In the page directive of my page I have set EnableViewState="false". But I am still seeing some viewstate on my page source with this field
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/...................................
How can I remove the view state completely. I am using .NET 4.
What you're seeing is Control State. It cannot be turned off.
try using ViewStateMode property , as you are using .net 4
ViewStateMode="Disabled"
check for these links
Viewstate controling asp.net 4.0
You can't, it's a feature of webforms. If you don't like this, use MVC instead.
Related
Should I use ASP elements with a runat="server" attribute or an HTML form?
It seems like using ASP tags such as <asp:TextBox> is much more comfortable since I don't have to redirect the user to another page on a form submition, but also from what I've seen, it seemed like HTML forms are the more accepted way. I was starting to wonder if using ASP elements increases server load or has any other disadvantage?
In case I should use ASP elements, how do I validate the input with Javascript before sending it to the server?
In case I should use HTML forms, how do I not redirect the user on submition and also not run the server code on page load?
You can easily use the HTML5 input type in Web Forms by adding the runat="server" attribute, so that it can be accessed on the server-side:
<label for="name">Name:</label>
<input type="text" id="name" name="name" required
minlength="4" maxlength="8" size="10" runat="server">
Note, on the server-side you will access it via the Value property of the input element, not with the Text property of a typical ASP.NET textbox control.
Contrary to what a lot of people think, ViewState only ever becomes a problem when people do silly things like nesting data-bound controls, in which case it can become bloated very quickly.
Not sure what you're asking regarding validation... but you still have options like this on both client and server. If you're working with an existing Web Forms project, I would stick with regular ASP.NET controls and keep it simple. This way, you can have out-of-the-box validation on both client and server.
I'm a new comer to ASP.NET. Before that, I was a classic ASPer.
As I know:
ViewState use to maintain some complicate-property(sorry for my arbitrary description.Only to differentiate basic property like value).
ViewState go with PostData and back to server in PostBackData.
ViewState record the latest control status. Compare it with PostData to determine if a event should be fire like SelectedIndexChange.
WebForm is Event base and disable ViewState this engine failed. But ViewState could be mighty.
On some well-known Asp.Net sites like
https://stackoverflow.com/
http://www.codeproject.com/
when I look over source code.I can't see something like
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="31zA00LgYW9+3QuC4YmxF4w3eBAWhuZRL89OB+6X4AwCFpYIR2914D5a4PWubGveAods0+i/2T21mmpYlHx/sv+5gsGfyYPd0bhj76B0yy4=" />
Does those websites never use a runat="Server" and disable ViewState?
If so, I don't Know the reason to use WebForm when throw away ViewState. Why not MVC?
Is it possible to get the value of the view state that ASP.NET writes in:
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="..." />
, before the processing is done for the page, in C#, in one of the page events, such as
OnSaveStateComplete
If so, how?
Thanks!
Simple answer - no.
You could start playing with internal methods like System.Web.UI.Control.SaveViewStateRecursive using Reflection but you have a very good chance that whatever you will build will stop working on the next .NET Framework update.
If you want to provide custom storage mechanism for ViewState you would implement PageStatePersister.
I have a classic asp application. I want to post a contest form from that page to an Asp.Net form. The reason is that I want to use a lot of logic i have built into an Asp.Net page for validation before entering into the database and I don't know asp very well. Not to mention asp.Net being more secure.
What's the best way to accomplish this goal? My thoughts are as follows:
My asp Page:
<html>
<body>
<form action="/Contests/entry.aspx" method="post">
Name: <input type="text" name="fname" size="20" />
Last Name: <input type="text" name="lname" size="20" />
<input type="submit" value="Submit" />
</form>
</body>
</html>
aspx page is running in a Virtual Directory and would handle anything posted to it.
Is this possible, or does aspx prevent this kind of thing?
I ( preferably ) don't want to create the form in aspx as my colleague wants to have control of the page and build the html himself and I don't want the hassle of constantly changing it.
Are there caveats I need to consider?
What roadblocks will I run into?
How do I access the Posted Form Values? Request.Form?
Yes it is possible. In general, a POST is a POST. So you can post from a PHP page to a .NET page if you wanted. You would access the Request.Form variables just as you do now. You will have to look at the ASP Classic page to see the names of the post items but in general, you can access them as if you had pasted from .NET page.
This can be done and works fine. You will access the Posted Form values as you said via Request.Form.
I think the biggest caveat is that you will need to handle invalid data in some way - typically with a webform the .aspx page would be displayed again with validation errors, but that would likely be inappropriate for your circumstance. Probably you will need to redirect them back to the .asp page with query string parameters indicating the failures and the page will need code allowing it to fill in the form fields with their previous values and display the error message.
How about calling an ASP.NET webservice from classic asp?
https://web.archive.org/web/20210125161040/http://www.4guysfromrolla.com/webtech/070302-1.shtml
I'm trying to create a generic <input type="button"> button in ASP.Net using an ASP.Net control and I'm unfortunately stuck using ASP.Net 1.1 right now. I know you can use the UseSubmitBehavior="False" attribute in later versions of ASP.Net but I can't seem to find a way to do this in ASP.Net 1.1. Is there a way to do this or will I need to just create the HTML version of the control and set it to runat="server"?
ASP:Button in ASP.NET 1.1
Well it looks like you just can't do this with an asp.net control. The only way I was able to make this work was with an <input type="button" runat="server"> control.