我搜索了很多并尝试了各种方法,但无法解决这个问题.
我需要将图像保存到 mysql文件中.
我需要将图像保存到 mysql文件中.
try { string location = @"C:\Users\test\Downloads\Photos\batman-greenscreen.jpg"; FileStream fs = new FileStream(location,FileMode.Open,FileAccess.Read); UInt32 fileLength = (UInt32)fs.Length; byte[] buffer = new byte[fileLength]; fs.Read(buffer,(int)fileLength); string sqlPhotoQuery = "INSERT INTO tab_photo VALUES('" + photo.PhotoId + "','" + photo.ProjectID + "','" + photo.Day + "','" + photo.Barcode + "','" + photo.Photoname + "','" + photo.PhotoXml + "','" + buffer + "','" + fileLength + "')"; int result = MysqLHelper.ExecuteNonQuery(connectionString,sqlPhotoQuery); if (result > 0) return true; else return false; } catch (Exception e) { return false; }
在此文件中图像长度为12428,
我试图从数据库中检索数据:
Photo photo = new Photo(); try { string sqlQuery = "SELECT * FROM tab_photo where PhotoId='"+photoId+"'"; MysqLDataReader rdr = MysqLHelper.ExecuteReader(connectionString,sqlQuery); while (rdr.Read()) { photo.PhotoId = rdr.GetString("PhotoId"); photo.ProjectID = rdr.GetString("ProjectID"); photo.Day = rdr.GetInt32("Day"); photo.Barcode = rdr.GetString("Barcode"); photo.Photoname = rdr.GetString("Photoname"); photo.PhotoXml = rdr.GetString("PhotoXml"); MemoryStream ms; UInt32 FileSize; Bitmap outimage; int fileSize = rdr.GetInt32(rdr.Getordinal("PhotoSize")); byte[] rawData = new byte[fileSize]; rdr.GetBytes(rdr.Getordinal("Photo"),rawData,(Int32)fileSize); photo.imageByte = rawData; } } catch (Exception e) {}
但是当我检索文件时,它只检索前13个字节.之后,它的值为零,并且检索值存在差异.
我遵循了Handling BLOB Data With Connector/Net中提到的说明.
根据我已经改变我的设置如下:
这是数据保存在数据库中的方式
我无法获得正确值的原因是什么?在数据保存或数据检索或数据库配置方面有任何问题吗?