我有以下列表:
EMP_ID | UPDATED_DATE | MARK ------ | ------------ | ---- 111 | 01/01/2015 | 99 111 | 01/01/2013 | 85 111 | 01/01/2017 | 80 222 | 01/01/2011 | 70 222 | 01/01/2015 | 55 222 | 01/01/2002 | 60
我必须为每个ID选择一行,最新的UPDATED_DATE,在我们的等:
EMP_ID | UPDATED_DATE | MARK ------ | ------------ | ---- 111 | 01/01/2017 | 80 222 | 01/01/2015 | 55
这是订单的代码:
empMarksList.OrderBy(x=>x.EMP_ID).ThenBy(y=>y.UPDATED_DATE)
我运行测试连接,我希望看到清晰的会话浏览器,但在程序结束时,我在会话浏览器中看到超过6个会话
这是代码:
private void testConnection()
{
string connectionString = "data source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=1111)(PORT=1699))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = abcd)));Min Pool Size=10; Connection Lifetime=120;";
OracleConnection oraConn = new OracleConnection(connectionString);
try
{
oraConn.Open();
}
catch (Exception e)
{
}
finally
{
oraConn.Dispose();
oraConn.Close();
}
}
请帮帮我!
当我从浏览器发出请求时，我的请求是有效的，但通过 Angular 9 应用程序我收到 401 错误。这是来自 chrome 的标题：
Request URL: http://localhost:1234/api/Common/GetMy_List
Request Method: GET
Status Code: 401
Referrer Policy: strict-origin-when-cross-origin
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, X-Token
Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS
Access-Control-Allow-Origin: http://localhost:4200
Access-Control-Allow-Origin: *
Cache-Control: private
Content-Length: 6069
Content-Type: text/html; charset=utf-8
Date: Wed, 06 Oct 2021 12:55:39 GMT
Server: Microsoft-IIS/10.0
WWW-Authenticate: Negotiate
WWW-Authenticate: NTLM
X-Powered-By: ASP.NET
Accept: application/json, text/plain, */*
Accept-Encoding: gzip, deflate, br
Accept-Language: he-IL,he;q=0.9,en-US;q=0.8,en;q=0.7
Connection: keep-alive
Host: localhost:1234
Origin: http://localhost:4200
Referer: http://localhost:4200/
sec-ch-ua: "Chromium";v="94", …我有来自 UploadedFile 按钮的文件，我想使用幻数打印扩展文件，
我的代码：
UploadedFile file = (UploadedFile)valueChangeEvent.getNewValue();
byte[] fileByteArray = IOUtils.toByteArray(file.getInputStream());
注意：Mime 类型和内容文件（来自文件和来自文件名）与幻数不同（幻数来自输入流的第一个字节）
我该怎么做？