json的转换
using System;
using System.Collections.Generic;
using
System.Text;
using System.Data;
using System.Reflection;
using
System.Collections;
using System.Data.Common;
namespace
DGMS.Common
{
//JSON转换类
public
class ConvertJson
{
#region
私有方法
///
<summary>
///
过滤特殊字符
///
</summary>
private static
string String2Json(String s)
{
StringBuilder sb = new
StringBuilder();
for (int i = 0; i < s.Length;
i++)
{
char c =
s.ToCharArray()[i];
switch
(c)
{
case
‘\"‘:
sb.Append("\\\"");
break;
case
‘\\‘:
sb.Append("\\\\");
break;
case
‘/‘:
sb.Append("\\/");
break;
case
‘\b‘:
sb.Append("\\b");
break;
case
‘\f‘:
sb.Append("\\f");
break;
case
‘\n‘:
sb.Append("\\n");
break;
case
‘\r‘:
sb.Append("\\r");
break;
case
‘\t‘:
sb.Append("\\t");
break;
default:
sb.Append(c);
break;
}
}
return
sb.ToString();
}
///
<summary>
///
格式化字符型、日期型、布尔型
///
</summary>
private static
string StringFormat(string str, Type
type)
{
if (type
==
typeof(string))
{
str =
String2Json(str);
str = "\"" + str +
"\"";
}
else if
(type ==
typeof(DateTime))
{
str = "\"" + str +
"\"";
}
else if
(type ==
typeof(bool))
{
str =
str.ToLower();
}
else if
(type != typeof(string) &&
string.IsNullOrEmpty(str))
{
str = "\"" + str +
"\"";
}
return
str;
}
#endregion
#region
List转换成Json
///
<summary>
///
List转换成Json
///
</summary>
public static
string ListToJson<T>(IList<T>
list)
{
object
obj =
list[0];
return ListToJson<T>(list,
obj.GetType().Name);
}
///
<summary>
/// List转换成Json
///
</summary>
public static
string ListToJson<T>(IList<T> list, string
jsonName)
{
StringBuilder Json = new
StringBuilder();
if (string.IsNullOrEmpty(jsonName)) jsonName =
list[0].GetType().Name;
Json.Append("{\"" + jsonName +
"\":[");
if (list.Count >
0)
{
for (int i = 0; i < list.Count;
i++)
{
T obj =
Activator.CreateInstance<T>();
PropertyInfo[] pi =
obj.GetType().GetProperties();
Json.Append("{");
for (int j = 0; j < pi.Length;
j++)
{
Type type = pi[j].GetValue(list[i],
null).GetType();
Json.Append("\"" + pi[j].Name.ToString() + "\":" +
StringFormat(pi[j].GetValue(list[i], null).ToString(),
type));
if (j < pi.Length -
1)
{
Json.Append(",");
}
}
Json.Append("}");
if (i < list.Count -
1)
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
}
#endregion
#region
对象转换为Json
/// <summary>
/// 对象转换为Json
/// </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 +
",";
}
jsonString.Remove(jsonString.Length - 1,
jsonString.Length);
return jsonString + "}";
}
#endregion
#region
对象集合转换Json
/// <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 += ToJson(item) +
",";
}
jsonString.Remove(jsonString.Length - 1,
jsonString.Length);
return jsonString + "]";
}
#endregion
#region
普通集合转换Json
/// <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()) +
",";
}
jsonString.Remove(jsonString.Length - 1,
jsonString.Length);
return jsonString + "]";
}
#endregion
#region
DataSet转换为Json
/// <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 += "\"" + table.TableName + "\":" + ToJson(table) +
",";
}
jsonString =
jsonString.TrimEnd(‘,‘);
return jsonString + "}";
}
#endregion
#region
Datatable转换为Json
///
<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 dt)
{
StringBuilder jsonString = new
StringBuilder();
jsonString.Append("[");
DataRowCollection drc =
dt.Rows;
for (int i = 0; i < drc.Count;
i++)
{
jsonString.Append("{");
for (int j = 0; j < dt.Columns.Count;
j++)
{
string strKey =
dt.Columns[j].ColumnName;
string strValue =
drc[i][j].ToString();
Type type =
dt.Columns[j].DataType;
jsonString.Append("\"" + strKey +
"\":");
strValue = StringFormat(strValue,
type);
if (j < dt.Columns.Count -
1)
{
jsonString.Append(strValue +
",");
}
else
{
jsonString.Append(strValue);
}
}
jsonString.Append("},");
}
if
(drc.Count !=
0)
{
jsonString.Remove(jsonString.Length - 1,
1);
}
jsonString.Append("]");
return jsonString.ToString();
}
public static string
ToJson(DataTable dt,int count)
{
StringBuilder jsonString = new
StringBuilder();
jsonString.Append("[");
DataRowCollection drc =
dt.Rows;
for (int i = 0; i < drc.Count;
i++)
{
jsonString.Append("{");
for (int j = 0; j < dt.Columns.Count;
j++)
{
string strKey =
dt.Columns[j].ColumnName;
string strValue =
drc[i][j].ToString();
Type type =
dt.Columns[j].DataType;
jsonString.Append("\"" + strKey +
"\":");
strValue = StringFormat(strValue,
type);
if (j < dt.Columns.Count -
1)
{
jsonString.Append(strValue +
",");
}
else
{
jsonString.Append(strValue);
}
}
jsonString.Append("},");
}
if
(drc.Count !=
0)
{
jsonString.Remove(jsonString.Length - 1,
1);
}
jsonString.Append("]");
return "{\"Total\":" + count + ",\"Rows\":" + jsonString.ToString() +
"}";
}
///
<summary>
///
DataTable转换为Json
///
</summary>
public static
string ToJson(DataTable dt, string
jsonName)
{
StringBuilder Json = new
StringBuilder();
if (string.IsNullOrEmpty(jsonName)) jsonName =
dt.TableName;
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++)
{
Type type =
dt.Rows[i][j].GetType();
Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" +
StringFormat(dt.Rows[i][j].ToString(),
type));
if (j < dt.Columns.Count -
1)
{
Json.Append(",");
}
}
Json.Append("}");
if (i < dt.Rows.Count -
1)
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
}
#endregion
#region
DataReader转换为Json
///
<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)
{
StringBuilder jsonString = new
StringBuilder();
jsonString.Append("[");
while
(dataReader.Read())
{
jsonString.Append("{");
for (int i = 0; i < dataReader.FieldCount;
i++)
{
Type type =
dataReader.GetFieldType(i);
string strKey =
dataReader.GetName(i);
string strValue =
dataReader[i].ToString();
jsonString.Append("\"" + strKey +
"\":");
strValue = StringFormat(strValue,
type);
if (i < dataReader.FieldCount -
1)
{
jsonString.Append(strValue +
",");
}
else
{
jsonString.Append(strValue);
}
}
jsonString.Append("},");
}
dataReader.Close();
jsonString.Remove(jsonString.Length - 1,
1);
jsonString.Append("]");
return jsonString.ToString();
}
#endregion
}
}
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