Web Forms :: Custom Control Error On Load Post Data
Oct 28, 2010
Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) at System.Web.UI.WebControls.CheckBoxList.LoadPostData(String postDataKey, NameValueCollection postCollection) at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) at System.Wzb.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
drag custom control onto a page inherits from checkboxlist control add to "items collection" statically in the properties window override the render method render method doesn't render the items collection directly -rather items assigned to different checkboxlist items collection that is added to an html table called htmltable with other stuff and controls added to it. I use htmltable.rendercontrol() as the only line of code within my render override
I've seen a good few questions like this around but havnt actually come across any articles with the answer (maybe just been unlucky with my research!).
Basically I'm looking to have say 3 links (or buttons) on a page, which in turn will dynamically load a specific user control into an update panel with AJAX.
Then I would like the usercontrol loaded to be capable of handling postback within the update panel (basically no page refreshes) to do its processing and return output.
Does anyone have any pointers to articles/blogs covering this?
I've seen many but non covered handling postbacks from the user control or handling the postbacks within the update panel.
I have a custom server control (composite control having dynamically created dropdown boxes and textboxes). I have enabled AJAX in order to avoid page reload.The server control is used inside the ASP.NET webcontrol having few buttons which controls the visibility of the server control. Now I enter values in the dropdown box and texboxes and click on any other button. After this postback the last entered values are gone! The control is not remembering the values. How can I retain the values after post back?
I have created a custom control from scratch and it works fine as in you can build the project that uses it and it works fine at runtime. Problem is when you go to design view the control shows an error in the place of where the control should be rendered.
Error: '<SomeValue>' Could not be set to '<SomeProperty>'
This shows up on all my custom set properties. These properties are created as basic as possible. I can give the properties values in Source view and run the app just fine. I can even add a Onclick event. If I don't set any custom properties the control will render fine in Design view. It's only when I set a value to a custom property.
Property Code Example:
[Code]....
I've even removed the Category and Description tags with no difference.
I don't know if what I said makes sens, but I hope it does.
I was referred here by MSDN forums hope this is the right place - I have a custom control (:WebControl) that renders web.sitemap in a specific way. While it runs error free and produces the expected result, at Design-Time it complains
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and have tried the SiteMapDataProvider Tag with and without the SiteMapProvider attribute.Does anybody have (a) any experience with this, or (b) any suggestions as to how to track down the problem?
This is my first membership provider; I converted the sample provider [URL] to SQL. I created a vb class provider and put it into the App_Code folder. After it was created I tried to modify my webconfig but the error pops up. I don't know what else to try, I don't know if I have missed something
I have a parent control that has an instance of a HiddenField child control. I am using CreateChildControls() to add it. Everything works client side including the values being added to the field. However, on postback, the reference to the field is null
here is the code
[code]....
I have tried simply relying on the ViewState ... then also attempted using FindControl(). Neither works, it comes up as a null reference ... any input on what is going here?
How does Google custom search results posts data to partner site technically? We have requirement to place our form on our partner sites and display results too.
1) Google custom search box is simple javascript and posts form to google.com. But ours will have to fetch html from our servers cause it's not a simple text box, would need some ajax.
2) How do we then display the results on partner website?
Concept is same like Google custom search. I am just wondering how do we do it in ASP.NET?
I'm creating a custom ASP.Net GridView and I want to be able to alter the __EVENTARGUMENT value but I can't figure out how to capture the returned value on the server side.
I'm creating the ability to have a collapsible representation, so the first level is the standard GridView and I will insert additional rows via JavaScript if they expand the first level row.
My problem is how to create a link on the selecond level rows that posts back with custom data.
I'm building this small control. It should detect client resolution and set height and width values within two separated HtmlInputHidden controls. But tester property is not getting values froms this control.
