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Tostring Cannot Be Called On Null Values

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How to capture disk usage percentage of a partition as an integer? twitter Tweets about "asp.net" Calendar <> MoTuWeThFrSaSu311234567891011121314151617181920212223242526272829301234567891011 Recent postswpscan.rb LoadErrorComments: 0Not rated yetRESTORE DATABASE is terminating abnormallyComments: 0Not rated yetInsecure Transport – Missing Public Key PinningComments: 0Not rated yetASP.NET - Someone peeled an American flag sticker off of my truck. Vent kitchen hood vent to roof turbine vent? http://rinfix.com/cannot-be/tostring-in-java-lang-object-cannot-be-applied-to-int.html

only the IIF function Serenarules 2010-04-06 16:01:31 UTC #5 For future reference, you can look at the following cheat sheet. null : reader.GetInt32(genreIDIndex) }); share|improve this answer answered Mar 15 '12 at 12:37 kaj 3,3451915 4 you might need to add the code as reader.IsDBNull(movieGenreIDIndex) ? (int?)null : reader.GetInt32(movieGenreIDIndex) –akd 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 more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed http://stackoverflow.com/questions/29072421/data-is-null-this-method-or-property-cannot-be-called-on-null-value-after-joini

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

asked 4 years ago viewed 23606 times active 3 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Get the weekly newsletter! How can the US electoral college vote be so different to the popular vote? These CLR nullable types represent an instance of the Nullable structure. For more information on working with CLR nullable types in Visual Basic see Nullable Value Types (Visual Basic), and for C# see Using Nullable Types (C# Programming Guide).Nulls and Three-Valued LogicAllowing

Use the IsNull property to check for nulls.Null values can be assigned to a DataColumn as shown in the following code example. Related 1sproc using 'for xml' and then ExecuteXmlReader in C# -> “Data is Null. OBDII across the world? Isdbnull C# How can the US electoral college vote be so different to the popular vote?

This method or property can... Data Is Null This Method Or Property Cannot Be Called On Null Values Sql Server null : reader.GetInt32(movieGenreIDIndex), GenreID = reader.IsDBNull(genreIDIndex) ? If you consider the second to be a hack, you're best bet is to just write a utility function which performs the null check. –Nick Larsen♦ Oct 21 '10 at 12:55 anchor share|improve this answer answered Apr 18 '12 at 10:37 James 411 2 Can you show us this behind the scenes because I surely can't find it in mscorlib... –Robert Koritnik

In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms The following truth tables show how the AND, OR, and NOT operators function in the presence of a null value. (T=true, F=false, and U=unknown, or null.)Understanding the ANSI_NULLS OptionSystem.Data.SqlTypes provides the The ANSI SQL-92 specification states that a null must be the same for all data types, so that all nulls are handled consistently. Word for a Fact Believed by a Sub-Culture What is the most someone can lose the popular vote by but still win the electoral college?

  • In fact he didn't say what was wrong with it except perhaps implying that it wasn't simple.
  • That is x.SomeExtensionMethod() is syntactic sugar for SomeStaticClass.SomeExtensionMethod(x); Thus, when x is null we are not attempting to invoke a method on a null object but rather passing a null object
  • See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]>
  • Handling Null Values .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 4 .NET Framework 3.5 .NET Framework 2.0  A null value in a relational database is used when
  • The construct pufa mentions is listed under "Choices".
  • You are losing ALL context information.
  • Direct assignment as you have done allows those errors to occur.
  • Alice 11/26/2010 1:38:45 PM | Thanks for this cool blog.This is very interesting and informative.

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

Privacy Statement| Terms of Use| Contact Us| Advertise With Us| CMS by Umbraco| Hosted on Microsoft Azure Feedback on ASP.NET| File Bugs| Support Lifecycle Javascript is disabled:Click here to learn how http://stackoverflow.com/questions/35361879/data-is-null-this-method-or-property-cannot-be-called-on-null-value-mysql-to-t As I understand it, this is what you were looking for. Data Is Null. This Method Or Property Cannot Be Called On Null Values. C# Apr 05, 2010 04:41 PM|[email protected]|LINK As said above value for dr(12) might benull/empty in which case you are doinga cast anditerrors out. Failed To Start Debugger Data Is Null. This Method Or Property Cannot Be Called On Null Values asked 6 years ago viewed 32110 times active 2 months ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Get the weekly newsletter!

