hi I have the following question ...please do help as I am very new to programming in C# with no previous programming experience... In my code I am suppose to Iterate through XElement in a Xml file add that Xelement to a parent known as Capability....This is my code... if (xElem.HasElements) { foreach (XElement xChild in xElem.Element("Elements")) {
嗨，我有以下问题...请帮忙，因为我很新的编程在C＃没有以前的编程经验... 在我的代码中，我假设在Xml文件中通过XElement迭代，将Xelement添加到名为Capability的父级....这是我的代码... if (xElem.HasElements) { foreach (XElement xChild in xElem.Element("Elements")) { Capability capChild = Parse(xChild); capParent.Children.Add(capChild);
Background: I've got a bunch of strings that I'm getting from a database, and I want to return them. Traditionally, it would be something like this: public List<string> GetStuff(string connectionString) { List<string> categoryList = new List<string>(); using (SqlConnection sqlConnection = new SqlConnection(connectionString)) { string commandText = "
背景：我从数据库中得到了一堆字符串，并且我想返回它们。 传统上，它会是这样的： public List<string> GetStuff(string connectionString) { List<string> categoryList = new List<string>(); using (SqlConnection sqlConnection = new SqlConnection(connectionString)) { string commandText = "GetStuff"; using (SqlCommand sqlCommand = new SqlCommand(commandText, s
So I have an extension method defined like so public static String FormatString(this String source, String formatString, Object[] parameters) { return String.Format(formatString, parameters); } and from investigation, I have come to learn that when the above method is invoked, it expects 3 parameters and not two even though in code I would invoke it on a String instance lik
所以我有一个像这样定义的扩展方法 public static String FormatString(this String source, String formatString, Object[] parameters) { return String.Format(formatString, parameters); } 从调查，我已经了解到，当上述方法被调用时，它需要3个参数，而不是两个，即使在代码中，我会在像这样的String实例上调用它 String StringInstance = "MYSTRINGINSTANCE"; String StringFormatExpression = "i
updated: read below in this post for a minimal solution I have some newbie questions about an MVC4 solution with plugins. I googled around a bit and found some good stuff, but it does not exactly fit my requirements, so I'm asking here for some advice. It seems that the best solution for widget-like plugins in MVC is portable areas (in the MvcContrib package). I found the basic guidance
更新：在这篇文章中阅读下面的最小解决方案 我有一些关于带插件的MVC4解决方案的新手问题。 我搜索了一下，发现了一些好东西，但它不完全符合我的要求，所以我在这里问一些建议。 似乎MVC中类似插件的插件的最佳解决方案是可移植区域（在MvcContrib包中）。 我在这里找到了基本的指导： http://lostechies.com/erichexter/2009/11/01/asp-net-mvc-portable-areas-via-mvccontrib/ 以及一些有用的提示： http://geeks
This one is a little difficult to explain so I'll show code first.. Note: Made example less confusing public class Class1 { public string Title {get;set;} public string Name {get;set;} public Class1(Class1 class1) { // ?? How do I populate current class with new class values? // ?? this = class1; - Does not work // I want to avoid having t
这个有点难以解释，所以我会先显示代码。 注意：让示例更少混淆 public class Class1 { public string Title {get;set;} public string Name {get;set;} public Class1(Class1 class1) { // ?? How do I populate current class with new class values? // ?? this = class1; - Does not work // I want to avoid having to manually set each value } } 感谢您的
The program crashes at var subdomain = new Dictionary The message that Visual Studio says is "Argument exception was unhandled" I'm not sure how to fix it or what it means? Any help would be appreciated. using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Win32; namespace LotusTrustedSites { class ReportDownloade
该程序崩溃 var subdomain =新词典 Visual Studio所说的消息是“参数异常未处理” 我不知道如何解决它或它的意思？ 任何帮助，将不胜感激。 using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Win32; namespace LotusTrustedSites { class ReportDownloader { [STAThread] static void Main(string[] args)
Working through a tutorial (Professional ASP.NET MVC - Nerd Dinner), I came across this snippet of code: public IEnumerable<RuleViolation> GetRuleViolations() { if (String.IsNullOrEmpty(Title)) yield return new RuleViolation("Title required", "Title"); if (String.IsNullOrEmpty(Description)) yield return new RuleViolation("Description required","Description"); if
通过教程（专业ASP.NET MVC - 书呆子晚餐），我遇到了这段代码： public IEnumerable<RuleViolation> GetRuleViolations() { if (String.IsNullOrEmpty(Title)) yield return new RuleViolation("Title required", "Title"); if (String.IsNullOrEmpty(Description)) yield return new RuleViolation("Description required","Description"); if (String.IsNullOrEmpty(HostedBy)) y
Possible Duplicate: yield statement implementation I've seen msdn docs and it says: The yield keyword signals to the compiler that the method in which it appears is an iterator block. The compiler generates a class to implement the behavior that is expressed in the iterator block. In the iterator block, the yield keyword is used together with the return keyword to provide a value to t
可能重复： yield语句实现 我见过msdn文档，它说： yield关键字发信号给编译器，它出现的方法是一个迭代器块。 编译器生成一个类来实现在迭代器块中表达的行为。 在迭代器块中，yield关键字与return关键字一起用于为枚举器对象提供值。 所以它意味着yield关键字是一个语法糖，并且编译器执行繁重的Iterator生成工作。 （我对么 ？） 那么这个语法糖的生成实现代码是什么。 生成的代码依赖于原始代码，但通常情况
I am trying to build a pie chart from a dictionary. Before I display the pie chart, I want to tidy up the data. I'm removing any pie slices that would be less than 5% of the pie and putting them in a "Other" pie slice. However I'm getting a Collection was modified; enumeration operation may not execute Collection was modified; enumeration operation may not execute exception
我正在尝试从字典中构建饼图。 在展示饼图之前，我想整理一下数据。 我将删除所有饼图片的比例不到5％，然后放入“其他”饼图片。 但是我收到一个Collection was modified; enumeration operation may not execute Collection was modified; enumeration operation may not execute在运行时Collection was modified; enumeration operation may not execute异常。 我明白为什么在迭代它们时不能添加或删除字典中的项目。 不
This question already has an answer here: How to Casting DataSource to List<T>? 4 answers If you do not know the exact type of object, but you know for sure that whatever it is, it will have GetEnumerator on it (say, because it's a collection or one of your own objects that implements IEnumerable ) you can stop the compiler from issuing an error by casting to dynamic , like this:
这个问题在这里已经有了答案： 如何将数据源投射到列表<T>？ 4个答案 如果你不知道对象的确切类型，但是你确定无论它是什么，它都会有GetEnumerator （比如说，因为它是一个集合或者你自己的一个实现了IEnumerable的对象），你可以停止编译器通过转换为dynamic来发布错误，如下所示： foreach (var item in (dynamic)(ddlOther.DataSource)) { ... } 这里的交易是，如果事实证明ddlOther.DataSource没有GetEnum