ASP.NET MVC Json()处理大数据异常解决方法，字符串的长度超过了为 maxJsonLength

问题：

使用 JSON JavaScriptSerializer 进行序列化或反序列化时出错。字符串的长度超过了为 maxJsonLength 属性设置的值。

<system.web.extensions>
    <scripting>
        <webServices>
            <jsonSerialization maxJsonLength="1024000000" />
        </webServices>
    </scripting>
</system.web.extensions>

这个方法测试了没有效果。

stackoverflow上找到答案

public ContentResult GetOrderList()
        {
            try
            {
                IList<OrderAll> list = new List<OrderAll>();

return new ContentResult { Content = new JavaScriptSerializer { MaxJsonLength = Int32.MaxValue }.Serialize(UnifyResponse.ReturnFun(list)), ContentType = "application/json"

                };

                //return this.Json(UnifyResponse.ReturnFun(list));
            }
            catch (Exception ex)
            {
                return new ContentResult
                {

                    Content = new JavaScriptSerializer { MaxJsonLength = Int32.MaxValue }.Serialize(UnifyResponse.ThrowError(ex)),
                    ContentType = "application/json"
                };
                //return this.Json(UnifyResponse.ThrowError(ex));
            }
        }