Home PHP C# C++ Android Java Javascript Python IOS SQL HTML Categories

Why does .Net Framework base types do not contain implementations of IConvertible methods?

Take a closer look at the documentation - Int32 implements IConvertible explicitly.

When a class/struct implements an interface explicitly, you have to cast instances of that type to its interface before calling those methods

var asConvertable = (IConvertible) 3;
var someByte = asConvertible.ToByte();

Categories : C#

Related to : Why does .Net Framework base types do not contain implementations of IConvertible methods?
Unable to cast object of type DataTable to type System.IConvertible
In your method you are returning datatable and then you try to convert it to int. You just can't do that. If your adapter fills data table with only one value(scalar) you can go with something like this return (int)dataTable.Rows[0][0];

Categories : C#
What is the Big Oh of these two implementations of the same algorithm?
Is it correct that the Big Oh of the first implementation is O(n), and the Big Oh of the second implementation is O(n^2)? Yes. Hash operations are considered to have constant cost. I guess the trade-offs are that the first one uses additional storage space, whereas the second implementation doesn't use additional storage (i.e. is in-place)? Yes. You should also note that the constant v

Categories : Algorithm
Exact same code repeated multiple times for different data types; Any way to make one function that can handle all possible types?
Use an interface: public interface IPageData{ object LeftContent{get;} //Use the correct return type rather than 'object' here } Then when you declare your page types make sure you implement the interface: public class StandardPage:IPageData { ... } public class DoctorPage:IPageData{ ... } Then you can deserialise into a common object: IPageData pageData; switch(smartFormId) {

Categories : C#
LINQ to entity Error: "Unable to create a null constant value of type ''System.Int32[]". Only entity types, enumeration types
It sounds like one of your Int32[] types is null. Try adding a check for that before accessing the .Contains methods: var subjLocal = customerContext.RosterSummaryData_Subject_Local.Where(s => (s.fkRosterSetID == 0) && (statsInfo.TestInstanceIDsList != null && statsInfo.TestInstanceIDsList.Contains(s.fkTestInstanceID)) && (s.fkTestTypeID == statsInf

Categories : C#
CocoaPods How to add a custom Subclass of a Framework in a Podfile to a CocoaPods framework
You definitely don't want to be creating subclasses where your CocoaPods are because it could lead to problems when you're installing/updating the pods. Keep the subclass in your own project (after all, it is your own file, not theirs).

Categories : IOS
Recently Add
How to find current index of your list / array in a changing list?
Comparing a null terminated string to a non-null terminated string
How to find out if something will collide with something in Unity (2D)
How do I populate a listbox based on a selected item from another listbox?
C# FOREACH on multiple LIST<> types
How can i match inner expression on nested expression with regular expressions?
How to connect from client using CCDT and SSL to Remote Queue Manager (WebSphere MQ Server) using C#
How to write Firefox plugin with C# and mono?
Shake Gestures Windows Phone
Thread.Sleep and Painting UI
What is the purpose of TabPage.Hide()
Using Dictionary to count the number of appearances c# create a new page and refresh routing map
Don't know where is database that was created using Entity Framework
Want to understand async
How to open excel file's read only mode on C#?
How to programmatically set App Pool Identity
using .NET TimeZoneInfo Pacific Standard Time (PST) versus Pacific Daylight Time (PDT)
Why can't I assign null to an Object in C#?
GroupLevelIndicatorPane causes ColumnStretchMode=ALL to not fit columns
Cascading Multiple Inheritance and Events
Mutator makes program run indefinitely
How to generate excel like report in WPF?
How to check if user clicked on an image in web browser control
WCF Service with entity framework error with more than table
Why am I not getting the text from my file with this code?
Accessing TFS Work Item Properties "Blocked" & "Root Cause" using TFS API
How to pass values to a user control in winforms c#
How to determine the type of Group from an ldap path
What files am I missing wile running migrations from a console app?
© Copyright 2017 Publishing Limited. All rights reserved.