asp.net-mvc 如何在控制器中显示警报消息
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how to display alert message in controller
提问by Saloni
I am using one controller which is inserting values in the database. I want to display alert message from controller when the values insertesd in the database successfully. Is it possible. If yes then how?
我正在使用一个在数据库中插入值的控制器。当值成功插入数据库时，我想显示来自控制器的警报消息。是否可以。如果是，那么如何？
采纳答案by melaos
Basically that depends on how are you inserting the value into the database, as you would need a method to tells you whether the insertion was successful. As there's a few ways to do that now, linq/entity framework/sql/etc.
基本上，这取决于您如何将值插入数据库，因为您需要一种方法来告诉您插入是否成功。由于现在有几种方法可以做到这一点，linq/entity framework/sql/etc.
Then after you know whether did the insertion happens, then you can just assign a value to a variable and then from the code/aspx just check the value and do a simple alert.
然后在您知道插入是否发生后，您只需为变量赋值，然后从代码/aspx 中检查该值并执行简单的警报。
<script type="text/javascript">
//i'm using jquery ready event which will call the javascript chunk after the page has completed loading
$(document).ready(function(){
//assuming that your variable name from the code behind is bInsertSuccess
var bSuccess = "<%= bInsertSuccess %>";
if(bSuccess){
alert("Successfully Inserted");
}
});
</script>
回答by Husein Roncevic
You can add the result to ViewData. For example:
您可以将结果添加到 ViewData。例如：
if (SaveToDbOK)
{
ViewData["Success"] = "Data was saved successfully.";
// Do other things or return view
}
In your view you can place anywhere:
在您看来，您可以在任何地方放置：
MVC2:
MVC2：
<% if (ViewData["Success"] != null) { %>
<div id="successMessage">
<%: ViewData["Success"] %>
</div>
<% } %>
MVC3:
MVC3：
@if (ViewData["Success"] != null) {
<div id="successMessage">
@ViewData["Success"]
</div>
@}
I used this approach in my last project in order to make the information returned from the server unobtrusive. Checking whether ViewData["Success"] or ViewData["Failure"] are done in the Master page, the divs are formatted using CSS, jQuery code was used to hide the notifications after 5 seconds.
我在上一个项目中使用了这种方法，以使从服务器返回的信息不显眼。检查是否在母版页中完成了 ViewData["Success"] 或 ViewData["Failure"]，div 使用 CSS 格式化，使用 jQuery 代码在 5 秒后隐藏通知。
Regards,
问候，
Huske
哈士奇
回答by shahnila
public ActionResult UploadPropertyImage()
{
// Business logic....
return Content("<script language='javascript' type='text/javascript'>alert('Save Successfully');</script>");
}
回答by catdog01
You may add below code to tell user
您可以添加以下代码告诉用户
Return Content("Data added successfully");
