DataTable转化为Json数组

 1   public static string DtToSON(DataTable dt)
 2         {
 3             StringBuilder jsonBuilder = new StringBuilder();
 4             jsonBuilder.Append("[");
 5             for (int i = 0; i < dt.Rows.Count; i++)
 6             {
 7                 jsonBuilder.Append("{");
 8                 for (int j = 0; j < dt.Columns.Count; j++)
 9                 {
10                     jsonBuilder.Append("\"");
11                     jsonBuilder.Append(dt.Columns[j].ColumnName);
12                     jsonBuilder.Append("\":\"");
13                     jsonBuilder.Append(dt.Rows[i][j].ToString());
14                     jsonBuilder.Append("\",");
15                 }
16                 jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
17                 jsonBuilder.Append("},");
18             }
19             jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
20             jsonBuilder.Append("]");
21             return jsonBuilder.ToString();
22         }