blocks|key|195823|text|对于您的contentType:+'application/json;+charset=utf-8'，您声称将发送JSON，但目前您的data属性并未包含JSON。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|195824|您需要使用JSON.stringify方法将data转换为JSON：|195825|因此，将您的data属性更改为：|195826|data:+JSON.stringify({
++++"projectSoid":+ProjectId,
++++"startDate":+StartDate,
++++"endDate":+EndDate,
++++"clientManager":+ClientManager
}),|code-block|syntax|javascript|195827|您应该注意到，较旧的浏览器本身并不支持JSON.stringify方法，因此您可能需要使用以下各种库中的一个来提供实现：|195828|道格拉斯·克罗克福德的JSON2+library.|195829|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/douglascrockford/JSON-js/blob/master/json2.js^0|4|1A|1V|4|0|5|E|M|4|0|6|4|0|0|J|E|0|B|E|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1D|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1H|8|@]|D|@$9|1I|A|1J|1|1K]]|E|$]]|$1|S|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

With your <code>contentType: 'application/json; charset=utf-8'</code> you are claiming that you will send JSON but currently your <code>data</code> property is not holding JSON.

You need to transform your <code>data</code> to JSON with the <code>JSON.stringify</code> method:

So change your <code>data</code> property to:

<pre><code>data: JSON.stringify({
 "projectSoid": ProjectId,
 "startDate": StartDate,
 "endDate": EndDate,
 "clientManager": ClientManager
}),
</code></pre>

You should note that the <code>JSON.stringify</code> method is not natively supported in older browsers so you may need to provide an implementation with using one of the various libraries like: 

Douglas Crockford's <a href="https://github.com/douglascrockford/JSON-js/blob/master/json2.js">JSON2 library.</a>

blocks|key|195835|text|客户端上的Javascript|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|195836|+var+items+=+[{+projectSoid:+ProjectId,+startDate:+StartDate,+endDate:+EndDate,+clientManager:+ClientManager+}];


+++++++++++++++++++$.ajax({
+++++++++++++++++++++++url:+'"../Member/Home.aspx/SaveClient',
+++++++++++++++++++++++type:+"POST",
+++++++++++++++++++++++data:+JSON.stringify({+items:+items+}),

+++++++++++++++++++++++//data:++JSON.stringify("{DocKey+:+'"+%2B+DocKey+%2B+"',highlightText:+'"+%2B++JSON.stringify(text)+%2B+"',pageNo:+'"+%2B+pgNo+%2B+"',left:+'"+%2B+left+%2B+"',top:+'"+%2B+top+%2B+"',width:+'"+%2B+width+%2B+"',height:+'"+%2B+height+%2B+"'}"),

+++++++++++++++++++++++//data:+"{DocKey\":\""%2B+DocKey%2B"\",\"highlightText\":\""%2B+text+%2B"\",\"pageNo\":\""%2BpgNo%2B"\",\"left\":\""%2Bleft%2B"\",\"top\":\""%2Btop%2B",\"width\":\""%2Bwidth%2B"\",\"height\":\""%2B+height+%2B"}}",
+++++++++++++++++++++++//+data:+"{DocKey+:+'"+%2B+DocKey+%2B+"',highlightText:+'"+%2B+text+%2B+"',pageNo:+'"+%2B+pgNo+%2B+"',left:+'"+%2B+left+%2B+"',top:+'"+%2B+top+%2B+"',width:+'"+%2B+width+%2B+"',height:+'"+%2B+height+%2B+"'}",
+++++++++++++++++++++++contentType:+"application/json;+charset=utf-8",
+++++++++++++++++++++++dataType:+"json",
+++++++++++++++++++++++beforeSend:+function+()+{
+++++++++++++++++++++++++++alert("Start!!!+");
+++++++++++++++++++++++},
+++++++++++++++++++++++success:+function+(data)+{
+++++++++++++++++++++++++++alert("Save+data+Successfully");
+++++++++++++++++++++++},
+++++++++++++++++++++++failure:+function+(msg)+{+alert("Sorry!!!+");+evt.obj.deleteObject();+},
+++++++++++++++++++++++async:+false

