f37380b9   
   XPost: microsoft.public.dotnet.languages.csharp   
   From: arne@vajhoej.dk   
      
   On 31-07-2010 20:29, Joe Cool wrote:   
   > On Jul 31, 8:02 pm, Arne Vajhøj  wrote:   
   >> On 31-07-2010 19:36, Joe Cool wrote:   
   >>   
   >>   
   >>   
   >>   
   >>   
   >>> I am cross posting this request for help in both the C#,NET and the   
   >>> SQLServer newsgroups in he hope that some reader of one these   
   >>> newsgroups can offer some help.   
   >>   
   >>> I am well aware that the image datatype (as well as others) are being   
   >>> phased out in some future version of SQL Server. For that reason, in   
   >>> all of my personal C#.NET projects that store images use the   
   >>> varbinary(max) datatype.   
   >>   
   >>> I am in the process of converting a VB.NET project that I use for   
   >>> consulting work with a former (and hopefully soon to be repeat)   
   >>> employer tp C#.NET. When originally designed, their software was based   
   >>> on SQL7. Currently their software supports SQL2005. One key table in   
   >>> their database is a table of images and (not sure if it still does)   
   >>> but legacy databases utilize the image datatype to store images. With   
   >>> SQL7 I used a SQL command line utility called TEXTCOPY to extract the   
   >>> binary content of image columns to a JPG file.   
   >>   
   >>> This utility needs to be able to extract these images to external   
   >>> files even for legacy databases that may still use the image datatype.   
   >>> But I find that the technique I use to extract images from a   
   >>> varbinary(max) column doesn't work for image datatypes. And I see that   
   >>> SQL2005, while it still supports image datatype, the TEXTCOPY utility   
   >>> is nowhere to be found.   
   >>   
   >>> Any ideas on how to extract image data types from a SQL2005 database   
   >>> with C#.NET?   
   >>   
   >> Have you tried the obvious: SqlConnection, SqlCommand, SELECT,   
   >> ExecuteReader, SqlDataReader og læse kolonnen som byte[] ?   
   >   
   > Here is what I am using that works with varbinary(max) datatype   
   > columns.   
   >   
   > SqlCommand cmd;   
   > SqlDataReader rdr;   
   > DataTable dataTable;   
   >   
   > cmd = new SqlCommand("select imagecolumn, linkcolumn from images",   
   > cn)'   
   > rdr = cmd.ExecuteReader();   
   > dataTable.Load(rdr);   
      
   Drop the data table and try:   
      
   while(rdr.Read())   
   {   
        byte[] image = (byte[])rdr[0];   
        string link = (string)rdr[1];   
        // process image and link   
   }   
      
   Arne   
      
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