Web Forms :: Reusing Class Properties Invoked In Masterpage In A User Control
Feb 2, 2010
I'm working on a project that uses a master page. When the page loads I'm calling a class (which I feed and ID into) to get back certain values for a location that the user has selected. Things like town name etc.
On the home page I have a user control which has some statistics for that location too.
Is there a way that I can get the user control to pull values from the class invoked by the Master Page (which has already been fed the ID, hit the db and pulled back the values), rather than creating a new instance of the class within the user control and having to supply the ID and hit the db all over again? This is now I'm calling the class in the masterpage. I have a method "CheckForStoredLocation" that goes off and gets all the data I need.
[Code]....
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Jun 13, 2010
Why i can't access MasterPage's public property (MessagePlaceholder) from other Class (Errors) ?Error compiler gives me is "Error 1 The type or namespace name 'MyMasterPage' could not be found (are you missing a using directive or an assembly reference?)"my master page code behind
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class MyMasterPage : System.Web.UI.MasterPage
{
public string MessagePlaceholder
[code]...
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Sep 28, 2010
I have some code like this. But imagine that there are hundreds of lines like this all duplicated across multiple functions.
MyClass.prop1 = doingsomething("test1");
MyClass.prop2 = doingsomething("test55");
I want to reuse my code... how can I do it?
I want to do something like this:
foreach(ClassInfo)
{
dosomethingAssignment(ClassInfo.propertiesToAssign[i], ClassInfoStringIPassedToFunctionInFirstExample[i]);
}
Maybe this isn't the way to do this in C#, but what is the best way to reuse my code?
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Nov 10, 2010
I have created a class within the App_Code called shared_methods.vb where I use methods that are frequently used within several pages.
I have a hyperlink control within the masterpage that i want to change the NavigateUrl depedning on what page. Just for better coding i would like to define the variable holding the hyperlink with my shared_method.vb.
I have:
Dim hl_back As HyperLink = CType(Master.FindControl("hl_master_back"), HyperLink)
This works within a page but not within shared_methods.
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Jul 16, 2010
I am using a custom membership provider. I want to expose additional properties under User class.
So in my custom membership provider class I added few Properties (FirstName, LastName, Address, etc) and set their value in ValidateUser(). However back in aspx.cs if I type User. I do not see FirstName, LastName and Address in intellisense.
Is what I'm attempting to do even possible? Or do I need to resort to using my own custom user class? In which case I wouldn't need to use custom membership provider because I can program my custom user class to do everything that custom membership provider can do. Only thing is I would need to pass this user object in session object.
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Nov 9, 2010
I want to use a couple of instances of the same control on a page. The user control is intended to display a list of records in a repeater. The aim is that the second control will show a list excluding the IDs in the first control The control has a number of public properties, including IDsInThisList, and IDstoExclude. The query will exclude the IDs in the second property.
What I would like to do is get the record IDs from the first instance of the control (IDsInThisList), and pass them to the second contro as the IDsToExclude.
I have a test page where I am setting the properties of the controls in code. As you might guess, it's not working! The first control displays the top 3 items, as desired, but the second display the records 1-7, rather than records 4-10 because it is not receiving the IDstoExclude from the first control When I response write the IDstoExclude from the first control in my testpage, the string is empty. (if I do it from within the control, it shows the IDs)
How can I get the controls to fire in order and pass values to each other?
Screen grab of test page + uc and test page code attached
[Code]....
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Jul 21, 2010
I have a unordered list in my master page....
<ul id="mainMenu" runat="server">
<li id="mainHome" runat="server"><a href="#" title="Home" class="home">
<span></span>Home</a></li>
<li id="mainManage" runat="server"><a href="Users.aspx" title="Manage"
class="manage"><span></span>Manage</a></li>
<li id="mainEnquiry" runat="server"><a href="account.aspx" title="Enquiry"
class="enquiry"><span></span>Enquiry</a></li>
<li id="mainReport" runat="server"><a href="EnquiryReport.aspx" title="Report"
class="report"><span></span>Report</a></li>
</ul>
From a content page i am assigning a css class to one of the list item.
HtmlGenericControl home = (HtmlGenericControl)this.Page.Master.FindControl("mainMenu").FindControl("mainManage") as HtmlGenericControl;
string cssToApply = "current";
if (null != home)
{
if (home.Attributes.ContainsKey("class"))
{
if (!home.Attributes["class"].Contains(cssToApply))
{
home.Attributes["class"] += " " + cssToApply;
}
}
else
{
home.Attributes.Add("class", cssToApply);
}
}
and my css,
#header ul li {
display:inline;
float:left;
}
#header ul a {
-x-system-font:none;
color:#FFFFFF;
display:block;
font-family:Trebuchet MS,Arial,sans-serif;
font-size:1.1em;
font-style:normal;
font-variant:normal;
font-weight:bold;
text-transform:uppercase;
text-decoration:none;
}
#header ul a {
-moz-border-radius:3px;
-webkit-border-radius:0.2em;
padding:3px 7px;
text-decoration:none;
}
#header ul a:focus, #header ul a:active, #header ul a:hover {
background-color:#829E7E;
outline-color:-moz-use-text-color;
outline-style:none;
outline-width:medium;
}
#header ul a.home {
margin:0 16px 0 17px;
}
#header ul #current a, #headermenu #current span{ /*currently selected tab*/
background-color: #BCE27F;
color:#666666;
white-space:nowrap;
}
#header ul a.manage,#header ul a.enquiry,#header ul a.report {
margin:0 14px 0 0;
}
#home #header ul a.home, #enquiry #header ul a.enquiry, #report #header ul a.report, #manage #header ul a.manage{
-moz-border-radius:3px;
-webkit-border-radius:0.2em;
background-color:#B9E27F;
color:#FFFFFF;
}
But i get the error, System.Web.UI.AttributeCollection' does not contain a definition for 'ContainsKey' and no extension method 'ContainsKey' accepting a first argument of type 'System.Web.UI.AttributeCollection' could be found (are you missing a using directive or an assembly reference?
