runtime

SSIS-以变量的Sql当作RunTime的实际Sql 会用到这样的方法，可能性很多，例如你用是非微软牌的sql server，你用的是oracle,sybase数据库，且前提是有for ole db provider的才行 不然的话，你还是得要用datareader来源的方式，但这个冏状只会在ssis2005版发生，ssis2008可以使用ado.net来源的方式解决 但这不是我今天要介绍的重点，我今天要举的例子是 假设你的sql语法，是要用组sql的方式动态查询，亦或是你的查询字段不变，但因子查询会要用到where条件，且这个where条件又要动态给入的话，就比较适合用这种方法 虽然会麻烦些，但是可以解决问题的方法之一，可以参考看看 案例说明:假设我是用oracle，但ssis的ole db不支持 where的变量参数，因此我要再前面一开始就先组好sql给一个变量，然后把这个变量当作我下查询命令 首先拉一个”命令码工作” 然后设一个变量 sqlstr:这个变量是用来放组sql后的字符串 另外在”值”的地方，请先输入一段你自己想要查询的sql 语法 ex: SELECT top 1 订单号码, 客户编号, 员工编号, YEAR(订单日期) as 订单日期 FROM 订货主档 WHERE (YEAR(订单日期) = 1996) 这个就是到时候真正执行的查询语法

随着Microsoft拥抱开源的口号，.NET Framework也正式登上了其他平台，其中包含了Linux与OSX，与以往的3rd Party Mono不同，新的.NET Core具备官方的支持及完整的Roadmap。 为了登上其他舞台，.NET Core可以说从根源开始重新打造，在早期版本中Linux、OSX上仍是使用Mono Runtime，随着时间的推移，现在的1.1 RTM中Mono的身影已经完全消失了，取而代之的是Native Platform Runtime，这代表着.NET平台新时代的来临，也意味着Microsoft正走在一个Java曾走过的道路，Cross Platform、Write once，Run Anywhere。 第一个程序 在开始写程序前，你得先安装.NET Core，这不难，照着网页上写的步骤做就可以了。 https://www.microsoft.com/net/core#windowsvs2015 本文使用Visual Studio 2015做为开发工具，当然，你也可以使用跨平台、更简便的Visual Studio Code，同样可以达到目的。 准备好开发工具后，就可以透过Visual Studio 2015来建立第一个.NET Core应用程序，这里使用Console Application，因为命令行式的应用程序可以让我们以最快速

After doing some code refactoring, my VS2010 VB.Net Web Application project has stopped compiling with the following error: "Mixed mode assembly is built against version 'v1.1.4322' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information." In the 'File' column of the Visual Studio's error list is the word 'SGEN', but when I double-click, the file does not exist ("The document cannot be opened. It has been renamed, deleted or moved.") I gather it has something to do with serialization, but what is the required additional configuration information? I

I am wondering if type can be determined as runtime information in C++. (1) Although my question is quite general, for simplicity, I will start from a simple example: #include <stdio.h> #include <iostream> #include <cstring> using namespace std; int main(int argc, char * argv[]) { if (strcmp(argv[1], "int")==0) { int t = 2; }else if (strcmp(argv[1], "float")==0) { float t = 2.2; } cout << t << endl; // error: ‘t’ was not declared in this scope return 0; } For this example, there are two questions: (a) "argv[1] to t" is wrong, but can the type info in the C string argv[1] be converted to the

Is there a way at runtime to switch out an applications app.config (current.config to new.config, file for file). I have a backup/restore process which needs to replace its own application.exe.config file. I have seen this post but it does not answer how to do this at runtime. Turns out I can swap the .config file for the new one and do a ConfigurationManager.RefreshSection(...) for each section. It will update from the new .config file. Microsoft .NET's app.config is not designed for your scenario, as well as many others. I often encounter a similar need, so I have spent a lot of effort

I selected ServiceStack OrmLite for my project which is a pure Data-Oriented application. I am willing to allow the end user to create his own Object Types defined in an XML format that will be used to generate classes at runtime using CodeDOM . I will be also defining some "system" objects required by the application (i.e. User ) but I cannot foresee all the properties the end user will use and therefore I am looking for a way to allow extending the classes I create in design time. Sample bellow public class User { public Guid Uid { get; set; } public String Username { get; set; } public

Accessing a member on Form may cause a runtime exception because it is a field of a marshal-by-reference class I know what this warning is and know how to solve it. My question is why could this cause a runtime error? You are probably talking about warning CS1690, repro code: public class Remotable : MarshalByRefObject { public int field; } public class Test { public static void Run() { var obj = new Remotable(); // Warning CS1690: Console.WriteLine(obj.field.ToString()); } } In a remoting scenario, the Test.Run method will work with a proxy of the Remotable object. Building a proxy for a

Does using virtual inheritance in C++ have a runtime penalty in compiled code, when we call a regular function member from its base class? Sample code: class A { public: void foo(void) {} }; class B : virtual public A {}; class C : virtual public A {}; class D : public B, public C {}; // ... D bar; bar.foo (); There may be, yes, if you call the member function via a pointer or reference and the compiler can't determine with absolute certainty what type of object that pointer or reference points or refers to. For example, consider: void f(B* p) { p->foo(); } void g() { D bar; f(&bar); }

I'm trying to run a python script during the execution of my java code, because it will depend on the output received from the python script. So far I've tried using jythonc, unfortunately to no success, and now im trying to use the java Runtime and java Process to execute the python script. Now I've run into a problem when trying to call the python script. I feel as though it doesn't even call the script because it takes less than a couple seconds to get to the next page.... Could the problem be how I am calling the python script?? I am trying to run this through a web application... Here is