C# Discussion Boards - CodeProject

Re: using lparam parameter of SendMessage function

Sandeep Kalra14-Oct-08 0:52

14-Oct-08 0:52

Hi

Thats the Internet Explorer to which I am sending F1 key.It responds to F1 key if i press it on keyboard.
Is it really the case that IE donot responds to WM_KEYUP or WM_KEYDOWN events.I have tried for WM_CLOSE and for quit too but it did not worked.
I am trying to find.

THE SK
(Sandeep Kalra)
"I am the One"

Re: using lparam parameter of SendMessage function

Simon P Stevens14-Oct-08 2:47

Simon P Stevens

14-Oct-08 2:47

Sandeep Kalra wrote:
I have tried for WM_CLOSE and for quit too but it did not worked

Then like I said. You are doing something wrong.

Simon

Re: using lparam parameter of SendMessage function

Mark Salsbery14-Oct-08 4:42

Mark Salsbery

14-Oct-08 4:42

How do you know you're sending the messages to the right window?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: using lparam parameter of SendMessage function

Sandeep Kalra14-Oct-08 18:23

Sandeep Kalra

14-Oct-08 18:23

I have the handle of that window to which i wanted to send the message.

I have also found that the PostMessage API which has same parameters as that of SendMessage ,is working fine.

Declared this above in code

[DllImport("user32.dll",EnteryPoint="PostMessage"]
public static extern bool PostMessage(int hwnd,int msg,int wparam,int lparam)

[DllImport("user32.dll",EnteryPoint="SendMessage"]
public static extern int SendMessage(int hwnd,int msg,int wparam,int lparam)

I am transferribg same parameters to the PostMessage and SendMessage by declaring them public ,on two different button_click event on my form

Button with a PostMessage is working fine.But button_click with SendMessage is not working at all.I am not getting any warning, error or runtime errror.

Also found that WM_KILLFOCUS,WM_QUIT are not working on PostMessage.However WM_CLOSE ,WM_KEYDOWN,WM_KEYUP worked fine.

I do not know whats wrong(sure not coding).Please suggest.

And I also want to know whic among SendMessage and PostMessage is more reliable

Re: using lparam parameter of SendMessage function [modified]

#realJSOP13-Oct-08 23:49

#realJSOP

13-Oct-08 23:49

To make a lParam integer, try this:

public int MakeLParam(int loWord, int hiWord)
{
    return ((hiWord << 16) + loWord);
}
public int MakeWParam(int loWord, int hiWord)
{
    return ((hiWord << 16) + loWord);
}

Now, all you have to do is construct the two parts of the lParam value, and pass them into one of those functions.

You may also want to look at this page:

http://www.pinvoke.net/default.aspx/user32/SendInput.html[^]

As usual, a little googling would have saved you *and us* HOURS of time.

[EDIT] and the univoter strikes again. I provide an answer and get 1'd. How f***ing pathetic.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

modified on Tuesday, October 14, 2008 7:06 AM

Ajax modal pop extender query

dsaikrishna13-Oct-08 22:18

dsaikrishna

13-Oct-08 22:18

hi to all,

I m facing a problem with Ajax modalpopupextender.
I'am passing a parameter to the model popup, which gets displayed on the popup,
For the next parameter, the popup is not refreshed, still the previous parameter is
shown on the popup.

Thanks & Regards,

sai krishna

Invalid character while using xmldocument.load?

.NetRams13-Oct-08 20:32

.NetRams

13-Oct-08 20:32

Hi,
I am having spanish characters as memorystream, when i give this stream to xmldocument.load - it gives me Invalid characters errro. How to solver this isssue.

Be simple and Be sample.

Re: Invalid character while using xmldocument.load?

Guffa13-Oct-08 20:34

Guffa

13-Oct-08 20:34

Which encoding do you use for the characters, and what encoding is specified in the xml header?

Despite everything, the person most likely to be fooling you next is yourself.

Re: Invalid character while using xmldocument.load?

Brij13-Oct-08 22:56

Brij

13-Oct-08 22:56

check encoding and update it accordingly.

Cheers!!
Brij

Re: Invalid character while using xmldocument.load?

Jakob Olsen14-Oct-08 0:58

Jakob Olsen

14-Oct-08 0:58

Make sure the encoding is the same. You should probably use UTF-8

ASCII tables, HTML entities, types, string formats and more info for the serious coder at: www.codecharts.com

Re: Invalid character while using xmldocument.load?

Guffa14-Oct-08 2:51

Guffa

14-Oct-08 2:51

Ok, three people so far have suggested that it's the encoding that is the problem.

Anyone else why want to suggest that it's the encoding that is the problem before we close?

Wink | ;)

Despite everything, the person most likely to be fooling you next is yourself.

Re: Invalid character while using xmldocument.load?

Mark Salsbery14-Oct-08 4:46

Mark Salsbery

14-Oct-08 4:46

Guffa wrote:
Anyone else why want to suggest that it's the encoding that is the problem before we close?

Not me.

