标签：blog http color io os ar strong for 数据
public class DataTableConvertJson
{
#region dataTable转换成Json格式
/// <summary>
/// dataTable转换成Json格式
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string DataTable2Json(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.Append("{\"");
jsonBuilder.Append(dt.TableName);
jsonBuilder.Append("\":[");
jsonBuilder.Append("[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("]");
jsonBuilder.Append("}");
return jsonBuilder.ToString();
}
#endregion dataTable转换成Json格式
#region DataSet转换成Json格式
/// <summary>
/// DataSet转换成Json格式
/// </summary>
/// <param name="ds">DataSet</param>
/// <returns></returns>
public static string Dataset2Json(DataSet ds)
{
StringBuilder json = new StringBuilder();
foreach (DataTable dt in ds.Tables)
{
json.Append("{\"");
json.Append(dt.TableName);
json.Append("\":");
json.Append(DataTable2Json(dt));
json.Append("}");
} return json.ToString();
}
#endregion
/// <summary>
/// Msdn
/// </summary>
/// <param name="jsonName"></param>
/// <param name="dt"></param>
/// <returns></returns>
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();
}
}
方法一：
public static string GetJSON(DataTable dt) { StringBuilder sb = new StringBuilder(); sb.Append("{\"totalCount\":" + dt.Rows.Count + ",\"data\":"); sb.Append("["); try { if (dt.Rows.Count > 0) { Hashtable ht = new Hashtable(); for (int i = 0; i < dt.Columns.Count; i++) { ht.Add(i, dt.Columns[i].ColumnName); } for (int i = 0; i < dt.Rows.Count; i++) { sb.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { sb.Append(string.Format("\"{0}\":\"{1}\",", ht[j], dt.Rows[i][j].ToString())); } sb.Remove(sb.ToString().LastIndexOf(","), 1); sb.Append("},"); } sb.Remove(sb.ToString().LastIndexOf(","), 1); ht.Clear(); ht = null; } } catch (Exception ex) { throw new Exception(ex.Message); } finally { sb.Append("]}"); } return sb.ToString();} |
方法二：用Newtonsoft.Json.Net20.dll（点击下载）
先添加 Newtonsoft.Json.Net20.dll 的引用
using System.Data;using System.IO;using Newtonsoft.Json;/// <summary>将DateTable转为Json格式数据</summary>/// <param name="dt">要转换的DataTable名称</param>/// <param name="dtName">应该是转换后的Key如用Json.dtName得到数据</param>/// <returns></returns>public static string DataTableToJSON(DataTable dt, string dtName){ StringBuilder sb = new StringBuilder(); StringWriter sw = new StringWriter(sb); using (JsonWriter jw = new JsonTextWriter(sw)) { JsonSerializer ser = new JsonSerializer(); jw.WriteStartObject(); jw.WritePropertyName(dtName); jw.WriteStartArray(); foreach (DataRow dr in dt.Rows) { jw.WriteStartObject(); foreach (DataColumn dc in dt.Columns) { jw.WritePropertyName(dc.ColumnName); ser.Serialize(jw, dr[dc].ToString()); } jw.WriteEndObject(); } jw.WriteEndArray(); jw.WriteEndObject(); sw.Close(); jw.Close(); } return sb.ToString();}
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标签：blog http color io os ar strong for 数据
原文地址：http://www.cnblogs.com/lschenblog/p/3973017.html
