c#-3.0

问题 I've read a file into StringBuilder. When I give a string as an input, if the word is present in the file, the output should be true.. If its not present, it should be false.. How do i do it? Could someone help me with the code? I've written the program till here.. How do i go further? Thanks alot.. :) class Program { static void Main(string[] args) { using (StreamReader Reader = new StreamReader("C://myfile2.txt")) { StringBuilder Sb = new StringBuilder(); Sb.Append(Reader.ReadToEnd()); {

问题 <?xml version="1.0" encoding="ISO-8859-1"?> <bookstore> <book category="COOKING"> <title lang="en">Everyday Italian</title> <author>Giada De Laurentiis</author> <year>2005</year> <price>30.00</price> </book> <book category="CHILDREN"> <title lang="en">Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="WEB"> <title lang="en">XQuery Kick Start</title> <author>James McGovern</author> <author>Per Bothner</author> <author>Kurt Cagle<

问题 <?xml version="1.0" encoding="ISO-8859-1"?> <bookstore> <book category="COOKING"> <title lang="en">Everyday Italian</title> <author>Giada De Laurentiis</author> <year>2005</year> <price>30.00</price> </book> <book category="CHILDREN"> <title lang="en">Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="WEB"> <title lang="en">XQuery Kick Start</title> <author>James McGovern</author> <author>Per Bothner</author> <author>Kurt Cagle<

问题 public void CreateFileOutput(object parameter) { TransactFileCreation(); WPFMessageBox.Show("test", "Process completed successfully."); } public void TransactFileCreation() { if (BatchFolderPath == null) { WPFMessageBox.Show("test", "Select a Batch folder"); return; } // code.. } I am calling TransactFileCreation() from CreateFileOutput(). Once Msg Box displayed, further the function should not work. But in my case, it again go to the main function and displaying msg box present in that. How

问题 public void CreateFileOutput(object parameter) { TransactFileCreation(); WPFMessageBox.Show("test", "Process completed successfully."); } public void TransactFileCreation() { if (BatchFolderPath == null) { WPFMessageBox.Show("test", "Select a Batch folder"); return; } // code.. } I am calling TransactFileCreation() from CreateFileOutput(). Once Msg Box displayed, further the function should not work. But in my case, it again go to the main function and displaying msg box present in that. How

问题 I want to draw a rectangle on a form in C#. I read and found this article. Are there any samples or tutorials available ? The article was not very helpful. 回答1: The article you linked appears to be C++, which may explain why it didn't help you much. If you create events for MouseDown and MouseUp, you should have the two corner points you need for a rectangle. From there, it's a matter of drawing on the form. System.Drawing.* should probably be your first stop. There are a couple of tutorials

问题 I have a string as follows: string str = "ssmmmjjkkkkrrr" Using C#, I need to display the count of each individual character as follows: s = 2 m = 3 j = 2 k = 4 r = 3 Thanks in advance. 回答1: The simplest way would be to use LINQ: var counted = text.GroupBy(c => c) .Select(g => new { g.Key, Count = g.Count() }); foreach (var result in counted) { Console.WriteLine("{0} = {1}", result.Key, result.Count); } Or even more briefly: foreach (var group in text.GroupBy(c => c)) { Console.WriteLine("{0}

问题 I have a string as follows: string str = "ssmmmjjkkkkrrr" Using C#, I need to display the count of each individual character as follows: s = 2 m = 3 j = 2 k = 4 r = 3 Thanks in advance. 回答1: The simplest way would be to use LINQ: var counted = text.GroupBy(c => c) .Select(g => new { g.Key, Count = g.Count() }); foreach (var result in counted) { Console.WriteLine("{0} = {1}", result.Key, result.Count); } Or even more briefly: foreach (var group in text.GroupBy(c => c)) { Console.WriteLine("{0}

问题 I would like to store some data from TreeNode.FullPath and then later i would like to re-expand everything up to that point. Is there a simple way of doing it? Thanks a lot! 回答1: I had a similar problem (but I just wanted to find the treenode again) and found this: http://c-sharpe.blogspot.com/2010/01/get-treenode-from-full-path.html i know it only answers part of your problem, but better than no replies at all ;) 回答2: You can write it as an extension method to the TreeNodeCollection : using

问题 I have over a thousand folders, each folder contains one or more files with the following names: Unordered: Alison.ext Heather.ext Molly.ext Paula.ext Sam.ext Ordered: Molly.ext Sam.ext Heather.ext Alison.ext Paula.ext I would like to write an expression to sort this list as described above. 回答1: //Creating a dictionary with the custom order var order = "MSHAP"; var orderDict = order.Select((c,i)=>new {Letter=c, Order=i}) .ToDictionary(o => o.Letter, o => o.Order); var list = new List<string>