How to retrieve LONGBLOB image from mysql in picturebox

Question

Hello,<br /> I need to retrieve the longblob of a picture from mysql.<br /><div> So first I insert it in the database with this:</div><div>&nbsp;<div class="dp-highlighter"><ol start="1" class="dp-c"><li class="alt"><span><span>MemoryStream&nbsp;ms&nbsp;=&nbsp;</span><span class="keyword">new</span><span>&nbsp;MemoryStream();&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment">//&nbsp;&nbsp;PIC_Image.Image.Save(ms,&nbsp;PIC_Image.Image.RawFormat);</span><span>&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">byte</span><span>[]&nbsp;img&nbsp;=&nbsp;ms.ToArray();&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">string</span><span>&nbsp;q&nbsp;=&nbsp;</span><span class="string">"insert&nbsp;into&nbsp;tb_produits&nbsp;(Image)&nbsp;values('"</span><span>&nbsp;+&nbsp;img+&nbsp;</span><span class="string">"')"</span><span>;&nbsp; <br /></span></span></li></ol></div></div><div>Here is to retrieve the picture :&nbsp;</div><div>&nbsp;<div class="dp-highlighter"><ol start="1" class="dp-c"><li class="alt"><span><span class="keyword">public</span><span>&nbsp;</span><span class="keyword">static</span><span>&nbsp;Bitmap&nbsp;ByteToImage(</span><span class="keyword">byte</span><span>[]&nbsp;blob)&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MemoryStream&nbsp;mStream&nbsp;=&nbsp;<span class="keyword">new</span><span>&nbsp;MemoryStream();&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">byte</span><span>[]&nbsp;pData&nbsp;=&nbsp;blob;&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mStream.Write(pData,&nbsp;0,&nbsp;Convert.ToInt32(pData.Length));&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Bitmap&nbsp;bm&nbsp;=&nbsp;<span class="keyword">new</span><span>&nbsp;Bitmap(mStream,&nbsp;</span><span class="keyword">false</span><span>);&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mStream.Dispose();&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return</span><span>&nbsp;bm;&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;MySqlDataAdapter&nbsp;sda&nbsp;=&nbsp;<span class="keyword">new</span><span>&nbsp;MySqlDataAdapter(</span><span class="string">"SELECT&nbsp;*&nbsp;FROM&nbsp;tb_produits&nbsp;WHERE&nbsp;Designation='"</span><span>&nbsp;+&nbsp;Designation&nbsp;+&nbsp;</span><span class="string">"'and&nbsp;Reference='"</span><span>&nbsp;+&nbsp;Reference&nbsp;+&nbsp;</span><span class="string">"'"</span><span>,&nbsp;MyConnexion);&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DataTable&nbsp;dt&nbsp;=&nbsp;<span class="keyword">new</span><span>&nbsp;DataTable();&nbsp;&nbsp;</span></span></li><li class=""><span>&nbsp;&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sda.Fill(dt);&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span><span>&nbsp;(dt.Rows.Count&nbsp;==&nbsp;1)&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">byte</span><span>[]&nbsp;img&nbsp;=&nbsp;(</span><span class="keyword">byte</span><span>[])dt.Rows[0][</span><span class="string">"Image"</span><span>];&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PIC_Image.Image&nbsp;=&nbsp;ByteToImage(img);&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp; <br /></span></li></ol></div></div><div>I tried to retrieve but I got an error: <br /> Parameter is not valid in this line " Bitmap bm = new Bitmap(mStream, false);"</div><div> </div>