If I have 2 methods of the same name, each taking one parameter. The first takes the parameter by value and the second by reference. When invoking the method how do I specify which version I want to use?
Given
public class foobar{
...
public foo(int a){}
public foo(ref int a){}
}
how do I...
The concept of ValueType vs Reference Type is understood along with the relation to Stack vs Heap but I have a question
int - a value type, stored on the Stack
int - inherits from System.ValueType which in turn is derived from System.Object
So why is int not considered an object and placed on...
SELECT CONVERT(BIGINT, (1000000000+9999999999)*RAND()) as NewPIN
WHERE NewPIN NOT IN (SELECT PIN FROM CustomerPins)
Invalid column name 'NewPIN'
How can I take the product of this aggregate query and then use it to do a lookup on another table?
I have 2 controls inside a form
<asp:DropDownList id="MyDDL" runat="server" OnSelectedIndexChanged="DoStuff()">
and
<asp:treeview id="MyTree" runat="server" />
So changing my dropdownlist value OR click on a node in my tree can submit my form.
I have a line in my Page_Load() that accesses...
I'm trying to capture the following
'The digit 0 followed by 1-3 occurences of any digit and then a hyphen character followed by 5-7 occurences of any digit
So like 025-23456, 057-3456789, 086-458953 etc
Dim MyRegEx As New Regex("/^0\[0-9]{1,3}-\[0-9]{5,7}/")
Does not seem to be...
I have a table of CartItems, with the ProductID bought and then an Extra field which is true or false. I want to see a grouping of a count of each ProductID but within that count I want to know the count of ProductIDs with extras.
create table test(CartItemID int, ProductID int, Extra int)...
I have a table of CartItems, with the ProductID bought and then an Extra field which is true or false. I want to see a grouping of a count of each ProductID but within that count I want to know the count of ProductIDs with extras.
So given
create table test(CartItemID int, ProductID int...
I need a countdown timer from 3 minutes to that has 2 events.
1] When timer reaches 0, Event1 fired "Time Up" message
2] A specific user action, Event 2 fired, timer reset to 3 minutes.
The problem I have is how to display the clock to the user but yet have the application retain control. I...
Is it possible to have an object available to all pages in a given solution? For example if I wanted to store a Database Object and make it available to all pages in my solution but the datasource of that object depended on a selection made by the user, how would I achieve that without passing...
Dim rx As New Regex("/^0\d{1,3)-\d{5,7}/")
If(Not(rx.IsMatch("01-12345")))Then
' Why is this executed?
End if
Can anyone tell me why the pattern above does not match the string?
Can I get some help with a regular expression? I'm trying to express the following for a string
Up to 4 digits, but the first digit must be a 0 followed by a hyphen followed by up to 7 digits. So the following are examples of valid strings
02-456
0546-456789
Thanks
When finishing off writing an XML file with XMLTextWriter at the point where you use WriteEndDocument, how can I add a vbCrLf to the end of this document?
As in XMLTextWriter writes
<a>
<b></b>
</a> <----- I want to add a carriage return after this line but using XMLTextWriter's...
I want to have 2 types of table styling
- A coloured table border on the outside of the table only
- A coloured table border outside and also on tds
So basically a square box vs a grid, this works in FF but not in IE, can anyone help me colour the tds in the grid in IE?
<!DOCTYPE html...
Usually I just bind a dataset to a datagrid but this time I want to have a great deal of flexibility as depending on some conditions each row that I display will look different.
So I want to be able to loop through a datasets' results and output a row dynamically rather than just binding all...
I have a lot of SQL INSERT statements that have been generated dynamically in code. I want to pass this string of generated queries to a stored procedure to run them, BUT within a transaction. Can this be done?? So something like
-- Create the table
CREATE TABLE tblA(a int auto_increment...
I have some sql statements that I am preparing in code which I pass to a stored procedure to execute via the prepare statement but I keep getting an error, how can I get around this?
create table tblA(a int auto_increment primary key, b int)
CREATE PROCEDURE `foobar`(IN sSQL varchar(1000))...
Table definition
tblFoo
x varchar
tblFoo
------
x
------
abc
def
ghi
I have a string like 'abc,def,ghi,jkl'
and I want to say return for me everything in
this string that is not in tblFoo. So basically
the reverse of:
SELECT *
FROM tblFOO
WHERE x NOT IN ('abc,def,ghi,jkl');
Ultimately I...
I have some code that goes
Dim DRDataTable As DataTable
Try
FunctionThatReturnsADataset(MyDataSet)
DRDataTable = MyDataSet.Tables(0)
' Processing ...
Catch ex As MyCustomException
End Try
Public Class MyCustomException
Inherits System.Exception
Public Sub New(ByVal Message...
How do I find the complete execution path of the following code structure?
Class MyClass
DBConnect()
Function DBConnect()
Try
MyDatabase.Connect()
Catch ex as MyCustomException
SendErrorEmail(MyDatabase.DBError())
End Try
End Function
Function SendErrorEmail(ByVal AppException as...
I want to add a record to tblA and insert the identity field generated into tblB. If there are 2 successful INSERTs then I'd like a true/false boolean returned. How do I do this in mysql with a stored procedure, in/out parameters and transactions?
tblA
A int auto_increment primary key NOT NULL...
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