MVC 2 - Name Attributes On HTML Input Field When Using Parent/Child Entities?
Apr 21, 2010
I'm pretty new to MVC 2 using the Entity Framework. I have two tables Company {ID int identity PK,Name nvarchar} and User {ID int identity PK,UserName nvarchar,CompanyID int FK}. A Foreign Key exists between User and Company.I generated my ADO.NET Entity Data Model, a Controller and a view to insert a record. My HTML form has the fields Company and UserName and the is when I click save a Company and User is inserted into the database. Sounds straight forward right!
My question is as follows:
I created a strongly-typed view derived from my 'User' entity. I'm using the the html helper Html.TextBoxFor(model => model.Organisation.Name) but the html name attribute for this input field is 'Organisation.Name'. My problem with this is that the dot throws up all sorts of issues in JQuery, which sees this as a property. If I want to change the name I read that I can use DataAnnotations but because I used the Entity Designer this involves using Buddy Classes. Seems like a bit of overkill just to change the html name attribute on this input field.
i am working on POCO entities. i had a requirement to provide Edit feature for parent and respective Child records in single View.
Eg: Parent-Customer, Child-Order tables
when updating the parent entity by using => UpdateModel(CustomerIns);
and updating the child entity by using => TryUpdateModel(CustomerIns.Order, "Orders");
The Child Controls Names are like Orders[0].OrderID,Oders[0].OrderDate,etc
The Parent and Child Entities are updating when UpdateModel() is called but when saving Changes by calling Context.SaveChanges() i am getting exception like:
"The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted."
Simple and blunt: my cascading dropdownlists clear when a postback occurs. Does anyone know a quick way around that?For more information, read on...
I have 5 dropdown lists that define a training class location and line of business: Site, Parent Client, Client, Program, Project I'm trying to build cascading dropdownlists that can work from any direction (i.e. select a site and all other lists are filtered by site...select a project and all other dropdown lists are filtered by project). I've built the SQL Select statement behind the lists that filters (accurately).
In my ASP.NET main page I have one hidden field and and one button. When the user clicks the button I am showing the pop up (child page). I need to access a Hidden field while the pop up is loading. How could I access the Hidden field using c#?
I have an html input control that is a radio button. This radio button needs to disable required field validators when selected. This is my non working code so far. What have I not done?
I want to integrate paypal inside my shopping cart. For that it requires a html form to be embeded inside .aspx page with the action to paypal and method is post. Inside that form there are some hidden input filed. I want to assign one of those hidden field's value from server side code so i need to access that filed from server side. But how? Here is my form:
In my website I have two forms: parent form and child form(dialog box). Their expected behaviour is like this: if clicked on 'show' button on parent form, a dialog form opens that displays a gridview. In dialog form, if clicked on 'select' button it closes itself and returns value in selected row back to parent form.
To achieve this I write following code (.cs) : in parent form:
void ShowBtn_Click(object sender, EventArgs e)
{
StringBuilder jScript = new StringBuilder(); [code]....
Now problem is: the code in parent .cs works fine, it opens the dialog properly. But when clicked on 'select', instead of returning back to parent, it opens the same dialog again in new window. This newly open window says "Done but error on page" at left bottom.
I'm trying to create a view that will allow me to create an entity record and also child entities for that record. I have an entity type called "Parent" and I have a child entity called "Child". I want to be able to allow the user to create a Parent including adding several Children and their details, and the npost them all back to the controller from a single view. I found an example on how I would kind of do something like this here: [URL]. The problem with that example is that you can't refer to entities using bracket notation so it only works for those lists. Is there a way to insert hierarchical entity data using MVC from a single view in a single post back?
I'm using ASP.NET MVC 2 and am struggling with saving child entities. I have an existing Invoice entity (which I create on a separate form) and then I have a LogHours view that I'd like to use to save InvoiceLog's, which are child entities of Invoice. Here's the view:
In the SaveHours action, it properly sets the values of the InvoiceLog entities after I call TryUpdateModel but when it does SaveChanges it doesn't update the database with the new values. Also, if you manually update the values of the InvoiceLog entries in the database and then go to this page it doesn't populate the textboxes so it's clearly not binding correctly.
My classes look something like this (I include only the relevant properties):
public class Order { public virtual Customer Customer { get; set; } public virtual IEnumerable<OrderLine> OrderLines { get; set; } } public class OrderLine { public virtual string Product { get; set; } // Simplified }
Now I What I want is to create a detached criteria that selects all orders for a given customer, and at the same time retrieves only the first 10 OrderLines for each order. The first part is easy:
Customer someCustomerObject = ...; var criteria = DetachedCriteria.For<Order> ).Add(Restrictions.Eq("Customer", someCustomerObject);
But how do I instruct NHibernate to retrieve eagerly the first 10 orderlines for each order retrieved by the criteria above?
