asp.net使用DataTable構(gòu)造Json字符串的方法

/// summary>
/// 將datatable轉(zhuǎn)換為json
/// /summary>
/// param name="dtb">/param>
/// returns>/returns>
private string Dtb2Json(DataTable dtb) {
  JavaScriptSerializer jss = new JavaScriptSerializer();
  System.Collections.ArrayList dic = new System.Collections.ArrayList();
  foreach (DataRow dr in dtb.Rows)
  {
   System.Collections.Generic.Dictionarystring, object> drow = new System.Collections.Generic.Dictionarystring, object>();
   foreach (DataColumn dc in dtb.Columns)
   {
    drow.Add(dc.ColumnName, dr[dc.ColumnName]);
   }
   dic.Add(drow);
  }
  //序列化
  return jss.Serialize(dic);
} /// summary>
/// 構(gòu)建JSON字符串
/// /summary>
/// param name="dt">/param>
/// returns>/returns>
public static string CreateJsonParameters(DataTable dt)
{
 System.Text.StringBuilder sb = new System.Text.StringBuilder();
 if (dt != null  dt.Rows.Count > 0)
 {
  sb.Append("[");
  for (int i = 0; i  dt.Rows.Count; i++)
  {
   sb.Append("{");
   for (int j = 0; j  dt.Columns.Count; j++)
   {
    //如果值不是最后一個(gè)則添加逗號(hào)分隔
    if (j  dt.Columns.Count - 1)
    {
     sb.Append("/"" + dt.Columns[j].ColumnName.ToString() + "/":" + "/"" + dt.Rows[i][j].ToString() + "/",");
    }
     //如果值為最后個(gè)字符則不添加逗號(hào)
    else if (j == dt.Columns.Count - 1)
    {
     sb.Append("/"" + dt.Columns[j].ColumnName.ToString() + "/":" + "/"" + dt.Rows[i][j].ToString() + "/"");
    }
   }
   //如果為最后一個(gè)值的話 則不添加逗號(hào)
   if (i == dt.Rows.Count - 1)
   {
    sb.Append("}");
   }
   else
   {
    sb.Append("},");
   }
  }
  sb.Append("]");
  return sb.ToString();
 }
 else { return null; }
}