.net

问题 public static int[,] operator *(int[,] arr1, int[,] arr2) { int sum; int[,] res = new int[arr1.GetLength(0), arr2.GetLength(1)]; for (int i = 0; i < arr1.GetLength(0); i++) { for (int j = 0; j < arr2.GetLength(1); j++) { sum = 0; for (int k = 0; k < arr1.GetLength(1); k++) { sum = sum + (arr1[i, k] * arr2[k, j]); } res[i, j] = sum; //Console.Write("{0} ", res[i, j]); } //Console.WriteLine(); } return res; } Here i am trying to overload * operator to multiply two matrices.. but the compiler

问题 I am having trouble calling a program with the Process class to start a program. The hierarchy to the executable is in under the bin directory while the current working directory needs to be under the lib directory. /project /bin a.out (this is what I need to call) /lib (this is where I need to be in order for a.out to work) I have set the WorkingDirectory = "path/lib" and the "FileName = "../bin/a.out" . However I am getting an error of: Unhandled Exception: System.ComponentModel

问题 How exactly is string[] args populated in a C# Main method? For instance, is white space stripped? Are any of the elements ever empty string or null? How are single and double quotes handled? MSDN doesn't explain how and merely says The parameter of the Main method is a String array that represents the command-line arguments 回答1: When you start a process, you can pass a string as your argument. How those are arranged and split up is entirely up to you. So if using the Windows command line,

问题 I am having trouble calling a program with the Process class to start a program. The hierarchy to the executable is in under the bin directory while the current working directory needs to be under the lib directory. /project /bin a.out (this is what I need to call) /lib (this is where I need to be in order for a.out to work) I have set the WorkingDirectory = "path/lib" and the "FileName = "../bin/a.out" . However I am getting an error of: Unhandled Exception: System.ComponentModel

问题 I am having trouble calling a program with the Process class to start a program. The hierarchy to the executable is in under the bin directory while the current working directory needs to be under the lib directory. /project /bin a.out (this is what I need to call) /lib (this is where I need to be in order for a.out to work) I have set the WorkingDirectory = "path/lib" and the "FileName = "../bin/a.out" . However I am getting an error of: Unhandled Exception: System.ComponentModel

问题 I am having trouble calling a program with the Process class to start a program. The hierarchy to the executable is in under the bin directory while the current working directory needs to be under the lib directory. /project /bin a.out (this is what I need to call) /lib (this is where I need to be in order for a.out to work) I have set the WorkingDirectory = "path/lib" and the "FileName = "../bin/a.out" . However I am getting an error of: Unhandled Exception: System.ComponentModel

问题 Yes, I know this has been discussed many times before, and I read all the posts and comments regarding this question, but still can't seem to understand something. One of the options that MSDN offers to solve this violation, is by returning a collection (or an interface which is implemented by a collection ) when accessing the property, however clearly it does not solve the problem because most collections are not immutable and can also be changed. Another possibility I've seen in the answers

问题 Yes, I know this has been discussed many times before, and I read all the posts and comments regarding this question, but still can't seem to understand something. One of the options that MSDN offers to solve this violation, is by returning a collection (or an interface which is implemented by a collection ) when accessing the property, however clearly it does not solve the problem because most collections are not immutable and can also be changed. Another possibility I've seen in the answers

问题 Please read the question carefully before voting to close it. That is not a duplicate. I am trying to build a generic method that returns list of entities of type T joined to logs of type AuditLog. Here is a LEFT JOIN interpretation in LINQ that I use var result = from entity in entitySet from auditLog in auditLogSet.Where(joinExpression).DefaultIfEmpty() select new { entity, auditLog }; return result.GroupBy(item => item.entity) .Select(group => new { Entity = group.Key, Logs = group.Where(i

问题 I have created following code Dim ConnectionString As String = ConfigurationManager.ConnectionStrings("default").ConnectionString Dim con As New SqlConnection(ConnectionString) con.Open() Response.Write("Connection Opened<br/>") con.Close() Response.Write("Connection Closed<br/>") in a web application project Target .NET Framework 4.0 but it is giving System.AccessViolationException i cannot understand why. if i change the target Framework to .NET 3.0 then the code runs fine. Below is the