How Can I Read An Image Which Is In The MSSQL Server Database?
Aug 23, 2005How can I read an Image which is in the MSSQL Server database?
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Read Image From Sql Server
Aug 6, 2007Hello!
My real problem is that i want to read an image from an Sql Server DB, resize them and send them, all this through a Web Service. I decide to split my problem in four steps:
1 - read image from Database
2 - Resize that image
3 - Send her back to the DB
4 - Send the image throw a web service after he use a dataset to read the data from the DB.
i try to read the database with this function
Code Snippet
public System.Drawing.Image ReadImgFromDB(Int64 imageID)
{
System.Drawing.Image image = null;
using (SqlConnection conn = new SqlConnection())
{
string connString = WebConfigurationManager.ConnectionStrings
["StringCC"].ConnectionString;
conn.ConnectionString = connString;
SqlCommand myCommand = new SqlCommand(
"SELECT Pic FROM Images WHERE ID='"+ imageID +"'", conn);
conn.Open();
byte[] imageData = (byte[])myCommand.ExecuteScalar();
System.IO.MemoryStream memStream = new System.IO.MemoryStream(imageData);
image = System.Drawing.Image.FromStream(memStream);
}
return image;
}
i introduce a valid image ID and i get this message
--- " System.ArgumentException: Parameter is not valid.
at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData)
at System.Drawing.Image.FromStream(Stream stream)
at Service.ReadImgFromDB(Int64 chaveI) in e:Web ProjectsWSserviceApp_CodeService.cs:line 48"-----
line 48: "image = System.Drawing.Image.FromStream(memStream);"
Thank you!
Read Image Data From SQL Server
Sep 19, 2007Here is my task I am storing pdf's in sql server. I would like to retrieve the binary data from sql server and write the pdf content into an existing aspx page to the appropriate pageview section. What is the best way to handle this. The code works below but it loads a new browser with the content. I need it to appear in it's tabbed section in the original aspx file. Any assistance you can give me would be greatly appreciated.
Thanks Jerry
oSQLConn.Open()Dim myreader As SqlDataReader
myreader = myCommand.ExecuteReader
Response.Expires = 0
Response.Buffer = True
Response.Clear()
Do While (myreader.Read())
Response.ContentType = ("application/pdf")Response.BinaryWrite(myreader.Item("img_content"))
Loop
Image Data Read From SQL Server Does Not Show Up
Mar 4, 2004Hi Guys,
I've been strugling with this problem all morning today.
Basically I store images in SQL Server 2000 database and then whould like to show them with
<img src="viewImage.aspx?image_id=10" border=1>
My table structure is setup this way
TABLE [userImages] (
[imageFilename] [nvarchar] (128) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[imageContentType] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[imageFileSize] [bigint] NULL ,
[imageFileImage] [image] NULL )
and in viewImage.aspx I have:
if (dr.Read())
{
Response.ContentType = dr.GetString(dr.GetOrdinal("imageContentType"));
Response.BinaryWrite( (byte[]) dr["imageFileImage"] );
}
I have no prolems retrieving the data from DB. But the image does not display(in IE it shows a broken link image)
What's even more puzzling is I CAN display the same image from HDD like so:
FileStream fs = File.OpenRead("D:\my_image.png");
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();
Response.ContentType = "application/octet-stream";
Response.BinaryWrite(buffer);
Am I missing something very obvious. I tried playing around with different ContentType's same result.
In my case I am forced to store images in the DB.
I've seen other examples on the net and theirs work. Please help.
Sincerely,
Vlad Orlovsky
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Oct 19, 2006I was wondering if it is possible to read image data from a database in .net compact framework. Since cf does not have image.fromstream(memstream) to work with, I don't know how else to read the image from the database and then place it into a picturebox.
Here is the code I have been trying out:
Dim Img As Image
'
Dim conn As New SqlCeConnection("Data Source = My Documents est2.sdf")
conn.Open()
Dim sql As String = "SELECT * FROM Dater"
Dim cmd As New SqlCeCommand(sql, conn)
Dim reader As SqlCeDataReader = _
cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection)
While reader.Read()
TextBox1.Text = reader.Item("name")
Dim b(reader.GetBytes(1, 0, Nothing, 0, Integer.MaxValue) - 1) As Byte
reader.GetBytes(1, 0, b, 0, b.Length)
Dim ms As New System.IO.MemoryStream(b)
Dim bmp As New Bitmap(ms) <-Error: Value does not fall within expected range
Img = bmp
End While
PictureBox2.Image = Img
I get an error ,Value does not fall within expected range.
Does this mean the image was not save correctly in the database?
Thanks for any help
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Aug 17, 2007
Hi,
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my upload table has the folliwing feilds
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any help will appreciated....
Regards
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Hello,
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public static Image Bytes2Image(byte[] bytes)
{
if (bytes == null) return null;
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ms.Read(bytes, 0, bytes.Length);
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}
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Dim info= "this is a des."
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