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0x504b0304 imagetype sql server12/20/2023 If anyone is able to determine the encoding, let me know. I made the following correction, and it works! zis.Read(buffer, 0, = buffer Īt this point I am only able to process FORMAT-ZIPV3 data, as I haven't figured out how to decode the FORMAT-ZIP2 strings yet. Maybe that's what the value property typically shows for byte arrays? I'm so close and yet so far away. The value for buffer variable shows the length of the byte array, rather than the actual bytes. I just cannot figure out how to get that into the image type parameter. It appears to be reading the data from the source text column just fine. ZipEntry zipEntry = zis.GetNextEntry() // Doesn't seem to work unless an entry has been referencedīyte buffer = new = zis.Read(buffer, 0, buffer.Length) Using (var zis = new ZipInputStream(new MemoryStream(bytes))) Var s = reader.ToString().Substring(offset) īytes = ConvertStringToBytes(s) // Not a Base-64 encoded string? External conversion function utilized. Var offset = 13 //"FORMAT-ZIPV3 ".Length String format = reader.ToString().Substring(0, 12) commandUncompressed.Connection = SqlDbType.VarChar, SqlDbType.Image) ĬommandUncompressed.CommandText = sqlSaveImage Ĭonsole.WriteLine(reader.ToString()) // Merely for testing It appears to be placing the length of the byte array into the byte array's value. Executing the following code produces the error, "Failed to convert parameter value from a Int32 to a Byte". Looking at this data, would anyone have any insight on how this image data has been manipulated? Again, I need to get the uncompressed image data into a column of a data type conducive to reading for display on a web page.ĮDIT: Ok, I'm stumped. It appears that the format information was added to the beginning of the data prior to inserting. What I know for certain is that the images were compressed at some point in the process using SharpZip before being inserted into the table. It appears as follows (text column abbreviated for display): ImageID ImageDataġ FORMAT-ZIPV3 UEsDBBQAAAAIAOV6wzxdTnDvshs.Ģ FORMAT-ZIPV3 UEsDBBQAAAAIAAF2yjxGncjOLgA.ģ FORMAT-ZIPV3 UEsDBBQAAAAIAKd6yjyjnQNr6gg.Ĥ FORMAT-ZIPV3 UEsDBBQAAAAIALdNyzyrPC8EMJw.ĥ FORMAT-ZIPV3 UEsDBBQAAAAIAA1rOD1nZY1t0f0.Ħ FORMAT-ZIPV3 UEsDBBQAAAAIANZplj2seyJ+VmM.ħ FORMAT-ZIPV3 UEsDBBQAAAAIAC5vhD27LPbPcv8.Ĩ FORMAT-ZIPV3 UEsDBBQAAAAIAK1qKz5DJNH3xMg.ĩ FORMAT-ZIPV3 UEsDBBQAAAAIAHVkEztC3th/9hs.ġ0 FORMAT-ZIPV3 UEsDBBQAAAAIAEtXKz7DXHUdvow. A code snippet illustrating this or a link to a relevant resource would be much appreciated.ĮDIT: A bit more information - the data is stored in a TEXT column. I can't find anything that covers unzipping from a variable to another variable. I am using the SharpZip library, and all of the examples deal with file sources and destinations. I need to read the row, unzip the image and store it in an image column in another table. bmp, etc.) stored as compressed text in a text column in a SQL Server 2005 table.
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