Forms Data Controls :: Retrieve The Other Values In The Business Entity?
Jun 26, 2010
The method has a return type of collection<businessEntity>, i am calling the method from the aspx page in order to populate a drop down -> ddlDropDown. I am binding he DataTextField of the ddlDropDown with the BusinessEntity.Name and the DataValueField with BusinessEntity.Id, the business entity contains another id which is BusinessEntity.ProductId. I need to use the ProductId of the value selected in the drop down list in the code behind.
One possible way could be to call the method in the page_Load on the code behind and save the collection in a hidden variable and when required do a loop through in the hidden variable and retrieve the selected value Product Id.
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Jun 26, 2010
The method has a return type of collection, i am calling the method from the aspx page in order to populate a drop down -> ddlDropDown. I am binding he DataTextField of the ddlDropDown with the BusinessEntity.Name and the DataValueField with BusinessEntity.Id, the business entity contains another id which is BusinessEntity.ProductId. I need to use the ProductId of the value selected in the drop down list in the code behind.
One possible way could be to call the method in the page_Load on the code behind and save the collection in a hidden variable and when required do a loop through in the hidden variable and retrieve the selected value Product Id.
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Aug 10, 2010
I'm having a trouble figuring out how I am going to map my business objects. I found this little mapper using reflection with a little modification :http://www.simple-talk.com/dotnet/.net-framework/a-defense-of-reflection-in-.net/Above works fine and fill out my Business objects properly. But what if I have relationship on the Business objects class like for example :
[Code]....
then a User Class will have a relationship with Roles like :
[Code]....
Assuming there are columns on the database that have the RoleID, RoleName, UserID, UserName by Joining the 2 tables. The problem here is that the Mapper doesn't map the Roles properly since the Mapper will expect a Column Name "Role". I tried also inheriting the roles instead of instantiating it but it doesn't work either.I'm using a 3-tier Architecture (including a sublayer "Business Objects") and List<T> combo.
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Apr 26, 2010
I have a datalist that is bound to a table in the database. I need to have a button for each item. Then, when users click that button I want to be able to retrieve information about that item. I have done this with gridview, but cannot seem to get it to work with a datalist. The only reason I am using a datalist is because I am able to arrange the items how I want and not be forced to have columns.
The way I have it setup so far is
<asp:DataList ID="dlFeeds" runat="server" OnItemCommand="dlFeeds_ItemCommand">
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Feb 23, 2011
I'm populating a dropdown box bound to an sqldatasource. From the sqldatasource, I'm retrieving locationID,locationType and LocationName.
The locationName is displayed in the dropdown. The selected values is set to, "locationID'. Based on the 'LocationID' the user is directed to a new page.
However, I need to pass the "locationID" and also the "LocationTYpe" values for the selected Name, so the sure can be directed to a specific page..how do I get BOTH values, 'locationID' and 'LocationType' when the user selects 'Location NAme' from drop down.
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Jan 4, 2011
am using C# .net.. in my page am having nested repeater control.. in child repeater there is check box and a hidden ID. i want to store(here am get strucked) the ID of checked box in to my data base.. look at the below code..
HTML page....
[Code]....
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Jun 24, 2010
how I access /retrieve values of checkboxlist inside a repeater? My code is below..is it the same as if it was not inside a repeater? My other concern is how do I distinguish these checkboxes because basically what 's going to happen here is based on which checkbox is selected I need to query an xml file to get the location of a folder which I'm then going to zip up and allow user to download..So here's the breakdown. I have an accordion panel using jquery ui. Each panel hold a product and each product has the same checkboxes..so depending on which product the user wants to download files for which he/she will indicate by opening the accordion panel for that product and checking which checkboxes/file they want to download . So how will I know which product the user clicked the checkboxes for being that I'm using this repeater which just one ID?
[Code]....
can I still use this code or will it not work cause it's inside a repeater..also I was going to use jquery to add an onclick event to the checkbox so how can I do that now with me using this control?
[Code]....
Here's another issue..I can't even assign values to the checkboxlist using databinding..so how am I suppose to do this.. Server Error in '/ArchitectView' Application. Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Databinding expressions are only supported on objects that have a DataBinding event. System.Web.UI.WebControls.ListItem does not have a DataBinding event.Source Error:
[Code]....
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Jul 19, 2010
I want to retrieve and store(in an array) all the row values of a particular column in a gridview..i.e,if I have gridview with columns col1,col2 and col3, I want to retrieve rows of col1 by specifying col1..And,store all the rows in an array
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Aug 1, 2010
I have a datagrid whose columns are autogenerated (based on the results from an SQL SELECT query). However, I need to retrieve values from certain cells across the datagrid, using the following code to step through the results.
[Code]....
I need to specify all my columns using TemplateField?
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Jun 26, 2010
Question. Say for example if i have a business entity -> Customer, which has customerId, customerName and customerType. I have created an asp:Hidden Variable hdnCustomer to runat="server"
If i wanted to serialize the value of the customer business entity (in the code behind) to the hdnCustomer then how would i do that?
