Read image file / blob from binary field in MS SQL database

This article “How To Read and Write BLOB Data by Using ADO.NET with Visual C# .NET” in 2004 somehow it is still pretty handy. 


The reading from binary field part below is put in VS 2010 and SQL Server 2008 R2.


protectedvoid btnReadBBlob_Click(object sender, EventArgs e)


  SqlConnection con = newSqlConnection(“Data Source=.\\SQLEXPRESS;Initial Catalog=MyImage;Integrated Security=True”);

  SqlDataAdapter da = newSqlDataAdapter(“Select * From MyImages”, con);

  SqlCommandBuilder MyCB = newSqlCommandBuilder(da);

  DataSet ds = newDataSet(“MyImages”);


  byte[] MyData = newbyte[0];


  da.Fill(ds, “MyImages”);

  DataRow myRow;

  myRow = ds.Tables[“MyImages”].Rows[0];


  MyData = (byte[])myRow[“imgField”];

  int ArraySize = newint();

  ArraySize = MyData.GetUpperBound(0);


  FileStream fs = newFileStream(@”C:\VCSharpTemp\WebAppWriteBlog\WebAppWriteBlog\Lighthouse1.jpg”, FileMode.OpenOrCreate, FileAccess.Write);

 fs.Write(MyData, 0, ArraySize);




Download the complete code from The sample file name is WebAppOnlyReadBlob.rar. My MSN ID is



Write image file / blob to binary field in MS SQL database


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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One Response to Read image file / blob from binary field in MS SQL database

  1. Pingback: Write image file / blob to binary field in MS SQL database | Chanmingman's Blog

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