Check the url,
http://stackoverflow.com/questions/451460/datatable-to-json[
^]
http://james.newtonking.com/pages/json-net.aspx[
^]
The basic idea behind this is,
1. Get all datatable objects from dataset in webservice
2. Get the JSOn string for each datatable
3. Or you can get the data into Dictionary<string,>
Here is a code to convery to JSON string
public static string GetJSONString(DataTable Dt)
{
string[] StrDc = new string[Dt.Columns.Count];
string HeadStr = string.Empty;
for (int i = 0; i < Dt.Columns.Count; i++)
{
StrDc[i] = Dt.Columns[i].Caption;
HeadStr += "\"" + StrDc[i] + "\" : \"" + StrDc[i] + i.ToString() + "¾" + "\",";
}
HeadStr = HeadStr.Substring(0, HeadStr.Length - 1);
StringBuilder Sb = new StringBuilder();
Sb.Append("{\"" + Dt.TableName + "\" : [");
for (int i = 0; i < Dt.Rows.Count; i++)
{
string TempStr = HeadStr;
Sb.Append("{");
for (int j = 0; j < Dt.Columns.Count; j++)
{
TempStr = TempStr.Replace(Dt.Columns[j] + j.ToString() + "¾", Dt.Rows[i][j].ToString());
}
Sb.Append(TempStr + "},");
}
Hope this helps.
cheers