本文介绍了泛型< T>在C＃中不工作，即使没有任何错误运行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我创建使用Silverlight 5（VS 2010）C＃Web应用程序。首先，我创建了在每一件事情是工作的罚款控制台应用程序。但是，当我做它在Web应用程序中出现的麻烦。I am creating a C# web application using Silverlight 5 (VS 2010). First I created console application in that every thing is working fine. But trouble occurs when I do it in web application.即使是在Web应用程序，它正在罚款特别设置的数据类型（例如说为 INT 而不是< T> 它工作正常），但是当我使用通用则不起作用。 它编译无错，但它甚至没有调试被设置为切换断点的区域。最初，GUI是这样的：Even in web application it is working fine for particularly set data type (say for example for int instead of <T> it is working fine) but when I use generic then it doesn't work. It compiles error free but it doesn't even debug the area which is set to "toggle break point". Initially the GUI was like this:但是作为控制传递给容易出错的部分中，GUI突然消失这样But as the control passes to the error prone part, the GUI suddenly disappears like this和在哪里存放的地方在破发点被该替换And the place where I kept the break points is replaced by this（见最左边）作为一个结果，我不能够调试找到问题 一些解释什么，我试图做的：在给定的代码下面我有一个二进制文件，并存储在fileContents，这是数据类型的内部字节[] （我不透露给你的方法来读取该文件，现在你可以认为fileContents包含的MainPage内的二进制文件的内容类）。其实我会储存（在二进制文件格式0和1）的符号，会发现它的频率（通过计算它的文件中重复的时间数字，但有没有问题，所以我不写它的方法）。但在我这个代码 processingValue 变量将是通用型的（< T> ），我将在存储符号（这是<也; T> 键入（这个符号从二进制文件中读取可能是其中之一短 / INT / 长 / UInt32的 / UINT64 等），我不会在我的代码显示）。Some explanation what I am trying to do: in the given code below I have a binary file and stored inside the "fileContents" which is of data type byte[] (I am not disclosing to you the method to read that file, for now you can consider that fileContents contains the contents of a binary file inside the MainPage class). Actually I will store the symbols (of the form 0 and 1 in binary file) and will find its frequency (by counting number of time it repeats in the file, but that has no problem so I am not writing the method for it). But this processingValue variable in my code will be of generic type(<T>) which I will store in "symbol" (which is also of <T> type (this symbol read from binary file could be one of these short/int/long/UInt32/UInt64 etc.) which I am not showing in my code).我有这样一个场景：using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using System.IO;using System.Text;using System.Runtime.InteropServices;using System.Diagnostics;namespace{ public partial class MainPage: UserControl { byte[] fileContent; public MainPage() { InitializeComponent(); fileContent = null; //Suppose it already contains binary fileContents }//I press the button in order to call the Huffman class because it's Object declared in it public void ButtonClickEvent(object sender, RoutedEventArgs e) { MessageBox.Show("check0"); //Suppose i had stored contents of a file inside "fileContent" , so fileContent below contains //contents of a binary file //**THE LINE BELOW IS ERROR PRONE** Huffman < uint > obj1 = new Huffman < uint > (this, fileContent, BitConverter.ToUInt32); //This Object creation creates problem, whereas if i remove generic type (<T>), Then it works fine. //If i don't use genrics then i do it like this : Huffman obj1 = new Huffman(this, fileContent); (Whereas <T> in Huffman class is replaced by "int" and it works fine) MessageBox.Show("check1"); //This check box is never executed } } public class Huffman < T > where T: struct,IComparable < T > ,IEquatable < T > { public Huffman(MainPage Object, byte[] fileContent, Func < byte[], int, T > converter) { MessageBox.Show("check2"); //It never executes length = fileContent.Length; size = Marshal.SizeOf(typeof (T)); byte[] data; for (long position = 0; position + size < length; position += size) { data = fileContent; //This data conatains the filecontents now T processingValue = converter(data, 0); { //I do something here with processingValue it could be int16/int32/int64/uin32/uint64 etc. } } } }}有任何问题 BitConverter 函数创建对象在MainPage类？