Custom Web UserControl (vs2008 C#) - "not A Known Element" When Placed?
Jan 15, 2010
I created (vs2008 C#) an "asp.net web server control" project. I then remove the default .cs and replace it with an "asp.net web server control" cs file which has a default name of WebCustomControl1.cs. I named the project CCContainer and renamed the .cs file as CCContainerA.cs, so the class name is CCContainerA. I then create a new (VS2008 C#) web application in which I add my custom control. After compiling CCContainer to CCContainerA.dll I create a reference to this dll in the web app, and add CCContainerA.dll to my web app's toolbox. When I drag my custom control to the webform I automaticall get this directive line:
[code]
[Code]
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Similar Messages:
Oct 12, 2010
In the process of migrating an old VS2003 web app to VS2008, I'm running into this issue and haven't been able to find a resolution. Sample code: "Default.aspx" has a PlaceHolder(ToolHeader). In the Page_Load(), we dynamically load a user control passing in the virtual path to a helper method [public Control ParseUserControl(string virtualPath)]. This reads the content from the physical path, returns
a Control from ParseControl() method. I immediately get the following error when I open the default.aspx page in browser.
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: Could not load type 'DynamicUC.UcControl'.
Source Error:
Line 1: <%@ Control AutoEventWireup="true" CodeBehind="UcControl.ascx.cs" Inherits="DynamicUC.UcControl" %>
Can't figure out why it can't load the type. Namespaces are looking right. I try removing the Inherits="DynamicUC.UcControl" attribute from the "ucControl.ascx", it loads the page fine. Also, this control is a simple one and has no code behind. There are others with actual code behind. They won't work if I remove the Inherits attribute.
[Code]..........
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May 7, 2010
I am having this same problem as this thread. Unfortunately, trying to align the version .Net Framework and Toolkit versions seem to have no effect
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Jul 12, 2010
I have an existing dataset in VS2008 and app works fine untill I tried to add new datatable.It gave me the following error -
Custom tool error: Failed to generate code. Unable to convert input xml file content to a DataSet. Invalid XPath selection inside field node.
And designer.cs got deleted.If I mannually add datatable in .xsd then it is good.But that option is not acceptable.
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Jan 5, 2011
public class CustCtl : WebControl
{
protected override System.Web.UI.HtmlTextWriterTag TagKey
{
get
{
return HtmlTextWriterTag.Div;
}
}
}
With this bare bones control, it would render the root element as a Div tag. But how can I add attributes to that root HTML element that this control will render .
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Nov 13, 2010
I'm new to ASP.NET and MVC in particular. Now, I'm trying to understand if I can easily get values of custom attributes of submitted data. For example, When writing something like this inside a form (which works and posts and I can get the checkbox value) <%= Html.CheckBox("cb1", new { listen = "listen:6" }) %> Can I get the value of "listen" directly or do I need JS? (I know I can just use hidden fields, but I'm I'm asking anyway)
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Aug 2, 2010
I'm working on a custom serverside control and faced to a weird issue.
The control's client-side markup should look like:
[Code]....
But my control renders following markup:
[Code]....
As you can see, attributes for the first <li> element is not rendered.
Here's the Render method:
[Code]....
items collection is filled correctly. Debugging the code showed that AddAttribute is called for first Li element, but the output is rendered incorrectly.
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Dec 23, 2010
I have class that Inherit from UserControl Class.
public class Module : UserControl
{
// Custom Property And Method
}
How can i load a UserControl (.ascx) and convert to my Module Class?
UPDATE :
the error is : Unable to cast object of type 'ASP.UC_acsx' to type'BICT.Module'
my class is like this :
namespace BICT
{
public class Module : UserControl
{
public Module()
{
// Some Initial
}
// and some extra property exp.
public int Index{ get; set;}
}
}
is somthing wron with my code?
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Mar 8, 2011
Supposing I have a user control like this <MyTag:MyWidget runat="server" /> I am wondering if I can do something like <MyTag:MyWidget runat="server" MemberHeight="400" PublicHeight="200" /> So that in MyWidget.ascx I can have <div height="<%=IsLoggedIn ? MemberHeight : PublicHeight%>"> or something like that...? Because I want the height to vary in each page that is using this widget.
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Mar 23, 2010
I have a page which holds a custom webcontrol and a usercontrol. I need to reference of webcontrol in usercontrol class. So, I make the declaration of webcontrol as public in page class. But, when I do "this.Page.", I don't see the webcontrol listed in list provided by intellisense. Most probably, I am missing something.
