Question

Why should I use JSON with ASP.NET? Can you give a practical example? I have read articles but not so good.

Answer 1

How about when returning data from a Web Service ? Here are two methods that are suitable for .Net 2.0, that take a DataTable or a DataRow Parameter, and return a JSON formatted string to be sent over to the client, from the web service:

public string GetJson(DataRow r)     {         int index = 0;         StringBuilder json = new StringBuilder();         foreach (DataColumn item in r.Table.Columns)         {             json.Append(String.Format('\'{0}\' : \'{1}\'', item.ColumnName, r[item.ColumnName].ToString().Replace('\'','\\\'')));             if (index < r.Table.Columns.Count - 1)             {                 json.Append(', ');             }             index++;         }         return '{' + json.ToString() + '}';     }  public string GetJson(DataTable t) {     int index = 0;     StringBuilder json = new StringBuilder();     foreach (DataRow currRow in t.Rows)     {         json.Append(GetJson(currRow));         if (index < t.Rows.Count - 1)         {             json.Append(', ');         }     }     return '[' + json.ToString() + ']'; } 

The result can then be sent and evaluated on the Client.