如何在鼠标悬停时在网格视图中放大图像
本文关键字:视图 放大 网格 图像 鼠标 悬停 | 更新日期: 2023-09-27 18:20:33
我想在鼠标悬停时放大网格视图中的图像。但在脚本中,它不允许写onhouse、onclick或任何东西。你能帮忙吗?
我的脚本:
<ItemTemplate>
<asp:Image ID="img" runat="server" ImageUrl='<%#Eval("IMAGE")%>' Height="50" Width="50" Style="cursor:pointer" />
</ItemTemplate>
<EditItemTemplate>
<asp:Image ID="img" runat="server" ImageUrl='<%#Eval("IMAGE")%>' Height="50" Width="50" />
</EditItemTemplate>
</asp:TemplateField>
Java脚本代码
<script type="text/javascript">
$(".pic").live("mousemove", function (e) {
var dv = $("#popup");
if (dv.length == 0) {
var src = $(this)[0].src;
var dv = $("<div />").css({ height: 250, width: 250, position: "absolute" });
var img = $("<img />").css({ height: 250, width: 250 }).attr("src", src);
dv.append(img);
dv.attr("id", "popup");
$("body").append(dv);
}
dv.css({ left: e.pageX, top: e.pageY });
});
$(".pic").live("mouseout", function () {
$("#popup").remove();
});
</script>
使用Java脚本代码
<asp:Image ID="img" ImageUrl='<%#"http://gpssurvey.nsps.co.in"+(Eval("IMAGE"))%>' runat="server" Width="40px" Height="50px" CssClass="pic zoom" />
Onmouseover是一个javascript事件。您只需要将"onmouseover"属性添加到所需的asp:Image中,在那里放置一个javascript方法,该方法应该将一个大图像的引用放在某个隐藏的div中,并使该div可见。
nC#不容易获得。为此,您需要使用jQuery。Jquery使用相同的javascript。提供了放大图像的插件。您可以使用jQuery放大插件。
这是代码
在html中-
<div class="magnify">
<!-- This is the magnifying glass which will contain the original/large version -->
<div class="large"></div>
<asp:Image ID="img" runat="server" ImageUrl='<%#Eval("IMAGE")%>' class="small" Height="50" Width="50" Style="cursor:pointer" />
jQuery-
$(document).ready(function(){
var native_width = 0;
var native_height = 0;
//Now the mousemove function
$(".magnify").mousemove(function(e){
//When the user hovers on the image, the script will first calculate
//the native dimensions if they don't exist. Only after the native dimensions
//are available, the script will show the zoomed version.
if(!native_width && !native_height)
{
//This will create a new image object with the same image as that in .small
//We cannot directly get the dimensions from .small because of the
//width specified to 200px in the html. To get the actual dimensions we have
//created this image object.
var image_object = new Image();
image_object.src = $(".small").attr("src");
//This code is wrapped in the .load function which is important.
//width and height of the object would return 0 if accessed before
//the image gets loaded.
native_width = image_object.width;
native_height = image_object.height;
}
else
{
//x/y coordinates of the mouse
//This is the position of .magnify with respect to the document.
var magnify_offset = $(this).offset();
//We will deduct the positions of .magnify from the mouse positions with
//respect to the document to get the mouse positions with respect to the
//container(.magnify)
var mx = e.pageX - magnify_offset.left;
var my = e.pageY - magnify_offset.top;
//Finally the code to fade out the glass if the mouse is outside the container
if(mx < $(this).width() && my < $(this).height() && mx > 0 && my > 0)
{
$(".large").fadeIn(100);
}
else
{
$(".large").fadeOut(100);
}
if($(".large").is(":visible"))
{
//The background position of .large will be changed according to the position
//of the mouse over the .small image. So we will get the ratio of the pixel
//under the mouse pointer with respect to the image and use that to position the
//large image inside the magnifying glass
var rx = Math.round(mx/$(".small").width()*native_width - $(".large").width()/2)*-1;
var ry = Math.round(my/$(".small").height()*native_height - $(".large").height()/2)*-1;
var bgp = rx + "px " + ry + "px";
//Time to move the magnifying glass with the mouse
var px = mx - $(".large").width()/2;
var py = my - $(".large").height()/2;
//Now the glass moves with the mouse
//The logic is to deduct half of the glass's width and height from the
//mouse coordinates to place it with its center at the mouse coordinates
//If you hover on the image now, you should see the magnifying glass in action
$(".large").css({left: px, top: py, backgroundPosition: bgp});
}
}
})
})
在这里,我找到了一种使用Css 在网格中放大图像的新方法
Css
.zoom {
transition: transform .2s;
width: 300px;
height: 300px;
}
.zoom:hover {
-ms-transform: scale(1.5); /* IE 9 */
-webkit-transform: scale(1.5); /* Safari 3-8 */
transform: scale(5.1);
}
</style>
Asp标签
<asp:Image ID="img" ImageUrl="~/Images/DDED.png" runat="server" Width="40px" Height="40px" CssClass="zoom"></asp:Image>