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Tostring Cannot Be Called On Null Values


This method or prop .NET mldardy 2010-04-05 19:50:13 UTC #1 I can't get past this error in my loop through the data reader specifically dr(12). share|improve this answer answered Oct 21 '10 at 12:57 steinar 6,36211327 He didn't say that this method was hack. Homework Help Math 1/30/2010 3:18:02 AM | While reading your blog it seems that you research on this topic very much. For example, the TerritoryID column in the AdventureWorks Customer table allows null values. http://bovbjerg.net/cannot-be/tostring-in-java-lang-object-cannot-be-applied-to.php

How can the US electoral college vote be so different to the popular vote? Kegel exercises for men 2/15/2010 7:13:09 AM | Thanks for the post. What do I do? ArgumentNullException)? –Adam Mihalcin Feb 22 '12 at 15:42 It seems that you aren't the first person to get this kind of exception and post about it. additional hints

Data Is Null. This Method Or Property Cannot Be Called On Null Values. C#

Would the members of an online imageboard (or any community) be able to build a post-apocalytic society upon their reputation? Reply kanasz.rober... there's already a null coalescing operator in c# - see my post below. –Andrew Hanlon Oct 21 '10 at 13:06 I think the null coalescing operator is a little The second use of s - s.ToString() fails because you there is no ToString method to run.

You’ll be auto redirected in 1 second. string.Empty : myObj.ToString(); –Nick Larsen♦ Oct 21 '10 at 13:00 add a comment| up vote 1 down vote Holstebroe's comment would be your best answer: string s = string.Format("{0}", myObj); If The ANSI SQL-92 specification states that a null must be the same for all data types, so that all nulls are handled consistently. Isdbnull C# This isn't anything to do with the Messagebox, as illustrated below.

In fact he didn't say what was wrong with it except perhaps implying that it wasn't simple. Hope this helps. It's absolutely obvious what you want to achieve and that you're expecting null. http://stackoverflow.com/questions/9719683/data-is-null-this-method-or-property-cannot-be-called-on-null-values Bug?

idValue = (SqlInt32)row["ID"]; descriptionValue = (SqlString)row["Description"]; // Test for null value in ID column. These CLR nullable types represent an instance of the Nullable structure. I must tell you that your blog is very informative and it helps other also. The content you requested has been removed.

Data Is Null This Method Or Property Cannot Be Called On Null Values Sql Server

share|improve this answer edited Oct 28 '10 at 17:34 answered Oct 21 '10 at 13:54 jaydel 7,42383974 OMG if object is null then call ToString() on it? –codymanix Oct you could try here Can I sell a stock immediately Will I get the same result if I use 18-55mm lens at 55mm (full zoom) and 55-200mm lens at 55mm (no zoom), if not, then Data Is Null. This Method Or Property Cannot Be Called On Null Values. C# Start a coup online without the government intervening How to reduce the width of the equation in a text paragraph? Failed To Start Debugger Data Is Null. This Method Or Property Cannot Be Called On Null Values Keep in mind though it wouldn't be quite clear for the reader of the code what the intention is.

How do I deal with my current employer not respecting my decision to leave? this contact form Thanks for guiding @TimSchmelter ! –Mijevoli Mar 16 '15 at 9:12 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign I guess you don't know what i meant with "accept", you can look here: meta.stackexchange.com/questions/5234/… –Tim Schmelter Mar 16 '15 at 9:09 Got it ! Getting all its property values as string0Why am I getting a NaN is not a valid value of Int32 error?3Getting “no implicit conversion between '' and 'System.DateTime'” error message0Getting a “The Getstring Data Is Null. This Method Or Property Cannot Be Called On Null Values.

Possible repercussions from assault between coworkers outside the office Do we know Ford's old name? I get an error whenever any of the columns return a NULL value: public class ClientGroupDetails { public String Col2; public String Col3; public ClientGroupDetails(String m_Col2, String m_Col3) { Col2 = But I think this wont work for interfaces because it cannot decide which interface to chose (since multiple interfaces are allowed per class). –codymanix Oct 21 '10 at 13:39 have a peek here Not the answer you're looking for?

Alice 11/26/2010 1:38:45 PM | Thanks for this cool blog.This is very interesting and informative. Vent kitchen hood vent to roof turbine vent? textBox_tlate.Text = sql_command.ExecuteScalar().ToString(); Also use using statement to dispose your connection and command automatically.

Browse other questions tagged c# sql-server null or ask your own question.

apple 6/17/2010 12:34:44 AM | Thanks for sharing. isColumnNull = idValue.IsNull; // Display variable values in console window. asked 9 months ago viewed 54 times active 9 months ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Get the weekly newsletter! This could be fixed using a ToString and a proper format string (IE: yyyy-MM-dd) but the correct way to handle this is through a parameterized query sql_command = new MySqlCommand(@"select sum(lt_min_hours)

Can a president win the electoral college and lose the popular vote Polyglot Anagrams Cops' Thread Why is the 'You talking to me' speech from the movie 'Taxi Driver' so famous? This method or property cannot be called on Null values. [Answered]RSS 10 replies Last post Apr 06, 2010 10:51 AM by bootzilla ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Unless you absolutely don't want to have a null string, this should work just fine: string myStr = (string)myObj; // string in a object disguise or a null share|improve this answer http://bovbjerg.net/cannot-be/tostring-in-java-lang-object-cannot-be-applied-to-char.php Please try again.

Somebody found this kind of issue when working with TFS, and the concrete exception type was SqlNullValueException (see social.msdn.microsoft.com/Forums/en-US/tfsversioncontrol/thr‌ead/…). –Adam Mihalcin Feb 22 '12 at 15:43 This is not In my mind it's definitely the clearest solution. The reason (of course) is that the sproc returns null because the movie hasn't got any genres, but I just can't figure out how to prevent this exception being thrown. This method or property cannot be called on Null values up vote 22 down vote favorite 3 I'm working on an application where one can get information on movies from a

Was it legal to rant against trick or treating via loudspeaker during halloween? Can you explain more? In this way, the parsing of the parameters is done by the MySql engine that knows how to handle a DateTime variable. Using IS NULL to test for null values always works, regardless of the ANSI_NULLS settings for a connection.Setting ANSI_NULLS off is not supported in a DataSet, which always follows the ANSI

As I understand it, this is what you were looking for. asked 4 years ago viewed 5033 times active 4 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Linked 3 Getting “no implicit conversion between '' and 'System.DateTime'” error CLR nullable types are not intended for storage of database nulls because an ANSI SQL null does not behave the same way as a null reference (or Nothing in Visual Basic). c# string exception null tostring share|improve this question edited Apr 18 '12 at 18:48 yoozer8 4,98442861 asked Jan 25 '11 at 12:39 MartW 9,80023052 The safe way to do-

string returnValue = SqlString.Equals(string1, string2).ToString(); return returnValue; } private static string StringEquals(SqlString string1, SqlString string2) { // String.Equals uses CLR type semantics for evaluating nulls. I just added what Luann said :) .. And MessageBox.Show() is probably implemented to ignore null and print out empty message box. Should I report it?