ADO.NET :: Entity Framework 3.5 / Select Category From Dropdownlist Bind Gridview To All Products Related To This Category?
Nov 5, 2010
i create example using Northwind database so i create a new website and add new ADO.Net Entity Data Model (.edmx) called Northwind.edmx and i add Categories and Products table inside this (.edmx) file
and add new ADO.Net Data Servuce called "ADODataService" and add it as WebReferences called NorthwindService
so i add new web page and drag DropdownList and Gridview as i want to bind Dropdownlist to all categories and when i select category from Dropdownlist bind Gridview to all Products related to this category
so my code
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and my code
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so when i select category from Dropdownlist nothing happen :(
also you will find commented code in method BindCategory whuch is not work also.
i want when user click in this item on jquery menu in Furniture.aspx will show all product in this item H_name is'nt important i want show all product with different H_name
've created a simple gridView which lists all products based on category within a dropDownMenu (select * where CatID = dropDownMenu).This works just fine, but is there a simple way to add 'Show All' in the dropDownMenu -
I'll try to explain as simple as I can in text what my problem is. I don't see any other way to make my issue clear.
I have a GridView that uses an ObjectDataSource.
The ObjectDataSource has an DataObjectTypeName defined, so I pass/get complete objects or list of objects to/from the data access methods.
The objects I'm working with, let's say we work with Book objects, contain a Title and a Category, BUT the Category is an object itself. When the Select method is called, we get a List of Book objects, which is perfectly displayed, overridden ToString method in the Category objects within the Book objects.
The problem I face is that I can't find a way to update the category in my GridView. What I did already accomplish is:I used a template field in the GridView for the Category so I could use a DropDownList for that field in Edit mode.
I bound the DropDownList to another ObjectDataSource that gives me a list of CategoryObjects.
So when I enter Edit mode... the row shows a nice ddl with the available categories. It even selects the right original category.
So far so good... but when I want to save my new selection, I get an error that a string (the selected category in the ddl) cannot be converted to a Category object (that's what the Book object, that is going to be used for the update, expects).
I am working in a project that is a musical website. I want to display the web page with all categories I have. In my database , named Category_Master, I have two fields like Category_Id (which is a primary key ) and Category_Name. I have generated category_Id with NEWID() function. The category_Id is not supposed to display on the web page. But, i have to select Category_Name and according to that , I have to get the category_Id. If I am using Static connection with SqlDataSource, i am able to make visible=false property so that the category_id won't be visible. But , at that time, I can't write code to Select the category_id of the selected index.
If i am using disconnected approach, I filled the dataset with the Category_Master, and binded it to GridView. But, at that time, I can't hide the category_id from the user. I want to select category_id by clicking on the category_name with out displaying category_id ..?
I'm working on an ecommerce project that is missing 5,000 product pictures.
I am trying to assign all products without pictures into a category located on a mapping table.
I know an insert can be accomplished from one table (or subquery) to another but I only need to find the product IDs and insert them with default values into the category mapping table that has all non-null columns.
The following code is the farthest I can get without help (I'm not strong in SQL), it won't work because my subquery returns many rows while the SQL statement is designed to insert one - I don't know how to handle this...
[Code]....
Any help would be appreciated from those more experienced than I. BTW... there are no known search results for this type of solution - if there is even a solution.
im creating advance search for my project and end up with the problem of select statement format for 2category.
here is example:
i have advancesearch that has checkbox wherein you can select multiple checkbox. example is selecting category, for example ihave 5 category as shown below.
Category
News Sports Opinion Editorial Literary i did tried someformats for my select statements to make it work for 2 or more category, but i just cant get the right format of the select statement.
example if i select the following.
if selected is category 'Sports'
it wil work with this: " 'Select * MyTable1 where [Category Title]='Sports' "
if selected are category 'Sports' and 'News'. what must be the format for my selectstatement for 2 or more category in the same fieldname? should it work with this?
