var items = from c in contacts select new ListItem { Value = c.ContactId, //Cannot implicitly convert type ‘int’ (ContactId) to ‘string’ (Value). Text = c.Name }; var items = from c in contacts select new ListItem { Value = c.ContactId.ToString(), //Throws exception: ToString is not supported in linq to entities. Text = c.Name }; … Read more
Is there a way to tell if an event handler has been added to an object? I’m serializing a list of objects into/out of session state so we can use SQL based session state… When an object in the list has a property changed it needs to be flagged, which the event handler took care … Read more
Why do I have to specify runat=”server” on all my ASP.NET controls when it is a mandatory attribute and server is the only option available in my limited knowledge of ASP.NET, and I get an error if I don’t use it? I do understand that I can optionally use it on my HTML tags, and … Read more
Every time I have to add a handler or module for ASP.NET with IIS7, the instructions always tell me to incorporate it into two sections: system.web and system.webserver. <system.web> <httpHandlers> </httpHandlers> <httpModules> </httpModules> </system.web> And this: <system.webServer> <modules> </modules> <handlers> </handlers> </system.webServer> What is the difference between these two sections? In addition, if I don’t … Read more
I have created a website in ASP.NET and have created a class and put it inside of the App_Code folder. However I cannot access this from my other pages. Does something need to be configured to allow this? I have made it work in previous projects, but not in this one, somehow. namespace CLIck10.App_Code { … Read more
Can somebody please explain, what the claim mechanism means in new ASP.NET Identity Core? As I can see, there is an AspNetUserLogins table, which contains UserId, LoginProvider and ProviderKey. But, I still can’t understand or find any information on when data is added to the AspNetUserClaims table and what situations this table is used for? … Read more
About 6 months ago I rolled out a site where every request needed to be over https. The only way at the time I could find to ensure that every request to a page was over https was to check it in the page load event. If the request was not over http I would … Read more
I have a DropDownList object in my web page. When I click on it and select a different value, nothing happens, even though I have a function wired up to the SelectedIndexChanged event. First, the actual object’s HTML code: <asp:DropDownList ID=”logList” runat=”server” onselectedindexchanged=”itemSelected”> </asp:DropDownList> And this is that function, itemSelected: protected void itemSelected(object sender, EventArgs … Read more
Some web projects are causing me problems while others work fine. I decided to focus on one of the problematic ones. I’m using Visual Studio 2013 on Windows 7. I think I’m running it as administrator, the window title says PROJECT NAME – Microsoft Visual Studio (Administrator). When I try to run the project I … Read more
Let’s say for example in a brand new ASP.NET MVC 5 application made from the MVC with Individual Accounts template, if I delete the Global.asax.cs class and move it’s configuration code to Startup.cs Configuration() method as follow, what are the downsides? public partial class Startup { public void Configuration(IAppBuilder app) { AreaRegistration.RegisterAllAreas(); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles); … Read more
