Web Forms :: Custom Control Not Shown / Implemented When Control Is Used In Testing Project
Mar 16, 2011
My development environment: VS2010, win7. My regular solution setup for authoring a custom control is a Website project which I use for testing purposes and an ASP.NET server control project which is the actual control. Sometimes when I make changes to the custom control project and rebuild the solution the changes I made to the custom control are not shown/implemented when control is used in my testing project so I MUST close the solution and reopen it in order for my changes to appear.
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Sep 9, 2010
I have own control implemented in "CommonControls" assembly (the same namespace). It us 'Custom control' inherited from 'WebControl' class and implemented without ascx file.
It is necessary to use this control in "main" web site. how to register this control?
I know it should be something like this:
<%@ Register Assembly="CommonControls" Namespace="CommonControls"
TagPrefix="uc" TagName="TopMenuControl" Src="..." %>
But what should I specify in the "Src" property?
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Sep 22, 2010
I have a published web project. I want to add some .ascx files (with .cs & designer.cs files) to that published web site. These are simple custom user controls that access methods already part of the original application. Question? Is it possible to just drop these in the published web project without building the entire solution? If not why? When I drop these files in and run my application I get the error: "Parse Error: Could not load type 'the name of my custom controls namespace'". There is not a lot of code to show so this is all I have.
Default.aspx
<%@ Page Language="C#" MasterPageFile="~/MasterPages/TwoColumn.master" AutoEventWireup="true"
Inherits="ApplicationName.Web.Default" CodeBehind="Default.aspx.cs" %>
<%@ Register TagPrefix="uc1" TagName="CustomControl" Src="~/Controls/Custom/CustomControl.ascx" %>
<asp:Content ID="content" contentplaceholder="cph" runat="Server">
<uc1:CustomControl ID="cc1" runat="server" CustomProperty="Hello World" />
</asp:Content>
CustomControl.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="CustomControl.ascx.cs"
Inherits="ApplicationName.Web.Controls.Custom.CustomControl" %>
<asp:PlaceHolder ID="ph1" runat="server></asp:PlaceHolder>
CustomControl.ascx.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace ApplicationName.Web.Controls.Custom
{
public partial class CustomControl : System.Web.UI.UserControl
{
///My logic
}
}
Again it seems so easy. What am I missing? Or is this not possible?
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Feb 3, 2010
I have a custom control that is based off the gridview control located at: here The control is basically a gridview that automatically creates a column of checkboxes that can be used to "check" individual rows in the gridview. During the gridview's "CreateColumns" event, the "checkboxcolumn" is created dynamically. The checkboxcolumn also contains another checkbox in the header that is used to "select/deselect all" checkboxes in the column. Since the gridview does not automatically remember the state of the checkboxes in the checkboxcolumn on postback, I added a method to the control called "SaveCheckBoxState" which stores the indexes of the checked rows in Viewstate, and then I modified the "OnRowDataBound" event to check the Viewstate and reset the checkboxes based on the Viewstate.
I then added a call to "SaveCheckBoxState" in the gridview's OnSorting and OnPageIndexChanging events. This works great so long as I'm sorting or changing pages. However, I need it to update the viewstate everytime someone clicks or unclicks one of the checkboxes. At this time, the checkboxes are rendered with an onclick event that calls some javascript to highlight the row, or in the case of the checkbox in the header, to select/deselect all checkboxes. I need to call the "SaveCheckBoxState" method from the javascript used by the customcontrol, or I need to find a way to modify viewstate from javascript and perform the same action as "SaveCheckBoxState".
