Download file byte array c#

ToArray the file is generated without a problem. Hope this helps someone. AlexandrePires That is because MemoryStream. GetBuffer actually returns the MemoryStream's buffer, which is usually larger than the stream's content to make insertions efficient.

ToArray returns the buffer truncated to the content size. Please stop doing this. This sort of abuse of MemoryStream causes, unscalable code and completely ignores the purpose of Streams.

Think: why isn't everything just exposed as byte[] buffers instead? Your users can easily run your application out of memory. Show 10 more comments. Nkosi k 31 31 gold badges silver badges bronze badges. Ogglas Ogglas Good update to show IHttpActionResult return type. A refactor of this code would be to move call a custom IHttpActionResult such as the one listed at: stackoverflow.

This post demonstrates a nice tidy single use implementation. In my case, the helper method listed in the above link proved more helpful — hanzolo. If you vote down please say why, hard to improve answers otherwise.

I think you can only use stream. GetBuffer , 0, checked int stream. The internal buffer array may be longer than the actual contents so specifying the content length is necessary. Open ; result. GetFileName path ; result. Here you are using FileStream for an existing file on the server. It is a bit different from MemoryStream. But thanks for the input. If you do read from a file on a web server, be sure to use the overload for FileShare.

Read, otherwise you may encounter file in use exceptions. Here we will be returning or downloading an Excel file. Using the below technique Controller can return any other types of images like. You cal also use the File class for file processing. Please see the below example to achieve the same. As we know FileResult is an abstract base class. FileStreamResult — Sends binary content to the response by using a Stream instance. Here you have a stream and want to return stream content as a file.

FileContentResult — Sends the contents of a binary file to the response. Here you have a byte array and want to return byte content as a file. Below are a few examples of MIME — content types for your information. Make sure you provide a valid email address else you won't be notified when the author replies to your comment Please note that all comments are moderated and will be deleted if they are Not relavant to the article Spam Advertising campaigns or links to other sites Abusive content.

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Please refer Privacy Policy for more details. Got it. Several C features aid in the construction of robust and durable applications: Garbage collection automatically reclaims memory occupied by unused objects; exception handling provides a structured and extensible approach to error detection and recovery; and the type-safe design of the language makes it impossible to read from uninitialized variables, to index arrays beyond their bounds, or to perform unchecked type casts.

C has a unified type system. All C types, including primitive types such as int and double , inherit from a single root object type. Thus, all types share a set of common operations, and values of any type can be stored, transported, and operated upon in a consistent manner. Furthermore, C supports both user-defined reference types and value types, allowing dynamic allocation of objects as well as in-line storage of lightweight structures.

To ensure that C programs and libraries can evolve over time in a compatible manner, much emphasis has been placed on versioning in C 's design. Many programming languages pay little attention to this issue, and, as a result, programs written in those languages break more often than necessary when newer versions of dependent libraries are introduced. Aspects of C 's design that were directly influenced by versioning considerations include the separate virtual and override modifiers, the rules for method overload resolution, and support for explicit interface member declarations.

The rest of this chapter describes the essential features of the C language. Although later chapters describe rules and exceptions in a detail-oriented and sometimes mathematical manner, this chapter strives for clarity and brevity at the expense of completeness. The intent is to provide the reader with an introduction to the language that will facilitate the writing of early programs and the reading of later chapters.

The "Hello, World" program is traditionally used to introduce a programming language. Here it is in C :. C source files typically have the file extension. Assuming that the "Hello, World" program is stored in the file hello. The output produced by this application when it is run is.

The "Hello, World" program starts with a using directive that references the System namespace. Namespaces provide a hierarchical means of organizing C programs and libraries. Namespaces contain types and other namespaces—for example, the System namespace contains a number of types, such as the Console class referenced in the program, and a number of other namespaces, such as IO and Collections.

A using directive that references a given namespace enables unqualified use of the types that are members of that namespace. Because of the using directive, the program can use Console. WriteLine as shorthand for System. The Hello class declared by the "Hello, World" program has a single member, the method named Main. The Main method is declared with the static modifier. While instance methods can reference a particular enclosing object instance using the keyword this , static methods operate without reference to a particular object.

By convention, a static method named Main serves as the entry point of a program. The output of the program is produced by the WriteLine method of the Console class in the System namespace. This class is provided by the. NET Framework class libraries, which, by default, are automatically referenced by the Microsoft C compiler. Note that C itself does not have a separate runtime library.

Instead, the. NET Framework is the runtime library of C. The key organizational concepts in C are programs , namespaces , types , members , and assemblies. C programs consist of one or more source files. Programs declare types, which contain members and can be organized into namespaces. Classes and interfaces are examples of types. Fields, methods, properties, and events are examples of members. When C programs are compiled, they are physically packaged into assemblies.

