环境:Visual Studio 2008
语言:C#
程序:ASP.NET 当.net控件TextBox1失去焦点时,假设事先并不知道此控件的ID.
我想在页面前台HTML环境中,得到.net控件TextBox1的ID,请问代码该如何编写????
语言:C#
程序:ASP.NET 当.net控件TextBox1失去焦点时,假设事先并不知道此控件的ID.
我想在页面前台HTML环境中,得到.net控件TextBox1的ID,请问代码该如何编写????
再在JS函数里面取.
{
Button1.Text = ((Button)sender).ID.ToString();
}
Button1.Text就得到了Button1,即控件的ID<script language= "javascript ">
function mouseClick()
{
var e = window.event.srcElement;
alert(e.id);
//你可以这样 用JS取得ID后 放在一个服务器控件上 后台就能读取了
//document.getElementById( "TextBox1 ").value = e.id }
document.onclick = mouseClick
</script>
是不是TextBox嵌套在服务器控件里面的?然后生成页面的时候ID变了?
那就用下面这个。
var tbUserName = document.getElementById('<%=tbUserName.ClientID%>');
一般的就用用这个。当.net控件TextBox1失去焦点时,假设事先并不知道此控件的ID.
我想在页面前台HTML环境中,得到.net控件TextBox1的ID,请问代码该如何编写????语句极不通顺,是不是想失去焦点的时候获取ID。不就是那种注册的时候失去焦点用AJAX去判断用户名是否注册过。
<asp:TextBox ID="tbUserName" runat="server" onblur="checkUserName()"
MaxLength="20" BorderColor="Black" BorderWidth="1px"></asp:TextBox>
function checkUserName()
{
// Check whether there's text in tbUserName
var tbUserName = document.getElementById('tbUserName');
var checkResult = document.getElementById("checkResult");
checkResult.innerHTML = "<img src='images/Web/ajax.gif' />"
var b = document.getElementById("Button_Regist");
if (tbUserName.value == "")
{
b.disabled = true;
checkResult.innerHTML = "请输入账号";
return;
}
else if (tbUserName.value.length < 3 && tbUserName.value.length > 0)
{
b.disabled = true;
checkResult = document.getElementById("checkResult");
checkResult.innerHTML = "你输入的账号长度太短!";
return;
}
b.disabled = false; // Create XMLHttpRequest object
try
{
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e2)
{
xmlHttp = false;
}
} if (!xmlHttp && typeof XMLHttpRequest != 'undefined')
{
xmlHttp = new XMLHttpRequest();
}
// Build the URL to connect to
var url = "./AJAX/CheckUserNameService.aspx?User_Name=" + tbUserName.value; // Open a connection to the server
xmlHttp.open("GET", url, true); // Setup a function for the server to run when it's done
xmlHttp.onreadystatechange = callBack_CheckUserName; // Send the request
xmlHttp.send(null); } function callBack_CheckUserName()
{
if (xmlHttp.readyState == 4)
{
var message;
var isValid = xmlHttp.responseText;
var checkResult = document.getElementById("checkResult");
if (isValid == "true")
{
message = "<img src='images/Web/checked.png' />";
}
else
{
message = "该账号已经注册过,请重新输入新的账号。";
}
checkResult.innerHTML = message;
}
}