how can i remove the flaw..

string repname = "";
string rowsid = GlobalClass.rowsID;
if (chk_toref.Checked) { repname = txtCollectorName.Text.Trim(); } else { repname = lblName.Text; }
SaveImgName = "In" + "+" + repname + "+" + GlobalClass.rowsID + ".jpg";
string imgpath = (@"C:");
pictureBox1.Image = Image.FromFile( imgpath+ @"\Signature\" + SaveImgName);
DataConnection data = new DataConnection();
SqlConnection con;
con = data.GetConnection();
con.Open();
SqlCommand sqlCmd = new SqlCommand("update tblinbound set Signature=@img where id=@rowsid",con);
sqlCmd.Parameters.AddWithValue("@rowsid", rowsid);
 String sBLOBFilePath=imgpath+@"\Signature\"+SaveImgName; 
FileStream fsBLOBFile = new FileStream(sBLOBFilePath, FileMode.Open, FileAccess.Read);
Byte[] bytBLOBData = new Byte[fsBLOBFile.Length];
fsBLOBFile.Read(bytBLOBData, 0, bytBLOBData.Length);
fsBLOBFile.Close();
SqlParameter prm = new SqlParameter("@img", System.Data.SqlDbType.VarBinary, bytBLOBData.Length, System.Data.ParameterDirection.Input, false,
0, 0, null, System.Data.DataRowVersion.Current, bytBLOBData);
sqlCmd.Parameters.Add(prm);
sqlCmd.ExecuteNonQuery();
con.Close();