" 'Select * MyTable1 where [Category Title]='Sports','News'" no, how could i make it work. what must be the right format?
I have a gridview displaying "registrationtype id" (FK) from the registration table. I want it to display the related name instead of the id from the registartiontype table.
I am trying to add a new entity and have to refernce associated data to add it. I cannot load the Referencetables. Giving "The EntityReference could not be loaded because it is not attached to an ObjectContext." How do i complete this task in Entity Framework 3.5
I'm working on a dynamic table of contents (toc). The toc is generated from data in a sql database. There are 5 sections in the toc and within each of the five sections, there are a varied number of rows. (Section 1 may have 5 rows, while Section 2 has 12 rows). To help differentiate between the sections, I'd like the ability to add some type of grouping in my gridview. So, it would look like below. Do I just add a different gridview for each section, or is there a way to "categorize" the gridview to break up the data with a Section 1 Category
I am using Entity Framework for my .NET application. I have been able to return objects and their directly-related objects as well (very convenient), but I am having trouble getting the objects of those objects.
IEnumerable<Lot> i = (((ObjectSet<Car>)_carRepository.GetQuery()) .Include(a => a.CarTypes).Take(10).ToList()
This works and I can access carTypes, however I cannot figure out how to access tables associated with CarTypes (e.g. tables which have fields associated with the car types). I tried to use a Join however I was unable to figure out how to get it to work right.
I use VS 2010 Ultimate. I created an 'asp.net web application' from scratch, added a 'ADO.NET Entity Model' to my project (EF4).
The problem I'm having is that whenever I try and use an EntityDataSource to pull data out of my entity model I am near constantly getting the following error:
"The metadata specified in the connection string could not be loaded. Consider rebuilding the web project to build assemblies that may contain metadata. The following error(s) occurred:"
I have this entity model>> http://img840.imageshack.us/img840/306/schemaj.jpg and I would like to bind a list which consists of: employee's
emloyee_firstname(employees table) + employee_lastname(employees table)employee's extension(employee_extension table)deparment name(departments table)to my gridview. I already created my stored procedure
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i don't know how to bind it since i don't have an entity that contains the employee's name, extension# and departments name. Do I need to create a custom class that consists of said columns? or is their a proper way to do this? I'm using vs2008 3.5 framework.
1. I have gridview which is bind with sql data source column name industry 2. I have checkbox list which has all industry name, 3. I want to pass checkboxlist selected value to sql data souce to filter data in gridview.
I have a gridview that has the following colums Category, Weight , and an option to delete row. I user would like to be able to highlight two columns in excel Category, Weight and then past them from clipboard to gridview.
How can I display Category Name? Do I have to add CategoryName into Item class and bind it on aspx page or is there something similar to Html.DropDownList?
I'm trying to add a product to one or more categories, but I'm going nowhere slow.
Table layout:
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I been trying everything to add a product to a category, but without luck. I would have though this was the "right" way:
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On my "Create" product page, the product is created but I just can't find a way to link a product to one or more categories. It just skips back to the Create page, even though I have put a Redirect in the Controller.
I just learned routing and basic routing works, like /topics/people but I am not having any luck implementing like topics/people/{id} or any other variable. It just won't show.
So how do I go and fill that id from a listbox? I googled and people did it without even doing any coding, or did they skip that step? my listbox is in my master page and content pages will use that listbox value in their url too. And then later on I'll add username and stuff too. so for now I just want to know how to set that variable to my listbox. This is what I have for testing:
I am buiding web application about news.My problem i need to change order of articles in that category. Example :
+ Article A ----> position 1 + Article B ----> position 2 + Article C ----> position 3 + Article D ----> position 4 + Article E ----> position 5 + Article F ----> position 6
All articles A -> F are inside category. Sometime i want to Article E is position 1, or article C in position 6 ...and so on Now i can't imagine what i have to do ?
