In Asp.net (c#),i'm not able to catch exception(FileNotFoundException) properly... i don't know the reason..Actually File s not there..But catch statement fails to catch the exception..
here is the code..
try
{
System.Drawing.Image imgg1 = System.Drawing.Image.FromFile(Server.MapPath("").ToString() + "\\images\\img1.jpg");
}
catch (FileNotFoundException)
{
Response.Write("<script>alert('Please Select and upload Student's Photo');</script>");
}
I'm using LinqToSql like this with a CheckBoxList in ASP.NET:
var teachers = from x in dc.teachers select x;
cbl.DataSource = teachers;
cbl.DataTextField = "name";
cbl.DataValueField = "teacherID";
cbl.DataBind();
I want to display both "firstname" and "name" in the DataTextField however.
I found this solution but I'm using LINQ:
http://stackoverflow.com/questions/839223/concatenate-two-fields-in-a-dropdown
How do I do this?
I have some DropDownList controls where the list is very large, so I would like to have a means for the user to filter the list, either based on other fields, e.g. region, or on the first letters typed in a textbox. How can I achieve this in ASP.NET? Is the an open source control out there that will help me?
I want to use a standard dialog to solicit user input of an ADO.net connection string. It is trivial to do for the oledb connection string as described here:
MSDN Article on MSDASC.DataLinks().Prompt
I've also found examples that use Microsoft.Data.ConnectionUI.dll and MicrosoftData.ConnectionUI.Dialog.dll from VS (HOWTO: Using the Choose Data Source dialog of Visual Studio 2005 from your own code).
Unfortunately these DLLs are not licensed for redistribution.
Is there a standard dialog for choosing a data source that can be distributed with my application?
Hello,
I am using the .NET 4.0 client profile for my app and I run a dual core with 4 GB Ram and a fast hard disk.
nothing big is done at the start just showing a generic List in a wpf listview.
How can I make the cold start faster of my assembly ?
Hi,
If I have an existing DataTable (already filled) but then I want to refresh/reload the data from the database directly (as I know there was a non-ADO.net process that changed data without going through the DataTable), however do I do this "refresh". Note the database data at that point can overwrite whatever is in the DataTable.
thanks
Per MSDN, calling Type.GetMethods() stores reflected method information in a MemberInfo cache so the expensive operation doesn't have to be performed again.
I have an application that scans assemblies/types, looking for methods that match a given specification. The problem is that memory consumption increases significantly (especially with large numbers of referenced assemblies) since .NET hangs onto the method metadata.
Is there any way to clear or disable this MemberInfo cache?
How do I change the BackColor of the textbox area in an asp.net DropDownList from white to another color? The Backcolor property changes only the drop down section.
i need to get an image from client and displayed(preview) before saving it into database..and then should be saved in database after getting preview..?
Is is possible in Asp.net using c#... ?
The default asp.net calendar renders with 6 displayable weeks, the last week is always the 'next' month and i dont care about it. Is there a way to display only 5 weeks?
How remove "localhost:portno" when running an asp.net website under iis?... When i browse my virtual directory i can http://localhost:120/mine/Forms/Clients.aspx.....
The AU file format is very common in the Java world. In .NET however, I found no built-in class to play this format. Did I miss something, or do I need to resort to using a third-party library?
I have a ASP.NET MVC website hosted in IIS.
Sometimes I push changes and user's browser may still using the previous files, causing functionality problems.
It is because the browser is caching those files right?
What can I do to ensure the user browser loading the updated files??
Thanks!
My group is working on a new web application and is considering using MVC. However, there are members who would rather include pages than use master pages. Is this possible to do in ASP.NET MVC? In the small amount of time that I've poked around with MVC I have not yet been able to figure out how one might accomplish that.
Is it advisable to implement url routing for an asp.net(webforms) website which is one year old... What are the factors to be considered before implementing....
Designer file is locked and when go to project properties it gives this error.
An error occurred trying to load the project properties window. Close the window and try again. The CurrentContext property of the LicenseManager is currently locked and cannot be changed.
.net framework 3.5
VS 2008
How do I attach multiple files as attachments in vb.net? I am trying to use a list box where user will select the file and attach which will appear in a listbox. And also I would like to give the option to delete the attachment also.
If you stick to managed code and standard coding (nothing that does unconventional things withe CLR) in .NET, is there any reason to manually invoke the GC or request to run finalizers on unreferenced objects?
The reason I ask is thaty I have an app that grows huge in Working Memory set. I'm wondering if calling
System.GC.Collect();
and
System.GC.RunFinalizers();
would help, and if it would force anything that wouldn't be done by the CLR normally anyways.
I want to access the raw HTML code that my ASP.NET System.Web.UI.Page is about to render.
How can i do that? Is there a property or method like System.Web.UI.Page.HTML or something like that.
I know I could loop through the Controls List of the page and get access to all the Literal Controls etc, but I was wondering if there's a direct property or method that can return me the raw html, which I can modify just before rendering the page.
I am using vb.net 2005. i am trying to set report groupings of a crystal report at runtime based on user defined options. MSDN says this:
Dim FieldDef As FieldDefinition
FieldDef =
Report.Database.Tables.Item(0).Fields.Item(comboBox1().Text)
Report.DataDefinition.Groups.Item(0).ConditionField = FieldDef
but error shows invalid group number
how to solve this?
I am using Wizard control in VS 2008. I searched the next button coding from net.vI want that if user id and password not match then wizard page should not move to the next step.
Hi,
Is there a free version of IIS to demo ASP.net applications on that will run on XP?
(i.e. or does one need a machine with Windows Server and it's license for a demo - e.g. if a prototype was built in VS2010 but one wanted to demo it on another PC)
I am using .net winforms.
I am having groupBox it contains set of controls like textbox,dropdown....
How to control the filds which is avilable in groupBox?
Example:
I need to clear all the contol fields.