问题描述
PrivateSubButton8_Click(senderAsObject,eAsEventArgs)HandlesButton8.Clickds.Tables("tp1").Clear()da=NewSqlDataAdapter("select*from产品库where产品ID='"&ComboBox1.Text&"'",cnn)da.Fill(ds,"tp1")Dimdata1()AsByte=CType(ds.Tables("tp1").Rows(0)("工艺图"),Byte())Ifdata1.Length<>0ThenDimmstream1AsNewMemoryStream(data1)PictureBox1.Image=NewBitmap(mstream1)EndIfEndSub
解决方案
解决方案二：
PrivateSubButton8_Click(senderAsObject,eAsEventArgs)HandlesButton8.Clickds.Tables("tp1").Clear()da=NewSqlDataAdapter("select*from产品库where产品ID='"&ComboBox1.Text&"'",cnn)da.Fill(ds,"tp1")Dimdata()AsByte=CType(ds.Tables("tp1").Rows(0)("工艺图"),Byte())Ifdata.Length<>0ThenDimmstreamAsNewMemoryStream(data)PictureBox1.Image=NewBitmap(mstream)‘提示mstream参数无效mstream.Close()EndIfEndSub
解决方案三：
无法将Stream转为bitmap貌似就会报这个错。感觉语法貌似没啥问题，会不会是data格式不对，无法转成图片呢
解决方案四：
PublicFunctionGetImage(ByValbDataAsByte())AsImageTryUsingfStreamAsStream=NewMemoryStream(bData.Length)DimbWriterAsNewBinaryWriter(fStream)bWriter.Write(DirectCast(bData,Byte()))bWriter.Flush()DimbitMapAsNewSystem.Drawing.Bitmap(fStream)bWriter.Close()fStream.Close()DimiImageAsImage=System.Drawing.Image.FromHbitmap(bitMap.GetHbitmap())ReturniImageEndUsingCatcheAsSystem.IO.IOExceptionThrowNewException(e.Message&"Readimagedataerror!")EndTryEndFunction
PictureBox1.Image=GetImage(data1())试下这种方法。
解决方案五：
DimattachData()AsByteattachData=imgSelector.DataTable.Rows(0)(0)DimattachStream=NewIO.MemoryStream(attachData)DimImage1AsImage=Image.FromStream(attachStream)attachStream.Close()