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POC# Asp.Net Create text file, zip it, and save to Blob - Without writing anything to disk
 

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  1. POC# Asp.Net Create text file, zip it, and save to Blob - Without writing anything to disk
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    <p>A complicated one here, well for me anyway :)</p> <p>Basically what i would like to achieve is to generate some text, zip this text file within two directories and then upload it to a MySQL blob field - all without writing anything to the disk. I am relatively new to all this so any pointers are greatly appreciated. Heres what i have sort of put together so far, it obviously crashes and burns but hopefully gives a better idea of what id like to do. Oh and im using DotNetZip currently :)</p> <pre><code>public void broadcastItem() { System.IO.MemoryStream ms = new System.IO.MemoryStream(); System.IO.StreamWriter sw = new System.IO.StreamWriter(ms); System.IO.MemoryStream ms2 = new System.IO.MemoryStream(); sw.Write("Some Text generated and placed in a file"); sw.Close(); //Text File Now Created using (ZipFile zip = new ZipFile()) { zip.AddDirectory(@"Directory1\Directory2"); //Zipping within two directories ZipEntry e = zip.AddEntry("Test", ms); e. e.Comment = "The content for entry in the zip file was obtained from a stream"; zip.Comment = "This zip was created at " + System.DateTime.Now.ToString("G"); zip.Save(ms2); //Trying to save to memory stream } try { OdbcConnection Server = new OdbcConnection("DSN=CentralServer"); Server.Open(); OdbcCommand DbCommand = Server.CreateCommand(); DbCommand.CommandText = "INSERT INTO blobtest(blobfield) VALUES(?)"; OdbcParameter param = new OdbcParameter("@file", SqlDbType.Binary); param.Value = ms2; DbCommand.Parameters.Add(param); DbCommand.ExecuteNonQuery(); //Trying to save zip file from memory stream to blob field } catch (Exception ex) { throw ex; } } </code></pre> <p><em><strong></em>**<em></strong> EDIT - Moving Closer <strong></em>**<em>*</em></strong></p> <p>I now can create a text file and zip it in memory, problem is the text doesnt display in the file - ie its blank i now have the file within two directories :)</p> <p>amended code below</p> <pre><code>public void test3() { MemoryStream ms = new MemoryStream(); StreamWriter sw = new StreamWriter(ms); sw.WriteLine("HELLO!"); sw.WriteLine("I WANT TO SAVE THIS FILE AS A .TXT FILE WITHIN TWO FOLDERS"); ms.Position = 0; // create the ZipEntry archive from the xml doc store in memory stream ms MemoryStream outputMS = new System.IO.MemoryStream(); ZipOutputStream zipOutput = new ZipOutputStream(outputMS); ZipEntry ze = new ZipEntry(@"Directory1\Directory2\example.txt"); zipOutput.PutNextEntry(ze); zipOutput.Write(ms.ToArray(), 0, Convert.ToInt32(ms.Length)); zipOutput.Finish(); zipOutput.Close(); byte[] byteArrayOut = outputMS.ToArray(); outputMS.Close(); ms.Close(); try { OdbcConnection rstServer = new OdbcConnection("DSN=CentralServer"); Server.Open(); OdbcCommand DbCommand = Server.CreateCommand(); DbCommand.CommandText = "INSERT INTO blobtest(blobfield) VALUES(?)"; OdbcParameter param = new OdbcParameter("@file", SqlDbType.Binary); param.Value = byteArrayOut; DbCommand.Parameters.Add(param); DbCommand.ExecuteNonQuery(); Response.Write(byteArrayOut.ToString()); } catch (Exception ex) { Response.Write(ex.ToString()); } } </code></pre>
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    2. COon this version i get Cannot access a closed Stream at zip.Save(ms2) - but im not sure if im even on the right path with this approach :(
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