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[Solved] Error when serializing or deserializing with JSON JavaScriptSerializer

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Posted on 10/6/2020 9:02:49 PM | | |
Looking at the exception logs, I found that when the controller was serializing the JSON, the error was reported as follows:

server error 500: Message type: InvalidOperationException <br>Message content: Error when serializing or deserializing with JSON JavaScriptSerializer. The length of the string exceeds the value set for the maxJsonLength property. <br>Exception Throwing Exception Method: Void Serialize (System.Object, System.Text.StringBuilder, SerializationFormat) <br>Exception Object: System.Web.Extensions <br>Exception Directory: Tools, <br>Exception File: WatermarkPost
The error is caused by the string exceeding the default length when serializing the JSON.

Solution 1:



Solution 2:

Add the following node to the web.config <configuration>below



Solution 3:







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