[ToolboxData("<{0}:UIControlResolution runat=server></{0}:UIControlResolution>")] public class UIControlResolution : Control { HtmlInputHidden _txtwidth = new HtmlInputHidden(); HtmlInputHidden _txtheight = new HtmlInputHidden();
I have a custom PagedDataSource created at page load.I have created two lin button "Next" and "Prev" to navigae the data source.I am using session to store the PDS and retrive it on each page load .I am incrementing CurrentPageIndex each time by 1 in the buttonNext click event and setting the value to the pds object.
What i am trying to do is, when the page loads, if page currently showing is last index, disable the "Next" button. The problem is, everytime I have to click "Next" one more time to make it disabled. It seems, the page does not recognize that it is the lastindex of the datasource when loading. When I click again one more time while in the last page , it is disabled.
i have uploaded my site [URL] it it working properly on local machine but when i uploaded on server i am facing 1 error on button clik of any form. there are two ages career and contact whenever i submit this data by clicking button i get this error. Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.
Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".
[Code]....
Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customErrors> configuration tag to point to a custom error page URL.
I am having a very hard time in consuming a very simple web user control that I have built using a Web Application project in VS 2010. The user control works fine as long as the consuming aspx page is in the same project. But after deploying the project using Web Deployment Project into a single assembly I am not able to use it correctly from another aspx page which is in a stand-alone project. The error I see is a null reference exception. Here are the steps that I am following:
1 Create a web user control named WebUserControl_Label using a web application project. This control works fine when used in an webform in the same project.
namespace TestWebAppWithCustomControl { public partial class WebUserControl_Label : System.Web.UI.UserControl { private string _labelText; public string LabelText { set { Label1.Text = value; } get { return Label1.Text; } } protected void Page_Load(object sender, EventArgs e) { } } }
2. Create a single assembly for the user control above using a Web Deployment project. The name of the assemby is TestWebAppWithCustomControl.
3. Create a webform in another web application project to use WebUserControl_Label user control. This project has TestWebAppWithCustomControl.dll added as a referemce.
This is how I am using the custom control above in an aspx page:
The problem is that .NET throws a Null Reference Exception when its trying to set the label text via the LabelText property. It looks like that the label control that lives inside the WebUserControl_Label user control is not getting instantiated and is always null.
I have found a few articles online that talk about creating such distributable user controls using ASP.NET website projects. But if possible I would like to stick with the web application project because of the benefits it brings.
My associate has created a custom SessionStateProvider for me to use with my ASP.net application. I add the file CustomSessionStateProvider to my VS2008 Web Application Project and put the appropriate reference in the web.config and it works fine.
However, my supervisor wants me to set this up as a GAC reference. At my office, we have many DLLs we've created that we use as GAC references across different projects. If I add my CustomSessionStateProvider to the Global Assembly Cache, my pages throw a could not load type CustomASP.CustomSessionStateProvider error. Simple removing the DLL from the GAC makes it work again, but I want to set this up as a GAC reference.
I have been using the RemotePost Class( as per http://www.jigar.net/articles/viewhtmlcontent78.aspx) to post a form to a pay provider, for about 3 months successfully, I made some changes external from the call to this class that sent an email when user presses the button to notify us that the user has selected to go through to the pay provider (similar to PayPal). and suddenly got an exception error MSCROLIB, Thread was being aborted. I have since removed the code and I still get the error it happens when I call
[Code]....
I tried the suggestion on KB article [URL]/ but the control is not past to the Pay Provider I also took the actual response that is written and posted it to a new html file added a submit button and it works. So I am no stuck. The Pay provider claims they have changed nothing, and has tried to help but says they are receiving no input from either our dev site or the live site.I also tried to step into the call but it just throughs the exception
asp.net with vb. I thought this would be easy but have been reading for an hour and not found out how to simply repost a page where form data has been entered and return the page with some error messages about what was entered. I want to return the page with all input controls with the data just as the user entered them before submitting. the error messages are labels that were blank when the page is first loaded. preferably the page returns focused to the topmost error error message. if that can't be done I would populate some label at the top of the page with something to the effect that 'errors were found, scroll down to see the errors'
I can not figure out what the problem is with my programming. There is no problem working locally, but uploading and making live is where this problem occures.
System.TypeLoadException: Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
