namespace WcfService1
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
[ServiceContract]
public interface HelloWorldService
{
[OperationContract]
[WebGet(UriTemplate = "")]
public string HelloWorld() //here
{
return "Hello world!";
}
}
}
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我收到此错误:
Error 1 The modifier 'public' is not valid for this item
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这是我在svc.cs文件中的内容
public class Service1 : HelloWorldService
{
public string HelloWorld()
{
return string.Format("Hello World!");
}
}
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这实际上来自我的uni教程:
与上周我们首先为我们的服务创建接口的情况不同,我们只是在第一个示例中创建WCF服务对象.这是为了在教程中节省时间.最佳实践意味着我们应该为所有服务创建接口,这些接口与定义的服务合同相关.首先在Visual Studio 2008中创建一个新项目(记得添加System.ServiceModel和System.ServiceModel.Web引用,以及这两个名称空间的using声明),并添加以下类定义: …
任何人都可以帮我解决一些问题。我正在尝试创建一种自制的身份验证方法,有些地方卡住了,希望有人能提供帮助。我想问的第一件事是如何解决我在代码中注释的问题:
public string Authentication(string studentID, string password)
{
var result = students.FirstOrDefault(n => n.StudentID == studentID);
//find the StudentID that matches the string studentID
if (result != null)
//if result matches then do this
{
//----------------------------------------------------------------------------
byte[] passwordHash = Hash(password, result.Salt);
string HashedPassword = Convert.ToBase64String(passwordHash);
//----------------------------------------------------------------------------
// take the specific students salt and generate hash/salt for string password (same way student.Passowrd was created)
System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();
byte[] UserPassword = enc.GetBytes(HashedPassword);
UserPassword.SequenceEqual(result.Password); // byte[] does not contain a definition …Run Code Online (Sandbox Code Playgroud) 这是一个跟进问题:linq问题与我收到的答案有关.我不确定发生了什么,但我收到一个错误:
The underlying connection was closed: An unexpected error occurred on a receive.
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这就是异常发生的地方:
string uriGroup = "http://localhost:8000/Service/Group";
private void ListGroups_Click(object sender, RoutedEventArgs e)
{
XDocument xDoc = XDocument.Load(uriGroup); // this line
var groups = xDoc.Descendants("Group")
.Select(n => new
{
GroupName = n.Element("GroupName").Value,
GroupHeader = n.Element("GroupHeader").Value,
TimeCreated = DateTime.Parse(n.Element("TimeAdded").Value),
Tags = n.Element("Tags").Value,
Messages = n.Element("GroupMessages").Value
})
.ToList();
dataGrid2.ItemsSource = groups;
}
Run Code Online (Sandbox Code Playgroud) 嗨,我想知道你在图形屏幕上聚类数据时有没有办法在滚动时显示数据点属于哪些行?

从上面的图片中我希望有一种方法,如果我选择或滚动点,我可以告诉它属于哪一行.
这是代码:
%% dimensionality reduction
columns = 6
[U,S,V]=svds(fulldata,columns);
%% randomly select dataset
rows = 1000;
columns = 6;
%# pick random rows
indX = randperm( size(fulldata,1) );
indX = indX(1:rows);
%# pick random columns
indY = randperm( size(fulldata,2) );
indY = indY(1:columns);
%# filter data
data = U(indX,indY);
%% apply normalization method to every cell
data = data./repmat(sqrt(sum(data.^2)),size(data,1),1);
%% generate sample data
K = 6;
numObservarations = 1000;
dimensions = 6;
%% cluster
opts = statset('MaxIter', 100, 'Display', …Run Code Online (Sandbox Code Playgroud) 我需要abit帮助if语句和运算符.我怎么能这样做:
double AgePenalty = 0;
if (AgeOfCustomer <= 21)
{
AgePenalty = 15;
}
if (AgeOfCustomer <= 30 && AgeOfCustomer => 21) // cant use && operator with double
{
AgePenalty = 10;
}
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这只是说如果顾客年龄小于21岁,则申请一定的价格标签; 如果客户年龄在21到25岁之间,请使用较小的价格标签等.
所以我有一个我正在尝试实施的通用数字检查:
public static bool isNumberValid(string Number)
{
}
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我想读取文本文件的内容(仅包含数字)并检查每一行的数字并使用isNumberValid. 然后我想将结果输出到一个新的文本文件,我得到了这么远:
private void button2_Click(object sender, EventArgs e)
{
int size = -1;
DialogResult result = openFileDialog1.ShowDialog(); // Show the dialog.
if (result == DialogResult.OK) // Test result.
{
string file = openFileDialog1.FileName;
try
{
string text = File.ReadAllText(file);
size = text.Length;
using (StringReader reader = new StringReader(text))
{
foreach (int number in text)
{
// check against isNumberValid
// write the results to a new textfile
}
}
} …Run Code Online (Sandbox Code Playgroud) 新的mysql错误:
ERROR [42000] [MySQL][ODBC 3.51 Driver][mysqld-5.5.9]You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'System.Data.Odbc.OdbcCommand' at line 1
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我以前从未见过这个错误,也不知道它与之有什么关系?
using (OdbcConnection connection = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=fakepass;"))
{
// ODBC command and transaction objects
OdbcCommand command = new OdbcCommand();
OdbcTransaction transaction = null;
// tell the command to use our connection
command.Connection = connection;
try
{
// open the …Run Code Online (Sandbox Code Playgroud) 是否有任何可能的方法在Windows中"丢弃"像真正的IPS(入侵防御系统),类似于unix中的iptables.
此外,如果我使用matlab有一种方法"捕获网络上的数据包"并将其提供给神经网络?在Windows上的Matlab是.
我很难理解libpcap如何"捕获"数据但你却无法实时"丢弃"数据?
相当令人讨厌的snort不能这样做,snort只能作为Windows上的IDS,而不是Linux上的IDS/IPS,因为它能够正确规则到iptables.
我有一个mat文件,其结构如下所示:

如何规范化数据并将其另存为.dat文件(ascii)