一个datatable转为json的函数

 public 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;
        }
    }

转换数据后的形式类似于：

 

{ Head:[ { ID:"80246",EmployeeNameCn:"张三"}, { ID:"80250",EmployeeNameCn:"李四"}, { ID:"80309",EmployeeNameCn:"王五"}, { ID:"80360",EmployeeNameCn:"赵六"}]}