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Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
Regarding this .NET unhandled exception message:
5 Answers
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Fluent and Query Expression — Is there any benefit(s) of one over other?
LINQ is one of the greatest improvements to .NET since generics and it saves me tons of time, and lines of code. However, the fluent syntax seems to come much more natural to me than the query expression syntax.
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Using Server.MapPath in external C# Classes in ASP.NET
...f you're in an environment where you know it'll be executed inside the ASP.Net pipeline, you can use
HttpContext.Current.Server.MapPath()
You'll have to import System.Web though.
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What should I do if the current ASP.NET session is null?
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If you only have code in pages, you won't run into this. Most of my ASP .NET code uses Session without checking for null repeatedly. It is, however, something to think about if you are developing an IHttpModule or otherwise is down in the grittier details of ASP .NET.
Edit
In answer to the comment...
How can I remove the search bar and footer added by the jQuery DataTables plugin?
...re is filtering going on for each column, like in this example :datatables.net/release-datatables/extras/FixedColumns/… . Be aware!
– Janis Peisenieks
Apr 17 '13 at 10:45
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HtmlEncode from Class Library
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System.Web.HttpUtility was not available in my project (.NET Framework 4.7.1). System.Net.WebUtility.HtmlEncode(string) was available and worked fine.
– demonicdaron
Jul 4 '19 at 9:05
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What is the App_Data folder used for in Visual Studio?
When creating a new ASP.NET application in Visual Studio, a couple of files and folders are created automatically. One of those folders is called App_Data .
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Redirect from asp.net web api post action
I'm very new to ASP.NET 4.0 Web API. Can we redirect to another URL at the end of the POST action?, something like ... Response.Redirect(url)
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.NET - Get protocol, host, and port
Is there a simple way in .NET to quickly get the current protocol, host, and port? For example, if I'm on the following URL:
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Remove Server Response Header IIS7
...{
Response.Headers.Remove("Server");
Response.Headers.Remove("X-AspNet-Version");
Response.Headers.Remove("X-AspNetMvc-Version");
}
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