In an asp.net page, how to get a reference of a custom webcontrol from a usercontrol?
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Mar 17, 2010
<%@ Register Src="~/Controls/PressFileDownload.ascx" TagName="pfd" TagPrefix="uc1" %>
<asp:Repeater id="Repeater1" runat="Server" OnItemDataBound="RPTLayer_OnItemDataBound">
<ItemTemplate>
<asp:Label ID="LBLHeader" Runat="server" Visible="false"></asp:Label>
<asp:Image ID="IMGThumb" Runat="server" Visible="false"></asp:Image>
<asp:Label ID="LBLBody" Runat="server" class="layerBody"></asp:Label>
<uc1:pfd ID="pfd1" runat="server" ShowContainerName="false" ParentContentTypeId="55" />
<asp:Literal ID="litLayerLinks" runat="server"></asp:Literal>
</ItemTemplate>
</asp:Repeater>
System.Web.UI.WebControls.Label lbl;
System.Web.UI.WebControls.Literal lit;
System.Web.UI.WebControls.Image img;
System.Web.UI.WebControls.HyperLink hl;
System.Web.UI.UserControl uc;
I need to set the ParentItemID variable for the uc1:pdf listed inside the repeater.
I thought I should be able to find uc by looking in the e.Item and then setting it somehow. I think this is the part where I'm missing something.
uc = (UserControl)e.Item.FindControl("pfd1");
if (uc != null) { uc.Attributes["ParentItemID"] = i.ItemID.ToString(); }
Also tried this with similar results... when I debug inside my usercontrol (pfd1) the parameters I am trying to set have not been set.
uc = (UserControl)e.Item.FindControl("pfd1");
if (uc != null)
{
uc.Attributes.Add("ContainerID", _cid.ToString());
uc.Attributes.Add("ParentItemId", i.ItemID.ToString());
}
UPDATE: It looks like my controls are not connected by a namespace. I've wrapped by the parent control (Layer) and the PressFileDownlad control in a namespace "MyControls". Also updated their Inherits reference on the aspx to read "MyControls.xxxxx". I'm able to type "MyControls.Layer" inside the code on layer.aspx.cs but I'm not able to get "MyControls.PressFileDownload"
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Mar 24, 2010
I have a page which holds a custom webcontrol and a usercontrol. I need to reference of webcontrol in usercontrol class. So, I make the declaration of webcontrol as public in page class. But, when I do "this.Page.", I don't see the webcontrol listed in list provided by intellisense. Most probably, I am missing something.
In an asp.net page, how to get a reference of a custom webcontrol from a usercontrol?
View 4 Replies
Nov 26, 2010
I have created my own custom usercontrol(.ascx) consisting of labels and image etc. I need to be able to click on this control but i dont know how to add a click event to it.
Basicly i want this whole control be like a huge button which i can click on.
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Feb 1, 2010
I am trying to create a more detailed item template for the standard CheckBoxList control. It exposes an ITemplate property called TemplateControl but I wasn't able to find a straightforward resource on how to actually use it. Here's the code I have so far:
Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
MyBase.OnLoad(e)
Dim items As New List(Of ListItem)
items.Add(New ListItem() With {.Text = "A", .Value = "1"})
items.Add(New ListItem() With {.Text = "B", .Value = "2"})
items.Add(New ListItem() With {.Text = "C", .Value = "3"})
Dim lst As New CheckBoxList()
Dim tpl As ITemplate = LoadTemplate("~/CustomListItem.ascx")
Dim g As New TemplateControlWrapper()
tpl.InstantiateIn(g)
lst.TemplateControl = g
lst.DataSource = items
lst.DataBind()
Form.Controls.Add(lst)
End Sub
Class TemplateControlWrapper
Inherits UserControl
End Class
It seems to be ignoring the TemplateControl property completely.
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Jan 13, 2010
I'm setting up a web application with multiple forms. Each form is defined within an asp:FormView with the DataSource set to an ObjectDataSource. Each form contains it's own set of fields and always contains one or more blocks of fields, which are the same for multiple forms.
Because this blocks are the same, I decided to define them in a custom usercontrol. The questions that came up with this:
How can I use the same datasource for the input fields in the usercontrol as in the 'higher' asp:FormView?
Is it possible to use DataBinding.Bind() for the input fields in the usercontrol, with this same datasource?
