How Does One Output Arbitrary Text From INSIDE A Control Class In C#, MVC
Aug 28, 2010
Is it possible to say something to the effect of 'SomeClass.Out.WriteLine("hello world")' and have it actually show up for the browser to render? I ask, because I notice that the HtmlHelper BeginForm implements IDisposible. So at the end of the using block, a closing tag is written to the browser.I am not saying I would use this practice, as it seems like a bad idea, but I just want a better understanding of what is going on under the hood of C# ASP MVC.
Is it possible to set the Inherits attribute of an ASPX Page directive to a class in an arbitrary assembly?
I need to modify an ASP.NET (1.1) application for which the source code was lost. In a new assembly (foo2.dll) I've created a replacement code-behind class that derives from the original class in the site's code-behind assembly (foo.dll). It seems easy enough to set the Inherits attribute of the Page directive to the new class name, but when I do that the web server gives me Could not load type 'Foo2.checkout2'. I am referencing the new assembly in the <assemblies> section of Web.config.
I don't see anything in the documentation to indicate that this scenario is unsupported, but I'm not certain that it is, either.
How do you reference an asp.net control on your page inside a function or a class. private void PageLoad(object sender, EventArgs e) { //An example control from my page is txtUserName ChangeText(ref txtUserName, "Hello World"); } private void ChangeText(ref HtmlGenericControl control, string text) { control.InnerText = text; } Will this actually change the text of the txtUserName control? I tried this and is working private void PageLoad(object sender, EventArgs e) { ChangeText(txtUserName, "Hello World"); } private void ChangeText(TextBox control, string text) { control.Text = text; }
How to use text box control in asp.net 2.0 class ? i have write function in class then i want to call textbox control in default.aspx for using how can i do ?
I want to write own control which can contain other. And I want to define content of the control in the .aspx file where the control is defined. I have written such control. But now I have issue with ViewState of inner controls of my control. The following samle illustrates the issue: I defined two asp:DropDownList ID="ddl1" and ID="ddl2" One of them is inside of my control and other is outside. When posback is occurred asp:DropDownList ID="ddl1 loses state and becomes empty. How to say ASP.net to store state of inner controls defined by this way?
MyControl.ascx:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MyControl.ascx.cs" Inherits="DynamicControls.Controls.MyControl" %>
I have created the user control and it has got one table with few rows in it. One row has got a text box with custom validaor and other row will have check boxes dynamically added through server side.
On the main page, i am loading that user control about 10-15 times depending upon the values from the database.
Is there any way of setting the properties of user control validator on the main page? Text box will only be validated if any check box is checked in the user control.
I am also not able to find the usercontrols through the main page.
Can anyone tell me how to show alert message inside the .cs file of class library project in c#? I am calling a method of cs file in classlibrary project. Whenever the control comes to the alert message statement inside the method, alert message should be shown on the web page(aspx) and the next statement to the alert message statement should not be executed.
from one computer running Visual Studio 2008 to another computer running Visual Studio 2008.
I can rebuild/build the solution just fine on the new computer, but, if I select 'start debugging', it goes through the compile/build process and then ultimately pops up a window that says:
"A project with an Output Type of Class Library cannot be started directly.
In order to debug this project, add an executable to this solution which references the library project. Set the executable project as the startup project."
NOTE: the 'start debugging' runs fine on the older computer..
I've inherited (no pun intended) an old ASP.NET 1.1 project that is now .NET 3.5. It is designed with base class that inherits from PageBase. All of the subsequent aspx pages inherit from this custom pagebase. It currently works by generating a bunch of html text in LiteralControls for the headers and navigation bars and dropping it into an HtmlGenericControl (in this case called 'page'), which is then displayed on the page by using this.Controls.Add(page); This actually works, except for the following output:
<span> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> ... </html> </span>
Those span's aren't supposed to be there obviously, but they come from the HtmlGenericControl, which defaults to a tagName of span. This is causing some strange behavior in IE regarding centering controls on the page.
