nullreferenceexception

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Checking if an object is null in C#

I would like to prevent further processing on an object if it is null. In the following code I check if the object is null by either:[详细]

2023-03-14 10:12 分类：问答
c# winform Invoke throws NullReferenceException

i\'m working on an winform(mdi) pro. And I need to update a dataGridView control when i get new data from another thread. and when new data comes and i\'m dragging the dataGridview scroll, it throw a[详细]

2023-03-14 08:30 分类：问答
Nullreference exception was unhandled

I am creating a microsoft WPF project and ran into the following hindrance: Null re开发者_如何学JAVAference was unhandled Object reference not set to an instance of an object[详细]

2023-03-13 15:55 分类：问答
C# why null after casting

Hi everyone pleas help me i so confused why my code has a null after casting this is the xaml code i have[详细]

2023-03-13 00:27 分类：问答
C# gives NullReferenceException while processing lists

The following code gives a NullReferenceException while processing. Can anyone tell me why its happening, and how to fix it? thanks in advance! this might be a very simple thing, I\'m missing somewher[详细]

2023-03-11 12:15 分类：问答
Visual Studio Debugger exception on launch

When launching my WinForms pro开发者_StackOverflow社区ject (project only contains one source file, Program.cs), the debugger breaks with no stack trace on the following exception:[详细]

2023-03-11 11:48 分类：问答
NullReferenceException on DropDownListFor after [HttpPost]

In my application I\'am populating a dropdownlist from database using ADO Entity Framework, after this when i try to submit the form the value of the dropdown list it is giving Null reference exceptio[详细]

2023-03-10 04:14 分类：问答
NullReferenceException in SubSonic's 2.2 RecordBase.cs after Json request. Why?

I have an MVC project that consumes a WCF service.The service returns a collection of locations that is used to filter for autocomplete in a text box.[详细]

2023-03-09 23:58 分类：问答
NullReferenceException when trying to set class property

Basically I have 2 classes, \"Manifest\" and \"BrowserAction\", set out like this: public class BrowserAction[详细]

2023-03-09 05:31 分类：问答
TypeInitializationException and NullReferenceException in Gallio when calling a shared member of a class

I\'m trying to use Gallio and MbUnit (version 3.2.750). As per the tutorial ( http://gallio.org/wiki/doku.php?id=getting_started:my_first_tests ), I created a new class project, referenced the other[详细]

2023-03-09 04:24 分类：问答