DataBind Versus Setting Control Properties
Nov 9, 2010Regarding these two approaches:
<asp:Label ID="Label1" runat="server"><%# DateTime.Now %></asp:Label>
and
Label1.Text = DateTime.Now.ToString();
Which do you use and why?
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C# - Setting Custom Control Properties?
Apr 20, 2010I though it would be very simple but I can not get it today.I have a user control, with a grid control contained in it.
public Unit Width
{
get
[code]...
Web Forms :: Dynamic User Control And Setting Properties?
Jan 25, 2011I have a user control (i.e. ascx) that comprises of two related list boxes (i.e. once you change the selected item in one list the contents of the other list update). I'm adding this user control dynamically to a page on the click event of a button (i.e. using LoadControl).I wish to set the list box datasource properties, as well as the default selected item of the parent list from my parent page so I created public properties in my user control to accomodate this. I also created an event in my user control that notifes the parent page when the selected item changes in one of the list boxes so I can update the contents of the other list box.
I understand that I have to recreate the user control on every postback in order for it to function correctly but I'm not sure exactly how I should be doing it. I've shown below what I have currently - whilst it works the problem is that on postback I'm always creating the user control with all its default properties and then updating the properties that need to change(?). For example, when the choice in theparent list box changes the datasource of the list box is set twice (once in AddControl and then again in OnParentChanged)? As the contents of the list boxes originate in a database it means I'm making unnecessary calls to the database (unless I do some something like store each unique set of data in the ViewState).
I'd be very grateful if someone could review how I've done things and illustrate how perhaps I should be doing things. I'm not sure if the way I've done this is considered the 'correct' way. For example there may be a better way of doing things would avoid setting the properties twice? I'm a bit unsure of the way I've set the datasource properties of the list boxes and bound them. I wished to set the datasource from the parent page because I might have a second user control on my page that may also use the same datasource and I could reuse it (as opposed to each control making its own call to the database) so I'd like to keep this feature if possible.It would be great if posting code in reply that you use my example as a guide so I know what you're referring to.Here's the code for my user control:
[Code]....
[Code]....
Here's the code for my containing page:
[Code]....
Web Forms :: Finding Control Id And Setting Properties In Other Pages?
Oct 23, 2010im using a webusercontrol (hide.ascx) it has 2 buttons btn_hide,btn_expand
and in my other forms of all like(products.aspx)customers.aspx,orders.aspx
im using a panel conrol(pnl_products) where in im placing all the input controls.
i want to find the panel control in hide.ascx page and to set that
panel.visble=true/false property in this page.
Web Forms :: Setting Properties On A Dynamically Loaded Control As Template?
Jan 6, 2010[Code]....
Once the template is loaded and cast back to the TabHeader class, it's null. How can I load that control, set the properties, and use it as the template? Or is the only way to go about doing this to create a custom class?
Forms Data Controls :: Setting Properties On Web User Control In Dynamic GridView
Jan 7, 2010I am in need of some assistance in regards to how to best set the values of properties for a Web User Control which is being included into a cell of a GridView with dynamically created columns. I have tried a few different approaches, but can't seem to get a satisfactory result. Also, to be completely honest, I am not really sure if I am using best practices for what I am trying to accomplish.
First off a little background:I have a GridView for which we will never know the exact number of columns at run time. The columns are predicated by user selection. I am creating the command text for the DataSet on the fly and then looping through the columns of the resulting DataTable in order to use custom TemplateFields. This works ok for just printing out the row values but not so much for when I need to insert the Web User Control into a cell.The Web User Control is in essence a collection of image links which are used as a "Quick Nav" tool. I need to pass the values of 2 fields from each DataRow to the control via properties (for example, CustID and ProductID). I am using custom TemplateField classes inheriting from ITemplate for displaying my fields and extending the DataBinding event like so: [Code]....
This won't work for my User Control as DataBinding is called after the control is loaded into the page and I need the properties to be set before the Page_Load event of the control is fired.Is there a GridView event I should be looking into instead such as RowCreated or RowDataBound? Or should I modify how I loop through the DataTable by doing rows first, then the resulting columns as I've seen done elsewhere?
Properties Versus Parameters
May 21, 2010you have a class and the class has a function that returns a dataset. If the function requires a few values to return data how do you determine whether you create parameters for the function or create private fields and get and set properties and just call the properties get functions?
Properties option
private x as integer = 0
function getX()
return x
end function
function setX(xValue as integer)
x = xValue
end function.......
C# - Databind To Fields Instead Of Properties?
