jquery json asp.net 将各种对象:list ..等转换成

publicvoid ProcessRequest(HttpContext context)

    {

        context.Response.ContentType ="text/plain";

        DataTable data2 = myData();



        string str = DataTableToJson("myJson", data2);//构建的json数据



        context.Response.Write(str);

    }



    publicbool IsReusable

    {

        get

        {

            returnfalse;

        }

    }





    //用datatable做数据,数据模拟

    public DataTable myData()

    {

        DataTable dt =new DataTable();

        DataColumn dc;

        DataRow dr;



        dc =new DataColumn("Name", System.Type.GetType("System.String"));

        dt.Columns.Add(dc);

        dc =new DataColumn("Email", System.Type.GetType("System.String"));

        dt.Columns.Add(dc);

        dc =new DataColumn("Phon", System.Type.GetType("System.String"));

        dt.Columns.Add(dc);

        dc =new DataColumn("Move", System.Type.GetType("System.String"));

        dt.Columns.Add(dc);

        dc =new DataColumn("Pan", System.Type.GetType("System.String"));

        dt.Columns.Add(dc);

        dc =new DataColumn("select", System.Type.GetType("System.String"));

        dt.Columns.Add(dc);

        for (int i =1; i <7; i++)

        {

            dr = dt.NewRow();

            dr["Name"] ="Name"+ i.ToString();

            dr["Email"] ="Email"+ i.ToString();

            dr["Phon"] ="Phon"+ i.ToString();

            dr["Move"] ="Move"+ i.ToString();

            dr["Pan"] ="Pan"+ i.ToString();

            dr["select"] = i.ToString();

            dt.Rows.Add(dr);

        }



        int count = dt.Rows.Count;

        return dt;

    }



    //将datatable数据转换成JSON数据

    publicstring DataTableToJson(string jsonName, DataTable dt)

    {

        StringBuilder Json =new StringBuilder();

        Json.Append("[");

        if (dt.Rows.Count >0)

        {

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

            {

                Json.Append("{");

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

                {

                    Json.Append(dt.Columns[j].ColumnName.ToString() +":\""+ dt.Rows[i][j].ToString() +"\"");

                    if (j < dt.Columns.Count -1)

                    {

                        Json.Append(",");

                    }

                }

                Json.Append("}");

                if (i < dt.Rows.Count -1)

                {

                    Json.Append(",");

                }

            }

        }

        Json.Append("]");

        return Json.ToString();

    }



    //列表数据转换到json数据

    publicstring ObjectToJson<T>(string jsonName, IList<T> IL)

    {

        StringBuilder Json =new StringBuilder();

        Json.Append("[");

        if (IL.Count >0)

        {

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

            {

                T obj = Activator.CreateInstance<T>();

                Type type = obj.GetType();

                PropertyInfo[] pis = type.GetProperties();

                Json.Append("{");

                for (int j =0; j < pis.Length; j++)

                {

                    Json.Append(pis[j].Name.ToString() +":\""+ pis[j].GetValue(IL[i], null) +"\"");

                    if (j < pis.Length -1)

                    {

                        Json.Append(",");

                    }

                }

                Json.Append("}");

                if (i < IL.Count -1)

                {

                    Json.Append(",");

                }

            }

        }

        Json.Append("]");

        return Json.ToString();

    }

     页面Default.aspx

 

