object-reference

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Object reference not set to an instance of an object, null

i keep getting this error message: Object reference not set to an instance of an object. private static void GetIPInfo(User user)[详细]

2023-04-13 08:16 分类：问答
On ASP.NET form submit it throws an Object reference not set to an instance of an object.

I have a simple email form written in ASP.NET with the logic in the codebehind file. It\'s all in C# (the logic that is...). Anyways, on page load I have the following:[详细]

2023-04-13 01:27 分类：问答
Does Javascript equal sign reference objects or clones them?

In MyApp.something.BigObject I have a memory expensive object an开发者_JAVA百科d I like to do this var theObject = MyApp.something.BigObject;. My question is would that take up double the memory or no[详细]

2023-04-06 06:57 分类：问答
Find if a directory has a parent

private void anotherMethod() { 开发者_开发知识库DirectoryInfo d = new DirectoryInfo(\"D\\\\:\");[详细]

2023-04-01 23:27 分类：问答
Java Object Reference and Java Methods

I am unable to understand how this works public void addToRule(Rule r) { if (!getRuleList().contains(r)) {[详细]

2023-04-01 07:51 分类：问答
Object reference not set to an instance of an object... Error while using foreach [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate:开发者_开发问答 What is a NullReferenceException in .NET?[详细]

2023-03-23 06:36 分类：问答
C# garbage collection with object references

In C#开发者_开发技巧, when I have two object obj1, obj2 composed of a List<string> and I assign both of those objects to the same List<string> object.[详细]

2023-03-17 14:14 分类：问答
Object Relationship Design

I just happen to ponder of a OO concept which may sound quite trivial but I don\'t know why I find it quite confusing.[详细]

2023-03-10 07:04 分类：问答
Saving a PDF document seems to be keeping a reference in memory (VB.NET)

I have a VB.NET user control that is saving a PDF document and then displaying that in a WebBrowser control.The code looks like this:[详细]

2023-03-08 03:31 分类：问答
Object reference null- URL rewriting asp.net

I have developed my asp.net website in .NET 2.0 in other system where it is working fine. Now when I copied the asp.net website in my system and run it than I am getting the run time error:[详细]

2023-02-20 21:04 分类：问答