C# - Passing QueryString Into Another Entity Framework Page?
Mar 22, 2011
I have a web form (Page1.aspx) in which I am passing an ID as query string to another page (Page2.aspx). Now in this page I have EntityDataSource which binds to GridView. How should I populate this gridview with that ID?
Eg. If my ID is 1056, then in my DataGridView in Page2.aspx should populate elements of this ID.
This is the code:
protected void Page_Load(object sender, EventArgs e)
{
string getEntity = Request.QueryString["EntityID"];
int getIntEntity = Int32.Parse(getEntity);
if (getIntEntity != 0)
{
//What should I do here???
}
}
I need to check if any rows are returned in a QueryString here's what I have so far.not sure what code to put to see if the row count is greater than 1
private void BindDataToGrid() { //MessageBoardEntities3 is ThemeableAttribute connection string name int TID = Convert.ToInt32(Request.QueryString["ThreadID"].ToString()); // if Post ID is int var context = new MessageBoardEntities3(); gvPosts.DataSource = from p in context.Posts where p.ThreadID == TID select new { p.Post1, p.PostID }; gvPosts.DataBind(); lblNoPosts.Text = "No posts found for this thread."; }
Is there a way to export a EF 4.0 Data Model to EF 3.5?
I looked around and found that we are not able to access EF 4.0 from a ASP.Net 3.5 project here: [URL]
Our project is the 1st to go to .Net 4.0 using Entity Framework and we (the team) were wondering if there was a way for the other projects that "might" need to access our data that are still using the .Net 3.5 framework.
Can we pass querystring in the same page?? if yes then how ?i am using Tab Container control of AJAX Toolkit and in that i have 5 tabs all of them gets the value through querystring from another page but i want to pass different querystring to tab no 4 so for that i am trying to pass another querystring on the same page on TabContainer1_ActiveTabChanged event.i give another querystring to tab no 4
Looking for advice on passing variables from page to page without using QueryString. The web crawlers such as google get caught up on the querystrings found in a URL. I'm trying to get away from using it. Is there another suggested method for passing the variables? I've thought about using session variables, but this is just for simply passing the variable from page to page and they won't always be the same.
On another note, I can't do it using forms. I'm using a master page with a form embedded in the master page and also the content pages. Unless microsoft updated it so you can multiple forms on one page.
I am new to entity framework , it is really very good , but I want to know what is the difference between using entity framework with stored procedure or without stored procedure , which one the faster and what is the benefits for using stored procedures with entity framework.
I have an EDM, it includes the entities extension and history. My goal is to use history to keep track of all the changes made to extension entity. For example, if extension with ID 223 has its property 'Name_Display' changed - I want the history entity to record this.
I'm using ASP.NET with VB.NET. Where in my code do I put the hook to say, "update the history entity" and what should that hook look like?
When I use classical ADO.NET or (which is interesting) EntityDataSource (e.g. for GridView), then page load within 1 second.But when I use ic codefile code like:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Cty = CType(Request.QueryString("cty"), Integer) ' course type Page.SetFocus(ddl_FGPhotosOK) If Not IsPostBack Then ' read course status Using ctx_sdbEntities As New sdbEntities() [code]...
We do have a search page for customers which returns a list of data from a table.
Once we select on an item it should redirect to another page with customerId as a querystring parameter..
Now the problem is we have to save all the customerIds and need to send them to display page..and need to select next one once they done with previous one without going to the search page again..
Example:
if they got 10 customers in the search page then we need to send all 10 ids to display page by starting display of firstone and once they select next button on display page they have to move on to the next cutomer from that list..if they reached the end of list they have to start again from the first...we need to avoid the user going to the search page for each customer every time...
I get an cast exception when i am trying to insert an entity in Entity Framework (using code-first). From this code :
public virtual T Insert(T entity) { return Context.Set<T>().Add(entity); }
The cast exception is like "impossible to cast ...Collection'1(Entity) to type (Entity)" I can't figure out why. I am pretty sure ive done everything right. Post entity
public class Post { public long PostId { get; private set; } public DateTime date { get; set; } [Required] public string Subject { get; set; } public User User { get; set; } public Category Category { get; set; } [Required] public string Body { get; set; } public virtual ICollection<Tag> Tags { get; private set; } public Post() { Category = new Category(); if (Tags == null) Tags = new Collection<Tag>(); }................................