What do I do? http://rinfix.com/cannot-be/value-close-cannot-be-called-while-doing-createhandle.html The opposite is true for a DataTable: a null value is implicit and the default value is explicit.All missing column values for rows read from XML input are assigned NULL. Here's a link to the manual page for this: IsNull MSDN reference Basically, you'll change your SQL text to look similar to this: "select IsNull(col2, ''), IsNull(col3, '') where col1 = Bug? Getstring Data Is Null. This Method Or Property Cannot Be Called On Null Values.

In the context of this quote, how many 'chips/sockets' do personal computers contain? How to capture disk usage percentage of a partition as an integer? A comparison can evaluate to one of three conditions:TrueFalseUnknownBecause null is considered to be unknown, two null values compared to each other are not considered to be equal. http://rinfix.com/cannot-be/tostring-in-java-lang-object-cannot-be-applied-to.html Is it possible to sheathe a katana as a free action?

data is null3Empty Textbox still saves data in SQL Server even columns in table are not allowed null0Data is Null This method or property cannot be called on Null values error Usually these problems are avoided using parameterized queries –Steve Feb 12 at 13:20 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using My cat sat on my laptop, now the right side of my keyboard types the wrong characters Is it possible to sheathe a katana as a free action?

This method or property cannot be called on null value " occurred.

string returnValue = string1.Equals(string2).ToString(); return returnValue; } } The code produces the following output: Copy SqlString.Equals shared/static method: Two nulls=Null String.Equals instance method: Two nulls=True SqlString.Equals shared/static method: Two empty strings=True My cat sat on my laptop, now the right side of my keyboard types the wrong characters Is adding the ‘tbl’ prefix to table names really a problem? 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 TSA broke a lock for which they have a master key.

Not the answer you're looking for? Does an Eldritch Knight's war magic allow Extra Attacks? This method or property cannot... http://rinfix.com/cannot-be/tostring-in-java-lang-object-cannot-be-applied-to-char.html How do I make an alien technology feel alien?

nRow = table.NewRow(); nRow["ID"] = SqlInt32.Null; nRow["Description"] = SqlString.Null; table.Rows.Add(nRow); // Initialize variables to use when // extracting the data. more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Can an object *immediately* start moving at a high velocity? My code is below: While objDataReader.Read() 'Set up DataRow object Dim dr As DataRow = DataReaderTable.NewRow With dr dr(0) = objDataReader.GetSqlInt32(0) 'IndividualID dr(1) = objDataReader.GetString(1) 'First Name dr(2) = objDataReader.GetString(2) 'Last

apple 6/17/2010 12:34:44 AM | Thanks for sharing. null : reader.GetString(Col2Index), reader.IsDbNull(Col3Index) ? Homework Help Math 1/30/2010 3:18:02 AM | While reading your blog it seems that you research on this topic very much. Browse other questions tagged c# sql-server null or ask your own question.

The method: public List GetMovieGenrebyMovieID(int movieID) { using (SqlConnection conn = CreateConnection()) { try { SqlCommand cmd = new SqlCommand("dbo.usp_GetMovieGenreByMovieID", conn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@MovieID", movieID); List movieGenre = new List(10); 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) Doesn't the coalescing operator check types? –Nick Larsen♦ Oct 21 '10 at 13:33 1 It works since (object??string) returns object, because coalesce uses the least common type. Reply kanasz.rober...

The System.Data.SqlTypes namespace provides null semantics by implementing the INullable interface. String.Empty).ToString(); or String s = (myObjc ?? "").ToString() to be even more concise. The IsNull function for each SqlType returns a SqlBoolean and can be used to check for null values. to make it correct.