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Nov 18, 2010
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Jul 18, 2010
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Aug 3, 2010
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May 15, 2010
i have a multiple user controls, each user control has multiple properties, i am loading those controls dynamically in my aspx page,i save the user control name in a hidden field in my aspx page,so i can know whats usercontrol are currently loaded,now i want to set/get some values for Currently user control properties,how can i know the properies available for that dynamics loads control ?also how to know the class for that control ?
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Mar 11, 2011
How to access userControl's properties, when use FindControl method?
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Jan 25, 2011
I 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]....
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Mar 19, 2010
I have a webpart that loads in a user control programmatically. Although the webpart has personalization properties that I can use and pass to the user control, I haven't found a way for the user control to be able to update the outer webpart's properties -- the user control knows nothing of its parent webpart except what it is given. When I try to use the [Personalizable] attribute on a property inside the user control, it doesn't work; it doesn't save anything to the personalization database. In a nutshell, I need the user control to be able to personalize its properties (e.g. for a date picker within the user control where the date has to be remembered between sessions) or to somehow be able to update its parent webpart's properties.
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Sep 15, 2010
With following code, I can fetch all properties of user control. I need to get only those properties which were separately defined excluding the default ones.
[Code]....
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Jun 12, 2010
In my application, I use nested master pages. In the main.master which is the top level, all encompossing master page, I have some properties. I want to set the value of this property from a user control embedded into the page which is using master page which is embedded into main.master. To clarify further, here's the hierarchy
main.master
content.master
some_page.aspx
myUserControl.ascx
The property is mpProperty1 which is in main.master. How do I access and set the value of this property from my user control?
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Feb 2, 2010
I have a Master Page that has several User Controls on it. The MasterPage code behind does some work to calculate a value that needs to be used in all of the UserControls. From the UserControl code behind, how do I access the public property of the MasterPage that I have set?
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Jun 12, 2010
I have a master page with a user control on it. How do I change the user control's properties from a content page?In my ascx file I created this 2 property:
[Code]....
In content page PageLoad event I wrote
[Code]....
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Feb 25, 2011
I have a simple user control(.ascx) with a asp label inside of it. Using the codebehind(C#) from a aspx page, how can I change the text of that label? I have tried using public classes in my user control and a few other things that I could think of off the top of my head. Can somebody give me a quick example of how this would be done?
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Jan 17, 2010
I have a little doubt about creating a login control in the master page within a contentplaceholder.
What i want is to create my own login control in the masterpage, using a loginview inside a contentplaceholder. The code is the following:
[Code]....
So far so good, but now i want to create the logic to do the actual login. In a regular aspx page i'll do it in the cmdlogin click event, but as i'm in the masterpage, i'm not sure if i can do that. I actually tried to do it in the code behind of the masterpage, but it didn't work. What can do?? do i ahve to use the asp.net login control?
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Aug 19, 2010
On my master page , I have "Search textbox" and "Search Button".
On My content page , I have a "User Control" which has a "GridView".It shows some data about Vendors.
Also, on this User Control's Page Load, i have code written to display all vendors in GridView.
Now, when user enters Vendor Number in "Search textbox" , and hits "Search Button" , i want to handle this event inside my User Control.
How to do this ?
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Jan 31, 2011
i am using .net 2.0 for developing my web app. want to modify a public property in the container page. how do i access the containser page?
[code]....
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Jun 24, 2010
I'm new to asp.net mvc. I'm looking to create some control for reusing HTML. I have a complex HTML box for example:
<div class="Box">
<div class="Top"></div>
<div class="Content">
<div style="padding:10px;">
[CONTENT GOES HERE]
</div>
</div>
<div class="Bottom"></div>
</div>
Previously using webforms I've been able to reuse this by inheriting from WebControl and override Render. But how can I implement this in MVC?
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Jan 7, 2010
I 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?
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Mar 13, 2010
Using the following Webservice definition using aClientArgs as a complex type:
[System.Web.Script.Services.ScriptService]
public class Controller : System.Web.Services.WebService {
[WebMethod]
public void save_client(aClientArgs client)
{
// Save client data
}
}
Then defining aClientArgs as a sub-class:
public class aArgs
{
public string id = null;
public string name = null;
}
public class aClientArgs : aArgs
{
public string address = null;
public string website = null;
}
Returns the following WSDL fragment for the save_client args:
<save_client xmlns="http://tempuri.org/">
<client>
<address>string</address>
<website>string</website>
</client>
</save_client>
When I'm expecting the following:
<save_client xmlns="http://tempuri.org/">
<client>
<id>string</id>
<name>string</name>
<address>string</address>
<website>string</website>
</client>
</save_client>
So it appears that the .NET WebService is not treating inherited properties as arguments/variables for purposes of a web service. How do I get .NET to also use the properties of the base class?
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