Group items tagged

Now instead of error message add the image tag as shown below. <img src=alert.gif' style='width:15px;height:15px;'> Note : Image tag doesn't have have an end tag. So don't add. Then in test your page that shows images for errors. See the picture below. Know More: You can also embed sound instead of error message or error image. <asp:RequiredFieldValidator ControlToValidate="TextBox1" EnableClientScript="false" ID="RequiredFieldValidator1" runat="server" Text="<bgsound src='C:\Windows\Media\Windows Error.wav'>"></asp:RequiredFieldValidator> Just make sure that the EnableClientScript="false"  when you want a sound instead of a text message.

那么，我的建议是只有当你不知道类型的时候，才使用var。这里是我不同的见解和用法。请看如下代码片断： var procs = from p in ServiceController.GetServices() where p.Status == ServiceControllerStatus.Running select p; procs.ToList().ForEach(p=> Console.WriteLine(p.ServiceName)); procs的类型无疑为IEnumerable<ServiceController>，然而这却与我无关。我首先关注的是procs是一个列表，列表中的每一项都具有一个属性ServiceName。潜在的类型对于编译器很重要，而那些不得不去阅读代码的人们却不是编译器，对吗？