Jul 29, 2010I'm getting a List back from a WCF service and I want to set it to be the datasource for a grid. When I databind I get the error that "Deviceheader" is not a property of someObject.
<td><%# Eval("Deviceheader.DeviceID") %></td>
That is true, it's not a property, it's a public field
public class someObject(){
public DeviceHeaderDc Deviceheader;
}
How can I databind to these fields since they are not implemented as properties? Any suggestions? I'd like to avoid writing wrapper objects with property implementations if at all possible.
Forms Data Controls :: Databind - Change The Default Value Setting In InitialCall From (getdate())
Oct 18, 2010Using Microsoft Visual Web Developer 2010, I have created a SQL database, with the goal being to create a Lead Management system for my company. I have created two columns: 1 is named InitialCall, and the other is named FollowUp. The InitialCall column has a datatype of "datetime", and currently, the default value setting is (getdate()). The FollowUp column is set to varchar(max), because I want to allow a sales rep to add whatever information they want to.
What I would like to do is change the default value setting in InitialCall from (getdate()), so that it will update that field whenever a sales rep upates the FollowUp field. In essence, this would create a time stamp so that I would know the date and time that the sales rep followed up with a particular lead. What would I enter the default value as?
Web Forms :: Setting Page Properties From Itself?
Oct 8, 2010Is there any easy way to set properties of a Page (or UserControl for that matter) from *within itself*?As an example, I have several .aspx pages which inherit from exactly the same code-behind class, but I need to be able to pass different properties to the class to make them do the correct thing for the specific .aspx.
The only way I've found to do this is to create the following - which works fine, but doesn't feel right....
<script runat="server">
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
Me.MyProperty = True
End Sub
</script>
It would be a much nicer, simplier and easier solution to be able to be able to set MyProperty = True somewhere... is this possible?The option of hard-coding properties within the class for the "parent" page is not going to work for my situation.
Order Of Precedence In Setting Properties?
Feb 4, 2010Some settings in asp.net like viewstate can be controlled at the site (web.config), page, or control levels. What is the order of precedence? What happens, for example, if I set viewstate of site and page levels but on at the control level?
Also, is viewstate for a control the same as control state? Furthermore, what events to use for loading and saving viewstate for controls (is this the same thing as control state?) and also for custom controls?
Similarly, which events should I use to render controls? Is this PreInit and Load? Is this the same for custom controls?
Intellisense When Setting A Value On Custom Properties
Dec 6, 2010I have the following property:
[Code]....
I want to be able to have the user see the available options when they try to do something such as DateRange = .... (i want intelllisense in here and I can set the values). Is this a possible functionality? I am using VS 2008 .NET 3.5
Web Forms :: Setting Properties During Design?
Jan 15, 2010i have a WebControl class called ContentFrame that has a Header property and a Content property.
public WebControl Header {get; set;}
public WebControl Content {get; set;}
Now let's say that I have form x and ContentFrame is on the form. What I want to do is be able to set the the Header and Content properties during design time in the source
<cc1:ContentFrame ID="ContentFrame1" runat="server">
<Header>
<WebControl></WebControl>
</Header>
<Content>
<WebControl></WebControl>
</Content>
</cc1:ContentFrame>
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View 1 RepliesWeb Forms :: Setting The Properties Of USerControl From Values In C#?
Dec 15, 2010I have some user controls which have properties which need to be set from a form on the page
<uc1:MyPlugin
ID="MyPlugin2"
runat="server"
Property1="Hi"
Property2="0" Property3="<%=Property3%>"
Property4="<%#Property4
%>"
/>
Property3 and Property4 anre both public properties of the page I am on and the user control
Currently the code complaing about Property3 saying it cannot create an object of Int32 from '<%=Property3%>' and Property4 always gets set to 0 (the default)
I do not wish to use the c# code to set these values as this Plugin will be deployed with a CMS which I have no control over
Setting Values For Invisible Fields / Properties In DetailsView?
Mar 16, 2011I have a DetailsView which has two fields - one that is visible, one that is not. The first the user fills out, the second I want to auto-populate. Unfortunately, I haven't been able to find a way to set the value in this second invisible field. I've tried adding code like this to the Page_Load:
If Not IsPostBack Then
DetailsView1.DefaultMode = DetailsViewMode.Insert
Dim txt1 As TextBox = DirectCast(DetailsView1.FindControl("Type"), TextBox)
txt1.Text = "administrator"
End If
But this returns an error of "Object reference not set to an instance of an object." how to accomplish this - either using the method above or another method? The hoped for end result is that when a new record is inserted via the DetailsView that this record will include the username (entered by the user) as well as the "type" of "administrator"
Web Forms :: Setting Properties Within BasePage Class Not Working?
