• ajax连接数据库并操作数据库


     Response.Write("<script  type='text/javascript' language='javascript' >alert('用户名不能为空!请输入!')</script>");

    ---------------------------------------------------------------

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
        <script type="text/javascript" language="javascript">
            function showCustomer() {
                alert("ddd")
                var str = document.getElementById("txtvalue").value;
                if (str == "") {
                    return;
                }
                var xmlhttp;

                if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
                    xmlhttp = new XMLHttpRequest();
                }
                else {// code for IE6, IE5
                    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                }
                xmlhttp.onreadystatechange = function () {
                    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                        document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
                    }
                }
                xmlhttp.open("GET", "Conn.aspx?name="+str, true);
                xmlhttp.send();
            }

            function add() {
                var names = document.getElementById("names").value;
                var Valuses = document.getElementById("Valuses").value;
                if (names == "") {
                    return;
                }
                if (Valuses == "") {
                    return;
                }
                var xmlhttp;
                if (window.XMLHttpRequest) {
                  xmlhttp=new XMLHttpRequest();
                 }
                else{
                    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
                }
                  xmlhttp.onreadystatechange = function () {
                    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                        document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
                    }
                }
                xmlhttp.open("POST", "addweb.aspx", true);
                  xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                  xmlhttp.send("names='" + names + "'&Valuses='" + Valuses + "'");
            }
        </script>
    </head>
    <body>
        <input type="button" id="btncoon" value="连接" onclick="showCustomer()" /><br />
        <input type="text" id="txtvalue" />
        <input type="button" id="Button1" value="查询" onclick="showCustomer()" />
        <br />
        <input type="text" id="names" /><input type="text" id="Valuses" />
        <input type="button" id="btnadd" value="添加" onclick="add()" />
        <div id="txtHint">
        </div>
    </body>
    </html>

    ------------------------------------------------------------

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Conn.aspx.cs" Inherits="WebApplication1.Conn" %>
    <%@ Import Namespace="System.Data" %>
    <%@ Import Namespace="System.Data.SqlClient" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
        <%
            string strconn = "Data Source=PC-201001081513;Initial Catalog=WebFirst;Integrated Security=True";
            SqlConnection conn = new SqlConnection(strconn);
            SqlCommand cmd = new SqlCommand();
              if (conn.State == ConnectionState.Closed)
            {
                conn.Open();
            
                 
            }
              string ad = Request["name"];
              string sql = "select Name,Valuses,ParentId from DaoHang where name='"+ad +"'";
              cmd.CommandText = sql;
              cmd.Connection = conn;
             // System.Data.DataSet ds = new System.Data.DataSet();
             // System.Data.SqlClient.SqlDataAdapter sda = new System.Data.SqlClient.SqlDataAdapter(cmd);
             // sda.Fill(ds);
             // if (ds.Tables[0].Rows.Count > 0)
              //{
                 
             // }
              SqlDataReader ar = cmd.ExecuteReader();
              while (ar.Read())
              {
                  Response.Write(ar.GetSqlString(0)+"</br>");
              }
           
             
        %>
      
        </div>
        </form>
    </body>
    </html>

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  • 原文地址:https://www.cnblogs.com/annabook/p/3563888.html
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