// Psudo code
Collection customerList = new Collection();
customerList = BusinessAccess.GetCustomerList();
hdnCustomer = serialize and assign the value of 'customerList' to hdnCustomer;
...
...
// Later on a select index change of one of the drop down lists
inside the event handler for the drop down list
{
Collection customerList = new Collection();
customerList = deserialize the value from hdnCustomer
int a = Convert.ToInt32(ddlDropDown.SelectedValue);
foreach(a in customerList)
{
// Do something
}
}
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Oct 23, 2010
i have the following code where I want to retreive the data form a table using entity framework and put it to a list of the same type:
List<ItemDetail> iDets = new List<ItemDetail>();
iDets = (List<ItemDetail>) from l in db.ItemDetails
where l.ItemID == varItemID
select l;
when I run the page, it throws the following error:
Unable to cast object of type 'System.Data.Objects.ObjectQuery`1[LIBRIModel.ItemDetail]' to type 'System.Collections.Generic.List`1[LIBRIModel.ItemDetail]'.
why i'm having this problem? or am I missing something here if i'm not wrong it worked once, but now it throws this error
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Feb 2, 2011
I have an ASP.NET application with existing business classes and a database schema. (which I would like to keep) Currently I am using ADO.NET for the DAL, but I would like to switch to some advanced technology there for easier data retrieval.
Is EF applicable to my situation? Can I use it without splitting up my business classes and auto code generation? Can LINQ to SQL solve my problem better?
All I want to do is map my existing classes to the existing tables and dont have to handle details of the data retrieval myself.
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Oct 8, 2010
I am playing about just now trying to teach myself a little bit about the entity framework. I have a Gridview data bound to a Entity Date Source using the Entity Framework. If I select certain items in that list I then wish to redirect another page and populate another gridview with just the items selected (but with more detail, different includes/navigation properties)
This is probably the most simple thing but I have spent 2 hours banging my head on the wall trying to get this to work. Essentially I have a continue button which when clicked should identify all the UIDs (a column in the gridview) of the rows and allow me to subset to just these rows and pass them to another page to be rebound to another datagrid
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Feb 18, 2011
In My page i have a ajax Combolist Box in which if i select any no it generates some controls
here is my code
[Code]....
[Code]....
[Code]....
[Code]....
Now i want to retrieve all the values Entered By the user in the textBox on btnSubmit_Click
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Jan 2, 2011
I use a ModalpopupExtender to show a dialog to the user which consist of a CheckBoxList control that is bound to a session table. The user can check/uncheck the CheckBoxList items and click the Ok control to close the ModalPopUp. How can I retrieve the values of the CheckBoxList items controls using JavaScript (seems like I cannot do it using server side scripting)?
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May 13, 2010
I know this has got to be the simplest-sounding question ever asked about ASP.Net but I'm baffled. I have a form wherein my visitor will enter name, address, etc. Then I am POSTing that form via the PostBackUrl property of my Submit button to another page, where the fields are supposed to be all re-formed into new hidden fields, then POSTed again to Paypal.
My problem is I cannot get at the values entered by the visitor in the original page. Any time I put in "runat='server'", ASP.Net completely changes the ID of the control, making it impossible to figure out how to access. In the POSTed form I tried Request.Form["_txtFirstName"] and that turned up null. Then I tried ((TextBox)PreviousPage.FindControl("_txtFirstName")).Text and that was null, too. I've tried variations on those. I cannot figure out how I'm supposed to get at these controls. Why does this stuff need to be so difficult?
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Mar 25, 2011
I'm currently writing an N-Tier architected ASP.NET system with a relatively normalised SQL database backend, but I'm struggling to get my head around how lookup values should be represented in my business objects (I don't get the priviledge of using EF or ORMs). My table (as an example) could be structured like this:
CoreDataTable:
ID | Name | Favourite_Colour
---|-------|-----------------
01 | Peter | 01
02 | John | 03
03 | Mary | 05
ColoursLookup:
ID | Colour | is_active
---|--------|----------
01 | Red | 1
02 | Green | 1
03 | Blue | 1
04 | Pink | 1
05 | Black | 1
Now initially, I had created my business object to look like this:
[code]....
I'm 100% convinced that I'm (a) overthinking this, and (b) making it more complicated than it needs to be. So, is there a preferred way of doing this? Or is there an option that I've overlooked?
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Feb 5, 2010
I've sucefully created a method to insert values through EF, but i've a question (maybe, a newbie question).
Should i send the values to be inserted as strings to the DAL, and then i create the object there or should i create the object in View Layer and then send him to DAL?
Example 1 (DAL):
[Code]....
Example 1 (View Layer, on a click button for example):
[Code]....
