序列化类型为“System.Reflection.RuntimeModule”的对象时检测到循环引用。
纪辰沛
“/”应用程序中的服务器错误。
序列化类型为“System.Reflection.RuntimeModule”的对象时检测到循环引用。
说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。异常详细信息: System.InvalidOperationException: 序列化类型为“System.Reflection.RuntimeModule”的对象时检测到循环引用。
源错误:
执行当前 Web 请求期间生成了未经处理的异常。可以使用下面的异常堆栈跟踪信息确定有关异常原因和发生位置的信息。
解决方案一
原理非常简单，主要思想就是利用Dictionary<string, object>字典，将DataRow属性名/值存储在List<Dictionary<string, object>>中，这样List<T>是能被正常序列化的。
转自：飞天心宏的博客 http://xuzhihong1987.blog.163.com/blog/static/26731587201101913722238/
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
namespace BMa.Web.APIS.Tools
{
/// <summary>
/// Description: 将DataTable转换JSON对象
/// </summary>
public class ConventDataTableToJson
{
/// <summary>
/// 序列化方法（带分页）
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string Serialize(DataTable dt)
{
List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
foreach (DataRow dr in dt.Rows)
{
Dictionary<string, object> result = new Dictionary<string, object>();
foreach (DataColumn dc in dt.Columns)
{
result.Add(dc.ColumnName, dr[dc].ToString());
}
list.Add(result);
}
int count = 0;
try
{
count = Convert.ToInt32(dt.TableName);
}
catch (System.Exception ex)
{
count = dt.Rows.Count;
}
string strReturn = "";
if (count == 0)
{
strReturn = "{\"totalCount\":0,\"data\":[]}";
}
else
{
strReturn = ConventToJson(list, count);
}
return strReturn;
}
/// <summary>
/// 转换为JSON对象
/// </summary>
/// <returns></returns>
public static string ConventToJson<T>(List<T> list, int count)
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
string strJson = serializer.Serialize(list);
strJson = strJson.Substring(1);
strJson = strJson.Insert(0, "{totalCount:" + count + ",data:[");
strJson += "}";
return strJson;
}
/// <summary>
/// 不需要分页
/// </summary>
/// <param name="dt"></param>
/// <param name="flag">false</param>
/// <returns></returns>
public static string Serialize(DataTable dt, bool flag)
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
foreach (DataRow dr in dt.Rows)
{
Dictionary<string, object> result = new Dictionary<string, object>();
foreach (DataColumn dc in dt.Columns)
{
result.Add(dc.ColumnName, dr[dc].ToString());
}
list.Add(result);
}
return serializer.Serialize(list);
}
}
}使用
using Newtonsoft.Json; //引用string listJson = ConventDataTableToJson.Serialize(dataTable, false);//返回json
List<Model> modelList = JsonConvert.DeserializeObject<List<Model>>(listJson);//反序列化
解决方案二（作者没有试）
转载于:https://www.cnblogs.com/lczblog/p/3310240.html
using System.Text; //引入public static string CreateJsonParameters(DataTable dt)
{
/**//**/
/**//* /****************************************************************************
* Without goingin to the depth of the functioning of this Method, i will try to give an overview
* As soon as this method gets a DataTable it starts to convert it into JSON String,
* it takes each row and in each row it grabs the cell name and its data.
* This kind of JSON is very usefull when developer have to have Column name of the .
* Values Can be Access on clien in this way. OBJ.HEAD[0].<ColumnName>
* NOTE: One negative point. by this method user will not be able to call any cell by its index.
* *************************************************************************/
StringBuilder JsonString = new StringBuilder();
//Exception Handling
if (dt != null && dt.Rows.Count > 0)
{
JsonString.Append("{ ");
JsonString.Append("\"T_blog\":[ ");
for (int i = 0; i < dt.Rows.Count; i++)
{
JsonString.Append("{ ");
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j < dt.Columns.Count - 1)
{
JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\",");
}
else if (j == dt.Columns.Count - 1)
{
JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\"");
}
}
/**//**/
/**//*end Of String*/
if (i == dt.Rows.Count - 1)
{
JsonString.Append("} ");
}
else
{
JsonString.Append("}, ");
}
}
JsonString.Append("]}");
return JsonString.ToString();
}
else
{
return null;
}
}效果是完全相同的。
页面前段把使用js解析json
function strToJson(str) {
var json = eval('(' + str + ')');
return json;
}但是不知道为什么 使用jquery的 $.parseJSON()方法解析总是出错 jquery的版本是4.1和9.1的 其它版本没有试 暂时还未找到原因！
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