C# – How to save a stream to a file in C#

cnetstream

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:

StreamReader sr = new StreamReader(myOtherObject.InputStream);

I need to save this to disk (I have the filename).
In the future I may want to store this to SQL Server.

I have the encoding type also, which I will need if I store it to SQL Server, correct?

Best Answer

As highlighted by Tilendor in Jon Skeet's answer, streams have a CopyTo method since .NET 4.

var fileStream = File.Create("C:\\Path\\To\\File");
myOtherObject.InputStream.Seek(0, SeekOrigin.Begin);
myOtherObject.InputStream.CopyTo(fileStream);
fileStream.Close();

Or with the using syntax:

using (var fileStream = File.Create("C:\\Path\\To\\File"))
{
    myOtherObject.InputStream.Seek(0, SeekOrigin.Begin);
    myOtherObject.InputStream.CopyTo(fileStream);
}

Related Solutions

C# – How to calculate someone’s age based on a DateTime type birthday

An easy to understand and simple solution.

// Save today's date.
var today = DateTime.Today;

// Calculate the age.
var age = today.Year - birthdate.Year;

// Go back to the year in which the person was born in case of a leap year
if (birthdate.Date > today.AddYears(-age)) age--;

However, this assumes you are looking for the western idea of the age and not using East Asian reckoning.

C# – How to cast int to enum

From an int:

YourEnum foo = (YourEnum)yourInt;

From a string:

YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);

// The foo.ToString().Contains(",") check is necessary for enumerations marked with an [Flags] attribute
if (!Enum.IsDefined(typeof(YourEnum), foo) && !foo.ToString().Contains(","))
{
    throw new InvalidOperationException($"{yourString} is not an underlying value of the YourEnum enumeration.")
}

Update:

From number you can also

YourEnum foo = (YourEnum)Enum.ToObject(typeof(YourEnum) , yourInt);

Best Answer

Related Solutions

C# – How to calculate someone’s age based on a DateTime type birthday

C# – How to cast int to enum

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