I am mapping a stored procedure to an entity by right clicking on the entity (in the .edmx) and selecting "Stored Procedure Mapping." This brings you to a Mapping Details - "Name of Entity" Window that allows you to select the insert, update, and delete stored procedures associated with the Entity. It also maps the stored procedure parameter to the Entity "Property" (Column).
I'm gettin an error "error 2042: Parameter Mapping specified is not valid." The cause of the error is fairly obvious, in the Insert stored procedure that has been selected, a 'CHAR' parameter is being mapped to an Int32 Entity Property. I altered the stored procedure parameter to match the entity, I deleted the stored procedure, readded, and reslected it as the Insert function. I also cleaned, validated, updated model from database. No matter what I do, the parameter list in the mapping details doesn't reflect the change to the stored procedure. It's stuck on a char --> int32 mapping, even though it has been changed, like it's buried deep in meta data some where.
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 have a stupid problem with the Entity Framework. I get the following Exception:
[Code]....
I have an entity with a 4 fields representing the primary key. I copy it via serialization (works fine). I set the old entity to not valid (Datefield set to a date in the past, this field is part of the PK) and set the copied entity to DateTime.Now.Date. When I call context.AddObject I get the Exception above. I tried copying the entity via reflection but the entity has 3-4 references. And when copied, I get another Exception before even Adding the entity to the context. I also tried setting newObj.EntityKey = null and reset all the fields neccessary for the PK. I just want a whole copy of an entity with a different primary key (and some other fields changed too) and Create it in the database.
I'm writing a custom .NET MembershipProvider (not the built in one) and trying to update using Entity Framework. But of course i have no access to (Try)UpdateModel. How can i update it?
I have an Events table and an InstallmentPlans table. The relationship is 0..1 : an Event can have 0 or 1 Installment plans. If I want to remove the existing InstallmentPlan for an event, how do I do this? Setting it to null doesn't seem to work:
Here's a simple code snippet where I create a new Entity object and call SaveChanges() to create a new record in the mapped database table.
[Code]....
What I'm trying to figure out is whether there is a way to derive this new key for my entity, e, from the ObjectContext, m? The reason for this is that the way my actual code is structured, my entity object is already out of scope at the point where I call the SaveChanges() method.
But ofcourse it is not working as I want to. The Ordering works on Question.Order, but I would also the Questions.SubQuestions List to be ordered according to SubQuestions.Order
Passing Variable from page to page using ASP.NET (C#) without using QueryString
The difference in my case is that the request is coming from a different website (in java) to my website (in asp.net). I do not want the variable to appear in url.
To explain my scenario, we are making a webpage(plugin), which can be called from any other website. To authenticate request, i am looking for a mechanism when other website will pass id & auth-key to my page. This i can use to authenticate the request. I do not want these variable to be visible.
I have a datalist that I want to list the Products that are comming from the Querystring. It works like this: Default.aspx/?ProductID=1 I get 1 product like I want.But I want to add more products like this Default.aspx/?ProductID=1,15,25 and get three products back. How do I make that to work?
This may be a simple question, but I'm trying to call a a value from table in my back-end SQL Server database and pass it through a querystring in the URL. For example:
I'm building a mobile web site that registers a mobile device to an account on the sign up page. After the database entry is created, I want the to get the generated deviceId from the database and pass it to a querystring in the URL such as: http://www.mobilewebsite.com?dId=22
Is this easily possible, or is it even the best solution for what I'm trying to accomplish?
I am trying to pass a URL Querystring to a custom assembly. How can I accomplish this. I need to store the querystring value into a parameter, but it has to be decrypted (This is what the custom Assembly does). I have tried to first put it into another parameter and then call that using=Code.MyClass.DecryptMe(Parameters!Eq.Value)But it doesn't get any value from the Eq parameter. how can I accomplish this?What is the best way to get the Querystring into the custom assembly
