jquery json asp.net 将各种对象:list ..等转换成

public void 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);

    }



    public bool IsReusable

    {

        get

        {

            return false ;

        }

    }





    // 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

    public string 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

    public string 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='width: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>
public class ToJson
{
public ToJson()
{

}

// DataTable转成Json
public static string 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
public static string 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>
public static string 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() + " ' " ;
}
else if (objectValue is string )
{
value = " ' " + ToJson(objectValue.ToString()) + " ' " ;
}
else if (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>
public static string 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>
public static string 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>
private static string 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>
public static string 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>
public static string 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>
public static string 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>
public static string ToJson( string value)
{
if ( string .IsNullOrEmpty(value))
{
return string .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;
}