dataTable/dataSet转换成Json格式

using System.Text;
using System.Collections.Generic;

 

public static string DataTable2Json(DataTable dt)

    {

        StringBuilder jsonBuilder = new StringBuilder();

        jsonBuilder.Append("{\"");

        jsonBuilder.Append(dt.TableName.ToString());

        jsonBuilder.Append("\":[");

        List<string> si = new List<string>();

        for (int i = 0; i < dt.Rows.Count; i++)

        {

            StringBuilder sb = new StringBuilder();

            sb.Append("{");

            List<string> sf = new List<string>();



            for (int j = 0; j < dt.Columns.Count; j++)

            {

                StringBuilder fb = new StringBuilder();



                fb.Append("'");

                fb.Append(dt.Columns[j].ColumnName.Replace("'", "''"));

                fb.Append("':");

                if (dt.Rows[i][j] != null)

                {

                    string str = dt.Rows[i][j].ToString().Replace("'", "''");

                    str = str.Replace("\n", "\\n");

                    fb.AppendFormat("\'{0}\'", str);

                }

                else

                {

                    fb.Append("null");

                }



                sf.Add(fb.ToString());

            }

            sb.Append(string.Join(",", sf.ToArray()));

            sb.Append("}");

            si.Add(sb.ToString());

        }

        jsonBuilder.Append(string.Join(",", si.ToArray()));

        jsonBuilder.Append("]");

        jsonBuilder.Append("}");

        return jsonBuilder.ToString();

    }

 

public static string Dataset2Json(DataSet ds)

    {

        List<string> l = new List<string>();

        foreach (DataTable dt in ds.Tables)

        {

            StringBuilder si = new StringBuilder();

            si.Append("\"");

            si.Append(dt.TableName);

            si.Append("\":");

            si.Append(DataTable2Json(dt));

            l.Add(si.ToString());

        }



        StringBuilder json = new StringBuilder();

        json.Append("{");

        json.Append(string.Join(",", l.ToArray()));

        json.Append("}");

        return json.ToString();

    }

 

JS取值

var txt = eval("("+window.event.returnValue+")");

var value1 = txt[tableName][0]["value1"];

var value2 = txt[tableName][0]["value2"];