在工作中我们经常会遇到格式转换的问题，有的时候是将JSON转换成DataTable、DataSet或是List等，也有可能将DataTable、DataSet或是List转换成JSON的，抽了点时间把这些方法整合了一下，希望对大家有所帮助，如果有什么问题请指出来，共同探讨。
代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Data;
using System.Data.Common;
using System.Collections;
using System.Reflection; namespace BJYX.WEB.Public
{
public class Creat_Json
{
public Creat_Json()
{
//
// TODO: 在此处添加构造函数逻辑
//
} public static string DataTable2Json(System.Data.DataTable dt)
{
System.Text.StringBuilder jsonBuilder = new System.Text.StringBuilder();
jsonBuilder.Append("{");
jsonBuilder.AppendFormat("\"total\":{0}, ", dt.Rows.Count);
jsonBuilder.Append("\"rows\":[ ");
for (int i = ; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = ; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """));
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - , );
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - , );
jsonBuilder.Append("]");
jsonBuilder.Append("}");
return jsonBuilder.ToString();
}
public static string DataTable2Json(System.Data.DataTable dt, int count)
{
System.Text.StringBuilder jsonBuilder = new System.Text.StringBuilder();
jsonBuilder.Append("{");
jsonBuilder.AppendFormat("\"total\":{0}, ", count);
jsonBuilder.Append("\"rows\":[ ");
for (int i = ; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = ; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """));
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - , );
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - , );
jsonBuilder.Append("]");
jsonBuilder.Append("}");
return jsonBuilder.ToString();
}
public static string DataTableToJson(System.Data.DataTable dt)
{
StringBuilder Json = new StringBuilder();
Json.Append("[");
if (dt.Rows.Count > )
{
for (int i = ; i < dt.Rows.Count; i++)
{
Json.Append("{");
for (int j = ; j < dt.Columns.Count; j++)
{
Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """) + "\"");
if (j < dt.Columns.Count - )
{
Json.Append(",");
}
}
Json.Append("}");
if (i < dt.Rows.Count - )
{
Json.Append(",");
}
}
}
Json.Append("]");
return Json.ToString().Replace("\\", "\\\\").Replace("\'", "\\\'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>");//.Replace("\"", "'"); ;
} /// <summary>
/// Table to JSON By FlexGrid
/// </summary>
/// <param name="ds"></param>
/// <param name="page"></param>
/// <returns></returns>
public static string DataTableToJson(System.Data.DataTable dt, int page, int total)
{
StringBuilder jsonStr = new StringBuilder();
jsonStr.Append("{");
jsonStr.Append("\"page\":" + page + ",");
jsonStr.Append("\"total\":" + total + ",");
jsonStr.Append("\"rows\":");
jsonStr.Append("["); foreach (System.Data.DataRow dr in dt.Rows)
{
jsonStr.Append("{"); foreach (System.Data.DataColumn dc in dt.Columns)
{
jsonStr.Append("\"");
jsonStr.Append(dc.ColumnName);
jsonStr.Append("\"");
jsonStr.Append(":"); jsonStr.Append("\"");
jsonStr.Append(dr[dc].ToString().Trim());
jsonStr.Append("\" ,");
} jsonStr.Remove(jsonStr.Length - , );
jsonStr.Append("}");
jsonStr.Append(",");
}
if (dt.Rows.Count > )
{
jsonStr.Remove(jsonStr.Length - , );
}
jsonStr.Append("]");
jsonStr.Append("}"); return jsonStr.ToString();
} /// <summary>
/// List转成json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonName"></param>
/// <param name="list"></param>
/// <returns></returns>
public static string ListToJson<T>(IList<T> list, string jsonName)
{
StringBuilder Json = new StringBuilder();
if (string.IsNullOrEmpty(jsonName))
jsonName = list[].GetType().Name;
Json.Append("{\"" + jsonName + "\":[");
if (list.Count > )
{
for (int i = ; i < list.Count; i++)
{
T obj = Activator.CreateInstance<T>();
PropertyInfo[] pi = obj.GetType().GetProperties();
Json.Append("{");
for (int j = ; 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 - )
{
Json.Append(",");
}
}
Json.Append("}");
if (i < list.Count - )
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
} /// <summary>
/// List转成json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <returns></returns>