Is there any problem in BitConverter function in Object Creation in MainPage class?我甚至无法调试霍夫曼类，我将在开始破发点和霍夫曼的结束点。上的Internet Explorer类，但控制不来的内部和按钮（使用XAML GUI创建）消失I am even not able to debug the Huffman class, I set the break points at starting and ending points of Huffman class but the control don't come inside and the buttons (created using XAML GUI) on the Internet Explorer disappears.下面是我的全码：（请关注我正在读一个二进制文件（canbe采取测试我的代码扩展名的文件名为.o（FileName.o），我读得好））：Here is my full code : (please pay attention i am reading a Binary file (any file with extension ".o"(FileName.o) canbe taken for testing my code, i read well)):using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using System.IO;using System.Text;using System.Runtime.InteropServices;using System.Diagnostics;namespace FinalSS{ public partial class MainPage : UserControl { public const int CHUNK_SIZE = 4096; public const string UPLOAD_URI = "http://localhost:50323/FileUpload.ashx?filename={0}&append={1}"; public const string UPLOAD_DIALOG_FILTER = "All files (*.*)|*.*|Jpeg Images (*.jpg)|*.png|PNG Images (*.png)|*.png"; private Stream data; private string fileName; private long TotalBytes; private long UploadedBytes; byte[] fileContent; public event Action simpleEvent; public MainPage() { InitializeComponent(); progressBar.Visibility = Visibility.Collapsed; textBox.Visibility = Visibility.Collapsed; // fileContent = null; UploadedBytes = 0; TotalBytes = 0; } /* public void comboInvoke() { comboBox1.Items.Add("byte"); comboBox1.Items.Add("sbyte"); comboBox1.Items.Add("short"); comboBox1.Items.Add("int"); comboBox1.Items.Add("long"); } */ public void BrowseButtonClick(object sender, RoutedEventArgs e) { OpenFileDialog dlg = new OpenFileDialog(); dlg.Multiselect = false; dlg.Filter = UPLOAD_DIALOG_FILTER; bool? retVal = dlg.ShowDialog(); if (retVal != null && retVal == true) { progressBar.Visibility = Visibility.Visible; textBox.Visibility = Visibility.Visible; textBox.Text = "Uploading the file..."; data = dlg.File.OpenRead(); TotalBytes = data.Length; UploadedBytes = 0; fileName = dlg.File.Name; progressBar.Maximum = TotalBytes; UploadFileChunk(); } } private void UploadFileChunk() { textBox.Text = "Upload in progress..."; string uploadUri = ""; if (UploadedBytes == 0) { uploadUri = String.Format(UPLOAD_URI, fileName, 0); // Dont't append } else if (UploadedBytes < TotalBytes) { uploadUri = String.Format(UPLOAD_URI, fileName, 1); // append } else { return; // Upload finished } fileContent = new byte[CHUNK_SIZE]; int bytesRead = data.Read(fileContent, 0, CHUNK_SIZE); data.Flush(); WebClient wc = new WebClient(); wc.OpenWriteCompleted += new OpenWriteCompletedEventHandler(wc_OpenWriteCompleted); Uri u = new Uri(uploadUri); wc.OpenWriteAsync(u, null, new object[] { fileContent, bytesRead }); UploadedBytes += fileContent.Length; MessageBox.Show("check0"); Huffman<uint> obj1 = new Huffman<uint>(this, fileContent, BitConverter.ToUInt32); MessageBox.Show("check1"); } void wc_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e) { progressBar.Value = UploadedBytes; if (e.Error == null) { object[] objArr = e.UserState as object[]; byte[] fileContent = objArr[0] as byte[]; int bytesRead = Convert.ToInt32(objArr[1]); Stream