parent-child

Windows Forms: Unable to Click to Focus a MaskedTextBox in a Non TopLevel Form

余生颓废 提交于 2019-11-27 15:51:38
Like the title says, I've got a Child form being shown with it's TopLevel property set to False and I am unable to click a MaskedTextBox control that it contains (in order to bring focus to it). I can bring focus to it by using TAB on the keyboard though. The child form contains other regular TextBox controls and these I can click to focus with no problems, although they also exhibit some odd behavior: for example if I've got a value in the Textbox and I try to drag-click from the end of the string to the beginning, nothing happens. In fact I can't use my mouse to move the cursor inside the

Insert record in child table when parent record already exists using Entity Framework code first

China☆狼群 提交于 2019-11-27 15:13:20
问题 I have some Parent records already inserted in the database. Now i want to add some child records. To do this I followed following steps: Retrieve the Parent(A) records Create a new child(B) record Add parent record to the Navigation property of Child. B.A = A Call SaveChanges. The problem is when i do this EF inserts a New Parent and then add the child with a foreign key pointing to new newly inserted parent instead of inserting just the child with mapping to already existing parent. I also

How to specify the parent query field from within a subquery in mySQL?

被刻印的时光 ゝ 提交于 2019-11-27 13:25:02
Is there a way to specify the parent query field from within a subquery in mySQL? For Example: I have written a basic Bulletin Board type program in PHP. In the database each post contains: id(PK) and parent_id(the id of the parent post). If the post is itself a parent, then its parent_id is set to 0. I am trying to write a mySQL query that will find every parent post and the number of children that the parent has. $query = "SELECT id, ( SELECT COUNT(1) FROM post_table WHERE parent_id = id ) as num_children FROM post_table WHERE parent_id = 0"; The tricky part is that the first id doesn't know

recursive self query

懵懂的女人 提交于 2019-11-27 12:56:18
I have the following table: myTable: +----+----------+ | id | parentID | +----+----------+ | 1 | null | | 2 | 1 | | 3 | 1 | | 4 | 2 | | 5 | 4 | ----------------- i would like to get all rows tracing back until there's no parentID anymore. So ".... WHERE id=5" would give me: 5, 4, 2, 1 You are organizing your hierarchical data using the adjacency list model . The fact that such recursive operations are difficult is in fact one major drawback of this model. Some DBMSes, such as SQL Server 2005, Postgres 8.4 and Oracle 11g, support recursive queries using common table expressions with the WITH

Self referencing / parent-child relationship in Entity Framework

给你一囗甜甜゛ 提交于 2019-11-27 11:44:25
问题 I read quite a number of posts of programmers that run into the Unable to determine a valid ordering for dependent operations. Dependencies may exist due to foreign key constraints, model requirements, or store-generated values -exception when using a self-referencing relationship in Entity Framework. I am trying to get a parent-child relationship to work: public class Category { public int CategoryId { get; set; } public string Name { get; set; } public int ParentId { get; set; } public

Maven: Non-resolvable parent POM

烂漫一生 提交于 2019-11-27 11:37:43
I have my maven project setup as 1 shell projects and 4 children modules. When I try to build the shell. I get: [INFO] Scanning for projects... [ERROR] The build could not read 1 project -> [Help 1] [ERROR] [ERROR] The project module1:1.0_A0 (C:\module1\pom.xml) has 1 error [ERROR] Non-resolvable parent POM: Failure to find shell:pom:1.0_A0 in http://nyhub1.ny.ssmb.com:8081/nexus/content/repositories/JBoss/ was cached in the local repository, resolution will not be reattempted until the update interval of jboss has elapsed or updates are forced and 'parent.relativePath' points at wrong local

node.js child process - difference between spawn & fork

一曲冷凌霜 提交于 2019-11-27 10:09:06
This might seem like a basic question, but I could not find any documentation : What is the difference between forking & spawning a node.js process? I have read that forking is a special case of spawning, but what are the different use cases / repecussions for using each of them? ChrisCM Spawn is a command designed to run system commands. When you run spawn, you send it a system command that will be run on its own process, but does not execute any further code within your node process. You can add listeners for the process you have spawned, to allow your code interact with the spawned process,

nhibernate - Create child by updating parent, or create explicitly?

江枫思渺然 提交于 2019-11-27 07:37:28
问题 What is the preferred method for creating children objects? Adding the child to a collection on it's parent and calling update on the parent, or Creating the child explicitly, add the child to a collection on the parent, and updating the parent? I'm struggling with #1. And it's hard enough that I'm thinking #2 is preferable (less "magic"). 回答1: Not sure what would be the "preferred method" (it could depend on who does prefer) . But I can share my way If the parent is a root entity, then we

Cross browser method to fit a child div to its parent's width

风流意气都作罢 提交于 2019-11-27 05:16:15
问题 I'm looking for a solution to fit a child div into it's parent's width . Most solutions I've seen here are not cross-browser compatible (eg. display: table-cell; isn't supported in IE <=8 ). 回答1: The solution is to simply not declare width: 100% . The default is width: auto , which for block-level elements (such as div ), will take the "full space" available anyway (different to how width: 100% does it). See: http://jsfiddle.net/U7PhY/2/ Just in case it's not already clear from my answer:

Start new process, without being a child of the spawning process

醉酒当歌 提交于 2019-11-27 04:29:24
问题 How would I go about starting a new process without it being the child of the calling process. Example: Main Program (Caller.exe) process.start("file.exe") Image: 回答1: If the spawning process (parent) ends before the spawned process (child) does, then the parent-child chain is broken. To make use of this, you'd have to use an intermediate stub-process like so: Caller.exe → Stub.exe → File.exe. Here Stub.exe is simple launcher program that ends just after starting File.exe. 回答2: If you start a