从javascript函数调用C＃方法
[英]Call C# method from javascript function
问题描述
I need to call the c# method from javascript. 
我需要从javascript调用c＃方法。 I need the method to be called only when the javascript button is clicked ie (btnclick()). 我只需要单击javascript按钮即（btnclick（））才能调用该方法。 But Login method gets executed before the onclick of button. 但是Login方法在按钮的onclick之前执行。
aspx file aspx文件
<script type="text/javascript">
function btnclick()
{
<%=Login() %>; //calling the c# method
};
$(document).ready(function ()
{
$(".username").focus(function () {
$(".user-icon").css("left", "-48px");
});
</script>
<body>
//contains other elements like username and password text boxes
<input type="submit" id="submit" name="submit" value="Login" class="button" onclick="btnclick()"/>
</body>
aspx.cs file aspx.cs文件
The following c# method have to be called from javascript 必须从javascript调用以下c＃方法
protected void Login()
{
//contains method for authentication
}
Is there any other way to call c# method from javascript. 还有其他方法可以从javascript调用c＃方法。
4 个解决方案
解决方案1
1 2014-06-03 09:41:42
Your question exposes your lack of knowledge about how websites work. 您的问题暴露出您对网站工作原理的知识不足。 You simply cannot execute C# function form javascript code like: 您根本无法执行C＃函数形式的javascript代码，例如：
function btnclick()
{
<%=Login() %>; //calling the c# method
};
because javascript is running in the browser and the C# on the server. 因为javascript在浏览器中运行，而C＃在服务器上运行。 The reason that your C# Login method was called is that your button is configured to submit the form and the form I suppose is pointing to your server. 调用C＃登录方法的原因是您的按钮已配置为提交表单，而我想该表单指向您的服务器。
解决方案2
0 2014-06-03 09:41:35
Have you tried adding an api controller and putting the method in that? 您是否尝试过添加api控制器并将方法放入其中？ I really like using ProxyApi (it's as simple as adding a NuGet) and it generates clean javascript proxies for you. 我真的很喜欢使用ProxyApi（就像添加NuGet一样简单），它会为您生成干净的javascript代理。 You'll get it up and running in just a few minutes: 您将在几分钟之内启动并运行它：
- Add an ApiController and add the Login method. 添加一个ApiController并添加Login方法。
- Add ProxyApi through NuGet and reference it in javascript: [script src="~/api/proxies"][/script] 通过NuGet添加ProxyApi并在javascript中引用它：[script src =“〜/ api / proxies”] [/ script]
Call your C# method in javascript like this:
像这样在javascript中调用您的C＃方法： $.proxies.myapi.login(some params).done( function(data) { // done! });
$ .proxies.myapi.login（一些参数）.done（函数（数据）{//完成！}）;
see: https://github.com/stevegreatrex/ProxyApi 参见： https : //github.com/stevegreatrex/ProxyApi
解决方案3
-1 2014-06-03 09:38:47
You can define c# method as webmethod. 您可以将c＃方法定义为webmethod。
Try It: 试试吧：
[WebMethod]
protected void Login()
{
//contains method for authentication
}
Thanks. 谢谢。
解决方案4
-1 2017-03-20 18:56:21
<script language="javascript" type="text/javascript">
function jsFunction()
{
document.getElementById('<%=lbSubmit.ClientID%>').click();
}
</script>
<asp:LinkButton ID="lbSubmit" runat="server" Text="Update Files"
onclick="cshapbottun_Click" ></asp:LinkButton>
C# code
protected void cshapbottun_Click(object sender, EventArgs e)
{
// DoSomething;
}
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