本文實例講述了asp.net使用DataTable構造Json字符串的方法。，具體如下：

/// <summary>/// 將datatable轉換為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.Dictionary<string, object> drow = new System.Collections.Generic.Dictionary<string, 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則添加逗號分隔    if (j < dt.Columns.Count - 1)    {     sb.Append("/"" + dt.Columns[j].ColumnName.ToString() + "/":" + "/"" + dt.Rows[i][j].ToString() + "/",");    }     //如果值為最后個字符則不添加逗號    else if (j == dt.Columns.Count - 1)    {     sb.Append("/"" + dt.Columns[j].ColumnName.ToString() + "/":" + "/"" + dt.Rows[i][j].ToString() + "/"");    }   }   //如果為最后一個值的話 則不添加逗號   if (i == dt.Rows.Count - 1)   {    sb.Append("}");   }   else   {    sb.Append("},");   }  }  sb.Append("]");  return sb.ToString(); } else { return null; }}

希望本文所述對大家asp.net程序設計有所幫助。