C# - Custom Attribute In .NET For Page_Load / Displays An Error Message?
Oct 8, 2010
I have an ASP.NET 3.5 Site where, in some places, I am checking if the currently logged on Active Directory user is in a certain AD Security Group. In the Page_Load I'm doing something like this:
if (isInADGroup(UserGUID))
{
//proceed
}
Now I was wondering, couldn't I just create a Custom Attribute, like some of MVC's security attributes, which runs this check and cancels the execution or displays an error message?
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Similar Messages:
Sep 17, 2010
I have a tag:
<asp:ListItem
CssClass="LabelCSS">Executive</asp:ListItem>
and I am getting the error message
Validation(ASP .Net):Attribute CssClass is not a valid attribute of element ListItem.
What attribute would I use for Css with ListItem?
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Feb 7, 2011
I was wondering if someone could point me in the right direction:
How do I generate a custom error page with the error message and get it to mail me that error message?
Is there a good tutorial out there that someone could point me 2.
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Jan 16, 2011
I have tried in many way but the error message for custom validator is not shown in validation summary but it(ValidationSummary) shows error message for every other type of validator.
[code]....
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Jul 2, 2012
I am trying to handle the unhandled exceptions in my project.I tried with this following code in my web.config filebut it is not at all redirecting to an error page which i have created instead of that it is throwing an exception in my code itselef. How to print the error description over therein my custom error page.
---------------------------------------------------------------------------------------------------
<sys.web>......<customErrors mode="On" defaultRedirect="~/Error.aspx"></customErrors>...</sys.web>
---------------------------------------------------------------------------------------------------
And even i tried in Global.asax page in Application_Error() method like below
Exception ex = Server.GetLastError();Response.Redirect("~/Error.aspx?errmsg="+ex.message);Server.ClearError();
And in my Error.aspx.cs page i have placed a label and i have written code like this
protected void Page_Load(object sender, EventArgs e) {
Label1.Text=Request["errmsg"];
}
But it is not getting redirected my error page and not displaying anything on it.
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Nov 3, 2010
I have a requirement that one of multiple fields is required. Using custom validator the even fires, false is returned, but no error message is display and the form validates. What am I missing? I have tried with and without ValidationSummary.
<asp:CustomValidator ID="CustomValidator1" OnServerValidate="validatePhone" EnableClientScript="false" runat="server" ErrorMessage="Home or Cell Phone is Required" ></asp:CustomValidator>
<asp:ValidationSummary ID="ValidationSummary1" DisplayMode="BulletList" runat="server" ForeColor="Red" Font-Size="X-Small" Font-Bold="true" />
protected void validatePhone(object sender, ServerValidateEventArgs e)
{
e.IsValid = string.IsNullOrEmpty(txtCellPhone.Text) && string.IsNullOrEmpty(txtHomePhone.Text) ? false : true;
}
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Jan 17, 2011
I have a custom validator:
<asp:CustomValidator ID="QuestionValidator" runat="server" ErrorMessage="Please select an option" ClientValidationFunction="QuestionValidator_ServerValidate" OnServerValidate="QuestionValidator_ServerValidate" ValidateEmptyText="true"></asp:CustomValidator>
[code]...
When I run the page, there is no validation and no error message. Please can you point out where I am going wrong, I'm suspicious it is at Page.Master.FindControl("form1").Controls.I have previously done such validation by looping through controls via form1.controls but this is unavailable as the page uses a form passed down via the master page.
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Aug 10, 2010
i ahve one custvalidator control in that i have used OnServerValidate="ValidateDateRange"
ValidateDateRange is function i have written in serverside now i want raise error message without
postback operation like (clientside validation) if that ValidateDateRange function returns
false .
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Feb 9, 2010
I have an aspx page with lots of controls on it. I am using a custom validator control (with the serverside validation). Is there a way to display the error message on the validation summary without writing Javasccript. I am a beginner in .NET and am not fluent in Javascript. This is the custom validator HTML
<asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="Invalid Date"
ControlToValidate="txtDate" OnServerValidate="ValidateDate_ServerValidate" ValidationGroup="vgSetUp"
></asp:CustomValidator>
This is the utility method am trying to validate for the entry on the UI, so that it takes dates only in these described formats If the user enters date in any other format, this method returns returns the Datetime.Mivalue(1/1/0001)
public DateTime GetFomattedDate(string dateString)
{
try
{
string[] formats = {
"MMddyyyy", // These are the accepted date formats for the UI
"MM/dd/yyyy",
"M/d/yyyy",
"yyyy/MM/dd",
"yyyy/M/d"
};
DateTime EffDate = DateTime.MinValue;
if ( DateTime.TryParseExact(dateString,formats, null, System.Globalization.DateTimeStyles.None, out EffDate))
{
return EffDate;
}
}
catch (Exception)
{
throw;
}
return DateTime.MinValue;
}
This is my customvalidator event handler(code behind)
protected void ValidateDate_ServerValidate(object source,servervalidate eventargs args)
{
args.IsValid = GetFomattedDate(args.Value) ==DateTime.MinValue? false:true;
}
I am able to validate it properly, but I cannot display the error message in the validation summary along with other messages. Anyone who is expert on Javascript can Help with the javascript function?
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Mar 22, 2011
I am using a custom validator to call a javascript function for validation. My problem is that I need to be able to change the error message dynamically. Here is the code:
<asp:CustomValidator ID="CustomValidator1" runat="server" ClientValidationFunction="fcnValid1"
ErrorMessage="" Display="None" ValidateEmptyText="True">
</asp:CustomValidator>
[code]....
