Entity Framework vs LINQ to SQL

LINQ to SQL only supports 1 to 1 mapping of database tables, views, sprocs and functions available in Microsoft SQL Server. It’s a great API to use for quick data access construction to relatively well designed SQL Server databases. LINQ2SQL was first released with C# 3.0 and .Net Framework 3.5. LINQ to Entities (ADO.Net Entity … Read more

Can a Byte[] Array be written to a file in C#?

Based on the first sentence of the question: “I’m trying to write out a Byte[] array representing a complete file to a file.” The path of least resistance would be: Documented here: System.IO.File.WriteAllBytes – MSDN

Print Pdf in C#

A very straight forward approach is to use an installed Adobe Reader or any other PDF viewer capable of printing: Another way is to use a third party component, e.g. PDFView4NET

How do I save a stream to a file in C#?

I have a StreamReader object that I initialized with a stream, now I want to save this stream to disk (the stream may be a .gif or .jpg or .pdf). Existing Code: I need to save this to disk (I have the filename). In the future I may want to store this to SQL Server. … Read more

How can I download a file with batch file without using any external tools?

The answers.All scripts should be saved with .bat/.cmd extensions and can be used directly as batch scripts. Certutuil (for some reasons in the newest win10 builds this is recognized as trojan thread ):certutil.exe -urlcache -split -f “https://download.sysinternals.com/files/PSTools.zip” pstools.zip for easiness a macro can be used: CertUtil command can be abused to download a file from internet.Available by default in … Read more

What is a method group in C#?

A method group is the name for a set of methods (that might be just one) – i.e. in theory the ToString method may have multiple overloads (plus any extension methods): ToString(), ToString(string format), etc – hence ToString by itself is a “method group”. It can usually convert a method group to a (typed) delegate by using overload resolution – but not to … Read more

How to open an Excel file in C#?

You need to have installed Microsoft Visual Studio Tools for Office (VSTO). VSTO can be selected in the Visual Studio installer under Workloads > Web & Cloud > Office/SharePoint Development. After that create a generic .NET project and add a reference to Microsoft.Office.Interop.Excel via ‘Add Reference… > Assemblies’ dialog. Missing.Value is a special reflection struct … Read more

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