json和asp.net的跨域问题 [英] cross domain problem with json and asp.net
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问题描述
我正在尝试从服务器(其他域)访问数据.
我在服务器中创建了一个名为hellojson.asmx的Web服务.
例如:www.example.com/services/JsonWeb.asmx
Web服务代码:
I am trying to access the data from server(other domain).
I have a created a Webservice called hellojson.asmx which is in server
Ex: www.example.com/services/JsonWeb.asmx
Webservice code:
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["test"].ConnectionString.ToString());
string status = "";
string userid = "";
Dictionary<string,> oDict = new Dictionary<string,>();
SqlCommand com = new SqlCommand("select userid from users where username='" + x + "' and password='" + y + "'", con);
SqlDataReader dr;
if (con.State == ConnectionState.Closed)
con.Open();
dr = com.ExecuteReader();
if (dr.Read())
{
//userid = dr["UserId"].ToString();
dr.Close();
con.Close();
status = "Login Success";
SqlDataAdapter da = new SqlDataAdapter("select name from Employee", con);
DataSet ds = new DataSet();
da.Fill(ds,"employees");
object[] arr = new object[ds.Tables["employees"].Rows.Count + 1];
for (int i = 0; i <= ds.Tables["employees"].Rows.Count - 1; i++)
{
arr[i] = ds.Tables["employees"].Rows[i].ItemArray;
}
oDict.Add("employees", arr);
}
else
{
dr.Close();
con.Close();
status = "Login failed";
}
JavaScriptSerializer js = new JavaScriptSerializer();
return js.Serialize(status);
在本地主机中，我创建了一个名为 login.html
的html文件.
In Local host i have created a html file called login.html
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Login Page</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
</head>
<body>
<form method="get" action="#">
<label for="Username"><em>* </em> Username: </label>
<input type="text" id="Lusername" name="Username" class="required" />
<label for="password"><em>* </em>Password: </label>
<input type="password" id="Lpassword" name="password" class="required" />
<div class="ui-block-a"><button data-theme="c">Cancel</button></div>
<div class="ui-block-b"><button type="submit" data-theme="b">Submit</button></div>
</body>
</html>
在 javascript文件
In the javascript file
$.ajax({
contentType: "application/json; charset=utf-8",
url: "www.example.com/services/JsonWeb.asmx",
dataType: 'jsonp',
success:function(json){
// do stuff with json (in this case an array)
alert("Success");
},
error: function(xmlHttpRequest, textStatus, errorThrown) {
alert(errorThrown);
}
});
我想在警报框中显示结果..但是我无法获得结果，请帮助我..
I would like to display the result in alert box..but i am unable get the result pls help me..
推荐答案
.ajax({ contentType:" ， 网址:" ， dataType:' jsonp'， 成功:函数(json){ // 用json(在这种情况下为数组)做事 alert(" )； }， 错误:函数(xmlHttpRequest，textStatus，errorThrown){ 警报(错误抛出); } });
.ajax({ contentType: "application/json; charset=utf-8", url: "www.example.com/services/JsonWeb.asmx", dataType: 'jsonp', success:function(json){ // do stuff with json (in this case an array) alert("Success"); }, error: function(xmlHttpRequest, textStatus, errorThrown) { alert(errorThrown); } });
我想在警报框中显示结果..但是我无法得到结果，请帮助我..
I would like to display the result in alert box..but i am unable get the result pls help me..
看起来像
.getJSON在这种情况下会更有帮助.引用此线程- http://stackoverflow.com/a/2383363/312219 [ http://stackoverflow.com/questions/2414899/why-isnt-jquery-automatically-appending-the-jsonp-callback [ ^ ].这两个链接可能会对您有所帮助.
更新:我突然想起在jsfiddle小提琴中看到了类似这样的远程调用.
http://jsfiddle.net/pborreli/pJgyu/ [https://raw.github.com/kerberoS/jQuery-Tweets/master/js/jquery.tweets.0.1.js [ ^ ]
希望这会有所帮助！
.getJSON will be more helpful in this case. Refer this thread - http://stackoverflow.com/a/2383363/312219[^] and this thread http://stackoverflow.com/questions/2414899/why-isnt-jquery-automatically-appending-the-jsonp-callback[^]. These 2 links might help you.
Update: I suddenly remembered seeing something like this, remote call here in this jsfiddle fiddle.
http://jsfiddle.net/pborreli/pJgyu/[^], This uses the following jquery plugin: https://raw.github.com/kerberoS/jQuery-Tweets/master/js/jquery.tweets.0.1.js[^]
Hope this helps!
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