Assemblies typically have the file extension. The fully qualified name of this class is Acme. The class contains several members: a field named top , two methods named Push and Pop , and a nested class named Entry. The Entry class further contains three members: a field named next , a field named data , and a constructor. Assuming that the source code of the example is stored in the file acme. Assemblies contain executable code in the form of Intermediate Language IL instructions, and symbolic information in the form of metadata.

Because an assembly is a self-describing unit of functionality containing both code and metadata, there is no need for include directives and header files in C. The public types and members contained in a particular assembly are made available in a C program simply by referencing that assembly when compiling the program.

For example, this program uses the Acme. Stack class from the acme. If the program is stored in the file test. This creates an executable assembly named test. C permits the source text of a program to be stored in several source files. When a multi-file C program is compiled, all of the source files are processed together, and the source files can freely reference each other—conceptually, it is as if all the source files were concatenated into one large file before being processed.

Forward declarations are never needed in C because, with very few exceptions, declaration order is insignificant. C does not limit a source file to declaring only one public type nor does it require the name of the source file to match a type declared in the source file.

There are two kinds of types in C : value types and reference types. Variables of value types directly contain their data whereas variables of reference types store references to their data, the latter being known as objects.

With reference types, it is possible for two variables to reference the same object and thus possible for operations on one variable to affect the object referenced by the other variable.

With value types, the variables each have their own copy of the data, and it is not possible for operations on one to affect the other except in the case of ref and out parameter variables.

C 's value types are further divided into simple types , enum types , struct types , and nullable types , and C 's reference types are further divided into class types , interface types , array types , and delegate types. The eight integral types provide support for 8-bit, bit, bit, and bit values in signed or unsigned form.

The two floating point types, float and double , are represented using the bit single-precision and bit double-precision IEEE formats. The decimal type is a bit data type suitable for financial and monetary calculations. C 's bool type is used to represent boolean values—values that are either true or false. Character and string processing in C uses Unicode encoding. C programs use type declarations to create new types. A type declaration specifies the name and the members of the new type.

Five of C 's categories of types are user-definable: class types, struct types, interface types, enum types, and delegate types. A class type defines a data structure that contains data members fields and function members methods, properties, and others. Class types support single inheritance and polymorphism, mechanisms whereby derived classes can extend and specialize base classes.

A struct type is similar to a class type in that it represents a structure with data members and function members. However, unlike classes, structs are value types and do not require heap allocation.

Struct types do not support user-specified inheritance, and all struct types implicitly inherit from type object. An interface type defines a contract as a named set of public function members. A class or struct that implements an interface must provide implementations of the interface's function members. An interface may inherit from multiple base interfaces, and a class or struct may implement multiple interfaces. A delegate type represents references to methods with a particular parameter list and return type.

Delegates make it possible to treat methods as entities that can be assigned to variables and passed as parameters. Delegates are similar to the concept of function pointers found in some other languages, but unlike function pointers, delegates are object-oriented and type-safe.

Class, struct, interface and delegate types all support generics, whereby they can be parameterized with other types. An enum type is a distinct type with named constants. Every enum type has an underlying type, which must be one of the eight integral types. The set of values of an enum type is the same as the set of values of the underlying type. C supports single- and multi-dimensional arrays of any type. Unlike the types listed above, array types do not have to be declared before they can be used.

Instead, array types are constructed by following a type name with square brackets. For example, int[] is a single-dimensional array of int , int[,] is a two-dimensional array of int , and int[][] is a single-dimensional array of single-dimensional arrays of int.

Nullable types also do not have to be declared before they can be used. For each non-nullable value type T there is a corresponding nullable type T? For instance, int? C 's type system is unified such that a value of any type can be treated as an object. Every type in C directly or indirectly derives from the object class type, and object is the ultimate base class of all types. Values of reference types are treated as objects simply by viewing the values as type object. Values of value types are treated as objects by performing boxing and unboxing operations.

In the following example, an int value is converted to object and back again to int. When a value of a value type is converted to type object , an object instance, also called a "box," is allocated to hold the value, and the value is copied into that box.

Conversely, when an object reference is cast to a value type, a check is made that the referenced object is a box of the correct value type, and, if the check succeeds, the value in the box is copied out. C 's unified type system effectively means that value types can become objects "on demand.

There are several kinds of variables in C , including fields, array elements, local variables, and parameters. Variables represent storage locations, and every variable has a type that determines what values can be stored in the variable, as shown by the following table. Expressions are constructed from operands and operators. The operators of an expression indicate which operations to apply to the operands.

Examples of operands include literals, fields, local variables, and expressions. When an expression contains multiple operators, the precedence of the operators controls the order in which the individual operators are evaluated.