[英]How to change source image property from code behind
I'm wondering how to change a color property of an image from code behind of same page. 我想知道如何从同一页面后面的代码更改图像的颜色属性。 Below, I have html code for the image that I want to change to yellow if file is not contained in important announcements folder (this is checked in code behind). 下面,如果文件没有包含在重要的公告文件夹中,我有想要更改为黄色的图像的html代码(这在代码后面检查)。 Here's the html of image: 这是图像的html:
<li class="levelOne"><a class="button notice buttonEight" href="#">
<img id="importantImg" src="<%= Page.ResolveUrl("~/{0}/_res/_images/icon_notice.png",
PBS.Cms.Settings.PBSFolderName) %>" /></a></li>
Here's a snippet of the code behind for this page: 以下是此页面背后的代码片段:
//validate folder is important announcements
if (!cd.FolderName.Equals("Important Announcements"))
{
//string folderName = cd.FolderName.ToString();
Response.Write("folder doesn't equal Important Announcements");
}
Any help? 有帮助吗?
Thanks! 谢谢!
Jason 贾森
你可以在img标签上添加runat =“server”,然后在你可以放的代码中添加
importantTag.Attributes["src"] = "yourNewImageUrl";
If you are going to do it from the markup, I think you need this instead: 如果你打算从标记中做到这一点,我认为你需要这样做:
<li class="levelOne"><a class="button notice buttonEight" href="#">
<img id="importantImg"
src="<%= Page.ResolveUrl(string.Format("~/{0}/_res/_images/icon_notice.png",
PBS.Cms.Settings.PBSFolderName)) %>" /></a>
</li>
But instead, you could do it completely from code behind. 但相反,你可以完全从代码背后做到。 Having the image declared like this: 将图像声明为:
<img id="importantImg" runat="server" src="" />
You can do this on code behind: 您可以在后面的代码上执行此操作:
importantImg.src=Page.ResolveUrl("relative/path/to/image");
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