Or should i receive the strings in DAL like this: public bool NoticiasInsert(string tituloPT, string tituloEN, string descricaoPT, string descricaoEN)
Then i create the object cdcModel.noticias and set the fields there with the strings values.
What do you advice me to do? I know that both ways works, but i'm trying to develope with better patterns (i don't know if this is the exacly word, sorry my bad english)
cdcModel.noticias campos = new cdcModel.noticias();
campos.tituloPT = "a";
campos.tituloEN = "b";
campos.descricaoPT = "a";
campos.descricaoEN = "a";
if (DAL.NoticiasInsert(campos)
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Jan 28, 2010
<p>Dear All </p> <p>i am developing a small asp.net application in vs 2005. my application consists of 3 layers.presentation, business layer and data layer. now i got a small problem in using datagrid events like itemcommand , databound events in presentation layer. </p><p>this is my first asp.net application with different layers , upto now i dint work with layers. i created datagrid as follows in my page load i craeted an instance for my businesslayer as </p><p>
mywebsite businesslayer .customerinfo cs = new mywebsite businesslayer .customerinfo();
</p><p>
in customer info i have a function to bind the grid
</p><p>bindgrid(datagrid dg1, datatable dt)
{
dg1.datasource=dt; dg1.databind();
}
</p><p>
now i want to add itemcommand event ad databound events. can any one advice me how to add these events and where should i have to add these events? </p><p>
<p>p
</p><p>
</p><p>kishore</p>
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Aug 23, 2010
I have to pass the session value to a business logic layer, I can pass it to the function from presentation layer but how can I access it directly in my business logic layer ? Also is it a good approach to pass it directly to business logic layer like
GetMyRecords(Count,Session["userID"].toString()); ?
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May 6, 2010
Some ids are pulled out from the XML field of a certain User Profile . Those ids have their text values stored in a SQL table.
What is the best way to map that xml list to the SQL table in order to populate a dropdown list which contains ids from the XML list and text values from the SQL table?
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Jan 11, 2010
I am working on Edit operation for dropdownlist box using linq to sql in asp.net mvc.During edit operation i could retrieve it from database but i am not able to restore the selected value back to the database.
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Feb 7, 2011
After hitting the insert button the insert stored proc is run. if the record already exists then stored proc returns a specific value.I need to refill the details view textboxes with the values the user typed in.I am using the ItemInserted event handler.I seem to reference the control okay but the text doesn't change...even when I replace the command.parameter to just a literal text like "test".
TextBox tNPA = DetailsView1.FindControl("InsertName") as TextBox;
tNPA.Text = command.Parameters[0].Value.ToString();
So what am I missing. I also tried a detailsview1.databind() before and then tried after the above line and still no luck.
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Feb 18, 2010
I have a DetailsView (DV) control, an ObjectDataSource (ODS) control, and a button on a page. I have 2 classes in the App_Code directory (Customer and CustomerDAO). The DAO class provides static methods for the ODS control and simply hack values in (ie...no real database selects/updates). The Customer class has 2 properties (Id and Name) and a default constructor. The page takes an ID on the querystring and determines if the DV control is in insert or edit mode. If in edit mode, it sets the SelectParameter on the ODS (id field), calls ODS.Select(), and then calls DV.DataBind(). The existing (although fake) customer is loaded and display properly when this happens. I then change the name of the Customer in the DV and click the Button to save the new data.
Everything seems to be wired up correctly as the UpdateMethod that is specified in the ODS control is called and succeeds (even in my real example with my database). The problem is that the BoundFields in the DV control have not been updated with the new values and therefore the existing values are updated in the database and my changes are lost. I have handled the OnUpdating event of the ODS and the values are still the old values. I have also handled the OnItemUpdating event of the DV control and the NewValues IOrderedDictionary still has the old values in it also. In looking at the MSDN article for the UpdateMethod, it states the following:
Parameter Merging
Parameters are added to the UpdateParameters collection from three sources:
From the data-bound control, at run time.
From the UpdateParameters element, declaratively.
From the Updating event handler, programmatically.
I am using the BoundField classes in my DV control so I would have assumed that the first bullet above would have handled the updating of values, but it doesn't appear to work with the way I am doing it. If I set the values explicitly in the OnUpdating event that is fired by the ODS control (the 3rd bullet) the right values are updated (again...even in my real database situation). It seems like my only issue is that the automatic binding that I expect from the DV control isn't working as I would expect it to. Here is the code that I have in my fake example:
[Code]....
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Aug 27, 2010
I have the following code which creates a treeview of a folder and files on my PC. The front-end code is the following:
[Code]....
I have following in the code-behind file:
[Code]....
The result is a web page that allows me to navigate down to individual music files within various folders. Beside each music file is a checkbox.What I want to do is select several files and then click a button that will move the selected files from their existing location to another location. I'm running into two problems. One, whenever I add any control that performs a postback, the treeview doesn't repopulate. Two, I don't know how to retreive the values of the checked checkboxes.
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