Object reference not set to an instance of an object - error

Posted by qwerty on Stack Overflow See other posts from Stack Overflow or by qwerty
Published on 2010-06-13T11:07:25Z Indexed on 2010/06/13 11:12 UTC
Read the original article Hit count: 234

Filed under:

c#

|

ms-access

|

visual

|

oledbconnection

Hello,

I'm trying to insert in an Access Database, from visual C#. But i got this error: error

What am I doing wrong in code? The values are correct, they comes from the input boxes.

Thanks!

© Stack Overflow or respective owner

Related posts about c#

.NET WebRequest.PreAuthenticate not quite what it sounds like

as seen on West-Wind - Search for 'West-Wind'
I’ve run into the problem a few times now: How to pre-authenticate .NET WebRequest calls doing an HTTP call to the server – essentially send authentication credentials on the very first request instead of waiting for a server challenge first? At first glance this sound like it should be easy:… >>> More
HttpWebRequest and Ignoring SSL Certificate Errors

as seen on West-Wind - Search for 'West-Wind'
Man I can't believe this. I'm still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates at least according to… >>> More
The dynamic Type in C# Simplifies COM Member Access from Visual FoxPro

as seen on West-Wind - Search for 'West-Wind'
I’ve written quite a bit about Visual FoxPro interoperating with .NET in the past both for ASP.NET interacting with Visual FoxPro COM objects as well as Visual FoxPro calling into .NET code via COM Interop. COM Interop with Visual FoxPro has a number of problems but one of them at least got a lot… >>> More
Dynamic Type to do away with Reflection

as seen on West-Wind - Search for 'West-Wind'
The dynamic type in C# 4.0 is a welcome addition to the language. One thing I’ve been doing a lot with it is to remove explicit Reflection code that’s often necessary when you ‘dynamically’ need to walk and object hierarchy. In the past I’ve had a number of ReflectionUtils that used string based expressions… >>> More
Finding a Relative Path in .NET

as seen on West-Wind - Search for 'West-Wind'
Here’s a nice and simple path utility that I’ve needed in a number of applications: I need to find a relative path based on a base path. So if I’m working in a folder called c:\temp\templates\ and I want to find a relative path for c:\temp\templates\subdir\test.txt I want to receive back subdir\test… >>> More

Related posts about ms-access

SQLAuthority News – MS Access Database is the Way to Go – April 1st Humor

as seen on SQL Authority - Search for 'SQL Authority'
First of all, today is April 1- April Fool’s Day, so I have written this post for some light entertainment. My friend has just sent me an email about why a person should go for Access Database. For a short background, I used to be an MS Access user once (I will not call myself MS Access DBA), and… >>> More
LINKED TABLES BETWEEN MS ACCESS 2003 AND MS ACCESS 2007-WRITE PERMISSIONS DENIED

as seen on Super User - Search for 'Super User'
We are in the process of switching over to ACCESS 2007. We have numerous data tables in ACCESS 2003 files. In one case, the user has 2007 on his PC and opend the front end in 2007. No problems. When the the user is done, he clicks a button that executes a macro full of update queries. The macro… >>> More
Working with Compressed (zipped) folders in MS Access

as seen on Internet.com - Search for 'Internet.com'
Doug Steele presents a simple technique to add zip files from within your application. >>> More
Extending the InputBox function for MS Access Forms

as seen on Internet.com - Search for 'Internet.com'
While it's not possible to change the behavior of the InputBox function, this article illustrates how to create your own Access form that includes a text box with its InputMask property set to Password, and then use that form instead of the one generated by the VBA InputBox function. >>> More
Uses for Cartesian Products in MS Access

as seen on Internet.com - Search for 'Internet.com'
Less well known than inner and outer joins is the Cartesian product, which produces every possible combination of records between the two tables. Doug Steele offers four examples to demonstrate some legitimate uses for Cartesian products. >>> More