I've tried using a Filter based on the following example (taken from Nhibernate documentation):
But when I give Order.OrderLines to the CreateFilter method, it retrieves all orderlines first, and then afterwards retrieves the 10 first orderlines, which is not what I want. I also tried combining this with a call to NHibernateUtil.Initialize to no avail.
How do I create a detached criteria for this problem? Or, if that is not entirely possible, how to I retrieve, for each order, the 10 first results only, without fetching the entire collection?
I've tried to override error message when input incorrect data type in input field on HTML form.For example I have the model like this.
public class Person { public string FirstName {get;set;} public int Age {get;set;} }
For view, I put text input for Age to get it value.When type some string in Age text box like 'test' and press submit button. I got this error message ,The value 'xxx' is not valid for AgeHowever, I want to change this message and try many way. There 's nothing effect this message value.
Is it possible to refresh parent page from child's child page using javascript.
I have a webform which opens a child window, a button on child window closes the present child window and opens a subchild window. Now a button on subchild should close the window and refresh the parent form.
I have a DetailsView on the page and I have made one of the fields a TemplateField. In the EditItemTemplate and InsertItemTemplate I have a DropdownList that is databound to a table in my Sql Server database. I wanted to add an initial value to the DropdownList namely "- select -" .
I set the AppendDataBoundItems property to true and added the initial value as a ListItem.Markup of the DropdownList
This works fine for new input. The problem is however that the database already has records that were entered through a Windows Application and many of these records has a null value in this field and exceptions are thrown when I tried to open these records and the system tried to set the SelectedValue of the DropdownList.After some more searching I found this help
This now solved the problem of opening a record where the value is null in the database, BUT now the RequiredFieldValidator is not validating anymore to make sure that a databound item is selected for this field and not the initial value "- select -". So basically now it is not checking anymore to see if valid input has been entered for the DropDownList and it accepts "- select -" thus it acts as if the field is not a required field anymore.
In short what is required is that I want to make sure that the user enters a valid selection in the DropDownList, but it must also cater for old records that do not have this field entered yet so that those old records can be opened in the DetailsView .Opening Old records (with null in that field):When these old records are opened in the DetailsView the DropDownlist should show "- select -" when the value in the database is null.
Saving records (old or new records):When saving the record in Insert mode or Update mode the RequiredFieldValidator should show that a valid input is not selected if the DropDownList is still on "- select -".
I have a nested child and parent UpdatePanel. The problem is, when the child UpdatePanel is refreshed/posted, the UpdateProgress in parent fires up. How can I prevent this? The structure is like this:
I am new to xml, i want to looping through the below xml and save the records in the database. the below xml is parent child combination, parts as to be saved under respective parents. if the source field is M then there will be child item for that.
In asp.net, I have a parent and a child control. Within the child control I have a dropdown list. Based on dropdown list's selected value I would like to toggle Visibility of Panel in parent control. For instance if I select Show in child control dropdown list, I need to pass true to parent control to make Panel visible and vice versa. How should I do that. I have read that can be done via the event handling and have seen certain scenarios but I am not clear on that.
When I open two modalpopups, one over another, there is unexpected order.After click on "Open Parent Panel", and click on "Open Child Panel",Child Panel (newone) is under the Parent. [URL=http://img820.imageshack.us/i/un1f.jpg/][IMG]http://img820.imageshack.us/img820/5836/un1f.jpg[/IMG][/URL]Uploaded with [URL=http://imageshack.us]ImageShack.us[/URL]What should I do to get it in "normal order"?The code is:
I am building treeview using asp.net 2.0/3.5 from master detail table.
ParentTable Value ---ChildTable Value ---GrandChildTable1 Node ---GrandChildTable1 Value ---GrandChildTable2 Node ---GrandChildTable1 Value
I have created something like this to populate node values. But I am not sure how to display GrandChildNode and values. Could you please let me know if there are any ideas?
protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e) { switch (e.Node.Depth) { case 0: GetParentTableValues(e.Node); break; case 1: GetChildTableValues(e.Node); break; case 2: } }
I want to create a listing view in which the record will be in this format(basically one record based on other, what mvc approach i should follow) .Basically i am using linq to sql and i have module and features in the same table with module being identified by is module =true tag . basically i am looking for suitable mvc approach. i could create a codebehind html table and rendered it here but that not i am looking for.
My table Module1 Module1Feature Module1Feaure2 Module1Feature3
I have a table that needs sorting by its hierarchial structure of parent-child.
An example of my table is below
ID Name Parent ID Sort Order 1 iPhone Dev 0 1 2 iPhone Lounge 0 2 3 Web Development 0 3 17 Javascript 3 1 24 CSS 3 2 25 prototypes 17 1
As you can see above, my table structure follows this pattern
[Code]....
My overall aim is to have the sql order the table for me, and by using this new "depth" column, I will be able to indent by categories in the menu on the front end, you have probably seen this before, but all the tutorials I have read dont really explain it very well, or assume you are sql savvy.
