How Can I Store And Retrieve Images From A Database
Mar 23, 2008
hi,
i would like to store images in my database and retirve them aswell. i have looked at examples on the net but i am finding it hard to follow and undertsand them, can anyone please give me adivse on how i can do this. i have alrady created my table in my database which has 4 fields pictureID, pictureContent, pictureType and pictureSize but i dont know where to go on from here. i want to do it in vb aswell.
please any help and advise would be much appreciated as i am stuck,
I€™ve inherited a project from one of the guys on our team who will be out sick for a while. He developed two for marshaling data between System.Drawing.Image and System.Byte(). He€™s storing the byte array data in a database image field.
I€™ve retrieved the byte array data from his database image fields and have successfully converted them to images using his ConvertByteArrayToImage method below. I have also converted and image to a byte array with his ConvertImageToByteArray method below and succfully stored the data in a database image field. However, when I retrieve the byte array data that I stored in the database the last line in his ConvertByteArrayToImage method throws an exception (Parameter is not valid). I€™ve not been able to find a working copy of his code that€™s storing the byte array data. Does anyone see anything I€™m overlooking?
Imports System.Drawing Imports System.IO
Public Sub InsertImage(ByVal pFilename As String)
Try
Dim lImage As Image Dim lBA() As Byte Dim lSQL As String Dim lQuery As Alcon.SQLServer.Database.clsQuery Dim lParameters As New Alcon.SQLServer.Database.clsParameters
lImage = Image.FromFile(pFilename)
ConvertImageToByteArray(lImage, lBA)
' Initialization lQuery = New Alcon.SQLServer.Database.clsQuery(mConnection)
i am using sql server,asp.net and C# language.I am able to upload data into the database but couldnt retrieve it from the database.i am using the following code to upload image into the database.kindly help.
SqlConnection connection = null; try { FileUpload img = (FileUpload)imgUpload; Byte[] imgByte = null; if (img.HasFile && img.PostedFile != null) { HttpPostedFile File = imgUpload.PostedFile; imgByte = new Byte[File.ContentLength]; File.InputStream.Read(imgByte, 0, File.ContentLength); } string conn = connection establishing string; connection = new SqlConnection(conn); connection.Open(); string sql = "insert into imagetable values(@enm, @eimg) SELECT @@IDENTITY"; SqlCommand cmd = new SqlCommand(sql, connection); cmd.Parameters.AddWithValue("@enm", txtEName.Text.Trim()); cmd.Parameters.AddWithValue("@eimg", imgByte); int id = Convert.ToInt32(cmd.ExecuteScalar()); lblResult.Text = String.Format("Employee ID is {0}", id); } catch { lblResult.Text = "There was an error"; } finally { connection.Close(); }
hi everybody,can anybody help me out by telling me how could I store images in a database, and how to insert new images at run time to a database and thanks
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