outputStream = e.Result; outputStream.Write(fileContent, 0, bytesRead); outputStream.Close(); if (UploadedBytes < TotalBytes) { UploadFileChunk(); } else { textBox.Text = fileName; } } } /// <summary> /// /////////////////////////////////////////////////////// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ShowButtonClick(object sender, RoutedEventArgs e) { if (simpleEvent != null) simpleEvent(); } private void CompressButtonClick(object sender, RoutedEventArgs e) { } private void CloseButtonClick(object sender, RoutedEventArgs e) { } private void comboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e) { } private void textBox_TextChanged(object sender, TextChangedEventArgs e) { } private void TreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e) { } private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e) { } private void UserControl_Loaded(object sender, RoutedEventArgs e) { } private void listBox2_SelectionChanged(object sender, SelectionChangedEventArgs e) { } private void TreeViewItem_Selected_1(object sender, RoutedEventArgs e) { } private void TreeViewItem_Selected(object sender, RoutedEventArgs e) { } } public class Huffman<T> where T : struct, IComparable<T>, IEquatable<T> { long length; int size; byte[] data; public class Node { public Node next, left, right; public T symbol; // This symbol is of generic type. public int freq; public int is_processed; } public Node front, rear; public Huffman(MainPage form, byte[] fileContent,Func < byte[], int, T > converter) { MessageBox.Show("check2"); // form.simpleEvent += () => ShowClick(form,fileContent); length = 0; front = null; rear = null; MessageBox.Show("check4"); length = fileContent.Length; size = Marshal.SizeOf(typeof(T)); Stream stream = new MemoryStream(fileContent); { for (long position = 0; position + size < length; position += size) { data = fileContent; T processingValue = converter(data, 0); { Node pt, temp; bool is_there = false; pt = front; while (pt != null) { form.listBox1.Visibility = Visibility.Visible; if (pt.symbol.Equals(processingValue)) { pt.freq++; is_there = true; break; } temp = pt; pt = pt.next; } if (is_there == false) { temp = new Node(); temp.symbol = processingValue; temp.freq = 1; temp.left = null; temp.right = null; temp.next = null; temp.is_processed = 0; if (front == null) { front = temp; } else { temp.next = front; front = temp; } } } } stream.Close(); } MessageBox.Show("Yes correctly done"); merge_sort(front); Print_tree(front, form); } public Node merge_sort(Node head) { if (head == null || head.next == null) { return head; } Node middle = getMiddle(head); Node sHalf = middle.next; middle.next = null; return merge(merge_sort(head), merge_sort(sHalf)); } public Node merge(Node a, Node b) { Node dummyHead, curr; dummyHead = new Node(); curr = dummyHead; while (a != null && b != null) { if (a.freq <= b.freq) { curr.next = a; a = a.next; } else { curr.next = b; b = b.next; } curr = curr.next; } curr.next = (a == null) ? b : a; return dummyHead.next; } public Node getMiddle(Node head) { if (head == null) { return head; } Node slow, fast; slow = fast = head; while (fast.next != null && fast.next.next != null) { slow = slow.next; fast = fast.next.next; } return slow; } /////// public void Print_tree(Node treee,MainPage obj) { Node pt = treee; while (pt != null) { obj.listBox1.Items.Add("Symbol :" + pt.symbol + " -" + " Frequency : " + pt.freq); // Debug.WriteLine("Symbol :" + pt.symbol + " -" + " Frequency : " + pt.freq); pt = pt.next; } } }}下面是XML代码：<UserControl x:Class="FinalSS.