blob | 易学教程

Angular中ngx-image-cropper图片裁剪的使用

阅读更多关于 Angular中ngx-image-cropper图片裁剪的使用

GitHub示例源码地址： https://github.com/luoruiemail/ngx-image-cropper 下载下来之后，执行 yarn install 安装相关node_modules包然后在目录执行 npm start 浏览器中访问 http://localhost:4200/ 就可以看到示例效果了 ↓ 代码如下↓ 将 ImageCropperModule 添加到模块的导入中，若未安装此包，在 Windows PowerShell 中执行 yarn add ngx-image-cropper 即可 1 import { BrowserModule } from '@angular/platform-browser'; 2 import { NgModule } from '@angular/core'; 3 4 import { AppComponent } from './app.component'; 5 import { ImageCropperjsComponent } from './cropperjs/image-cropperjs/image-cropperjs.component'; 6 import { ImageCropperModule } from 'ngx-image-cropper'; 7 8 @NgModule({ 9

When is using MySQL BLOB recommended?

阅读更多关于 When is using MySQL BLOB recommended?

问题 I\'m coding an application that will be uploading and deleting many files, i usually just move the files to a folder in the server naming them with the row unique id . But as i understand MySQL also lets me store binary data (files) when would this be a better choice?. Please use solid arguments, like When does using BLOB will mean performance improvement?. P.S: I\'m using MyISAM if that matters. Thanks. UPDATE: Related questions : - Storing Images in DB - Yea or Nay? - To Do or Not to Do:

Store image to database blob; retrieve from db into Picturebox

阅读更多关于 Store image to database blob; retrieve from db into Picturebox

Hi I posted this earlier and got some help but still no working solution. I have determined thanks to the last q & a that there is something wrong with my "save to db" code as well as my "retrieve to picture" code. Even If I manually save the pic in the db it stil wont retreive. This is code i patched together from 3 or 4 examples around the net. Ideally if someone had some known good code and could direct me to it that would be the best. Dim filename As String = txtName.Text + ".jpg" Dim FileSize As UInt32 Dim ImageStream As System.IO.MemoryStream ImageStream = New System.IO.MemoryStream

Storing images in Core Data or as file?

阅读更多关于 Storing images in Core Data or as file?

问题 I have set of data which contains images also. I want to cache this data. Should i store them on file system or on core data and why? 回答1: There are two main options: Store the file on disk, and then store the path to the image in core data Store the binary data of the image in core data I personally prefer the 1st option, since it allows me to choose when I want to load the actual image in memory. It also means that I don't have to remember what format the raw data is in; I can just use the

What is it exactly a BLOB in a DBMS context

阅读更多关于 What is it exactly a BLOB in a DBMS context

问题 What is it a BLOB? How can I use it? What are the differences between DBMS\'s BLOBs. I would like to save data using BLOBs into any DBMS and then read that BLOB with a library. 回答1: BLOB : BLOB ( Binary Large Object ) is a large object data type in the database system. BLOB could store a large chunk of data, document types and even media files like audio or video files. BLOB fields allocate space only whenever the content in the field is utilized. BLOB allocates spaces in Giga Bytes. USAGE OF

Blob download is not working in IE

阅读更多关于 Blob download is not working in IE

问题 I have this in my Angular.js controller that downloads a CSV file: var blob = new Blob([csvContent.join(\'\')], { type: \'text/csv;charset=utf-8\'}); var link = document.createElementNS(\'http://www.w3.org/1999/xhtml\', \'a\'); link.href = URL.createObjectURL(blob); link.download = \'teams.csv\'; link.click(); This works perfectly in Chrome but not in IE. A browser console log says: HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will

How to display an BLOB image stored in MySql database?

阅读更多关于 How to display an BLOB image stored in MySql database?

问题 I am trying to display the last 5 images uploaded to my \"store\" table in MySql. I\'m a complete noob to PHP and databases and i\'ve been reading a lot on how to do this but no luck. I can store and display pictures one at a time but i\'d like to be able to have a gallery of sorts to show the last 5 uploaded. any advice or help would be greatly appreciated thanks! p.s. I know it frowned upon to store pictures to a database like this but this project is just for practice. index.php <!DOCTYPE

Serve image stored in SQLAlchemy LargeBinary column

阅读更多关于 Serve image stored in SQLAlchemy LargeBinary column

问题 I want to upload a file and store it in the database. I created a LargeBinary column. logo = db.Column(db.LargeBinary) I read the uploaded file and store it in the database. files = request.files.getlist(\'file\') if files: event.logo = files[0].file.read() Is this the proper way to store an image as binary in the database? How do I convert the binary data into an image again to display it? 回答1: If you absolutely need to store the image in the database, then yes, this is correct. Typically,

php:Store image into Mysql blob, Good or bad?

阅读更多关于 php:Store image into Mysql blob, Good or bad?

问题 this question is confusing me so i thought i should listen to an expert voice !. is it better to upload images to a folder and just save link to mysql, or better upload img itself into a blob mysql field ? thank you very much 回答1: I have often built systems to store images in the database, there are pros and cons to doing this. Pros: All your data is kept in one place, if you migrate your website/database the images will just be there Its easier to sort/delete/etc... Since you have to serve

Saving images: files or blobs?

阅读更多关于 Saving images: files or blobs?

问题 When you save your images (supose you have lots of them) do you store then as blobs in your Database, or as files? Why? Duplicate of: Storing Images in DB - Yea or Nay? 回答1: I usually go with storing them as files, and store the path in the database. To me, it's a much easier and more natural approach than pushing them into the database as blobs. One argument for storing them in the database: much easier to do full backups, but that depends on your needs. If you need to be able to easily take