的WebMethod

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本文介绍了的WebMethod - JSON序列化错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我想提出一个jQuery AJAX调用在aspx.cs页后端的WebMethod。我收到的.NET JSON序列化的错误。因此，我在寻找各种方法来解决任何错误或避免使用JSON（为的WebMethods只返回格式）：

I am making a jQuery AJAX call to a back-end WebMethod in an aspx.cs page. I am getting an error in the .NET JSON serialization. As such, I am looking for ways to either fix the error or avoid using JSON (the only return format for WebMethods):

使用JSON JavaScriptSerializer序列化和反序列化过程中的错误。字符串的长度超过上maxJsonLength属性设置的值

相关联的堆栈跟踪是：在System.Web.Script.Serialization.JavaScriptSerializer.Serialize（obj对象，StringBuilder的输出，SerializationFormat serializationFormat）\ r \ n将在System.Web.Script.Services.RestHandler.InvokeMethod（HttpContext的背景下，WebServiceMethodData methodData ，IDictionary'2 rawParams）\ r \ n将在System.Web.Script.Services.RestHandler.ExecuteWebServiceCall（HttpContext的背景下，WebServiceMethodData methodData）

The associated StackTrace is : at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)\r\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary'2 rawParams)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)

后端code是如下（注：结果是，在现实中大概呈现为一个字符串控制的110K）：

The backend code is as follows (note: result is, in actuality about 110k of a control rendered to a string):

[WebMethod] public static string GetContactListControl() { try { var result = "Hello World!" return result; } catch (Exception e){ Logging.LogException(e); return "Exception Thrown"; } }

和我从来没有碰到抓块，这对我表明，这个问题是我的code之外。

And I am never hitting the catch block, which to me shows that this issue is outside of my code.

我发现涉及改变web.config中插入以下块的修复程序，但它不工作：

I found a fix involving changing the web.config by inserting the following block, but it is not working:

<system.web.extensions> <scripting> <webServices> <jsonSerialization maxJsonLength="123456"></jsonSerialization> </webServices> </scripting> </system.web.extensions>

Project是.NET 3.5。

Project is .NET 3.5.

感谢您的任何意见和建议！

Thank you for any ideas and suggestions!

推荐答案

在maxJsonLength财产的配置必须设置在web.config中。为了让被IIS允许这种配置，下面＆LT; sectionGroup＆GT; 必须包含的＆LT内部; configSections＆GT; ：

Configuration of the maxJsonLength property must be setup in the web.config. In order to allow this configuration to be permitted by IIS, the following <sectionGroup> must be included inside of <configSections>:

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