I've tried adding the "SaveCheckBoxState" to the onclick event declaration in the checkboxes, but when run, it simply tells me that the method is undefined. It doesn't exist in the parent page, and I don't think I should have to make an event for the parent page to pass the click to. It seems to me this should be all self contained within the custom control. Does anyone know how I can acheive this? Here is the code for the gridview OnPreRender event where the onclick event of the checkbox is set:
protected override void OnPreRender(EventArgs e)
{
// Do as usual
base.OnPreRender(e);
// Adjust each data row
foreach (GridViewRow r in Rows)
{
// Get the appropriate style object for the row
TableItemStyle style = GetRowStyleFromState(r.RowState);
// Retrieve the reference to the checkbox
CheckBox cb = (CheckBox)r.FindControl(InputCheckBoxField.CheckBoxID);
// Build the ID of the checkbox in the header
string headerCheckBoxID = String.Format(CheckBoxColumHeaderID, ClientID);
// Add script code to enable selection
cb.Attributes["onclick"] = String.Format("ApplyStyle(this, '{0}', '{1}', '{2}')",
SelectedRowStyle.CssClass,
style.CssClass,
headerCheckBoxID);
// Update the style of the checkbox if checked
if (cb.Checked)
{
r.BackColor = SelectedRowStyle.BackColor;
r.ForeColor = SelectedRowStyle.ForeColor;
r.Font.Bold = SelectedRowStyle.Font.Bold;
}
else
{
r.BackColor = style.BackColor;
r.ForeColor = style.ForeColor;
r.Font.Bold = style.Font.Bold;
}
}
}
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Feb 3, 2010
I've added a .ascx control in a Master Page in the site's root. It is perfectly shown when the page is in the same master page path (in the root in this case), but when the page is contained in a subfolder, the component isn't displayed.
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Mar 4, 2010
I have a custom control which inherit from the Table class and in the constructor, it takes a an integer as an argument. There is no empty constructor.
Is there a way for the user to set that variable in the properties window after they drag the control onto a form.
I know some .NET controls, you can set the source for the parameter to different things like another control's property, QueryString using just the properties window.
Right now, I have to create the control dynamically. I read the query string and then created the object.
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Feb 16, 2011
ive created my own custom control, now in the code behind of the custom control file i can add Name.Click += new EventHandler(name); but on the codebehind of the page where ive used the custom control i cannot, is there anyway i can regsiter it as an available attribute to add? my code below and on the image the test codebehind click is not available, how can i get it?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class LargeButton : System.Web.UI.UserControl
{
public string JSFunc { get; set; }
public string SSFunc { get; set; }
public string ImgName { get; set; }
public string LinkText { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
Link.Attributes.Add("onclick", "javascript:"+ JSFunc + ";");
Link.HRef = "javascript:;";
Link.Title = LinkText;
Img.Src = "~/App_Themes/" + Page.Theme + "/Images/Icons32/" + ImgName;
Img.Alt = LinkText;
//Link.ServerClick += new EventHandler(asd);
}
}
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="LargeButton.ascx.cs" Inherits="LargeButton" %>
<a ID="Link" runat="server" class="MenuItemLarge" clientidmode="Static" >
<img ID="Img" align="center" runat="server"/>
<br />
<%= LinkText %>
</a>
<MB:LgButton runat="server" ID="Save"
JSFunc="Save(this)"
ImgName="save_32.png"
LinkText="Save" />
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Mar 15, 2010
I`m developing a web app. using VS2005 on Windows Vista and IE 8. As i view my page on IE the FileUpload control doesnt shows.
everything was fine when i was using IE 6 on Win XP.
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Dec 24, 2010
here's a situation and I would appreciate your response.
I have programmatically created the Wizard control:
Page_Load(obj s, evargs e)
{
Wizard ClaimDetailWizard = new Wizard();
foreach(int item in selectedItems)
{
//create new step
//added custom control to new step
//add step to wizard
}
//added wizard to a placeholder on a page
}
Based on List I get from Session i added new steps to my wizard To each step I had added a custom control
Each custom control in tern contains another custom Gridview Control in it.
So here's the problem when the page loads for example for two steps. All is good Wizard does what it's supposed to do.
But when I try to use sorting or paging in that custom Gridview. Somehow it displays the gridview I should see in the next step of the wizard.
