JSON与DataTable(DataSet)相互转化
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DT->JSON 好用
public static string CreateJsonParameters(DataTable dt) { /* /**************************************************************************** * Without goingin to the depth of the functioning of this Method, i will try to give an overview * As soon as this method gets a DataTable it starts to convert it into JSON String, * it takes each row and in each row it grabs the cell name and its data. * This kind of JSON is very usefull when developer have to have Column name of the . * Values Can be Access on clien in this way. OBJ.HEAD[0].<ColumnName> * NOTE: One negative point. by this method user will not be able to call any cell by its index. * *************************************************************************/ StringBuilder JsonString = new StringBuilder(); //Exception Handling if (dt != null && dt.Rows.Count > 0) { JsonString.Append("{ "); JsonString.Append("\"Head\":[ "); for (int i = 0; i < dt.Rows.Count; i++) { JsonString.Append("{ "); for (int j = 0; j < dt.Columns.Count; j++) { if (j < dt.Columns.Count - 1) { JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\","); } else if (j == dt.Columns.Count - 1) { JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\""); } } /*end Of String*/ if (i == dt.Rows.Count - 1) { JsonString.Append("} "); } else { JsonString.Append("}, "); } } JsonString.Append("]}"); return JsonString.ToString(); } else { return null; } }
# 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 ToJson(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.Append("{/"");
jsonBuilder.Append(dt.TableName.ToString());
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 ToJson(DataSet ds)
{
StringBuilder json = new StringBuilder();
foreach (DataTable dt in ds.Tables)
{
json.Append("{/"");
json.Append(dt.TableName);
json.Append("/":");
json.Append(ToJson(dt));
json.Append("}");
}
return json.ToString();
}
# endregion
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;
//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(':');
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++)
{
dr[r] = strRows[r].Split(':')[1].Trim().Replace(",", ",").Replace(":", ":").Replace("/"", "");
}
tb.Rows.Add(dr);
tb.AcceptChanges();
}
return tb;
}
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