visual-c#-express-2010

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 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 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 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'm new to C# Programming, and instead of just letting me run the code by pressing F5, "Attach..." appears where the Run button should be and it won't let me run the code. This has happened me twice by now and I don't know how to make the "Run" button appear again, because I can't test any program I write. 回答1: Make sure you have your solution opened, then right click on your project > Set as Start Up Project 回答2: You probably used option recent files which is next to recent projects and

问题 This question already has answers here : How to Draw a Rounded Rectangle with WinForms (.NET)? (6 answers) Closed last year . I am using this code to make the form have no border style: this.FormBorderStyle = FormBorderStyle.None; I need to make rounded edges on the form. Is there an easy way? How do I do it? 回答1: Take a look at this: http://msdn.microsoft.com/en-us/library/system.windows.forms.control.region.aspx The Form class inherits from the Control class, so try doing the same sample

问题 The conversion of a varchar data type to a datetime data type resulted in an out-of-range value error I'm trying to enter data into my table using a form, the date formats in both the form validation and the sql server are both dd/mm/yy, however when i try to submit data from the form with a day higher than 12 (e.g. 13/12/2012) it throws an exception whose cause is "The conversion of a varchar data type to a datetime data type resulted in an out-of-range value error", and if i try to enter

问题 I am using visual c# express 2010. I need an installer that will allow a person to choose where to install the application, and as well as install the .Net framework.. I also need customize what the nstaller looks like.. Are there any installers I can use that are easy to use? I am 16, so I am not that good at installers and stuff. 回答1: Seeing how young you are I'm guessing that this should be free or as close to free as possible. There are several options for making installers with free

问题 In my application I have a DataSet that holds tables that are used in different forms, all over my application. To be able to maintain concurrency between forms, and not having to get data from the database every time the user opens a new form, I hold my DataSet as a static field in the program class like this: static class Program { public static CustomDataSet StockDataSet { get; private set; } [STAThread] static void Main() { StockDataSet = new Database.CustomDataSet(); StockDataSet

问题 I have this code that will grab the names, but how do i get each program's icon? string SoftwareKey = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Installer\\UserData\\S-1-5-18\\Products"; RegistryKey rk = default(RegistryKey); rk = Registry.LocalMachine.OpenSubKey(SoftwareKey); string sname = string.Empty; foreach (string skname in rk.GetSubKeyNames()) { try { sname = Registry.LocalMachine.OpenSubKey(SoftwareKey).OpenSubKey(skname).OpenSubKey("InstallProperties").GetValue("DisplayName")