json序列化數據超出最大值(maxJsonLength)

1、序列化：

以下代碼在對象過大時會報錯：進行序列化或反序列化時出錯。字符串的長度超過了為 maxJsonLength 屬性設置的值。

//jsonObj比較大的時候會報錯
var serializer = new JavaScriptSerializer();
return serializer.Serialize(jsonObj);

使用Newtonsoft.Json也有此問題，解決方案是設置MaxJsonLength：

var serializer = new JavaScriptSerializer();
serializer.MaxJsonLength = Int32.MaxValue; //設置為int的最大值
return serializer.Serialize(jsonObj);

2、ajax訪問WebService：

以jQuery方式訪問WebService，如果POST的數據過大，也會收到HTTP500錯誤，解決方法是在Web.config中設置一下maxJsonLength：

<system.web.extensions>
<scripting>
<webServices>
<!--單位為字節-->
<jsonSerializationmaxJsonLength="1024000"/>
</webServices>
</scripting>
</system.web.extensions>

//訪問調用方法

 JavaScriptSerializer serializer = new JavaScriptSerializer();
32 
33                 ScriptingJsonSerializationSection section = ConfigurationManager.GetSection("system.web.extensions/scripting/webServices/jsonSerialization") as ScriptingJsonSerializationSection;
34            
35                 if (section != null)
36                 {
37                     serializer.MaxJsonLength = section.MaxJsonLength;
38                     serializer.RecursionLimit = section.RecursionLimit;
39                 }