reading images from database

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hi
in a tabel i have a field which its name is images.this tabel have many records.
i dont know how i can read all images from this tabel.
this code just take me 1 image;the first one:

C#

string strselect="SELECT bannerImg FROM tb_banner" ;

SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["dbtestConnectionString"].ConnectionString);
        SqlCommand sqlcom1 = new SqlCommand(strselect, sqlcon);
        sqlcon.Open();
        
        object img=sqlcom1.ExecuteScalar();
        
        if (img=!null)
        {
            Response.BinaryWrite((byte[])img);
            sqlcon.Close();
        }

Posted 16-Jan-12 20:48pm

maliheSadat

Updated 16-Jan-12 21:12pm

Anuja Pawar Indore

v2

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Anuja Pawar Indore 17-Jan-12 3:12am

Added pre tag

3 solutions

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OriginalGriff · Answer 1 · 2012-01-16T20:52:00

Solution 1

It's not difficult - you can see how I do it here: A generic Image-From-DB class for ASP.NET[^]

Posted 16-Jan-12 20:52pm

OriginalGriff

*dan!sh* · Answer 2 · 2012-01-16T21:54:00

Solution 2

You are using ExecuteScalar while I guess it should ExecuteReader.

Posted 16-Jan-12 21:54pm

dan!sh

Comments

maliheSadat 17-Jan-12 5:20am

i use ExecuteScalar because the output of select is one parameter(bannerImg)

dan!sh 17-Jan-12 6:14am

ExecuteScalar is not about number of columns. It is number of values that are returned. You need multiple rows so ExecuteReader is the way to go.

Rakesh Meel · Answer 3 · 2012-01-16T22:03:00

VB

Function SaveImage _
   (ByVal FileName As String) As Integer

   ' Create a FileInfo instance
   ' to retrieve the files information
   Dim fi As New FileInfo(FileName)

   ' Open the Image file for Read
   Dim imgStream As Stream = _
      fi.OpenRead

   ' Create a Byte array the size
   ' of the image file for the Read
   ' methods buffer() byte array
   Dim imgData(imgStream.Length) As Byte
   imgStream.Read(imgData, 0, fi.Length)

   Dim cn As New SqlConnection _
      (ConfigurationSettings.AppSettings("cn"))
   Dim cmd As New SqlCommand("Images_ins", cn)
   cmd.CommandType = CommandType.StoredProcedure

   With cmd.Parameters
      .Add("@FileName", VarChar, 100).Value = _
         fi.Name
      .Add("@FileType", VarChar, 10).Value = +
         fi.Extension
      .Add("@Image", Image).Value = imgData
      .Add("@FileSize", Int, 4).Value = fi.Length
   End With

   cn.Open()
   cmd.ExecuteNonQuery()
   cn.Close()
   cn.Dispose()
End Function