function GetData()
{
$.getJSON(
"JsonData.ashx",//产生Json数据的服务端页面
function(json)
{
for(var i=0;i<json.length;i++)
{
//开始
var index=-1;
var txtTRLastIndex = findObj("txtTRLastIndex",document);
var rowID = parseInt(txtTRLastIndex.value);
var signFrame = findObj("SignFrame",document);
//添加行
var newTR = signFrame.insertRow(signFrame.rows.length);
newTR.id ="SignItem"+ rowID;
//添加列:序号
var newNameTD=newTR.insertCell(0);
//添加列内容
newNameTD.innerHTML = newTR.rowIndex.toString();
//添加列:姓名
var newNameTD=newTR.insertCell(1);
//添加列内容
newNameTD.innerHTML ="<input name='txtName"+ rowID +"' id='txtName"+ rowID +"' value='"+json[i].Name+"' type='text' size='12' />";
//添加列:电子邮箱
var newEmailTD=newTR.insertCell(2);
//添加列内容
newEmailTD.innerHTML ="<input name='txtEMail"+ rowID +"' id='txtEmail"+ rowID +"' value='"+json[i].Email+"' type='text' size='20' />";
//添加列:电话
var newTelTD=newTR.insertCell(3);
//添加列内容
newTelTD.innerHTML ="<input name='txtTel"+ rowID +"' id='txtTel"+ rowID +"' value='"+json[i].Phon+"' type='text' size='10' />";
//添加列:手机
var newMobileTD=newTR.insertCell(4);
//添加列内容
newMobileTD.innerHTML ="<input name='txtMobile"+ rowID +"' id='txtMobile"+ rowID +"' value='"+json[i].Move+"' type='text' size='12' />";
//添加列:公司名
var newCompanyTD=newTR.insertCell(5);
//添加列内容
newCompanyTD.innerHTML ="<input name='txtCompany"+ rowID +"' id='txtCompany"+ rowID +"' value='"+json[i].Pan+"' type='text' size='20' />";

//添加下拉框
var newCompanyTD=newTR.insertCell(6);
newCompanyTD.innerHTML ="<select id='Select"+rowID+"'><option value='1'>1</option><option value='2'>2</option><option value='3'>3</option><option value='4'>4</option><option value='5'>5</option> </select>";

//动态选中下拉框
for(var j=0;j<document.getElementById("Select"+rowID).options.length;j++)
{
if(document.getElementById("Select"+rowID).options[j].text==json[i].select)
index=j;
}
if(index>=0)
document.getElementById("Select"+rowID).options[index].selected=true;


//添加列:删除按钮
var newDeleteTD=newTR.insertCell(7);
//添加列内容
newDeleteTD.innerHTML ="<div align='center' style='40px'><a href='javascript:;' onclick=\"DeleteSignRow('SignItem"+ rowID +"')\">删除</a></div>";
//将行号推进下一行
txtTRLastIndex.value = (rowID +1).toString();
}
}


)
}

 

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datatable与json的转化

1将DataTable或Ilist<>转换成JSON格式

 

using System;
using System.Data;
using System.Text;
using System.Collections.Generic;
using System.Reflection;

///<summary>
/// 将DataTable或Ilist<>转换成JSON格式
///</summary>
publicclass ToJson
{
public ToJson()
{

}

//DataTable转成Json
publicstaticstring DataTableToJson(string jsonName, DataTable dt)
{
StringBuilder Json =new StringBuilder();
Json.Append("{\""+ jsonName +"\":[");
if (dt.Rows.Count >0)
{
for (int i =0; i < dt.Rows.Count; i++)
{
Json.Append("{");
for (int j =0; j < dt.Columns.Count; j++)
{
Json.Append("\""+ dt.Columns[j].ColumnName.ToString() +"\":\""+ dt.Rows[i][j].ToString() +"\"");
if (j < dt.Columns.Count -1)
{
Json.Append(",");
}
}
Json.Append("}");
if (i < dt.Rows.Count -1)
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
}

//List转成json
publicstaticstring ObjectToJson<T>(string jsonName, IList<T> IL)
{
StringBuilder Json =new StringBuilder();
Json.Append("{\""+ jsonName +"\":[");
if (IL.Count >0)
{
for (int i =0; i < IL.Count; i++)
{
T obj = Activator.CreateInstance<T>();
Type type = obj.GetType();
PropertyInfo[] pis = type.GetProperties();
Json.Append("{");
for (int j =0; j < pis.Length; j++)
{
Json.Append("\""+ pis[j].Name.ToString() +"\":\""+ pis[j].GetValue(IL[i], null) +"\"");
if (j < pis.Length -1)
{
Json.Append(",");
}
}
Json.Append("}");
if (i < IL.Count -1)
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
}
}

