解决办法 ：
Description: 将DataTable转换JSON对象
*
*/
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); ;
}
}
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。
以上转自：飞天心宏的博客 http://xuzhihong1987.blog.163.com/blog/static/26731587201101913722238/
另一种比较普通的方法：
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！