Why are my HTML buttons in Visual Studio not creating Event Handlers when double clicked?
Question
I have added buttons into a web form in Visual Studio 2015 using HTML. So those buttons are in the design tab. When i double click the button in the Design Tab. It is not opening the ASPX.CS page. Is that normal? I was under the impression that i would work like that. Instead i have to go and manually code each event handler.
I have searched google and tried to run repairs on Visual Studio but found no avail.
<%@ Page Language="C#" AutoEventWireup="true"
CodeBehind="WebForm1.aspx.cs" Inherits="Module2LabExercise.WebForm1" %>
<!DOCTYPE html>
<html>
<head>
<title>
Currency Converter
</title>
</head>
<body>
<form runat = "server">
<div>
Convert:
<input type = "text" ID = "US" runat = "server" />
U.S. dollars to
<select ID = "Currency" runat = "server" />
<br /> <br />
<input type = "submit" value = "OK" ID = "Convert"
OnServerClick = "Convert_ServerClick" runat = "server" />
<input type = "submit" value = "Show Graph" ID = "ShowGraph"
OnServerClick = "ShowGraph_ServerClick" runat = "server" />
<br /> <br />
<img id="Graph" runat="server" src="//:0"/>
<br /> <br />
<p style = "font-weight: bold" ID = "Result" runat = "server"
>
</p>
</div>
</form>
</body>
</html>
`
I was thinking that if i double click the button. It would auto open the Event Handler and create the event handler. If i am wrong. Please correct me and let me know. Just coming here because im out of ideas.
3 answers
solution1
0 2019-05-20 04:09:20
you add that code in your backend of button implementation: here is code
Response.redirect("ex.aspx");
ex.aspx is your file name
if it not working then add:
Server.Transfer("ex.aspx");
solution2
0 2019-05-20 04:35:21
VS won't do this for non-ASP tags, but if you instead put:
<asp:Button ID="Convert" runat="server" />
instead of
<input type = "submit" ID = "Convert" runat = "server" />
Then you'll get that feature
solution3
0 2019-05-20 04:37:08
As for
It is not opening the ASPX.CS page. Is that normal?
yes it is normal as the button is an HTML input[type="submit"] with runat="server and not an asp.net wrapped button like: <asp:button> . Hence it is not transpiled by the Asp.net .
And why are you using runat="server" on an HTML button? If you really want a server-side event to be called use the <asp:Button> that way you will be able to create the click-event on double-clicking the button.
But if you still persist on using it you have to 3 ways attach the click event-handler to the HTML button.
Event handler in aspx designer page.
//attach a script tag to your aspx page and add the click event to it.
<script language="C#" runat="server">
protected void Convert_ServerClick_manual1(object sender, EventArgs e)
{
//your code here
}
</script>
Now just add an onserverclick="Convert_ServerClick_manual1" attrubute to the button.
Attach an event handler on the
pageloadevent ofaspx.cspage
protected void Page_Load(object sender, EventArgs e)
{
Convert.Click += Convert_ServerClick_manual2;
}
now define the event handler below the pageload event:
private void Convert_ServerClick_manual2(object sender, EventArgs e)
{
//your code here
}
Manual event handler
//just create the event handler for your button on the `aspx.cs` page and paste the handler name to the `HTML` button.
private void Convert_ServerClick_Manual3(object sender, EventArgs e)
{
//your code here
}
Then in your design page use:
<input type = "submit" value = "OK" ID = "Convert" OnServerClick = "Convert_ServerClick_manual3" runat = "server" />
manually create an event handler for the input button[runat="server"] in the <yourPage>aspx.cs and attach it to the HTML button.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.