如何使用UpdatePanel的计时器控件定期更改图像 [英] How To Change An Image Periodically With Timer Control Using UpdatePanel

问题描述

在我的网站上，需要显示一张图片，并且该图片应定期更改.
我使用了以下代码.

In my website, an image is needed to show and should change periodically .
I used the below code.

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Timer ID="Timer1" runat="server" OnTick="gettickvalue" Interval="2000">
</asp:Timer>
<asp:UpdatePanel ID="BannerPanel" runat="server" UpdateMode="Conditional">
<Triggers >
<asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
</Triggers>
<ContentTemplate>
<asp:Image ID="imgBanner" ImageUrl="~/images/banner_1.gif" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>

在代码部分中添加以下行.

In the code section add the following lines.

protected void gettickvalue(object sender, EventArgs e)
{
Random RandomNumber = new Random();
int n = RandomNumber.Next(1, 9);
imgBanner.ImageUrl = System.String.Concat("images/banner_", n.ToString(), ".gif");
}

* ------ *
但是我首先可以看到图像正在显示，经过特定时间延迟的图像改变了，但是立即又出现了.所以看不到任何图像.
我将间隔增加到5000或以上，但仅更改了图像即将到来的时间.
如何设置图像显示5-6秒.

*------*
But I can see in first a image is showing, after particular time delay image changed but immediately come another .So Can''t see any image.
I increased interval to 5000 or above , but it is changed image coming time only.
How can set image appear 5-6 seconds .

推荐答案

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尝试将其设置为50000或60000，因为时间以毫秒为单位.

try to set it to 50000 or 60000 since the time is in millisec.

我的文件是不是gif格式.所有文件均为jpg格式.我将类型更改为jpg.然后文件正确显示

My files are in not in gif format. All files are jpg format. I changed type to jpg . Then files showing correctly

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