Web Forms :: How To Create Fileupload And CustomValidator

Feb 08, 2011 09:26 AM

how can i make dynamice fileupload and customvalidator on my page where customvalidator have some type of file for example xls,ppt just;

in onther word when user select file where it not in ajenda must customvaliator work else nothing do


Web Forms :: Validating The Width Of An Image From A FileUpload Using A CustomValidator?

Jun 09, 2010 02:41 AM

I'm attempting to validate the width of an image to make sure that it is at least 130px wide before uploading it to the server

Below is how I tried to accomplish this, however, I was still able to upload images that were less than 130px wide without drawing the error as intended


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Javascript + Asp: FileUpload And CustomValidator?

Aug 30 10 at 18:03

How can I create a CustomValidator on Client Side for validating my file path from FileUpload?

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Web Forms :: Create A Customvalidator For The Checkboxlist?

Mar 29, 2010 10:35 PM

I found this article [URL] on how to create a customvalidator for the checkboxlist. Followed all the way thru, but when i load my page i get the following error, how can it exist in 2 places? How can i resolve this to use the validation on the page?

Compiler Error Message: CS0433: The type 'CustomValidators.RequiredFieldValidatorForCheckBoxLists' exists in both 'c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files
oot294f506e54827e67assemblydl3b4b5a368e15533_8dcfca01RequiredFieldValidatorForCheckBoxLists.DLL'and 'c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files oot294f506e54827e67App_Code.5yh9snf-.dll'

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Web Forms :: FileUpload Focus / When Click The Fileupload Text Box , Choose File Window Have To Open?

Mar 19, 2010 05:41 AM

I m using FileUpload Control , when i click the fileupload text box , Choose file window have to open.

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Create And EditorFor FileUpload In Asp Mvc 3 Razor?

Mar 18 at 21:25

The lack of an EditorFor file in asp.net mvc 3 seems like such a glaring omission I wonder: Is there some way that mvc handles file uploads that is just not publicized that well? As near as I can tell there is no built in way to handle file uploads.I'm just curious if the file upload capability is in fact there and I'm just missing it, or if it does not exist at all.

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Web Forms :: FileUpload Control / How To Create Image Preview Before Image Uploaded

Sep 20, 2010 04:57 AM

i am using fileupload asp.net controll so how i create image preview before image uploaded

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C# - Get Data Chosen In FileUpload Control Without FileUpload.SaveAs Method On The Server?

Feb 17 at 18:34

How to get data (read file) chosen in FileUpload control without FileUpload.SaveAs Method on the server? Is it possible write it at once to some object?

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AJAX :: Uplaod Images Into The Database / When Put FileUpload Control In UpdatePanel The FileUpload?

Nov 23, 2009 07:49 AM

I want to uplaod my images into the database.it works fine if my images are inserted into the database on postback,but when i put my FileUpload control in UpdatePanel the FileUpload.PostedFile property shows NULL.remember my scriptmanager tag is in master page.here is the code:

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">



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Assign Full File Path Of FileUpload In Textbox Control Back To FileUpload On Postback?

Oct 14 10 at 3:13

I have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?

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Fileupload Within Update Panel / Can't Get The FileUpload Working Properly

Jan 15, 2010 12:54 PM

Hopefully someone can give me some pointers to get this working properly.

I have a webpage which I would like the ability to upload files to be stored in a database. Here's the layout of the page:


The update panel is configured as such:

ChildrenAsTriggers="True" EnableViewState="True" RenderMode="Block" UpdateMode="Always" Visible="True" Runat="Server"

The reason I have the update panel outside the Tabcontainer is so that when switching between tabs, the screen doesn't flicker with refreshes, etc. But as a result, I can't get the FileUpload working properly. The FileUpload1.Filename is blank, so it errors out.

Is there anyway to get this working properly? I've tried the latest AsyncFileupload within the control toolkit, but this caused all kinds of problems with my pages so that's out of the question. I tried an iFrame too, but this also didnt work properly.

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Web Forms :: How To Reference CustomValidator

Sep 02, 2010 07:28 PM

I have two CustomValidators, both of which function in the same way (call a query and check if a particular value is available in the DB), the only difference is the query itself.

Rather than writing the same function definition in the code-behind, I would like to find a way to execute a particular query depending on which CustomValidator called the function (I guess using the CustomValidator's ID) so if I have the follwing:


How can I check in the code behind , which validator called the function "Check"??

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Web Forms :: CustomValidator Will Not Work In Firefox?

