invalidoperationexception

Why would 'this.ContentTemplate.FindName' throw an InvalidOperationException on its own template?

由 丶灬走出姿态 提交于 2019-11-28 09:10:35
Ok... this has me stumped. I've overridden OnContentTemplateChanged in my UserControl. I'm checking that the value passed in for newContentTemplate does in fact equal this.ContentTemplate (it does) yet when I call this... var textBox = this.ContentTemplate.FindName("EditTextBox", this); ...it throws the following exception... "This operation is valid only on elements that have this template applied." Per a commenter in another related question, he said you're supposed to pass in the content presenter for the control, not the control itself, so I then tried this... var cp = FindVisualChild

The query results cannot be enumerated more than once?

由 淺唱寂寞╮ 提交于 2019-11-27 16:02:51
问题 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

InvalidOperationException - object is currently in use elsewhere - red cross

由 ♀尐吖头ヾ 提交于 2019-11-27 14:56:56
I have a C# desktop application in which one thread that I create continously gets an image from a source(it's a digital camera actually) and puts it on a panel(panel.Image = img) in the GUI(which must be another thread as it is the code-behind of a control. The application works but on some machines I get the following error at random time intervals(unpredictable) ************** Exception Text ************** System.InvalidOperationException: The object is currently in use elsewhere. Then the panel turns into a red cross, red X - i think this is the invalid picture icon that is editable from

How to evade reentrant call to setCurrentCellAddressCore?

由 巧了我就是萌 提交于 2019-11-27 06:14:02
问题 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]

nullable object must have a value

由 一个人想着一个人 提交于 2019-11-27 03:24:35
There is paradox in the exception description: Nullable object must have a value (?!) This is the problem: I have a DateTimeExtended class, that has { DateTime? MyDataTime; int? otherdata; } and a constructor DateTimeExtended(DateTimeExtended myNewDT) { this.MyDateTime = myNewDT.MyDateTime.Value; this.otherdata = myNewDT.otherdata; } running this code DateTimeExtended res = new DateTimeExtended(oldDTE); throws an InvalidOperationException with the message: Nullable object must have a value. myNewDT.MyDateTime.Value - is valid and contain a regular DateTime object. What is the meaning of this

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

由 耗尽温柔 提交于 2019-11-27 03:09:45
问题 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? 回答1: MD5 is not FIPS compliant. You can use instead of the MD5 one of the following hashing algorithms: HMACSHA1 MACTripleDES SHA1CryptoServiceProvider 回答2: When you enforce FIPS compliance in the Windows security policy settings, you're asserting that you are only going to use FIPS-certified

Why would 'this.ContentTemplate.FindName' throw an InvalidOperationException on its own template?

由 白昼怎懂夜的黑 提交于 2019-11-27 02:44:56
问题 Ok... this has me stumped. I've overridden OnContentTemplateChanged in my UserControl. I'm checking that the value passed in for newContentTemplate does in fact equal this.ContentTemplate (it does) yet when I call this... var textBox = this.ContentTemplate.FindName("EditTextBox", this); ...it throws the following exception... "This operation is valid only on elements that have this template applied." Per a commenter in another related question, he said you're supposed to pass in the content

InvalidOperationException - object is currently in use elsewhere - red cross

由 送分小仙女□ 提交于 2019-11-26 16:58:02
问题 I have a C# desktop application in which one thread that I create continously gets an image from a source(it's a digital camera actually) and puts it on a panel(panel.Image = img) in the GUI(which must be another thread as it is the code-behind of a control. The application works but on some machines I get the following error at random time intervals(unpredictable) ************** Exception Text ************** System.InvalidOperationException: The object is currently in use elsewhere. Then the

nullable object must have a value

由 风格不统一 提交于 2019-11-26 10:28:44
问题 There is paradox in the exception description: Nullable object must have a value (?!) This is the problem: I have a DateTimeExtended class, that has { DateTime? MyDataTime; int? otherdata; } and a constructor DateTimeExtended(DateTimeExtended myNewDT) { this.MyDateTime = myNewDT.MyDateTime.Value; this.otherdata = myNewDT.otherdata; } running this code DateTimeExtended res = new DateTimeExtended(oldDTE); throws an InvalidOperationException with the message: Nullable object must have a value.

ASP.NET MVC: No parameterless constructor defined for this object

由 时间秒杀一切 提交于 2019-11-26 00:54:29
问题 Server Error in \'/\' Application. -------------------------------------------------------------------------------- No parameterless constructor defined for this object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.MissingMethodException: No parameterless constructor defined for this object. Source Error: Line 16:
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