2各种数据集转换为json
 

///<summary>
/// 对象转换为Json字符串
///</summary>
///<param name="jsonObject">对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToJson(object jsonObject)
{
string jsonString ="{";
PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
for (int i =0; i < propertyInfo.Length; i++)
{
object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
string value =string.Empty;
if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
{
value ="'"+ objectValue.ToString() +"'";
}
elseif(objectValue isstring)
{
value ="'"+ ToJson(objectValue.ToString()) +"'";
}
elseif (objectValue is IEnumerable)
{
value = ToJson((IEnumerable)objectValue);
}
else
{
value = ToJson(objectValue.ToString());
}
jsonString +="\""+ ToJson(propertyInfo[i].Name) +"\":"+ value +",";
}
return Json.DeleteLast(jsonString) +"}";
}
///<summary>
/// 对象集合转换Json
///</summary>
///<param name="array">集合对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToJson(IEnumerable array)
{
string jsonString ="[";
foreach (object item in array)
{
jsonString += Json.ToJson(item) +",";
}
return Json.DeleteLast(jsonString) +"]";
}
///<summary>
/// 普通集合转换Json
///</summary>
///<param name="array">集合对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToArrayString(IEnumerable array)
{
string jsonString ="[";
foreach (object item in array)
{
jsonString = ToJson(item.ToString()) +",";
}
return Json.DeleteLast(jsonString) +"]";
}
///<summary>
/// 删除结尾字符
///</summary>
///<param name="str">需要删除的字符</param>
///<returns>完成后的字符串</returns>
privatestaticstring DeleteLast(string str)
{
if (str.Length >1)
{
return str.Substring(0, str.Length -1);
}
return str;
}
///<summary>
/// Datatable转换为Json
///</summary>
///<param name="table">Datatable对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToJson(DataTable table)
{
string jsonString ="[";
DataRowCollection drc = table.Rows;
for (int i =0; i < drc.Count; i++)
{
jsonString +="{";
foreach (DataColumn column in table.Columns)
{
jsonString +="\""+ ToJson(column.ColumnName) +"\":";
if (column.DataType ==typeof(DateTime) || column.DataType ==typeof(string))
{
jsonString +="\""+ ToJson(drc[i][column.ColumnName].ToString()) +"\",";
}
else
{
jsonString += ToJson(drc[i][column.ColumnName].ToString()) +",";
}
}
jsonString = DeleteLast(jsonString) +"},";
}
return DeleteLast(jsonString) +"]";
}
///<summary>
/// DataReader转换为Json
///</summary>
///<param name="dataReader">DataReader对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToJson(DbDataReader dataReader)
{
string jsonString ="[";
while (dataReader.Read())
{
jsonString +="{";

for (int i =0; i < dataReader.FieldCount; i++)
{
jsonString +="\""+ ToJson(dataReader.GetName(i)) +"\":";
if (dataReader.GetFieldType(i) ==typeof(DateTime) || dataReader.GetFieldType(i) ==typeof(string))
{
jsonString +="\""+ ToJson(dataReader[i].ToString()) +"\",";
}
else
{
jsonString += ToJson(dataReader[i].ToString()) +",";
}
}
jsonString = DeleteLast(jsonString) +"}";
}
dataReader.Close();
return DeleteLast(jsonString) +"]";
}
///<summary>
/// DataSet转换为Json
///</summary>
///<param name="dataSet">DataSet对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToJson(DataSet dataSet)
{
string jsonString ="{";
foreach (DataTable table in dataSet.Tables)
{
jsonString +="\""+ ToJson(table.TableName) +"\":"+ ToJson(table) +",";
}
return jsonString = DeleteLast(jsonString) +"}";
}
///<summary>
/// String转换为Json
///</summary>
///<param name="value">String对象</param>
///<returns>Json字符串</returns>
publicstaticstring ToJson(string value)
{
if (string.IsNullOrEmpty(value))
{
returnstring.Empty;
}

string temstr;
temstr = value;
temstr = temstr.Replace("{", "｛").Replace("}", "｝").Replace(":", "：").Replace(",", "，").Replace("[", "【").Replace("]", "】").Replace(";", "；").Replace("\n", "<br/>").Replace("\r", "");

temstr = temstr.Replace("\t", "");
temstr = temstr.Replace("'", "\'");
temstr = temstr.Replace(@"\", @"\\");
temstr = temstr.Replace("\"", "\"\"");
return temstr;
}