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Apr 12, 2010
I am trying to passing Exception info tpa custom error page that I have created, and I'm looking for the best way to do so.I ended up creating a session object on my Global.asax page, and I pass the error data to the session object during the Application_Error event, but it throws it's own exception prior to working.
[Code]....
I have also updated my web.config with my error page that I would like to pass session object data to:
[Code]....
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Sep 17, 2012
How to show page Error msgs wen user tries to open the page , while tat page is under uploading on the sever?
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Mar 17, 2011
I have a problem with my web site 1stSigBdeAssn.org. I have made no changes to the site but I now get the following error message:
Parser Error Message:
Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.
Source Error:
[code]....
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Apr 1, 2010
I have a grid within another grid. In the detail grid I have image button for which I am giving the URL of documents in the source itself. On clicking on Image button, document can be opened for which I am using a Handler. The code for opening the document is written in the handler.This code is as below:
[code]....
The document can be opened when clicked on Image Button. but, the problem is taht after opening the document, I am unable to perform any other action in the grids.... Other actions like...selection in checkboxes(master grid contains few check boxes),other link buttons in detail grid....etc etc...I am getting the following errr:
PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled
This is because after opening any document,for any action again Handler is being called.
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Jun 19, 2010
I have a image file upload page, a zip file is uploaded and unzip on server, then all image files are read and insert into SQL server.
I want to show a message just after processed one image file, image filename, success or failed, then process next image file until finish.
What can I do?
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Sep 3, 2010
I have a gridview connected to a sql database that allows the user to delete the record. I used the ASP.net automatic "options" for this. However, I would like when the user deletes a record, a message (textbox) appears in the form to say the record has been deleted.
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Apr 19, 2010
I have forgotte password page in my application,page have one textbox to insert email address,when user click on submit button if inserted email address (i.e. abc@gmail.com) does not exits in DB it will give custome error message like "Email ID not available".after that suppose user will enter inproper email address (aaa#gmail.com) than client side validation for regular expression will file "Email id not valid",at same both message be on screen,now i want only one message at a time.so please can you help me for same
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Aug 19, 2010
i am using create user wizard and capturing other information within content template when a new userregisters. Some of the textboxes are binded to required field validators.there is a validation control on the page and ShowMessage box is True.If they dont complete some of the text boxes then the message box pops Up with the error message.It does not however include information errors like "User already exists" or Email address already existsfrom the create user wizard membership UserName and Password Textboxesis it possilbe to hook all of these up so I get one message box with all errors including membership ones?
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Apr 1, 2010
By default in login template, in case user key in the wrong user name or password, the literal message will show the default error message, "Your login attempt unsuccessful..."What i trying to do is, I have a function in my system to disapprove a member, after the member is disapproved, he/she will not allow to login anymore. When the user trying to login, the default literal msg will show out. Is there any way i can do it more specifically like if the user enter the wrong password only, the literal msg show: "Wrong password entered" insteaed of the default msg?
Same goes to the change password control, for any error msg it just show the long msg but does not tell user whats wrong with the entered valueim trying to do something like if the user enter the wrong password, the literal msg show the one i wan to show.
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Nov 11, 2013
no Massagebox not working in the web
at catch I want appear windows and retuen to....
try
{
}
catch (Exception ex) {Console.WriteLine("Error reading from", ex); }
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Aug 7, 2010
I am trying to send the message(complex type) to the message queue.I am getting the error,ETravel.Web, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.below lies the code for that.
public void QueueMessage(EmailMessage message)
{
Message msg = new Message();
msg.Body = message; [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 2, 2010
I want to create a single custom authorization attribute to be added to controller actions that require authenticated users.
My first shot at this, so I may have it all wrong
Got 3 Roles which corresponds to 3 Areas in my application (Client app, so I'll just call them RoleOne, RoleTwo, RoleThree and AreaOne, AreaTwo, AreaThree).
Each area have similiar (to a point) views and actions, like Sign Up, Area specific home, etc.
In the attribute I want to determine the current area, controller and action. Then I just add code like:
If not logged in, and in AreaOne, go to AreaOne Signup (etc)If logged in as RoleOne, and AreaOne Home is requested, go there, but if AreaTwo Home is requested ,go to AreaTwo Signup So in my attribute class I need to determine the current area, controller and action, and see what kind of user we have logged in (if any)
Using ActionExecutingContext it seems I can determine the contoller and action method names, however I cannot find the Area name, and altered the attribute to be called like this:
[Code]....
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Nov 7, 2010
I am trying to create a minimum length validation attribute which will force users to enter the specified minimum amount of characters into a textbox
public sealed class MinimumLengthAttribute : ValidationAttribute
{
public int MinLength { get; set; }
public MinimumLengthAttribute(int minLength)
{
MinLength = minLength;
}
public override bool IsValid(object value)
{
if (value == null)
{
return true;
}
string valueAsString = value as string;
return (valueAsString != null && valueAsString.Length >= MinLength);
}
}
In the constructor of the MinimumLengthAttribute I would like to set the error message as follows:
ErrorMessage = "{0} must be atleast {1} characters long"
How can I get the property's display name so that I can populate the {0} placeholder?
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Jun 6, 2010
Is it possible to access a parent class from within an attribute.
For example I would like to create a DropDownListAttribute which can be applied to a property of a viewmodel class in MVC and then create a drop down list from an editor template. I am following a similar line as Kazi Manzur Rashid here.
He adds the collection of categories into viewdata and retrieves them using the key supplied to the attribute.
I would like to do something like the below,
public ExampleDropDownViewModel {
public IEnumerable<SelectListItem> Categories {get;set;}
[DropDownList("Categories")]
public int CategoryID { get;set; }
}
The attribute takes the name of the property containing the collection to bind to. I can't figure out how to access a property on the parent class of the attribute. Does anyone know how to do this?
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