Basically I know I should be using masterpages for this type of thing, but I don't have time to switch this all over, and I'm not an ASP.NET expert yet to where I know exactly how to solve this problem. Is there another way of sending literal text directly to the HTML output without wrapping it in a control? Obviously I need the DocType to be the first thing on the page; nothing wrapping it.
I tried this technique as suggested on another forum and a couple of other things, suggested on SitePoint as well as others but to no avail. Im trying to find the Label in the repeater to display information depending on the output. However I was presented with the following error:
"Index was out of range. Must be non-negative and less than the size of the collection.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index"
It highlights the problematic script as:
Label lblStatus = rptGeneralEnq.Items[0].FindControl("lblStatus") as Label;
I'm trying to access the Label, in the repeater, so that depending on if the text origionally displays true or false (as the label grabs the 'bit' datatype for that record to display) to then change the text to something more appropriate (completed/outstanding) - if at all possible.
I'm working on a page which allows a user to do the following:
upload XML filevalidate XML filebulk loads data from XML file into MS SQL Server tablesruns a number of stored procedures to do certain checks on the imported data.
Now, I know how to do all of the above.
However, I would like to inform the user between the execution of the above mentioned actions what is happening.
I've looked at using the controls "updatepanels" and "updateprogress", but can't seem to get it to work.
If I put some static text like "Loading..." in the updateprogress control, I do see that whilst the code is running.
However, I don't want to show static text but want to change the text dynamically.
It appears that server-side controls are completely ignored inside the "updateprogress" control (why?).
I use the code below to output the string to txt and it works. However, for characters like "&" it output as "amp" etc which is undesirable. How could I fix it.
// Output the text file to the stream Response.Clear(); Response.AddHeader("content-disposition", "attachment;filename=FileName.txt"); Response.Charset = ""; Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.ContentType = "application/vnd.text"; System.IO.StringWriter stringWrite = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite); Response.Write(str.ToString()); Response.End();
I have some code written in c# to obtain the text and numbers from a web interface that required user inputs. my problem is that the texts i am getting off the web is displays in html forms (i.e. it has tags all over the place) hence, i would like to filter out the html tags, is that possible? i searched up some codes but it didn't help me as it brought up even more problems when compile.
i have a function that return string format i want to use this function in HTML and set label's text property i use this code that i know it's incorrect how can i implement that?
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).
I am looking for some adivce about the possbility of doing the following while working whith MVC. Firstly sorry if the subject line is not very descriptive. I have put something together in ASP WebForms where by I can put a few core fields on my page that identify an object, e.g. a Name and ID... and then I can add arbritrary fields to the aspx page that are now saved and retrieved with the "owning object". These extra fields are stored in a seperate table on the database to the primary object fields. A short explanation of how this works:
1. I have my own version of TextBox (and other input controls) called r3d:TextBox (etc.) and this text box has XmlParent and XmlElement tags, this is done by way of an interface.
2. I have a r3dBase page that all my forms inherit from and this page check for the existstance of any r3d:TextBox (and other input controls) that have the XmlParen and XmlElement tag defiened.
3. When an iheriting form is saved the controls with the Xml tags defined are also saved, but I don't have to change any code in the code behind pages. The framework I have put in place takes care of this for me. The data is saved
4. When an inheriting page is loaded all controls with the XmlParent and XmlElement tags are populated with any data that has previously been saved for them that belong to the main object being displayed on the page.
This provides for a nice easy way for me to extend my forms with non core data when clients request new fields. It also means that different clients can request different new fields and I don't have to make any modifications to the core objects. I have another mechanism that determins what fields are seen by which clients.
Anyway I am completely new to MVC (not written a single line of code) so I have no idea as to whether this paradigm will lend itself to the above described mechanisms or not. Does any one have anythoughts about this, approaches I might try to achive the above to of functionality or perhaps completely different suggestions that would achive a similar end that might work well with MVC