public static string ListToJson<T>(IList<T> list)
{
object obj = list[];
return ListToJson<T>(list, obj.GetType().Name);
} /// <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 = ; 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 - , jsonString.Length);
return 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 += ToJson(item) + ",";
}
jsonString.Remove(jsonString.Length - , jsonString.Length);
return 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()) + ",";
}
jsonString.Remove(jsonString.Length - , jsonString.Length);
return jsonString + "]";
} /// <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 = ; i < drc.Count; i++)
{
jsonString.Append("{");
for (int j = ; 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 - )
{
jsonString.Append(strValue + ",");
}
else
{
jsonString.Append(strValue);
}
}
jsonString.Append("},");
}
jsonString.Remove(jsonString.Length - , );
jsonString.Append("]");
return jsonString.ToString();
} /// <summary>
/// DataTable转成Json
/// </summary>
/// <param name="jsonName"></param>
/// <param name="dt"></param>
/// <returns></returns>
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 > )
{
for (int i = ; i < dt.Rows.Count; i++)
{
Json.Append("{");
for (int j = ; 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 - )
{
Json.Append(",");
}
}
Json.Append("}");
if (i < dt.Rows.Count - )
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
} /// <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 = ; 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 - )
{
jsonString.Append(strValue + ",");
}
else
{
jsonString.Append(strValue);
}
}
jsonString.Append("},");
}
dataReader.Close();
jsonString.Remove(jsonString.Length - , );
jsonString.Append("]");
return jsonString.ToString();
}
/// <summary>
/// 将IList转成JSON
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonName"></param>
/// <param name="IL"></param>
/// <returns></returns>
public static string ObjectToJson<T>(IList<T> IL)
{
StringBuilder Json = new StringBuilder();
Json.Append("[");
if (IL.Count > )
{
for (int i = ; i < IL.Count; i++)
{
T obj = Activator.CreateInstance<T>();
Type type = obj.GetType();
PropertyInfo[] pis = type.GetProperties();
Json.Append("{");
for (int j = ; j < pis.Length; j++)
{
Json.Append("\"" + pis[j].Name.ToString() + "\":\"" + pis[j].GetValue(IL[i], null) + "\"");
if (j < pis.Length - )
{
Json.Append(",");
}
}
Json.Append("}");
if (i < IL.Count - )
{
Json.Append(",");
}
}
}
Json.Append("]");
return Json.ToString();
} /// <summary>
/// 将IList转成符合FlexiGrid控件格式的JSON
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="IL"></param>
/// <param name="page">但前页</param>
/// <param name="total">数据行数</param>
/// <returns></returns>
public static string ListToFlexiGridJson<T>(IList<T> IL, int page, int total)
{
StringBuilder Json = new StringBuilder();
Json.Append("{");
Json.Append("\"page\":" + page + ",");
Json.Append("\"total\":" + total + ",");
Json.Append("\"rows\":");
Json.Append("["); if (IL.Count > )
{
for (int i = ; i < IL.Count; i++)
{
T obj = Activator.CreateInstance<T>();
Type type = obj.GetType();
PropertyInfo[] pis = type.GetProperties();
Json.Append("{");
for (int j = ; j < pis.Length; j++)
{
Json.Append("\"" + pis[j].Name.ToString() + "\":\"" + pis[j].GetValue(IL[i], null) + "\"");
if (j < pis.Length - )
{
Json.Append(",");
}
}
Json.Append("}");
if (i < IL.Count - )
{
Json.Append(",");
}
}
}
Json.Append("]");
Json.Append("}");
return Json.ToString();
} /// <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 + "}";
} /// <summary>
/// 过滤特殊字符
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private static string String2Json(String s)
{
StringBuilder sb = new StringBuilder();
for (int i = ; 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>
/// <param name="str"></param>
/// <param name="type"></param>
/// <returns></returns>
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();
}
return str;
} }
}