JSON與DataTable(DataSet)相互轉化
DT->JSON 好用
- publicstaticstring 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() + "\",");
- }
- elseif (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
- {
- returnnull;
- }
- }
# region dataTable轉換成Json格式
/// <summary>
/// dataTable轉換成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轉換成Json格式
# region DataSet轉換成Json格式
/// <summary>
/// DataSet轉換成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("]"));
//獲取資料
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(',');
//建立表
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();
}
//增加內容
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;
}