|
BobJanova wrote: The class resolution is not through the same mechanism if you use reflection,
and it is much slower.
The same mechanism is used to load the assembly and class into the AppDomain regardless of whether reflection or application reference is used.
Class loading is a one time operation so that will not have an impact on any general application.
So best you can be referring to is method invocation. If you use indirect method invocation, every time, then that is proxy mechanism where the proxy mechanism itself has a impact.
Again however you would be hard pressed to measure that with code that actually does anything.
However if you use a direct implementation, such as interface/base class invocation then the call semantics are the same. A class instance in memory is the same regardless of whether the class/assembly was loaded by reflection or via that application loading mechanism.
|
|
|
|
|
Yes. but that depends if you willing to violate the Open/Close principle in the process. It is because you would have to modify the class everytime you wanted to change its implementation. You should use the factory pattern to make the functionality more dynamic. This can either be achieved by way of reflection or being database driven. As for performance with reflection, from tests that I have done. The quickest method of execution is using the DynamicMethod class and generating IL code, and wrapping it in a delegate.
|
|
|
|
|
I think it's obvious that the posted code would be used in a method taking the name as a parameter, not hard coded in a string :P.
|
|
|
|
|
Hi,
If i just cancel the CancellationTokenSource token (that is a parameter of the Task.Factory.StartNew) , does it cancells automatically the task? or i need to check in the code of the task if the IsCancellationRequested of this cancellationToken and stop the task manually there?
|
|
|
|
|
You need code in your Action that checks to see if the IsCancellationRequested property of the token is True.
|
|
|
|
|
winforms sql2008
I have a table
Login(id(int),EmailId(varchar(35),connType(varchar))
where conntype has values like pop3 or imap. consider an user is loggedin. i want to fetch connType value of the logged user to do like this
if(conntypeValue == imap)
{
//code for imap connection
}else
{
//code for pop3 connection
}
how can i do it
modified 22-Jan-12 4:10am.
|
|
|
|
|
What exactly are you trying to do in here?
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
|
|
|
|
|
that code has been done. just i want to retrieve the single value from the table
|
|
|
|
|
What value? What table? You need to provide some more details about your problem.
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
|
|
|
|
|
winforms sql2008
I have a table
Login(id(int),EmailId(varchar(35),connType(varchar))
where conntype has values like pop3 or imap. consider an user is loggedin. i want to fetch connType value of the logged user to do like this
if(conntypeValue == imap)
{
//code for imap connection
}else
{
//code for pop3 connection
}
how can i do it
i want to fetch connType column value from the table login where id = userid
|
|
|
|
|
Brilliant! I asked you to explain your problem in more detail and you have just repeated your original question.
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
|
|
|
|
|
I want to connect with pop3 server or imap server on the basis of the account configured by the user. that account values are in the login table. when the user logged in. i want to fetch the value from the login table column servertype. if that value is pop3 the code of pop3 server connectivity will run.
|
|
|
|
|
Login(id(int),EmailId(varchar(35),connType(varchar))
execute a scalar
select connType from Login where id = 5
or
select connType from EmailId where id = 'noone@example.com'
|
|
|
|
|
mschotamaster wrote: sql2008
I have a table
Aight, first you'd need a Sql-statement to select the value you're interested in. Something like this
SELECT [connType]
FROM [Login]
WHERE [Id] = @Id
mschotamaster wrote: i want to fetch connType value of the logged user to do like this
Open a <a href="http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.aspx">SqlConnection</a>[<a href="http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.aspx" target="_blank" title="New Window">^</a>] (using a correct connectionstring[^]), create a <a href="http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.aspx">SqlCommand</a>[<a href="http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.aspx" target="_blank" title="New Window">^</a>], put the Sql-statement in the CommandText property, add the parameter, open the connection, and catch the result from the ExecuteScalar[^]-method.
Bastard Programmer from Hell 
|
|
|
|
|
|
My pleasure 
|
|
|
|
|
if the user is logged in as you say, you must already have read the table to identify him, so you already know how to obtain data from a table.
|
|
|
|
|
That's what I thought also.
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
|
|
|
|
|
hi
I have on the form a datagrid that user information is entered as a factor. Now I want to print the invoice. It is this good? Is how do I do?
|
|
|
|
|
Your question made no sense at all as written. You haven't given any coherent details about what you've done, how you've done it or what your code is supposed to do beside print an invoice.
|
|
|
|
|
http://www.stimulsoft.com/ReportsNet.aspx
|
|
|
|
|
I developed an application in C # where I have 4 text boxes and a datagrid with 4 columns and multiple rows and a button.
The button should generate an xml file.
I can create the xml file and write the data from text boxes, but not the DataGrid.
Anyone can help me?
At this moment i have this code:
In the button action
XmlTextWriter writer = new XmlTextWriter("teste.xml", Encoding.GetEncoding("ISO-8859-1"));
Writer.Formatting = Formatting.Indented;
// for the textboxes:
WriteStartElement("textbox1");
WriteElementString(textbox1.text);
WriteEndElement();
WriteStartElement("textbox2");
WriteElementString(textbox2.text);
WriteEndElement();
WriteStartElement("textbox3");
WriteElementString(textbox3.text);
WriteEndElement();
WriteStartElement("textbox4");
WriteElementString(textbox4.text);
WriteEndElement();
WriteStartElement("textbox4");
WriteElementString(textbox4.text);
WriteEndElement();
For the datadridview xml output strutured shoud be like this:
<Tabela>
<Tabela-Linha numero="1">
<Id>01</id>
<Nome>Teste1</Nome>
<Cargo>xxx</Cargo>
<Extensao>500</Extensao>
</Tabela-Linha>
<Tabela-Linha numero="2">
<Id>02</id>
<Nome>teste2</Nome>
<Cargo>xxxx</Cargo>
<Extensao>501</Extensao>
</Tabela-Linha>
</Tabela>
Can anyone help me?
|
|
|
|
|
How about foreaching the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rows.aspx">Rows</a>[<a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rows.aspx" target="_blank" title="New Window">^</a>] collection of the grid, writing the contents of all the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.columns.aspx">Columns</a>[<a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.columns.aspx" target="_blank" title="New Window">^</a>] using the method you already used?
object value = dataGridView1.Rows[RowIndex].Cells[ColumnIndex].Value;
Bastard Programmer from Hell 
|
|
|
|
|
How about using a serializable object as the datasource for the grid then serialize the object?
|
|
|
|
|
Does .NET Framework 4.0 have every thing in it that .NET Framework 2.0 has. If I have a program that worked on .Net Framework 2.0 will it necessarily work on .Net Framework 4.0.
Regards,
Michael
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