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk" d:DesignHeight="300" d:DesignWidth="400" Loaded="UserControl_Loaded"><Grid x:Name="LayoutRoot" Background="Wheat" Visibility="Visible" Height="348" Width="681"> <Grid.ColumnDefinitions> <ColumnDefinition Width="37*" /> <ColumnDefinition Width="86*" /> <ColumnDefinition Width="558*" /> </Grid.ColumnDefinitions> <sdk:TreeView SelectedItemChanged="TreeView_SelectedItemChanged" Margin="12,12,12,41" Background="wheat" Grid.ColumnSpan="3"> <sdk:TreeViewItem Header="File" Selected="TreeViewItem_Selected" > <sdk:TreeViewItem.Items> <sdk:TreeViewItem Selected="TreeViewItem_Selected_1"> <sdk:TreeViewItem.Header> <StackPanel Orientation="Horizontal" > <Button Content="Browse File" Width="76" Height="20" Click="BrowseButtonClick"></Button> </StackPanel> </sdk:TreeViewItem.Header> </sdk:TreeViewItem> <sdk:TreeViewItem Selected="TreeViewItem_Selected_1"> <sdk:TreeViewItem.Header> <StackPanel Orientation="Horizontal"> <Button Content="Show Data" Width="75" Height="20" Click="ShowButtonClick"></Button> </StackPanel> </sdk:TreeViewItem.Header> </sdk:TreeViewItem> <sdk:TreeViewItem Selected="TreeViewItem_Selected_1"> <sdk:TreeViewItem.Header> <StackPanel Orientation="Horizontal"> <Button Content="Compress" Width="75" Height="20" Click="CompressButtonClick"></Button> </StackPanel> </sdk:TreeViewItem.Header> </sdk:TreeViewItem> <sdk:TreeViewItem Selected="TreeViewItem_Selected_1"> <sdk:TreeViewItem.Header> <StackPanel Orientation="Horizontal"> <Button Content="close" Width="75" Height="20" Click="CloseButtonClick" ></Button> </StackPanel> </sdk:TreeViewItem.Header> </sdk:TreeViewItem> </sdk:TreeViewItem.Items> </sdk:TreeViewItem> </sdk:TreeView> <ProgressBar Name="progressBar" Height="9" HorizontalAlignment="Left" Margin="216,82,0,0" VerticalAlignment="Top" Width="139" Foreground="#FF3AB802" Grid.Column="2" Visibility="Collapsed" /> <TextBox Name="textBox" Height="23" HorizontalAlignment="Left" Margin="146,68,0,0" VerticalAlignment="Top" Width="66" Grid.Column="2" TextChanged="textBox_TextChanged" Visibility="Collapsed" /> <ListBox Height="148" HorizontalAlignment="Left" Margin="0,152,0,0" Name="listBox1" VerticalAlignment="Top" Width="197" ItemsSource="{Binding}" Visibility="Collapsed" Grid.Column="2" SelectionChanged="listBox1_SelectionChanged"></ListBox> <ListBox Height="148" HorizontalAlignment="Right" Margin="0,154,160,0" Name="listBox2" VerticalAlignment="Top" Width="203" SelectionChanged="listBox2_SelectionChanged" Visibility="Collapsed" Grid.Column="2"> <ListBoxItem /> <ListBoxItem /> </ListBox> <ComboBox Height="19" HorizontalAlignment="Left" Margin="13,204,0,0" Name="comboBox1" VerticalAlignment="Top" Width="104" SelectionChanged="comboBox1_SelectionChanged" Grid.ColumnSpan="2"> <ComboBoxItem /> <ComboBoxItem /> </ComboBox> </Grid></UserControl> 至于我的担保人而言这个问题是由于 BitConverter 在霍夫曼调用构造函数func转换器造成的问题。 我想我需要使用Func键转换其他方式As far as my surety is concerned this problem is due to BitConverter in huffman constructor invoke the function Func converter creates problem. I guess i need to use Func converter some other way推荐答案目前您的观点我不能看到你的code.In的Silverlight任何错误，你可以不使用断点像控制台或WinForm的应用程序进行调试。 你能不能把你的解决方案。然后，我可以检查出来。At your point I can't see any error of your code.In silverlight you can't debug like Console or WinForm Application using break points.Can you send your solution. Then I can check it out. 这篇关于泛型< T>在C＃中不工作，即使没有任何错误运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！
