MVC :: How To Handle Dynamic HTML Controls In The Controller
Feb 28, 2011
I am working on a project in ASP.Net MVC3 and this model of development is quite new to me, but I think I am starting to get the hang of it.
In my project, I am creating a dynamic array of <input type="check"... Checkboxes. From my understanding, when sending form data it should be processed in the Controller using <form method="post"....
So my question is: what is the best way to go about consuming a dynamic amount of HTML objects sent in the post data? What I am doing right now is looping through all the controls sent VIA: post and parsing the dynamic ones by the ID name. This method seems highly suspect in terms of coding practice. It does work, but I am wondering what the "norm" is for this sort of proceedure?
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Jun 18, 2010
I have this problem of handling postback for controls built dynamically.
I am having something like this:
[code]....
Now, whenever it posts back, the control disappeared. If I remove the !IsPostback, then it will always create the control.
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Sep 7, 2010
I had been created some dynamic radio buttons in a loop inside a dinamy table which is inside an UpdatePanel , but i can not handle the events my code is below:
public void MetodoCreacion()
{
RadioButton RBtn = null;
Table table = new Table();
TableRow row = null;
TableCell cell = null;
for (int i = 0; i < 5; i++)
{
row = new TableRow();
cell = new TableCell();
RBtn = new RadioButton();
RBtn.ID = "RBGN_" + i.ToString();
RBtn.GroupName = "RBGN1";
RBtn.Text = "Opcion " + i.ToString();
RBtn.CheckedChanged += new EventHandler(RBtn_CheckedChanged);
RBtn.AutoPostBack = true;
cell.Controls.Add(RBtn);
row.Controls.Add(cell);
table.Controls.Add(row);
}
UpdatePanel1_UpdatePanelAnimationExtender.Controls .Add(table);
}
public void RBtn_CheckedChanged (object sender, EventArgs e)
{
Label1.Text = ((RadioButton)sender).ID;
}
and the controls doesent call the event.
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May 7, 2015
I have a requirement for generating dynamic controls and store the value in database in a mvc project ,how to make it.
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Aug 13, 2010
In a webforms application, it's possible to add a server control to the markup and then access that control from the corresponding code behind file, but I'm not sure of the MVC equivalent of this functionality.
I've been looking at some tutorials, and it appears that in MVC applications, instead of using server controls, the examples are using HTML helpers, such as Html.TextBox, etc.
However, while I can find examples html helpers in views, I can't find any examples of how these helpers are accessed in the controllers, so I've declared an Html.TextBox in my view but don't know how to access its value in the controller when I hit enter.
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Sep 15, 2010
I need to create a dynamic form using the already existing DB entries, from 3 different tables. I am trying to do this by inheriting ViewModel class, which is comprised of all the model instances (or List of instances of unknown count) within it.
When I inherit the ViewModel in the View Template, the dynamic form gets generated without any issues, and looks fine. The dynamic form is generated based on iterating over the calls for each required model instance in the ViewModel passed to the View.Each call uses a partial view of the instance to generate the form, and hence multiple iterations create multiple instances of the form.
[Code]....
However, when I try to submit the form, the postback does not include the ViewModel object, but rather only the first model instance used in the form.
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Sep 15, 2010
1) Accpet the item in TxtItem in comma seperated values like (Apple, Mango, Orange etc.). Store that item in array object (objArray) in acending order."
2) Create the object of the dropdown list objDropDwon on runtime and fill its items from objArray."
3) Create server side table and add rows on runtime."
4) Add objDropDown to the each row of the table."
5) Handle Selected index changed event. Display the current selected name on screen
Note: give me code guide how can done 1 to 5 step.
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Jun 1, 2010
I've been quite impressed with dynamic data and how easy and quick it is to get a simple site up and running. I'm planning on using it for a simple internal HR admin site for registering people's skills/degrees/etc.
I've been watching the intro videos at www.asp.net/dynamicdata and one thing they never mention is how to handle concurrency control.
It seems that DD does not handle it right out of the box (unless there is some setting I haven't seen) as I manually generated a change conflict exception and the app failed without any user friendly message.
Anybody know if DD handles it out of the box? Or do you have to somehow build it into the site?
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Jan 28, 2011
I'm trying to learn MVC and I'm playing around with the MvcMusicStore tutorial.I'm trying to modify the StoreController to change some of the behaviours.I'd like to change the route behaviour from:
[Code]....
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Nov 26, 2010
I added by client form elements to capture values at server.
[Code]....
How I get values theses inputs at Post?
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Oct 28, 2010
I have an aspx webpage in which an user control is added dynamically as follows:
UserControl testUsrControl = LoadControl("TestUsrControl") as UserControl;
testUsrControl.ID ="test";
Then I tried adding an event handler of user control inside aspx like below:
testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged);
But this line is giving error at **testUsrControl.Drpdatafield_SelectIndexChanged **. The error is "Drpdatafield_SelectIndexChanged" doesn't exist in UserControl.How can get the testUsrControl's events inside aspx page dynamically.
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Jan 1, 2011
i need to dynamically add HTML codes that contains some asp.net controls.
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Jan 12, 2011
I have the following client side code in .aspx page within a datalist itemtemplate that takes questions from the database like this:
[Code]....
