我正在努力使JavaScript与C#一起工作。现在,我只是想从C#中检索(GET)返回结果并通过JavaScript显示它。稍后,它将用于数据库写入(POST)。就像这样,在阅读之后,在这里我被卡住了:
我有按钮:
<button id="btn" onclick="Create();">CREATE</button>
然后是JS代码:
function Create() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function () {
if (xhttp.readyState == 4 && xhttp.status == 200) {
alert(xhttp.response)
}
};
xhttp.open("GET", "default.aspx/Create", true);
xhttp.send();
}
然后是C#WebMethod:
[WebMethod]
public static string Create()
{
return "WebMethod";
}
那么,我怎样才能获得&#34; WebMethod&#34;值&#34; onreadystatechange&#34;?并制作所有数据JSON?不需要为我编码,只是指出我正确的方向,就像我在这个概念上失败一样,因为我在正确的方式上阅读了许多相互矛盾的观点。没有jQuery。
答案 0 :(得分:0)
要从java脚本调用C#方法,您必须使用ajax。以下是如何从java脚本或jquery调用c#方法的示例。
http://www.c-sharpcorner.com/UploadFile/8911c4/how-to-call-C-Sharp-methodfunction-using-jquery-ajax/
答案 1 :(得分:-1)
这可以为您提供与jQuery结合的起点:
/ * test.html * /
<script>
function Create() {
// create some data object here
var data = {
value1: 'string 1',
value2: 'string 2',
value3: 'string 3'
};
// post data to c# web service (web method)
$.ajax({
url: 'default.aspx/processData', // the path to the *.aspx-file has to correct here!
type: 'POST',
dataType: 'json',
contentType: 'application/json; charset=utf-8',
data: JSON.stringify({ formData: data }),
async: true,
success: function (msg, status) {
console.log(msg.d);
},
failure: function (data) {
console.log(msg.d);
},
error: function (jqXHR, textStatus, errorThrown) {
console.log(textStatus + " : " + errorThrown);
}
});
return false;
}
</script>
<button onclick="Create();">Create</button>
/ * default.aspx * /
<%@ Page Language="C#" Src="default.aspx.cs" Inherits="main" %>
/ * default.aspx.cs * /
using System;
using System.Web.Services;
using System.Web.UI;
public class main : Page {
protected void Page_Load(object sender, EventArgs e) { }
[WebMethod]
public static string processData(FormData formData) {
//access your data object here e.g.:
string val1 = formData.value1;
string val2 = formData.value2;
string val3 = formData.value3;
return val1;
}
// the FormData Class here has to have the same properties as your JavaScript Object!
public class FormData {
public FormData() { }
public string value1 { get; set; }
public string value2 { get; set; }
public string value3 { get; set; }
}
}