guid

I want to create a varchar column in SQL that should contain N'guid' while guid is a generated GUID by .NET ( Guid.NewGuid ) - class System.Guid. What is the length of the varchar I should expect from a GUID? Is it a static length? Should I use nvarchar (will GUID ever use Unicode characters)? varchar(Guid.Length) PS. I don't want to use a SQL row guid data-type. I am just asking what is Guid.MaxLength . It depends on how you format the Guid: Guid.NewGuid().ToString() => 36 characters (Hyphenated) outputs: 12345678-1234-1234-1234-123456789abc Guid.NewGuid().ToString("D") => 36 characters

前段时间做视频上传业务，通过网页上传视频到服务器。 视频大小 小则几十M，大则 1G+，以一般的HTTP请求发送数据的方式的话，会遇到的问题：1，文件过大，超出服务端的请求大小限制；2，请求时间过长，请求超时；3，传输中断，必须重新上传导致前功尽弃； 解决方案： 1，修改服务端上传的限制配置；Nginx 以及 PHP 的上传文件限制 不宜过大，一般5M 左右为好； 2，大文件分片，一片一片的传到服务端，再由服务端合并。这么做的好处在于一旦上传失败只是损失一个分片而已，不用整个文件重传，而且每个分片的大小可以控制在4MB以内，服务端限制在4M即可。 前端 Web前端可使用HttpUploader6的大文件上传控件6；官网地址： http://t.cn/EyI6vHh <div class="section section6 section5"> <div class="part1"><a href="javascript:;" target="_blank" class="part1__btn">批量删除</a><span class="part1__txt"><em class="part1__num" id="upload_num">0</em>个视频，共 <em class="part1__num" id="upload_size">0M</em></span></div>

I need to communicate a Guid that was generated in .NET to a Java application. I use Guid.ToByteArray() to store it on disk as a byte[] , then read it into Java and convert it to a UUID. For this purpose I copied the implementation of the (private) constructor of UUID that takes a byte[] : private UUID(byte[] data) { long msb = 0; long lsb = 0; assert data.length == 16; for (int i=0; i<8; i++) msb = (msb << 8) | (data[i] & 0xff); for (int i=8; i<16; i++) lsb = (lsb << 8) | (data[i] & 0xff); this.mostSigBits = msb; this.leastSigBits = lsb; } However, when I inspect the UUID using toString() ,

When you call ToByteArray() on a GUID in .NET, the ordering of the bytes in the resulting array is not what you'd expect as compared to the string representation of the GUID. For example, for the following GUID represented as a string: 11223344-5566-7788-9900-aabbccddeeff The result of ToByteArray() is this: 44, 33, 22, 11, 66, 55, 88, 77, 99, 00, AA, BB, CC, DD, EE, FF Note that the order of the first four bytes is reversed. Also bytes 4 and 5 are swapped and bytes 6 and 7 are swapped. But the final 8 bytes are in the same order they're represented as in the string. I understand that this is

Does anyone know of a good, solid, implementation of C# like GUID (UUID) in TypeScript? Could do it myself but figured I'd spare my time if someone else done it before. Fenton There is an implementation in my TypeScript utilities based on JavaScript GUID generators. Here is the code: class Guid { static newGuid() { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8); return v.toString(16); }); } } // Example of a bunch of GUIDs for (var i = 0; i < 100; i++) { var id = Guid.newGuid(); console.log(id); }