I'm using asp.net to build an ipad webapp. I know that using input type="email" will cause the keyboard layout on the ipad to change to handle email input more easily than the default. The problem is I'm using a server side text box control. Does anyone know how to make a server side control do this?
textBox.Attributes.Add("type", "email")
or write it out like this in your aspx
<input type="email" id="emailTextBox" name="emailTextBox" runat="server" />
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 want to make my input to only accept files from gallery instead of allowing the user to open the camera.
How can I achieve it?
ASP.NET
<asp:FileUpload ID="filGallery" runat="server" AllowMultiple="true" />
HTML 5
<input type="file" id="filGallery" multiple="multiple" />
The behaviour I want is similar to the one found in iOS 8 or less, where input with multiple files enabled couldn't open the camera
I don't think there is a way to force using gallery - current trend is more on using camera (and suggesting using front or back) rather than disabling it.
However, there is a similar question on SO (but focus on type of capture) where that answerer has pointed to some ways of input attribute you may try out:
original SO: https://stackoverflow.com/a/40512470/2564920
More detail test he has done regard to the mobile capture: https://addpipe.com/blog/correct-syntax-html-media-capture/
A test page which you can try out: https://addpipe.com/html-media-capture-demo/
specifically one setting which is
<input type="file" accept="image/*" capture="filesystem">
looks promising - but probably won't work (since this syntax is deprecated and capture attribute in newer spec is used to say you want to use camera - choosing between front or back camera source)
just use simple method to open gallery in mobile
<input type="file" id="fileProfile2" name="fileProfile2" accept="image/png,image/jpeg" capture="filesystem">
I've got a styling question on my hands. Using sensenet, a platform for ASP.net functionality, forms are done with not only sensenet language, but also ASP.net language as well.
I'm having a problem making the ASP:TextBox feature look like the bootstrap input box. I've called the bootstrap css file, tried changing the class for the ASP:TextBox code, but nothing works aside from just using the html tag of
<input class="text input-sm">
Here's the code I have so far:
<asp:TextBox CssClass="text input-sm" ID="InnerControl" placeholder="Middle Name" runat="server"></asp:TextBox>
.. and the css is being incoporated here:
<sn:CssRequest CSSPath="$skin/styles/Projectname/bootstrap.min.css" ID="pageTemplateUIStyleReq1" runat="server" />
Is there anyway to make the ASP:TextBox to look like the bootstrap input box but also function the way it's meant to function through ASP language?
Attached are images of the before and after-sought effects:
what I have now:
what I'm looking to attain:
The way you are adding the class to your textbox is correct. The problem is here:
<sn:CssRequest CSSPath="$skin/styles/Projectname/bootstrap.min.css" ID="pageTemplateUIStyleReq1" runat="server" />
Just add a normal reference to your stylesheet and don't try to load it server side. If your page requires this, check to ensure it is loading bootstrap correctly in your browsers dev tools.
I want to open file dialog on click of a button in asp.net without using file upload control. Is there a way to do this?
You could use HTML directly if you don't like server controls: <input type="file" name="foo" />
The only way to open a browse dialog (short of using from client side plugin, such as a Java Applet) is to use the file type input:
<input type="file" name="somename" />
This is what the FileUpload control renders.
If you don't want to use that control, you can just use the direct HTML element.
Each browser will render this slightly differently though.
i would like to know what exactly the difference between Html control
and asp.net web control. why do we need these two types of controls?
i have placed one html input text ,html button and asp.net text box AND ASP.NET BUTTON on my web page
<input id="Text1" type="text" />
<input id="Button2" type="button" value="button" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
when i take view source, both are rendered similarly
<input id="Text1" type="text" />
<input id="Button2" type="button" value="button" />
<input name="TextBox1" type="text" id="TextBox1" />
<input type="submit" name="Button1" value="Button" id="Button1" />
what is the advantage of web control over html control.
I got some links in the internet,but not clear what exactly
they are used for.
http://www.extremeexperts.com/Net/FAQ/DiffBetweenServerandHTMLControls.aspx.
Could any one please explain the difference between these two controls.
First, if you drag an Html control from the Toolbox onto your design surface as in your example, the tag created does not include runat="server". That means it is native Html tag and not a .NET control. A native Html tag without the runat="server" has no server-side functionality. Thus, you could not set the value of the your "Text1" input tag in the code-behind.
Second, once you add the runat="server" to your Html input tag, you convert it from a native Html tag into a HtmlControl which derives from System.Web.UI.Control. Now the question could morph into the differences between something that derives from System.Web.UI.Control and System.Web.UI.WebControl. However, to specifically address your question, let's compare a standard input type="text" control to the TextBox control:
TextBox control can be access from the code-behind where an input control cannot (not easily) which also means that you can wireup server-side events for a TextBox control whereas you cannot with a standard Html control.
A TextBox control automatically saves its value using ViewState.
A TextBox control can be skinned using a Theme and .skin file whereas a native Html control cannot.
A TextBox can render as either an input type="text" control or a textarea depending on its TextMode property.
A TextBox control can participate in validation using validators.
Last but not least, the TextBox control can use control adapters to render differently in different browsers if required. See http://msdn.microsoft.com/en-us/magazine/cc163543.aspx.
Now, all that said, if you do not need any of WebControl capabilities, then using an native Html control is substantially leaner. In your example, you simply dragged two empty controls onto your design surface. If that is all you needed then using the .NET control would be overkill. However, as you start adding AutoComplete and server-side events and such, the full content, Javascript and all, of what gets to the Browser is much larger.
In short HTML controls don't persist their state while Postbacks. On the other hand ASP.Net control provides you to luxury to have their state saved while several Postbacks automatically. Different while using ASP.Net control instead of HTML element is:
<input type="hidden" name="__VIEWSTATE" value="dDwtNTI0ODU5MDE1Ozs+.................." />
This hidden field is auto generated by ASP.Net and it contains all you controls state in value attribute.
The server controls have a runat="server" attribute which enables you to provide server-side logic for these controls in the code-behind. You can also add this attribute to existing HTML controls to gain this same functionality.
The HTML controls are simple controls that correspond directly to HTML elements.
The ASP.NET Web Controls abstract the HTML elements, and generally provide more control over styling (though some would call this a bad thing).