The output is like:
1) What is your age group?
- Option 1
- Option 2
- Option 3
- Option 4
The ID's of the radio buttons are dynamic ("Q" & QuestionID). If there is no answer to a question then the GetVisible function returns false and the containing panel is hidden.
I have been trying to get rid of the html and replace these with asp:radiobuttons but it is not possible to set id's from databinding.. only simply. I was trying something like:
<asp:RadioButton ID="Q<%#Eval("ID")%>" runat="server" Visible='<%#GetVisible(Eval("OptionA").Tostring())%>'
Text='<%#Server.HtmlEncode(Eval("OptionA").ToString())%>' />
Here is the function that provides data:
[Code]....
but I'm finding it impossible to work with the html controls, i.e get their .text value from codebehind, or adding events!
better way to replace the html with suitable asp.net web controls or from the codebehind and output it. Or point me in the right direction?
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Mar 24, 2010
Well i am a sort of a beginner..
I am writing an Application using mvc and c#..
Well i have a View where i have the following code..
[Code]....
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Feb 20, 2010
I have a requirement that user can input HTML tags in the ASP.NET TextBox. The value of the textbox will be saved in the database and then we need to show it
on some other page what he had entered. SO to do so I set the ValidateRequest="false" on the Page directive. Now the problem is that when user input somthing like :
<script> window.location = 'http://www.xyz.com'; </script>
Now its values saved in the database, but when I am showing its value in some other page It redirects me to "http://www.xyz.com" which is obvious
as the javascript catches it. But I need to find a solution as I need to show exactly what he had entered. I am thinking of Server.HtmlEncode. Can you guide me to a direction for my requirement
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Feb 11, 2011
I am trying to create a composite control - A textbox, gridview and a button. When I create the grid dynamically, I use my function GridViewDataBind() that will basically create the gridview at runtime and bind it with data. In this method, I add a blank column (first column for expand/collapse image), databound columns (using custom Itemtemplate), a placeholder, then a new html row/cell and a child gridview. I want to know how can I add these html rows/cols to my gridview. Here is the code:
[Code]....
Not sure if the approach is right and if I was able to explain my problem?
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Oct 25, 2010
i have an scenario where i have to perform some action according to selection of the
dropdown .
for basic refrence you can use the example of country,state,city.
i am able to populate the country list at that time i have set the other two drop downs to
disable.
after the countries are populated i want to select the state.it is getting populated .
two problems
1) how to retain the state of country ddl as it is coming back to its orisnal state.
2) how to enable the drop down through my controller.
[code]....
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Jan 14, 2010
I've a controller with different actions that calls the DB code and return result. I want to pass the value of text box to different actions in controller.
How to do it? I know that, I can pass values by using form. But, I don't to know how to call different actions in controller from single view.
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Oct 16, 2010
I am trying to display Html.Actionlink through controller(MVC). Here is the example what am trying to do...
public string test(){
string testString = "<%: html.ActionLink('click', 'test', new AjaxOptions() { UpdateTargetId = 'test' }) %>";
return testString;
}
i want to display testString in view. but am not getting the actionlink in view..i can display anchors which is given below:-
public string test(){
string testString = "<a href ="test"> click here</a>";
return testString;
}
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Oct 4, 2010
I pick up on the nerddinners examples, following Professional.ASP.NET.MVC wrox book. but now i'm doing some modifications for my own account. On traditionl ASP.net it was possible to interact with html elements (divs, textbox, etc... )On MVC 2 is that possible or any interaction with html must be done with jquery and how? Because i'm trying to manipulate an html element on my Controller page(DinnerController.ASPX and i had no reference to html div, as i initially supose.
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Feb 17, 2010
I can't find the namespace where it's stored - in the view code I can execute Html.TextBox(<name>, <contents>, <html attribs>) and Html.DropDownList(<name>, <select list contents>, <html attribs>) but how do I execute these methods in controller code?
In case you are wondering why on earth I want to do this, rather than using the TextBox object, I execute Html.TextBox(....).ToString() and create html code from these objects.
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Mar 2, 2011
Is there anyway I can handle both json and html return types when posting jquery ajax:
For example, this ajax call expects html
[code]....
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Dec 28, 2010
UML and Patterns: An Introduction to Object-Oriented Analysis and Design and Iterative Development, that follows the UP(Unified Process). It uses a Grasp Controller pattern to interact with domain classes by some methods like NewSale(), AddNewItemToSale() and CloseSale. In windows form, I can instantiate a object of this class in the UI and then use its methods to perform the actions. This works well in Client apps, but when I use asp.net mvc, I cannot find a way to instantiate an object (one for each user) that was always visible for a Controller (MVC). I cannot insert as an attribute inside Controller because it always create a new one.
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Aug 12, 2010
In the view I have a HTML button:
<input type="submit" value="Submit" />
Also I have a dropdownlist, how do I call the controller's action after I click the "Submit" button?
And how do I pass the Model back to the controller action as well?
The reason I want to pass back the model (or other object/class) to controller's action is I might have 5 dropdown lists and 3 edit boxes values to be sent as parameters. So I would like to assign these parameters into a object and send it back to controller's action.
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Dec 15, 2010
I have a HTML table (grid). I want to pass the html table data to controller.(mvc 2.0)
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