default-value

This question already has an answer here: Setting the default value of a C# Optional Parameter 3 answers How does one define a function that takes an optional array with an empty array as default? public void DoSomething(int index, ushort[] array = new ushort[] {}, bool thirdParam = true) results in: Default parameter value for 'array' must be a compile-time constant. You can't create compile-time constants of object references. The only valid compile-time constant you can use is null , so change your code to this: public void DoSomething(int index, ushort[] array = null, bool thirdParam =

I want to change default text on button that is " Choose File " when we use input="file" . How can I do this? Also as you can see in image button is on left side of text. How can I put it on right side of text? Shiv Kumar Each browser has it's own rendition of the control and as such you can't change either the text or the orientation of the control. There are some "kind of" hacks you may want to try if you want an html / css solution rather than a Flash or silverlight solution. http://www.quirksmode.org/dom/inputfile.html http://www.shauninman.com/archive/2007/09/10/styling_file_inputs_with

I know that instantiated arrays of value types in C# are automatically populated with the default value of the type (e.g. false for bool, 0 for int, etc.). Is there a way to auto-populate an array with a seed value that's not the default? Either on creation or a built-in method afterwards (like Java's Arrays.fill() )? Say I wanted an boolean array that was true by default, instead of false. Is there a built-in way to do this, or do you just have to iterate through the array with a for loop? // Example pseudo-code: bool[] abValues = new[1000000]; Array.Populate(abValues, true); // Currently how

This isn't working in SQL Server 2008: ALTER TABLE Employee ALTER COLUMN CityBorn SET DEFAULT 'SANDNES' The error is: Incorrect syntax near the keyword 'SET'. What am I doing wrong? This will work in SQL Server: ALTER TABLE Employee ADD CONSTRAINT DF_SomeName DEFAULT N'SANDNES' FOR CityBorn; ALTER TABLE Employee ADD DEFAULT 'SANDNES' FOR CityBorn cannot use alter column for that, use add instead ALTER TABLE Employee ADD DEFAULT('SANDNES') FOR CityBorn user3310402 The correct way to do this is as follows: Run the command: sp_help [table name] Copy the name of the CONSTRAINT . Drop the DEFAULT

Is it possible to give a default value to a parameter of a function while we are passing the parameter by reference. in C++ For example, when I try to declare a function like: virtual const ULONG Write(ULONG &State = 0, bool sequence = true); When I do this it gives an error: error C2440: 'default argument' : cannot convert from 'const int' to 'unsigned long &' A reference that is not to 'const' cannot be bound to a non-lvalue You can do it for a const reference, but not for a non-const one. This is because C++ does not allow a temporary (the default value in this case) to be bound to non