invalidoperationexception

Error:A referential integrity constraint violation occurred on db.SaveChanges() in .net?

▼魔方 西西 提交于 2019-12-01 09:43:48
问题 I have a created a WPF application with Entity framework 4.0. When i am trying to insert record in PhoneNumber Table it inserts first record successfully. But, when i loop through some List and try to insert another item into PhoneNumber table it Insert the record but shows error as: InvalidOperationException was handled by user code: The changes to the database were committed successfully, but an error occurred while updating the object context. The ObjectContext might be in an inconsistent

Invalid Operation Exception from C# Process Class

蹲街弑〆低调 提交于 2019-12-01 02:25:41
When I use VSTS debugger to see the properties of instance of class Process , many of the properties are marked with InvalidOperationException . Why? Am I doing anything wrong? I am using VSTS 2008 + C# + .Net 2.0 to develop a console application. Here is my code: System.Diagnostics.Process myProcess = new System.Diagnostics.Process(); myProcess.StartInfo.FileName = "IExplore.exe"; myProcess.StartInfo.Arguments = @"www.google.com"; myProcess.StartInfo.Verb = "runas"; myProcess.Start(); And a screenshot of the debugger: Had you actually started the process when the debugger picture was taken?

InvalidOperationException - When ending editing a cell & moving to another cell

北战南征 提交于 2019-11-29 15:00:57
I made a program in which I wanted to manually update the Data Grid View. -I have a Method to Refresh the DGV by clearing it and then reinserting the data. -Using the designer, I made an event handler for the DGV's CellEndEdit. Inside the Event Handler, the data gets updated & the DGV's custom refreshing method is called. While running the program, whenever I start editing a cell & end it by selecting another one, an exception is thrown: InvalidOperationException Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function. Visual C#'s debugger marks

System.InvalidOperationException due to collection modification on call to Application.Exit()

。_饼干妹妹 提交于 2019-11-29 10:12:36
I've got this really, really weird error that I've never been able to pin down (it happens very rarely). Basically, I have a C# application that was randomly throwing an unknown exception on exit. I've managed to catch it in the debugger this time, and it turns out that calling Application.Exit() is throwing a System.InvalidOperationException with the following message: A first chance exception of type 'System.InvalidOperationException' occurred in mscorlib.dll Additional information: Collection was modified; enumeration operation may not execute. I'm not sure what this collection that has

The query results cannot be enumerated more than once?

我们两清 提交于 2019-11-29 01:31:03
I'm using LINQ to SQL to get a search result of a FullTextSearch stored procedure in Sql server 2008. I dragged the procedure from the server explorer to the designer, and got the method created with the appropriate return type and parameters. Now the problem is, I need to get the Count of the result of calling this method, so using my repository method (which will call the Sproc method and return the result as IQueryable) I make the following call. var result = repository.FullTextSearch(searchText); int resultsCount = result.Count(); var ret = result.Skip((pageNumber - 1) * PageSize).Take

How to evade reentrant call to setCurrentCellAddressCore?

北城余情 提交于 2019-11-28 12:19:41
I have a function that is called from cell_endedit. It moves a dataGridViewRow inside a dataGridView: private void moveRowTo(DataGridView table, int oldIndex, int newIndex) { if (newIndex < oldIndex) { oldIndex += 1; } else if (newIndex == oldIndex) { return; } table.Rows.Insert(newIndex, 1); DataGridViewRow row = table.Rows[newIndex]; DataGridViewCell cell0 = table.Rows[oldIndex].Cells[0]; DataGridViewCell cell1 = table.Rows[oldIndex].Cells[1]; row.Cells[0].Value = cell0.Value; row.Cells[1].Value = cell1.Value; table.Rows[oldIndex].Visible = false; table.Rows.RemoveAt(oldIndex); table.Rows

Windows Application has stopped working :: Event Name CLR20r3

放肆的年华 提交于 2019-11-28 12:01:37
I developed an applicatin using Visual Studio.Net 2008 Team System with Infragistics Net Advantage Tools 2010.3 and made a Setup Exe file for my application and installed on client machines where they have both Windows7 32 bit and WindowsXP Service Pack 2. ( I have also tried both way by Setup Property TargetPlatform x86 and x64) But when i install and run this application (exe) file in development machine its installed and run correctly. Only on Client's machine its installed correctly but not running, giving the error when double clicking on the exe file. The Complete Error is following:

How can I add logic to an existing dependency-property callback?

▼魔方 西西 提交于 2019-11-28 11:04:10
I'm trying to add a PropertyChangedCallback to UIElement.RenderTransformOriginProperty. An exception is thrown when I try to override the PropertyMetadata. I have searched MSDN and Google, and all I have been able to come up with is this . DependencyPropertyDescriptor.AddValueChanged is suggested at some point in that post, but that won't solve my problem since this is not a per-instance callback. I don't understand what this exception means at all. Does anyone know what I am doing wrong? public class foo : FrameworkElement { private static void Origin_Changed( DependencyObject d,

ASP.NET Web Method that accepts a List<CustomObject> is failing with “Web Service method name is not valid.”

馋奶兔 提交于 2019-11-28 10:18:09
I want to create a web method that accepts a List of custom objects (passed in via jQuery/JSON). When I run the website locally everything seems to work. jQuery and ASP.NET and everyone is happy. But when I put it on one of our servers it blows up. jQuery gets a 500 error after the ajax request with the response being: System.InvalidOperationException: EditCustomObjects Web Service method name is not valid. Here's the web service method: [WebMethod] public void EditCustomObjects(int ID, List<CustomObject> CustomObjectList) { // Code here } And my jQuery code (which I don't think matters, since

Is there an alternate hashing algorithm to MD5 for FIPS-enabled systems?

安稳与你 提交于 2019-11-28 09:43:21
Whenever I try to use MD5 on a Windows XP machine that has FIPS enabled, I am getting a System.InvalidOperationException . Is there an alternate algorithm that I should use instead of MD5 on FIPS? MD5 is not FIPS compliant. You can use instead of the MD5 one of the following hashing algorithms: HMACSHA1 MACTripleDES SHA1CryptoServiceProvider When you enforce FIPS compliance in the Windows security policy settings, you're asserting that you are only going to use FIPS-certified encryption and hashing algorithms. MD5 is not one of these approved hashing algorithms, and that's why the exception is