Also what I'm noticing through debugging. Is that when I press next in the wizard I go back to the original page where I do all of the code specified above, and it recreates the wizzard. But it goes to the next step. Is this the way wizard supposed to work? Just doesn't seem very efficient.
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Dec 20, 2010
created a Custom Textbox Control that is intended to be a "masked date" textbox, so that I can handle different ways a user might enter in a date and make it work no matter what.I did this by creating a custom control with 3 separate Textboxes one for month,one for day one for year,then do some handling for different things that could be entered and it would all work.
The problem I am having is,when I add this control to the page,if I do an alert to check the Text value of the custom control it just gives me "[ServerControl1]" even if I enter in a date.
I tried doing an AutoPostback after entering so that it would refesh the Viewstate to have the values of the textboxes but the control doesnt seem to actually postback, even though I have it enabled.accessing the Textbox value after someoen
has entered a date?first custom control I have created and have been using google.
My Server Control Code is as follows:
[Code]...
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Apr 28, 2010
I have been asked to join a very small team where one main developer has been buiding the web app (.NET 4.0) during ~6 months. The project should be delivered within next 2 months.
After first look at the code I can say that I would never allow it to go to production (things like catch { }, no tests at all with WebForms etc).
So the code quality is incredibly low.
My task is to improve that and still deliver the solution. So I plan to start with unit testing and MVC2 reimplementing most of the functionality (though using some of the existing code).
I estimate that I will need about 6 weeks to catch up with the current progress and be on te same functionality level as the application will be in 6 weeks.
The problem is that the main developer who has been working on the project seems to be really starting in IT and many basic things are unknown to him. It will take significant amount of time and effort to educate him how to do the proper testing, development and apply some patterns.
I am ready to take responsibility for the reimplemnting the application but at the same time I don't want the main developer to be on idle but as he won't be able to significantly contribute to the better-world project at this stage I am not sure what would the best way to keep productivity high for both of us.
Currently I think following solution is good enough: He proceeds doing what he does until I will catch up with him and then start working on a new project together.
The problem is that of course this approach is not very productive as one developer will do better-world project while the other will proceed with what he did, effectively doing similar tasks.
Another approach would be to pair and try to do things together, but again not sure how productive we will be.
Can you suggest how we could better organise the work together in order to be most efficient for the overall project?
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Oct 27, 2010
I have created a user control and am ready to convert it into a custom control. I am trying to follow:
[URL] the steps mentioned in the link.
I am not seeing Build / Publish Web Site option.
I am using VS 2008. I only see Publish User Control but it doesn't give all the settings mentioned below. When I do publish user control, it just copies the ascx file to the desired location. how can I convert the user control to custom control.
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Mar 11, 2010
I'm trying create unit testing for an existing website project (not web application project). I cannot access my under test classes unless I use accessor. However, if I use accessor, I have problem to initiate an object with passing arguments. I only want to create unit tetsing for App_Code. After searching web, and I found that I'd better to create a web application project using my current existing website project. From solution explorer, add new project ->using existing website. My questions is: what impact will have for my current website to create the new project? Should I just convert my current website to web application? If do that, will it cuase problems on my website? I am new on asp.net, still learning..
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Jul 23, 2010
I have a ListView control that only displays one record at a time. I have a LinqDataSource that can return one or more records. I have a function that determines the number of records and returns a psuedo random number between 1 and the number of records returned. When the page first loads, I want to display a random record. After that, I want the datapager to move the user normally through the records.
In my Page Load Event, if Page.IsPostBack is false, I get the random number. Let's say for simplicity I have 15 records and the randon number generated is 6. How do I tell the LinqDataSource to display the record at index 6?
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Oct 6, 2010
I was not able to do unit testing for our existing web site project. I converted the web site project to a web application project. I did some unit testing and changes on the converted web application project. However, my co-worker was doing UI testing on the web site project. We need put UI testing and unit testing to the web application project. Is it possible to move the UI testing code that my co-worker did to the web application project I am working? If so, how do you do it?