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Jul 23, 2010
I have on my Page a Label control and custom UserControl. I want that, when something appears in the UserControl, it shoud change e.g the Label's Text property (as I mentioned, the Label doesn't belong to the UserControl). How to do that ?
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Mar 25, 2011
I've created a UserControl in VB.NET and added it to a form. But it looks like I've done it wrong as it is underlined with the message:
ctlDropDown is not a known element. This can occur if there is a compilation error in the Web site or the web.config file is missing.When I try to run it I get the following error: myControl is not allowed here because it does not extend class System.Web.UI.UserControl.
Here's the code:
control itself...
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="ctlDropDown.ascx.vb" Inherits="myProj.UserControls.ctlDropDown" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>[code].....
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Feb 26, 2010
I have a particular scenario and I would like to know how I can implement it in the most efficient way. I also have some queries related to this. The application is a AJAX 1.0-Enabled ASP.NET 2.0 Web application.
I have a link, which when clicked I need to show a pop-up div. The contents of the div will be displayed using a usercontrol. The usercontrol will display the contents based on a query string value.
I would like to know:
1. How can I implement this in the most effecient way. I don't want to use a separate page on which I will have the usercontrol and then display the page in the div.
2. Suppose I call a JS function ShowDiv() on the click of the link, to display the pop-up div. Say, I call the function this way ShowDiv('querystring'). Now how will I pass the value 'querystring' to my usercontrol.
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Feb 16, 2010
I want to embed some image and java script file in usercontrol and extract them with code like this
[Code]....
i tried similar code that use this technique in custom controls , and it works ...
but i want use this technique in usercontrol ,
can any one put a sample source code or explain how can i use this technique in usercontrol ?
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Jul 28, 2010
I have a custom control in an aspx page that has a property named Size
public int Size
{
get { return Convert.ToInt32(ViewState["CreativeSize"]); }
set { ViewState["CreativeSize"] = value; }
}
This property is set in the aspx page to a value lets say 500 during a postback called by a Button control that is in the page (not in the custom control).
I also have a button inside the custom control that raises a postback like this
protected void btnUpload_Click(object sender, EventArgs e)
{
if (fuBannerfile.HasFile)
if (fuBannerfile.FileContent.Length / 1024 > this.Size)
;//code here not important
}
When this event is called the "this.Size" property is 0. I also noticed during debugging that during Page_Load of the page, if i access the property like this:
int size = customControlId.Size;
the property is set to 500. But after that when the debugger reaches the event inside the control the property is 0.
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Jun 16, 2010
I have created lots of UserControls, but never tried CustomControl.Recently i created a Photo Gallery UserControl using Listview & Visual LightBox.Now i want to publish it as CustomControl.Here is my UserControl's code :
<link rel="stylesheet" href="LightBoxGallery/css/vlightbox.css" type="text/css" />
<style type="text/css">
#vlightbox a#vlb
[code]...
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Apr 13, 2010
Using the ValidationProperty I've managed to connect a RequiredFieldValidator with my custom control. When I enable client script in the validator, JavaScript errors occur.
Is there a way to tell the RequiredFieldValidator how it can validate my custom control in the client?
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May 27, 2010
I created a customDropdown usercontrol with Events and It worked fine.
Now I stored the path of the ascx file in the database table and i want to Load the ascx file and handle the Events dynamically in an aspx page.
To Load the usercontrol and access the public properties and method, I need to know the object i am trying to load, right?
For Example
FeaturedDDL c = (FeaturedDDL)Page.LoadControl("~/FeaturedDDL.ascx").
But I dont want to hardcode objectType "FeaturedDDL", coz i dont have that stored in my Database field.
Since I am loading the usercontrol by getting the path and name of the usercontrol from the database table,how will I know the ObjectType at that time?
How to accomplish that and also how to handle the events for these type of situation?
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Jan 25, 2011
I tried both, loading the usercontrol when needed and I also tried adding it directly into the aspx.
Nothing worked. With the second one (what's meant to be the easiest option) I tried with delegates and events (but can't access de usercontrol event from page) and tried with properties (I can access properties but they're always empty)
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Jun 12, 2010
I have a user control that consistes of a dropdown menu, a label, a textbox and a button. It resides in a html table, what i would like to do is on a keypress, such as the "insert" key, i would like to add the same control again directly on the next row, I have used programs that do this, but for the life of me can't figure out how its done...
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