Upload de arquivos em Asp.NET / C#

Comentário de André Gusmão em 21 janeiro 2009 às 12:04

Márcio, muito bom seu post, bem explicativo.
Gostaria de acrescentar mais uma coisa a ele que seria como fazer upload de arquivo para uma tabela de um banco de dados:

Basta ter uma tabela com uma coluna do tipo Image (SQL Server) ou BLOB (Oracle).
Para que possa ser gravado o arquivo binário na tabela é necessário primeiro transformá-lo em uma sequência de bytes, da seguinte forma:

string FileName = FileUpload1.PostedFile.FileName;
int FileSize = Convert.ToInt32(FileUpload1.PostedFile.InputStream.Length);
byte[] buffer = new byte[FileSize];
FileUpload1.PostedFile.InputStream.Read(buffer, 0, FileSize);

Pronto, agora a variável buffer contem um array de bytes com o conteúdo do arquivo do upload.
Agora basta gravá-lo diretamente no banco de dados, como nesse exemplo em LINQ:

MinhaTabela tbl = new MinhaTabela { campo_arquivo = buffer };
db.MinhaTabela.InsertOnSubmit(tbl);
db.SubmitChanges();

Comentário de Márcio Assis Miranda em 21 janeiro 2009 às 13:45

André, valeu pela dica.
É isso aí, agora sim ficou completíssimo.
Muitíssimo obrigado!

Comentário de Marcus Vinicius em 13 abril 2009 às 10:52

Blz Márcio,
Como poderia fazer um upload estilo FTP?
Por que tenho uma página web e gostaria que o usuário envia-se um arquivo para minha pasta especifica no servidor locaweb!! como poderia ser feito isso?
Conto com sua ajuda!!! :)

Comentário de Neida Oliva em 7 maio 2009 às 9:27

Queria que ao fazer o upload notificasse duas pessoas por email que tal arquivo foi carregado.

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