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Oct 18, 2010
I created an Extender which has a custom property that drills down a list XML elements from an xml file, where users can select xml elements during design-time. This works perfectly fine. However, my code only has a hardcoded xml filename (source of the xml elements list) and I need to change this by maxing the xml file user-specified.
What I did is that I created another control (panel) which has a custom property that when clicked (through the ellipsis), it will allow a developer to select the xml file which is supposed to be the source xml file that the Extenders shall use. The filedialog from custom panel's property works perfectly fine.
However, my problem now is that when I drag-drop my Extender, I cannot find a way to get the property value of the custom Panel Control which contains the xml filename. I tried creating a static variable which I thought the custom controls can share but VS2010 is breaking.
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Oct 12, 2010
I have 3 pages in each page there is a portion of page where it is common in all these three pages.Thought of making the common stuff as a separate control either User control/Custom control.Any suggestions on which one should i use custom/user control
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May 27, 2010
I recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a tag with
[Code]....
Server-side Code -
[Code]....
I have a breakpoint on the UploadedComplete event but it never fires. However, if you take the AsyncFileUpload control out of the , making it visible at initial page render, the control works as expected.
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Mar 20, 2010
Can a custom user control embed another custom user control?is this "bad practice"?eg if i have a custom user control named "Forums" then 2 more custom controls that are "Read_Forums" and "Write_Forums"and all i need to call is "forums" in the page asking - and then it will put in both functionalities..
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Nov 7, 2010
If a composite server control normally encapsulate styling information inside, it is an example of code encapsulation and modularization. However if css properties are included inside the composite control, it is not ideal for code/styling separation and css code re-use principles. Now which consideration should be the main consideration?
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Nov 1, 2010
I have a web form, and an "add vendor" button. Click the button, a modal dialog pops up (ajax:ModalPopupExtender). User selects one of two radio buttons which shows a data bound asp:View in an update panel - this view is data bound to a single row and must be populated by the user. However I also want to provide a cancel button which should close the modal dialog and reset the bound view.
However what is happening is that the ModalExtender closes, but when the "add vendor" button is presented again, it's still bound to the same data. Do I need to clear my data source? How so I reset the forms/views so that when the 'add vendor' button is clicked again the form is presented as it should be (IE the 2 select options, picking one re-binds the asp:View)?
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May 26, 2010
I recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a <div> tag with visible=false.
Page code -
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="act" %>
<act:ToolkitScriptManager runat="server" ID="ScriptManager1" />
<asp:UpdatePanel runat="server" ID="upnlFileUpload">
<ContentTemplate>
<asp:Button runat="server" ID="btnShowUpload" Text="Show Upload" />
<div runat="server" id="divUpload" visible="false">
[code]...
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Jul 22, 2010
I need to develop control (template or user) which must have subtags with some items.
For example :
<SomeControl runat="server" id="scTest">
<column1>TestColumn1</column1>
<column1>TestColumn1</column1>
<column1>TestColumn1</column1>
</SomeControl>
This control may contain some other web server controls such as GridView.I need explanation of experienced developers, how to do that - take me to the right way
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Feb 26, 2010
I am writing an ASP.NET custom control.In my custom control code, I find a PlaceHolder control in the page like so:this.myPlaceholder = Page.FindControl("placeholder1") as PlaceHolder Then, I render the placeholder as the output of the custom control:
protected override void Render(HtmlTextWriter output)
if (this.myPlaceholder != null)
this.myPlaceholder.RenderControl(output);
However, this causes the placeholder to be rendered in two places - in the custom control output (good) and in the original location in the page (bad).
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Aug 19, 2010
I have used calender web user control inside my project where i took textbox,button and calender...but after dragging onto my aspx page..i am unable to access this textbox,calender and button on aspx page..
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