本程序主要功能是检查用户输入的用户名是否在检查的范围之内
CheckUserName.htm代码:
<head>
<title></title>
<script src="jquery-1.8.3.js" type="text/javascript"></script>
<script src="MyAjax.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$("#username").blur(function () {
var username = $("#username").val();
MyAjax("CheckUserName.ashx?username=" + username,
function (resTxt) { //resTxt为response返回的结果
if (resTxt == "ok") {
$("#msg").text("用户名可用");
}
else {
var strs = resTxt.split("|"); //对response返回的结果进行分割
$("#msg").text(strs[1]);
}
},
function (status) {
$("#msg").text("服务器出现" + status + "错误");
});
});
});
</script>
</head>
<body>
<input type="text" id="username" /><span id="msg"></span>
</body>
CheckUserName.ashx代码:
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/html";
string username = context.Request["username"];
if (string.IsNullOrEmpty(username))
{
context.Response.Write("error|用户名必填");
return;
}
if (username.Length < || username.Length >= )
{
context.Response.Write("error|用户名必须在3-10之间");
return;
}
if (username.Contains("毒") || username.Contains("枪"))
{
context.Response.Write("error|含有违禁词汇");
return;
}
int r = (int)SQLHelper.ExecuteScalar("select count(*) from User where name=@name",
new SqlParameter { ParameterName="@name",Value=username});
if (r > )
{
context.Response.Write("error|用户名已被使用");
return;
}
context.Response.Write("ok");