Legion