【2018-07-05】關於ajax的隨筆
阿新 • • 發佈：2018-07-05
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html1
<script> $(document).ready(function () { $("#login").click(function () { var n = $("#name").val(); var p = $("#pwd").val(); $.post("/WebForm1.aspx" , { "name": n, "pwd": p }, dataCallBack); }); dataCallBack = function (rsp) {switch (rsp) { case "1": sessionStorage["USER"] = $("#name").val(); window.open("/HtmlPage2.html", "_self"); break; case "2": $("#t").css("visibility", "visible"); $("#t").text("用戶名錯誤！"); $("#name").val(""); $("#pwd").val(""); break; case "3": $("#t").css("visibility", "visible"); $("#t").text("密碼錯誤！"); $("#pwd").val(""); break; default: alert("系統出錯，請稍後重試！"); } } }); </script>
aspx1
protected void Page_Load(object sender, EventArgs e) { Response.Clear(); string name = Request.Form["name"].Trim(); string pwd = Request.Form["pwd"].Trim(); string str1 = "select count(*) from Users where Uname=‘" + name + "‘"; string strSQL = System.Configuration.ConfigurationManager.AppSettings["SQL"]; SqlConnection conn = new SqlConnection(strSQL); conn.Open(); SqlCommand cmd1 = new SqlCommand(str1, conn); int s1 = (int)cmd1.ExecuteScalar(); if (s1 < 1) Response.Write("2"); else { string str2 = "select count(*) from Users where Uname=‘" + name + "‘ and Upwd=‘" + pwd + "‘"; SqlCommand cmd2 = new SqlCommand(str2, conn); int s2 = (int)cmd2.ExecuteScalar(); if (s2 < 1) Response.Write("3"); else Response.Write("1"); } Response.End(); }
html2
<body>
<div>
<p id="nh">你好,</p>
</div>
<div>
<table border="1">
<thead>
<tr>
<th>name</th>
<th>password</th>
</tr>
</thead>
<tbody id="tb">
</tbody>
</table>
</div>
</body>
</html>
<script>
$(document).ready(function () {
$(function () {
$("#nh").append(sessionStorage.getItem("USER"));
$.ajax({
url: "/WebForm2.aspx",
data: {},
type: "post",
dataType: "json",
success: function (rsp) {
var count = Object.keys(rsp).length;
for (var i = 0; i < count; i++)
{
var str = "<tr > <th>" + rsp[i].name + "</th>";
str += "<th>" + rsp[i].pwd + "</th> </tr>";
$("#tb").append(str);
}
},
error: function () {
alert("err");
}
});
});
});
</script>
aspx2
protected void Page_Load(object sender, EventArgs e) { Response.Clear(); string str = "select * from Users"; string strSQL = System.Configuration.ConfigurationManager.AppSettings["SQL"]; SqlConnection conn = new SqlConnection(strSQL); conn.Open(); SqlCommand cmd = new SqlCommand(str, conn); SqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand = cmd; DataSet d = new DataSet(); da.Fill(d); string json="["; int count = d.Tables[0].Rows.Count; int douhao=0; for (int i = 0; i < count; i++) { json += "{\"name\":\""+d.Tables[0].Rows[i][0]+"\",\"pwd\":\""+d.Tables[0].Rows[i][1]+"\"}"; if (douhao < count - 1) { json += ","; douhao++; } } json += "]"; Response.Write(json); Response.End(); } }
【2018-07-05】關於ajax的隨筆