我正在使用一个简单的Asp.Net按钮并试图在页面加载事件中隐藏它,我想在做一些客户端脚本后显示它。
我已经通过这种方式尝试了document.getElementById('<%=Button1.ClientID %>').style.visibility = "visible";
并且没有告诉我。
那么如何启用它呢?
的Page_Load:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Button1.Visible = False
End Sub
这是我的剧本:
<script type="text/javascript">
// Convert divs to queue widgets when the DOM is ready
$(function () {
$("#uploader").plupload({
// General settings
runtimes: 'gears,flash,silverlight,browserplus,html5',
url: 'Final.aspx',
max_file_size: '10mb',
max_file_count: 25,
chunk_size: '1mb',
unique_names: true,
// Resize images on clientside if we can
// resize: { width: 320, height: 240, quality: 90 },
// Specify what files to browse for
filters: [
{ title: "Image files", extensions: "jpg,gif,png" },
{ title: "Zip files", extensions: "zip" }
],
// Flash settings
flash_swf_url: 'js/plupload.flash.swf',
// Silverlight settings
silverlight_xap_url: 'js/plupload.silverlight.xap'
});
// Client side form validation
$('form').submit(function (e) {
var uploader = $('#uploader').plupload('getUploader');
// Files in queue upload them first
if (uploader.files.length > 0) {
// When all files are uploaded submit form
uploader.bind('StateChanged', function () {
if (uploader.files.length === (uploader.total.uploaded + uploader.total.failed)) {
$('form')[0].submit();
}
});
uploader.start();
}
else
alert('You must at least upload one file.');
return false;
});
var uploader = $('#uploader').plupload('getUploader');
uploader.bind('FileUploaded', function (up, file, res) {
$('#showfilelist').append("<div id=" + file.id + " class='thumb'><a href='uploads/" + document.getElementById("currentDirectory").value + "/" + file.name + "' target='_blank' rel='gallery'><img src='uploads/" + document.getElementById("currentDirectory").value + "/" + file.name + "' width='50' height='50'/></a></div>");
$('#Maintabs').tabs('enable', 1);
document.getElementById('<%=Button1.ClientID %>').style.visibility = "visible";
});
});
答案 0 :(得分:10)
如果将控件的Visible
属性设置为false
(在服务器端),则控件将不会呈现给客户端,因此没有任何内容可以更改其样式。
如果要在服务器上隐藏它但仍然将其呈现给客户端,请设置visibility
CSS属性(通过Style
属性),或者为元素分配一个将隐藏的CSS类它(通过CssClass
属性)。
答案 1 :(得分:7)
感谢您的所有建议,我已将其可见性设置如下
<script type="text/javascript">
$(function () {
document.getElementById('<%=Button1.ClientID %>').style.visibility = "hidden";
});
<script>
答案 2 :(得分:2)
为什么不能使用display属性呢?
document.getElementById('<%=Button1.ClientID %>').style.display= '';
document.getElementById('<%=Button1.ClientID %>').style.display= 'none';
这样,您不会触及服务器属性,而是触及客户端属性。您可能需要稍微调整上面的代码。
答案 3 :(得分:1)
如果元素总是在页面加载时隐藏,那么我只需设置一个默认的类或样式来设置display: none;
,然后用javascript切换它
所以在HTML for you按钮
<asp:button runate="server" id="Button1" CssClass="displayNone"></asp:button>
<script>
$("#Button1").removeClass(displayNone");
</script>
<style>
.displayNone { display: none; }
</style>