argumentexception

问题 I'm attempting to get a KBDLLHOOKSTRUCT from a keyboard-hook's lParam. private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam) { KBDLLHOOKSTRUCT kbd = new KBDLLHOOKSTRUCT(); Marshal.PtrToStructure(lParam, kbd); // Throws System.ArguementException ... Unfortunately the PtrToStructure is throwing two A first chance exception of type 'System.ArgumentException' occurred in myprogram.exe errors every time a key is pressed. It also stops that method in its tracks. MSNDA says:

问题 I am trying to create a white picture (greyscale format). So here is the code I use: Bitmap bmp = new Bitmap(1, 1, System.Drawing.Imaging.PixelFormat.Format16bppGrayScale); bmp.SetPixel(0, 0, Color.FromArgb(255, 255, 255)); bmp = new Bitmap(bmp, i.Width, i.Height); "I" is an existing Bitmap image. I am playing with its channels. The principle is to create a 1 pixel image in greyscale, give this pixel the white color and then enlarge it to the good size. But I have this as a result: "An

问题 I'm currently having the most irritating error in a program i'm making and i would seriously appreciate any help or advice that could help me fix it. The part of the program that i'm having a problem with is a form that loads up a selected image into a picturebox and then saves it into an MS Access database upon the click of the 'save' button. When executing the "Browse_Click" event, it prompts you to search for an image location and loads it into a picturebox (pbImage). This bit works fine

问题 static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new SpaceInvaders());// i get an error here when i start the form application.. it says Argument Exception. Parameter is not valid } My main Form looks like that: public SpaceInvaders() { InitializeComponent(); } public void SpaceInvaders_Load(object sender, EventArgs e) { } here is stack trace " at System.Drawing.Graphics.GetHdc()\r\n at System.Drawing.BufferedGraphics

问题 in my WP7/8 app I get sometimes the following error message from my users (can't reproduce the issue here). [Type]:[ArgumentException] [ExceptionMessage]:[Value does not fall within the expected range.] [StackTrace]:[ at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.Dictionary`2.Insert(Date key, WorkDay value, Boolean add) at MyProject.Core.Data.WorkDayCache.GetWorkDay(Date date, Boolean returnCorrected) at MyProject.Core.Calculations

问题 Could I start using CodeContracts instead of: if (XXX == Y) throw new ArgumentException("bla bla"); How does it work if I develop a library and my library users do not use CodeContracts? 回答1: Assuming that the code using code contracts is run through the binary rewriter, it will throw exceptions like code you posted. The re-writer goes through the code and replaces the contract code with argument checking etc. It's kinda like aspect oriented programming. It injects code to handle situations

问题 I have a DatagridView with two DataGridViewComboBoxCell: Administration Employee. What I want to do is when I select an administration from 1st DataGridViewComboBoxCell, I'll get the list of the employees of selected Admininstration in the 2nd DataGridViewComboBoxCell. I binded the first DataGridViewComboBoxCell manually to administrationBindingSource and I tried this answer code, This is the code I used: dataGridView1.CellValueChanged += new DataGridViewCellEventHandler(dataGridView1

问题 I need download a CSV file and then read it. Here is my code: tickerValue = "goog" Dim strURL As String = "http://ichart.yahoo.com/table.csv?s=" & tickerValue Dim strBuffer As String = RequestWebData(strURL) Using streamReader = New StreamReader(strBuffer) Using reader = New CsvReader(streamReader) I keep getting this error: An unhandled exception of type 'System.ArgumentException' occurred in mscorlib.dll Additional information: Illegal characters in path. What am I doing wrong? Additional

问题 I often have functions that take arguments like this: Public Shared Function F(ByVal address as String) So basically I want to throw new ArgumentException("Invalid address!", "address") Now problem is that when I'm using the built in refactoring tools to rename the local variables, (let's say i rename address to addr), The string in my argument exception is still "address" and not "addr"! I'm wondering what's the best solution to this problem? (other than manually tracking or with Ctrl-F

问题 I am using HttpWebRequest to fetch some twitter-API-like Json resource, the scenario is that after logining the app with XAuth-Authentication, the app will use an API(http://api.xxx.com/account/notification.json) to get the respose Json. My HttpWebRequest Method is as followed: public void Request(string url) { var request = (HttpWebRequest)HttpWebRequest.Create(url); IAsyncResult result = null; result = (IAsyncResult)request.BeginGetResponse(ResponseCallback, request); } private void