Unable to cast object of type 'System.String' to type 'System.Byte[]'.

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ASP.NET

Hi,

Can anyone know?

Unable to cast object of type 'System.String' to type 'System.Byte[]'.how to solve this error?

this is the code...i have insert image and all things but it shows the above error....help me..

public void ProcessRequest (HttpContext context)
   {
       //SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["Connection"].ConnectionString);
       SqlConnection cn = new SqlConnection(ConfigurationManager.AppSettings["constring"].ToString());
       cn.Open();

       string sql = "Select clogo from tbl_company where cid=@cid";
       SqlCommand cmd = new SqlCommand(sql, cn);
       cmd.Parameters.Add("@cid", SqlDbType.Int).Value = context.Request.QueryString["cid"];
       cmd.Prepare();
       SqlDataReader dr = cmd.ExecuteReader();
       dr.Read();
       //context.Response.ContentType = dr["imagename"].ToString();
       context.Response.BinaryWrite((byte[])dr["clogo"]);
       dr.Close();
       cn.Close();

   }