How Do I Capture Minimize, Maximize events.... - C# Discussion Boards

vandread128-Dec-05 6:06

28-Dec-05 6:06

I want to build an icon on the desktop that will load a program that I am working on, which will display a loading page. Any ideas?

Re: icon loading page

Dave Kreskowiak28-Dec-05 6:30

Dave Kreskowiak

28-Dec-05 6:30

Right-Click on the Desktop and click New, then Shortcut?

Or are you asking how to put a splash screen in your app? Just search, under The Code Project banner at the top of every page, the articles for "splash". There are plenty of examples.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Loading Webpage - Wait until page is loaded

Seraphin28-Dec-05 5:56

Seraphin

28-Dec-05 5:56

I am using this code for check webbrowser's activity

while (wbr.ReadyState != WebBrowserReadyState.Complete)<br />
{<br />
    Application.DoEvents();<br />
}

But when I am using

heForm.InvokeMember("submit");

which submits a form on a webpage, ReadyState will not be activated or changed. Also the IsBusy flag doesn't change.

Re: Loading Webpage - Wait until page is loaded

Judah Gabriel Himango28-Dec-05 6:08

Judah Gabriel Himango

28-Dec-05 6:08

I wouldn't do that. Application.DoEvents is terribly inefficient, causes many allocations and can result in unexpected scenarios.

Instead, just listen for the wbr.Navigating event, which will tell you when the browser's busy. I believe there's a DocumentCompleted event to tell you when the document is fully loaded.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Bought a House!
Judah Himango

Re: Loading Webpage - Wait until page is loaded

Seraphin28-Dec-05 6:29

Seraphin

28-Dec-05 6:29

Hi Judah,

thx for reply and this tip.

But additionally this won't work with InvokeMember. After firing this code line the application doesn't recognize browser activity.

Re: Loading Webpage - Wait until page is loaded

peshkunta28-Dec-05 9:28

peshkunta

28-Dec-05 9:28

Not sure if this is what you are looking for. The following example shows some of my code I've used where I have a timer event handler function call this piece of code every second. Without the if statement this would cause problems because the page doesn't always load in the browser at the same speed - it will make the program stop responding. But with the if statement this checks and makes sure the WebBrowser object is not loading anything at the moment and if it is, it doesn't execute the code (doesn't load anything else - until the statement is true):

if (webBrowser1.IsBusy == false && webBrowser1.IsOffline == false)
{
webBrowser1.Url = new Uri(strUrl);
}
Let me know if I can help further.

Re: Loading Webpage - Wait until page is loaded

Seraphin28-Dec-05 15:47

Seraphin

28-Dec-05 15:47

Hi peshkunta,

After InvokeMember (new in .NET Framework 2.0) ->

IsBusy = false
IsOffline = false

that's the problem (tested with your code above as check process)

InvokeMember fire a method of the selected HTML element. I loaded a FORM tag and after submitting it, a new webpage is loaded again.

But if I am in debugging mode and go to the line after InvokeMember I wait a moment and then it works, because the browser don't fire the flag immediately.

How Do I Capture Minimize, Maximize events....

JstDaNuGuy28-Dec-05 5:22

JstDaNuGuy

28-Dec-05 5:22

???
i need to capture these events as i have a statusbar on my app, and when i maximize my app it retains the sizing grip and if u click-grab it moves through out the page...so i need to capture the maximize/minimize events to beable to hide/unhide the sizing grip...unless there is a better option out there...

Big Grin | :-D

Re: How Do I Capture Minimize, Maximize events....

Robert Rohde28-Dec-05 5:37

Robert Rohde

28-Dec-05 5:37

Look here[^]

Re: How Do I Capture Minimize, Maximize events....

JstDaNuGuy28-Dec-05 7:42

JstDaNuGuy

28-Dec-05 7:42

thx
it works beautifully

thx again

Big Grin | :-D

Data Commands OleDb

thepolishguy28-Dec-05 4:11

thepolishguy

28-Dec-05 4:11

I need to allow an administrator to change login passwords for my application but am having problems with the syntax for the UPDATE statement. Specifically, I want to use Data Commands rather than working through a data set to make the updates because I will only need to do two operations with the MS Access database-verifying the old password/user id combo and updating the password to a new one. It seems to me that the UPDATE statement requires paramaters, but I am unsure of the syntax. Any help would be appreciated. Thanks.

Re: Data Commands OleDb

WillemM28-Dec-05 8:46

WillemM

28-Dec-05 8:46

The syntax for the SQL command you will need is easy:

UPDATE [table] SET [field]=[value],[field]=value,.. WHERE [filterexpression]

Replace the [...] for the actual names and values.

For the rest you need a simple piece of code like this:

OleDbConnection connection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=mydb.mdb");
OleDbCommand cmd = new OleDbCommand(query,connection);

try {
  connection.Open();
  cmd.ExecuteNonQuery();
}
catch {
 //Whatever needs to be catched
}
finally {
  connection.Close();
}

Good luck.

WM.

What about weapons of mass-construction?

Re: Data Commands OleDb

kourvoisier28-Dec-05 20:36

kourvoisier

28-Dec-05 20:36

If you were working thru a dataset you would not have to know any SQL statements after populating the dataset.

Using the dataset is simple
1> create and fill the dataset with dataAdapter.
2> create new SQL command builder associated with dataAdapter
3> get new row from DataTable edit row(record) - (user/password)
4> simply update the database thru the adapter

Besides from initially populating the dataset no SQL involved

Adding data from dataGridView to arrayList

Duif28-Dec-05 3:04

Duif

28-Dec-05 3:04

Hi, can someone help me...??

I have data in a Access-database, i add the data to a arrayList and show the data from the arrayList in a dataGridView. All that works perfect.