Dec 02, 2010 12:18 PM

I am clicking one linkbutton to check the validators clientside in the panels. This works well in IE, but not in Firefox. When I click the button, it does not even hit the validateLength function


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Web Forms :: CustomValidator Not Working In 4.0 And FireFox

Jan 03, 2011 06:47 PM

Sample code below. Either I am doing something wrong or missing something in 4.0.

1: The function CheckText fires upon button click in IE but not in FF.
2: The function CheckText fires upon button click in IE /FF when the site runs under 2.0 or 3.5.


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Web Forms :: Javascript Does Not Work In A CustomValidator

Sep 28, 2009 12:59 AM

When the image is one of the 4 types, it still says it is not the proper type. So if the filext is a jpg, it says it is bad


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Web Forms :: CustomValidator Not Working With Three Boxes

Apr 20, 2010 06:17 PM

I have a custom validator which validates three text boxes. my code is,

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Web Forms :: How To Set An Error Message In A CustomValidator

Jan 25, 2011 01:29 PM

How can I set an error message in a CustomValidator and show this with the ValidationSummary after the submit with JavaScript.Thus, I want to trigger the Customvalidator with Javascript.

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Web Forms :: CustomValidator -- Error On Page?

Aug 22, 2009 04:00 PM

I have an ASP.NET form with a CustomValidator that is doing sever-side validation. It works fine in Visual Studio (both debug mode and not). When I post it to IIS it hangs in IE with an Error on Page message. Google Chrome just hangs. It hangs whether or not the field being validating is good or bad. If I remove the CustomValidator and enter in a value that I know is good, everything is fine -- the database gets updated, etc.

Here is the code:
<asp:TextBox ID="txtMemberName" Width="100" runat="server" />
<asp:RequiredFieldValidator ID="valMemberNameRequired" ControlToValidate="txtMemberName" ErrorMessage="Member Name is required" Display="Dynamic" runat="server" />
<asp:CustomValidator ID="valMemberNameExists" ControlToValidate="txtMemberName" OnServerValidate="ValidateMemberName" ErrorMessage="Member Name already taken" Display="Dynamic" runat="server" />

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Web Forms :: CustomValidator ClientValidationFunction Using CallBack

Jan 30, 2010 01:18 AM

I try to use CustomValidator ClientValidationFunction. The issue I have is CallBack using Asynchronous call which make it difficult to detect when the call is complete.

var callbackresult;
function ValidateSomething(src, args)
MyCallBackMethod(param); How shall I check when the call back is complete??? Any workaround?
if(callbackresult == 'true')
args.IsValid = true;
args.IsValid = false;

function CallBackRef(result, context)
callbackresult = result;

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Web Forms :: Passing Value From CustomValidator To ClientValidationFunction

Jul 28, 2008 10:38 AM

The code below shows a CustomValidator which calls a javascript function to validate a CheckboxList. (At least one box must be ticked). The Javascript function is called using ClientValidationFunction. This works fine. However my form will have many CheckboxLists and I don't want to have to create a different javascript function for each one. If I could somehow pass a value from the CustomValidator into the javascript function, I could then have just one javascript function to validate all my checkboxLists. How do I pass the value "CheckBoxList1" (Id of CheckboxList) into the javascript function?


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Web Forms :: Dynamic CustomValidator With ClientValidationFunction

Oct 09, 2009 01:05 PM

I need to be able to declare a CustomValidator in the complete in the codebehind page with no code in the aspx page. this is what I have writen


There are no Problems with the CustomValidator1_ServerValidate method or the Monthly method.I have used them on another page where they work fine. The only problem I'm having is that the ClientValidationFunction is never called.

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Web Forms :: CustomValidator - ClientValidationFunction & OnServerValidate

Sep 12, 2008 09:43 PM

In what cases would you define both? Would they basically have the same functions?

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Web Forms :: How To Use CustomValidator For CheckBoxList Web Control

Jan 12, 2011 10:41 AM

I want to use CustomValidator for CheckBoxList web control. I tried the code found on:[URL]

But it is not working for me. Nothing happens. No error.

My code (based on the provided link) is as follows:


But it doesn't execute client side CheckItem2 method.

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Web Forms :: Use A CustomValidator To Validate More Than One Control?

Aug 27, 2009 09:13 AM

I would like to use customValidator in my register page. The page contains not only textbox, but also checkBox, user controls.

It seems that I have to bind a controlID to a customValidator, and I can only bind textBox's ID to the validator.

Is it possible that one customValidator checks all textbox, checkbox, usercontrols? And how?

