调用代码从JavaScript功能的背后（而不是AJAX！） [英] Call Code Behind Function from JavaScript (not AJAX!)

问题描述

我有我的服务器端的功能。

I have a function on my server side.

protected void SelectParticipant(string CompanyId, string EmployeeNumber)
{
    //I do some stuff here.
}

我想从JavaScript调用该函数在客户端上。我试图寻找它，但我发现建议是调用通过AJAX页面方法。我不想说，我要进行回传。

I want to call this function from JavaScript on the client side. I've tried searching for it, but all the suggestions I found were for calling a Page Method via AJAX. I don't want that, I want to cause a postback.

function MyJSFunction(companyid, employeenumber)
{
    //cause postback and pass the companyid and employee number
    //this is where I need help!
}

我怎么能进行回传，并从我的JavaScript运行服务器端的功能？

How can I cause a postback and run a server side function from my JavaScript?

推荐答案

下面是我做到了......

Here's how I did it...

<script type="text/javascript">
function AddParticipant(companyid, employeenumber)
    {
        $("#AddParticipantPanel").dialog("close");
        var myargs = {CompanyId: companyid, EmployeeNumber: employeenumber};
        var myargs_json = JSON.stringify(myargs);
        __doPostBack('<%= SelectParticipantBtn.UniqueID %>', myargs_json);
    }
</script>
<asp:Button runat="server" ID="SelectParticipantBtn" ClientIDMode="Static" OnClick="SelectParticipantBtn_Click" style="display:none;" />

和服务器端...

/* this is an inner class */
public class SelectParticipantEventArgs
{
    public string CompanyId {get; set;}
    public string EmployeeNumber {get; set;}
}
protected void SelectParticipantBtn_Click(object sender, EventArgs e)
{   
    string args = Request.Form["__EVENTARGUMENT"];
    var myargs = JsonConvert.DeserializeObject<SelectParticipantEventArgs>(args);
    string emp_no = myargs.EmployeeNumber;
    string company_id = myargs.CompanyId;
    //do stuff with my arguments
}

而不是使用HiddenFields的，我用了隐藏式按键。这种模式效果更好，因为我可以直接到该按钮的事件处理程序，而不必添加代码到Page_Load功能。

Instead of using HiddenFields, I used a hidden button. This model works better because I can go directly to the button's event handler instead of having to add code to the Page_Load function.

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