Now i want to add data to the arrayList (and then to the Access-database).

I want to use the dataGridView, so i clear it by: dataGridView1.Rows.Clear();

Then i would like to add data to the empty rows and press a Save-button to save the data.

I have tried something like this:

foreach (DataGridViewRow gridRow in dataGridView1.Rows)
{
KampListe.Add(new Kamp(Convert.ToString(gridRow["kampnr"]), Convert.ToString(gridRow["Idrætsgren"]), Convert.ToString(gridRow["Turnering"]), Convert.ToString(gridRow["Dato og Tid"])));
}

but it will not work...., what is the problem...???

Helge

Re: Adding data from dataGridView to arrayList

albCode28-Dec-05 3:52

albCode

28-Dec-05 3:52

ArrayList listing = new ArrayList();
int i;

for (i=0;i<=dataGridView1.Rows.Count -1;i++)
{
listing.Add(i.ToString());
}

check this link too

http://blog.kevinsmet.be/PermaLink,guid,22de02a3-2fc8-482a-99f9-c5f293a41c79.aspx

Re: Adding data from dataGridView to arrayList

Duif28-Dec-05 4:15

Duif

28-Dec-05 4:15

Hi again, i can still not solve my problem...

In my dataGridView1 i have 9 coloumns, how do i get each cells value in all 9 coloumns...???

Helge

Re: Adding data from dataGridView to arrayList

albCode28-Dec-05 4:39

albCode

28-Dec-05 4:39

ArrayList listing = new ArrayList();
int i;

for ( i=0;i<=this.dataSet11.Tables[0].Rows.Count - 1;i++)
{
listing.Add(dataSet11.Tables[0].Rows[i]["column1"].ToString()); listing.Add(dataSet11.Tables[0].Rows[i]["column2"].ToString()); listing.Add(dataSet11.Tables[0].Rows[i]["column3"].ToString()); listing.Add(dataSet11.Tables[0].Rows[i]["column4"].ToString());
listing.Add(dataSet11.Tables[0].Rows[i]["column5"].ToString());
listing.Add(dataSet11.Tables[0].Rows[i]["column6"].ToString());
listing.Add(dataSet11.Tables[0].Rows[i]["column7"].ToString());
listing.Add(dataSet11.Tables[0].Rows[i]["column8"].ToString());
listing.Add(dataSet11.Tables[0].Rows[i]["column9"].ToString());

}

i have done this in windows application, but i havtn free time to write in web app but i hope helps as clue...

Events

nunom_c28-Dec-05 3:03

nunom_c

28-Dec-05 3:03

Hello.
How can I fire up a button event without pressing the button?

Thank you

Re: Events

albCode28-Dec-05 3:31

albCode

28-Dec-05 3:31

private void button1_Click(object sender, System.EventArgs e)
{
//Do some code
}

private void timer1_Tick(object sender, System.EventArgs e)
{
this.button1_Click(this,e);
}

ur code which is written in click event of button should execute in everey seconds,minutes,hours,... by timer whithout clicking button

but first set property to true of timer in design view or in form1_load
example :

timer1.enabled=true;

hope helps

Re: Events

VPMahank28-Dec-05 5:24

VPMahank

28-Dec-05 5:24

You can event try calling button1.PerformClick() method.

Thanks,
VPMahank.

How can I create a binary buffer of an image from a file?

thomasa28-Dec-05 2:46

thomasa

28-Dec-05 2:46

Something like

<br />
private byte[] getImageBytes()<br />
{<br />
byte[] buffer = null;<br />
FileStream templateStream = File.Open(@"C:\MyImage.gif", FileMode.Open);<br />
buffer = new byte[templateStream.Length];<br />
templateStream.Write(buffer, 0, (int)templateStream.Length);<br />
templateStream = null;<br />
return buffer;<br />
}<br />

The code runs but I only get a buffer containing zero's

Thanks
Thomas

Re: How can I create a binary buffer of an image from a file?

Judah Gabriel Himango28-Dec-05 4:27

Judah Gabriel Himango

28-Dec-05 4:27

Try flushing the file stream (and also, you MUST dispose the FileStream as well). Setting it to null is pointless; you only need to do that in Java.

private byte[] getImageBytes()
{
   byte[] buffer = new byte[templateStream.Length];
   
   using(FileStream templateStream = File.Open(@"C:\MyImage.gif", FileMode.Open))
   {
      templateStream.Write(buffer, 0, (int)templateStream.Length);
      templateStream.Flush();
   }
   return buffer;
}

Please note that if you're using the latest version of the .NET framework, you can use the File.ReadAllBytes method, which is more efficient and requires only a single line of code:

private byte[] getImageBytes()
{
   return File.ReadAllBytes(@"c:\MyImage.gif");
}

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Bought a House!
Judah Himango

Re: How can I create a binary buffer of an image from a file?

leppie28-Dec-05 6:49

leppie

28-Dec-05 6:49

Judah Himango wrote:
templateStream.Write(buffer, 0, (int)templateStream.Length);

Copy & paste error, and the real problem :p

^{xacc.ide-0.1.1 released! :) Download and screenshots}

Re: How can I create a binary buffer of an image from a file?

Judah Gabriel Himango28-Dec-05 7:09

Judah Gabriel Himango

28-Dec-05 7:09

Heheh, good catch.

Re: How can I create a binary buffer of an image from a file?

S. Senthil Kumar28-Dec-05 19:31

S. Senthil Kumar

28-Dec-05 19:31

Judah Himango wrote:
Setting it to null is pointless; you only need to do that in Java.

OT, but I thought the Java GC also worked the same way as .NET, it's mark and sweep and doesn't require references to be set to null?

Regards
Senthil
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