I'm an ASP.NET MVC beginner - I want to get user information by entering the user name in a textbox username. Then when I click a tab button or move the mouse away from the textbox username, after the textbox the user's information will be displayed - like the textbox TextChanged event in webforms.
How can this be achieved? Thanks.
Related
In ASP.NET MVC, i am having 3 pages. how to display previous page with already selected value on clicking back button from one page. (eg dropdown,radiobutton, button selected)
Thanks
I have a form fields in which I am displaying data.
The values should be disabled and edit button should appear, after clicking on Edit button, the values should be enabled and user can edit the data and only save button should appear
How to achieve these two requirements in a single form in Asp.Net MVC4?
Use templates.
An ITEM TEMPLATE and then an EDIT TEMPLATE.
When the user presses the EDIT button, set the action to change to mode of the form to EDIT.
I am working on .net 2.0 I am populating a Grid View with multiple textboxes. The textbox has text change event. There is also a button with click event. The problem I am facing is that when the I enter the text in textbox and then click on button, the text change event gets fired, and the execution does not come to button click block. How can I detect if button has been clicked when both the events are fired.
There is the textbox with call to function for text change event
<asp:TextBox ID="txtChassis" runat="server" CssClass="form_text_box" AutoPostBack="true" OnTextChanged="Chassis_TextChanged"></asp:TextBox>
and also call to function for button click event.
<input class="form_button" id="btnSearch" title="Show Details" accesskey="S" type="submit"
value="SAVE" name="btnSave" runat="server" onserverclick="btnSearch_ServerClick"/>
However, in case text is placed in textbox and button is clicked, then the text change event function gets called.
Your Problem is, that events in ASP are only raised after a PostBack.
The Post back happens if the Button is pressend, and the Client Posts Back (therfor the Name) his Data of the Fields.
After this PostBack the Server (your application) calls all events that happend during the last Page_Load.
As far as i know, there is no real order in which the events are thrown, but the textChanged event should be thrown anyway.
If you want to hand your textChanged event directly after the Text hast changed you have to use "AutoPostBack" as Myat Thu already mentioned. Be aware that this increases your traffic signifficant, and can also change the flow of your code!
I suggest designen the events indipendet so the user can hit the "PostBack Button" and all events are called at one post back. This saves traffic and load on the server.
But this is just my personal oppinion.
Are you writing code for a window application or a web application? If you're writing for a web application, there are properties for TextBoxes which are:
CaseValidation
AutoPostBack
You should try out both of these properties for your TextBox object.
I have a button and a label.
on clicking on that button i want to change the text of label.
How can i do this in Asp.net mvc 1.0.
Unlike in ASP.NET Webforms, there are no events in ASP.NET MVC!
You could use HtmlHelper.ActionLink to create a link to the current view with a parameter containing the new label text.
For simple things that don't really deserve a parameter I would simply use JavaScript though.
I have 2 radio button with values New & Existing. If user chooses New, then I show a textbox on the form and if Existing a dropdown and textbox is hidden. The question is , does the hide/show of the textbox/dropdownlist have to be written in the View or the Controller class? Also when I choose the selection my whole form is posting back and hence all validation error msgs are being shown which should not be shown nless the save button is clicked, how do I a partial postback without full form submission? Any code snippets or urls would be benificial in this respect.
The question is , does the hide/show of the textbox/dropdownlist have to be written in the View or the Controller class?
Just show/hide with jQuery that.
Also when I choose the selection my whole form is posting back and hence all validation error msgs are being shown which should not be shown nless the save button is clicked, how do I a partial postback without full form submission? Any code snippets or urls would be benificial in this respect.
Perform 'partial postbacks' through javascript.
Post form to save action only once when it's ready (when Save button is clicked).
Some resources:
jQuery tutorial
jQuery AJAX
About form AJAX`ifying
If I understand you correctly, the answer is the hiding and showing of controls should be done on the view as it's display specific.
If you use javascript to show and hide the controls then because it's on the client side you would not have to postback the form, and could do server side validation when the save button is clicked.
jQuery is very good: Jquery Website
Hope that helps?