Jan 11, 2010We are trying to use a BasePage class (which inherits from Page) to populate and set the Meta Keywords and Meta Description Tags. I am using masterpages and below is an example code extract... According to examples on the internet, I could then set this also via the Page Directive using the MetaKeywords and MetaDescription properties, but they do not appear.
I have tried setting the CodeFileBaseClass="MyNamespace.UI.BasePage" but this does not work either. Using debug I can see that the BasePage classes' MetaKeywords and MetaDescription properties are not being set within my content page. I can access the properties but not set them.
== BASEPAGE CLASS ==
[Code]....
== PAGE CLASS ==
[Code]....
Forms Data Controls :: Setting Properties From A Database?
Oct 4, 2010I have a database which holds the path of an image. It also holds the recomended height and width of the image. My question is how can I set the height and width properties from my database? I have tried the following with no avail:
[Code]....
DataSource Controls :: Setting Common Properties For An ObjectDataSource?
Nov 7, 2010In my ASP.NET application I am using a lot of ObjectDataSource controls. I want to set the following three properties globally for all ObjectDataSource controls:
EnableCaching="true"
Forms Data Controls :: Setting Bound Field Properties?
Mar 11, 2011eI am using themes to set the Gridview font size and font name. I need to set the boundfield to the same font and size as I want it to be application to all the columns in gridview. How can I specify the boundfield properties in the themes.
View 8 RepliesConfiguration :: Deploying Versus Releasing Versus Implementing
Sep 16, 2010What is the difference between; Deploying an application Releasing an application Implementing an application
View 1 RepliesApplication_Start Versus OnInit Versus Constructor?
Jul 23, 2010I've gone rounds with this ever since I started programming classic ASP 12 (or so) years ago and I've never found a great solution because the architecture of ASP and ASP.NET has always been a swamp of bad practices, magic shared singletons, etc. My biggest issue is with the HttpApplication object with its non-event events (Application_Start, Application_End, etc.).
If you want to do stuff once for the entire lifespan of an HTTP application, Application_Start is the obvious place to do it. Right? Not exactly. Firstly, this is not an event per se, it's a magic naming convention that, when followed, causes the method to be called once per AppDomain created by IIS.
Besides magic naming conventions being a horrible practice, I've started to think it might be a reason there exist no such thing as a Start event on the HttpApplication object. So I've experimented with events that do exist, such as Init. Well, this isn't really an event either, it's an overridable method, which is the next best thing.
It seems that the Init() method is called for every instantiation of an HttpApplication object, which happens a lot more than once per AppDomain. This means that I might as just put my startup logic inside the HttpApplication object's constructor.
Now my question is, why shouldn't I put my startup logic in the constructor? Why does even Init() exist and do I need to care about Application_Start? If I do, can anyone explain why there is no proper event or overridable method for this pseudo-event in the HttpApplication object?
And can anyone explain to me why in a typical ASP.NET application, 8 instances of my HttpApplication are created (which causes the constructor and Init to run just as many times, of course; this can be mitigated with locking and a shared static boolean called initialized) when my application only has a single AppDomain?
Web Forms :: Databind() In Gridview Does Nothing In IE / Databind Doesn't Show The Updated Grid
Mar 21, 2010 i'm opening a new window and passing on to it variables in a querystring, the values are loaded into a function that is filling my dataset and then filling my Gridview. after i press the button field in my grid to delete an item, the databind doesn't show the updated grid but remains the same. i've noticed that if i navigate back and refresh i see it correctly. in FF btw no problem.
the code:
this is used to open the new window
[Code]....
[Code]....
[Code]....
[Code]....
C# - Programmatically Databind A GridView Control
Sep 27, 2010I have a blank/unbound GridView control on my form and I am binding it in the code behind like this:
GridView1.DataSource = _dataSet
DataBind()
Running this code populates my GridView control with all the columns and data that _dataSet has. I want to display only some of the columns, change the column names, and rearrange some of these columns too (i want the last column from the actual sql database table to be displayed first in my GridView).
Repeater Template Sub - Control Visibility Before Databind
Jul 1, 2010I have a custom control which contains a Repeater control. The Repeater has an ItemTemplate. Inside that item template I have a panel which is going to hide something based on "IsEditable" a boolean property of the custom control. What I would like to do is set the panel's visibility once before the Repeater is databound.
I know I could do an onItemDataBound event and use FindControl to get the panel but that seems a little excessive since it will always be either visible or not for all rows and I have no other actions that need to occur on databind. Is there a way to find the control in the ItemTemplate before the Repeater is databound?