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  • (asp.net )DataTable与Json相互转化

    将Datatable转化为Json数据形式

    #region 方法[DataTableToJson]DataTable转化为Json形式
    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();
    }
    #endregion

    将Json的数据形式转化为Datatable

    #region 方法[JsonToDataTable]Json转化为Datatable形式
    public static DataTable JsonToDataTable(string strJson)
    {
    //取出表名
    Regex rg = new Regex(@"(?<={)[^:]+(?=:[)", RegexOptions.IgnoreCase);
    string strName = rg.Match(strJson).Value;
    DataTable tb = null;
    string Str_Head = "";

    //去除表名
    strJson = strJson.Substring(strJson.IndexOf("[") + 1);
    strJson = strJson.Substring(0, strJson.IndexOf("]"));

    //获取数据
    rg = new Regex(@"(?<={)[^}]+(?=})");
    MatchCollection mc = rg.Matches(strJson);
    for (int i = 0; i < mc.Count; i++)
    {
    string strRow = mc[i].Value;
    string[] strRows = strRow.Split(',');

    //创建表
    if (tb == null)
    {
    tb = new DataTable();
    tb.TableName = strName;
    foreach (string str in strRows)
    {
    DataColumn dc = new DataColumn();
    string[] strCell = str.Split(':');

    Str_Head = strCell[0].ToString().Substring(0, strCell[0].ToString().Length - 1);//去除最后一位字符串
    Str_Head = Str_Head.Substring(1);//去除第一位字符串
    dc.ColumnName = Str_Head;
    //dc.ColumnName = strCell[0].ToString();

    tb.Columns.Add(dc);
    }
    tb.AcceptChanges();
    }

    //增加内容
    DataRow dr = tb.NewRow();
    for (int r = 0; r < strRows.Length; r++)
    {
    //Str_Cell = strRows[r].Split(':')[1].Trim().Replace(",", ",").Replace(":", ":").Replace("/", "").Substring(0, strRows[1].ToString().Length - 1);
    //Str_Cell = Str_Cell.Substring(1);
    //dr[r] = Str_Cell;
    dr[r] = strRows[r].Split(':')[1].Trim().Replace(",", ",").Replace(":", ":").Replace("/", "");
    dr[r] = dr[r].ToString().Substring(0, Convert.ToString(dr[r]).Length - 1);//去除最后一位字符串
    dr[r] = Convert.ToString(dr[r]).Substring(1);//去除第一位字符串
    }
    tb.Rows.Add(dr);
    tb.AcceptChanges();
    }

    return tb;
    }
    #endregion

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  • 原文地址:https://www.cnblogs.com/JBlogs/p/3716511.html
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