+++++++++++++++++++});|code-block|syntax|javascript|195837|背后的代码中的Web方法|195838|[WebMethod]+++++++
+public+static+string+SaveClient(object+items)+++++++{

++++List<object>+lstItems+=+new+++++JavaScriptSerializer().ConvertToType<List<object>>(items);

++Dictionary<string,+object>+dic+=+(Dictionary<string,+object>)lstItems[0];

++++}|195839|entityMap^0|5|A|0|0|7|5|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

Javascript at Client side

<pre><code> var items = [{ projectSoid: ProjectId, startDate: StartDate, endDate: EndDate, clientManager: ClientManager }];


 $.ajax({
 url: '"../Member/Home.aspx/SaveClient',
 type: "POST",
 data: JSON.stringify({ items: items }),

 //data: JSON.stringify("{DocKey : '" + DocKey + "',highlightText: '" + JSON.stringify(text) + "',pageNo: '" + pgNo + "',left: '" + left + "',top: '" + top + "',width: '" + width + "',height: '" + height + "'}"),

 //data: "{DocKey\":\""+ DocKey+"\",\"highlightText\":\""+ text +"\",\"pageNo\":\""+pgNo+"\",\"left\":\""+left+"\",\"top\":\""+top+",\"width\":\""+width+"\",\"height\":\""+ height +"}}",
 // data: "{DocKey : '" + DocKey + "',highlightText: '" + text + "',pageNo: '" + pgNo + "',left: '" + left + "',top: '" + top + "',width: '" + width + "',height: '" + height + "'}",
 contentType: "application/json; charset=utf-8",
 dataType: "json",
 beforeSend: function () {
 alert("Start!!! ");
 },
 success: function (data) {
 alert("Save data Successfully");
 },
 failure: function (msg) { alert("Sorry!!! "); evt.obj.deleteObject(); },
 async: false

 });
</code></pre>

Web Method at Code behind

<pre><code>[WebMethod] 
 public static string SaveClient(object items) {

 List&lt;object&gt; lstItems = new JavaScriptSerializer().ConvertToType&lt;List&lt;object&gt;&gt;(items);

 Dictionary&lt;string, object&gt; dic = (Dictionary&lt;string, object&gt;)lstItems[0];

 }
</code></pre>

I am using Data value as object literal, instead of concatenating a String as explained in <a href="https://stackoverflow.com/questions/15293091/sending-multiple-data-parameters-with-single-quote-with-jquery-ajax/15293209?noredirect=1#comment21581381_15293209">this answer</a>

My code is the following:

<pre><code>$.ajax({ 
 url: "../Member/Home.aspx/SaveClient",
 type: "POST",
 async: false,
 dataType: 'json',
 contentType: 'application/json; charset=utf-8',
 data: {
 "projectSoid": ProjectId,
 "startDate": StartDate,
 "endDate": EndDate,
 "clientManager": ClientManager
 },
 success: function(response) {
 if (response.d != "") {

 }
 },
 error: function(response) {
 var r = jQuery.parseJSON(response.responseText);
 alert("Message: " + r.Message);
 alert("StackTrace: " + r.StackTrace);
 alert("ExceptionType: " + r.ExceptionType);
 }
})
</code></pre>

and my webmethod is like this :

<pre><code>[WebMethod]
public static string SaveClient(string projectSoid, string startDate, 
 string endDate, string clientManager)
{
 ...
}
</code></pre>

But I get the following error:

<blockquote>
 Message: Invalid JSON primitive: projectSoid
</blockquote>

Message: Invalid JSON primitive: ajax jquery method with Webmethod

jQuery

JSON

我使用数据值作为对象字面量，而不是像中解释的那样连接字符串我的代码如下：$.ajax({      url: "../Member/Home.aspx/SaveClient",  type: "POST",  async: false,  dataType: 'json',  contentType: 'applica...

问消息:无效的JSON原语:带有Webmethod的ajax jquery方法
EN

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