I first did not consider to use the custom validator, that I wrote a javascript to check all inputs from user, and register the validate method from code side like this:

protected void Page_Load(object sender, EventArgs e)

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Web Forms :: Use CustomValidator On A Listbox Control?

Apr 12, 2007 11:36 PM

Basically I want to check how many items are in a listbox. If there are no items then display validator error message. Here's what I'm doing.


I'm not sure what i'm doing wrong but on a button click event the validator doesn't seem to fire.

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Web Forms :: C# - Restrict A CustomValidator To Just 2 Controls?

Dec 06, 2009 12:57 PM

I have a webform with various links and controls. On the webform I have a TextBox ("ownNoteTextBox") and a Button ("shareNoteButton") which post the content of the TextBox. I want to require that the TextBox shall have just some content if it shall be posted by the Button. But at the same time I want to be able to leave the webform by clicking other links or Buttons, without putting any content in the ownNoteTextBox. The ownNoteTextBox and shareNoteButton are placed in a ListView inside View ownProfileView inside loggedInMultiView inside the loggedInTemplate of memberLoginView.

I have tried myself with some javascript but I get this error: "Microsoft JScript runtime error: Object required". Also I am unsure if I have placed the javascript the right place inside the .ASPX file?

Here is my javascript code:


Here is the ListView code with the controls:


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Web Forms :: CustomValidator OnServerValidate Not Firing?

Feb 11, 2006 06:06 PM

I have a registration wizard that has multiple steps. On one step, I have a ListBox control that needs to have at least one item in it's ListItems collection before you can continue to the next step.Here is the custom validator in the wizard step:



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Web Forms :: Compare Dates CustomValidator And ValidatorCallout

Mar 08, 2011 05:22 PM

I'm trying to compare two dates to make sure one is not greater than the other using a customvalidator and validatorcallout. However, I can't seem to get it to work and I've tried many examples but I can't seem to get what I want to work

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Web Forms :: Server Side CustomValidator Not Working?

Feb 06, 2008 10:01 PM

When I use the CustomValidate for server side validation, it doesn't seem to execute the server code. All my server code does (at the moment) is set args.IsValid = false; But everytime I run it, if I put anything in the textbox I'm validating, it passes. I put a break in the server code and it doesn't break. I've set the "ControlToValidate" to the right text box.

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Web Forms :: Pass Own Arguments To ClientValidationFunction When Using CustomValidator?

Feb 01, 2008 05:50 AM

I am using CustomValidator and I need to pass my own arguments to my ClientValidationFunction. Anyway I need to pass Client control's ID to my JS function (because of master pages) ClientValidationFunction have signature MyClientValidationFunction(sender, args), that's fine. But how to programmatically add more arguments? To the "args' argument? If yes how and then how to extract them from it?

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Web Forms :: How To Add A CustomValidator At Runtime With ClientValidationFunctions Enabled

Jan 04, 2011 04:57 PM

i have written a dynamic formular designer that generates all its form elements from a database at runtime.
The controls of the forms are entered into a table.

The HTML Table is the value that i return to the caller of my method so the caller can display the table insidehis own page.

I try to use ClientSideValidation to check the inputs of the form fields. So i generate a CustomValidator and try to add itto my table. But then there are some client side funtions missing, e.g. Page_ClientValidate().

When I add a static CustomValidator to the aspx Page (of the caller) the functions are existing. But i don't want to place a static CustomValidator on each ASPX Page that uses my Formulardesigner...

But how can i get the javascript functions added to the page at runtime? I added my javascript code for clientvalidation functions withClientScriptManager and RegisterStartupScript but how can i add the javascript functions for the CustomValidator add runtime?

Here's a very small snippet of my code:


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Web Forms :: How To Use The Customvalidator To Compare The 2 Textboxes Instead Of The Comparevalidator

May 20, 2010 01:53 PM

i have 2 texztboxes for password function. Now i want to use the customvalidator to compare the 2 textboxes instead of the comparevalidator. I used a cs code like this bloew, but it doesnt work.


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Web Forms :: CustomValidator Not Fired With Empty Text?

Feb 01, 2010 03:56 PM

I have this:

<asp:TextBox ID="tbxCustomer" runat="server" Font-Size="X-Small" Width="257px"></asp:TextBox>
<asp:CustomValidator ID="tbxCustomer_RequiredFieldValidator" runat="server" ClientValidationFunction="CheckRequiredField" ControlToValidate="tbxCustomer" EnableClientScript="true" ValidateEmptyText="true" />

So I want my javascript function fired even with empty text, but it doesn't. Is there a workaround or should just use jQuery to do this?

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Web Forms :: Button Onclick Event And Customvalidator?