I'm thinking there's characters in the stream that are invalid for the encoding of the XML.

Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Help in WMI

lal001213-Oct-08 20:20

lal0012

13-Oct-08 20:20

Hai
I am developing an application in C#.NET to control processes in remote machine I successfully started a process in remote machine but it is not visible ,it is visible only in task manager.Please help to make it visible

Sree

Re: Help in WMI

Uros Calakovic14-Oct-08 4:38

Uros Calakovic

14-Oct-08 4:38

lal0012 wrote:
Please help to make it visible

Sometimes it's just not possible.[^]

In January you said "Money in April" -
That was two years ago!

B. Python

XML as DataBase

E_Gold13-Oct-08 19:58

E_Gold

13-Oct-08 19:58

hi evreyone
is it possible to use xml file as database ?
if yes, is someone has any sample code in C# that can do Insert,Update and Delete job's ?

thank's alot for any help

Re: XML as DataBase

bcozican13-Oct-08 20:10

bcozican

13-Oct-08 20:10

Yes you can. But it doesnt mean you should. Performance wise its even a worse idea.

To do insert/update/delete you will need to load the xml document, find the node that you want as parent (for insert) or the node you want to update/delete, perform the action you need to do and then save the document again.
Loading the document once and keeping it in memory will speed up the process if its small amounts of data, else you'll find yourself running out of memory soon.

Hope this helps.

Re: XML as DataBase

E_Gold13-Oct-08 20:33

E_Gold

13-Oct-08 20:33

thank's for the quick anser
by database is very very small and i think,
that it will be better to use xml insted access or sql server

can i get any sample ?

Re: XML as DataBase

bcozican13-Oct-08 20:56

bcozican

13-Oct-08 20:56

As Guffa has said, its easy to load the data in a datatable and then save it as xml. That will increase query performance. That will however increase your xml document size.

If you dont want to use that way, heres a really simplified example of an update to a xml file:

<?xml version="1.0"?>
<Employees>
<Employee>
<ID>1</ID>
<FirstName>John</FirstName>
<LastName>Doe</LastName>
</Employee>
<Employee>
<ID>2</ID>
<FirstName>Peter</FirstName>
<LastName>Pan</LastName>
</Employee>
</Employees>

string xmlFilePath = @"C:\Employees.xml";
int EmployeeIdToUpdate = 2;
string NewEmployeeLastName = "Panne";
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.Load(xmlFilePath);

System.Xml.XmlNode eNode = doc.SelectSingleNode("Employees");
for (int i = 0; i < eNode.ChildNodes.Count; i++)
{
System.Xml.XmlNode employeeNode = eNode.ChildNodes[i];

int ID = int.Parse(employeeNode.SelectSingleNode("ID").InnerText);
if (ID == EmployeeIdToUpdate)
{
//Perform action
employeeNode.SelectSingleNode("LastName").InnerText = NewEmployeeLastName;
}
}
doc.Save(xmlFilePath);

Hope this helps.

Re: XML as DataBase

Guffa13-Oct-08 20:38

Guffa

13-Oct-08 20:38

You can save and load a DataTable as xml. Load the DataTable, change the DataRow items, and then save it.

Despite everything, the person most likely to be fooling you next is yourself.

Re: XML as DataBase

E_Gold13-Oct-08 22:15

E_Gold

13-Oct-08 22:15

good.....
can i get code sample ?

Re: XML as DataBase

Guffa13-Oct-08 22:45

Guffa

13-Oct-08 22:45

Look at the examples:
MSDN Library: DataTable.ReadXml[^]

Despite everything, the person most likely to be fooling you next is yourself.

Re: XML as DataBase

N a v a n e e t h13-Oct-08 20:41

N a v a n e e t h

13-Oct-08 20:41

.NET has many XML manipulation classes available. Use any of them to load and save data to XML file. If you are looking for file system based database, consider SQL lite[^]

Navaneeth

How to use google | Ask smart questions

Show Control out of the Window

softwarejaeger13-Oct-08 19:44

softwarejaeger

13-Oct-08 19:44

Hello,

i want/need to create my own contextual menus, but i don't know how i can show them outside of the window. You know contextual menus, which couldn't be shown in the area of the form must be shown at a part outside of the window, so how to do that?

-> Here's an example what i mean (found in google)
http://www.mediacollege.com/computer/file/batch-rename/images/win-exp-original.gif[^]

Thanks

Re: Show Control out of the Window

leppie13-Oct-08 22:17

leppie

13-Oct-08 22:17

Just use a borderless form.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 beta 1 - coming soon
((lambda (x) `((lambda (x) ,x) ',x)) '`((lambda (x) ,x) ',x))

Re: Show Control out of the Window [modified]

softwarejaeger14-Oct-08 2:32

softwarejaeger

14-Oct-08 2:32

OK... but how do i find out, WHERE the Window should have its location?
And... "close" the form... how works that? Because, if it's a DialogForm i can't close it by clicking somewhere else!

modified on Tuesday, October 14, 2008 8:38 AM

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.