Aug 19, 2009 02:13 AM

I have more than one button on my form that will check page.isvalid and trigger the ServerValidateEvent.Therefore I had hoped to somehow capture which one was clicked in my CustomValidator's ServerValidate event. I tried to set a session variiable on the onclick event of one of the buttons, before it called Page.IsValid. Howeve I have discovered that for some reason the CustomValidator's ServerValidate code is run before the OnClick event code for the button. This seems backwards to me. Can someone explain this? Or suggest how I can check which button was clicked before the ServerValidate event runs?

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Web Forms :: Adding A CustomValidator From The Code Behind File?

Mar 19, 2010 01:37 PM

I have a CheckBoxList generated from the code behind file that I want to validate with a CustomValidator.However, I don't succeed in stating the C# function that it has to use, and I can't seem to bind it to the CheckBoxList control.


and then something like:WorkCheckboxValidator.ControlToValidate = WorkScheduleCheckboxList.ToString();

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Web Forms :: CustomValidator Fires But Doesn't Stop Execution?

Oct 08, 2009 04:27 PM

I have written the code below, which is supposed to prevent duplicate values being entered (My database column is set to unnique - This is to prevent an exception)

It compiles and runs, when the button is clicked, ValidateSerialNumber runs and args.IsValid = false is hit as expected, if the certificate is null - e.g. There is no matching record already in the DB. However, the code continues to execute - What I want is the code to stop, my validation to fire and show my error message.

Note that the button/text box are within a GridView, which may be part of the problem.

WebForm Markup:


Code Behind:


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Web Forms :: CustomValidator Doesn't Validate Dropdowns Correctly?

Dec 20, 2010 02:07 PM

I have two lines of dropdown menus. There are 3 dropdown in each line (together 6). First dropdown in each line is "independent". The second and third are dependent. If user selects second, page loads and user can then selects item in third. So user have option to select first OR second and third in each line.

.ASPX code:


Since I've found out that you can't validate dropdown controls directly with CustomValidator I've wrote few lines of code for each of dropdowns to insert some values in txtBx_Cln1n2 which will be hidden when the page will be finished.


Unfortunately the code for CustomValidator have some bugs. If user doesn't select anything error message is shown. But if he choose 1 employee and then second and then select (I doubt that anybody will do this but I want to be sure and prevent as much exceptions as possible) the first item in one of the dropdowns ("all employees" or "employees by group") the custom Validator will allow execution of code for link button although the validation code should prevent this.


I know I could this a little better since code is quite complicated if I want to tell the user which employee he/she forget to enter. I've tried instead of SelectedItem.Value also SelectedIndex != 0 but the problems are the same.

I couldn't validate this without the use of textbox. But this method is also making complications since user can select 2 employees and then in one of the selected dropdown change selection to index = 0. Maybe I have to disable viewstate on all dropdowns? But this would probably affect INSERT of data?

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Web Forms :: CustomValidator Error Message Doesnt Display?

Jan 11, 2010 03:00 PM

I have a customvalidator to validate the sum of 2 drop downs.. the validation code is working, because if the sum doesnt match my logic the page is not submitted, but if i select values that match my logic, the page is submitted.. so i know the logic is working, but the error message is not working.. and not sure why..

Some background, last week i had this working based on additional controls, but the business decided they wanted less questions on the form, so all i did was remove the controls from the validation and updated the logic to make sure it was only calculating against the existing controls. reminder that the validation is working( meaning that the page is not being submitted because it failed ) but the error message doesnt display on the page, so no one knows what is happening..

Here is my code


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Web Forms :: Display A Dynamic Message With Customvalidator - Using Javascript?

Sep 26, 2003 11:23 AM

I've built a customvalidator that checks a string, against a set of disallowed words What I'd like to be able to do is change the errormessage that is displayed according to which particular word was found. Easily done on the server side, just by changing the property, but I'd like to be able to do it clientside... Currently I'm having to resort to an alert, but since all more other validation controls show their error messages on the page I'd like to continue this Here's an abridged version...

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Web Forms :: Which Event Triggers CustomValidator - OnChange Or OnClick

Dec 01, 2009 05:20 PM

As I know CustomValidator triggers in 2 events:

1 - OnChange: When I enter value in Email textbox for example, and then go to Name textbox.
2 - OnClick: When I press Button1 and postback is occurred, so CustomValidator1 tirgers.

When "myValidate" function executes, I need to check inside the body of "myValidate" function if it was called by OnChange or OnClick event. How to add OnClientClick attribute to Button1 and save there that CustomValidator1 was trigered by OnClick.


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