old value after validating event of datetimepicker - C# Discussion Boards

Re: Determining valid moves for a chess game

Luc Pattyn28-Jul-08 5:25

28-Jul-08 5:25

Hi Guy,

that is all pretty nice, but computer chess is about performance. You simply cannot afford to waste
cycles on calling virtual methods and the like if the strength of your computer game is all that
matters. You really have to make the best use of the number of CPU cycles you are allowed.

So OOP is fine for the GUI part of a chess game, but not for the chess engine itself.
That is assuming the end goal is a chess playing program; for pure validation and visualization,
every approach is fine, and then of course OOP is recommended.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Voting for dummies? No thanks. Dead | X|

Re: Determining valid moves for a chess game

GuyThiebaut28-Jul-08 5:43

GuyThiebaut

28-Jul-08 5:43

Thanks - I appreciate that as I sometimes forget that the object interface provided is not necessarily the fastest or most efficent way to do things.

Coming from a very heavily procedural background, and having been seduced by OOP, I can sometimes assume that OOP will solve everything.

Smile | :)

Continuous effort - not strength or intelligence - is the key to unlocking our potential.(Winston Churchill)

Type comparison syntax

Mycroft Holmes28-Jul-08 2:58

Mycroft Holmes

28-Jul-08 2:58

I have a variable passed into a method as an object. The object type is SQLDBType, I need to test the variable to find out what type it is, not the SQLDBType but the underlying eg varchar datetime (specifically I want to test wether the variable id datetime. Can someone please supply the syntax to find out if the dbtype is datetime

I am currently using the string comparison to "DateTime". However I then want to test the value of the datetime content (checking for #12:00:00# = no date) and falling in a hole.

public SQLParameter CreateParameter(string sParameterName, SqlDbType oDataType,
    object oValue, int iLenght, ParameterDirection oDirection)
{
    SQLParameter oParam = new SQLParameter();
    oParam.ParameterName = sParameterName;
    oParam.Length = iLenght;
    if (oDataType.ToString() == "DateTime") //Testing against a string, how bloody awful
    {
        if (oValue == DBNull.Value)
        { oParam.Value = oValue; }
        else
        {
            oDT = DateTime.Parse(oValue.ToString);//Fails to compile I want to test the value

Never underestimate the power of human stupidity
RAH

Re: Type comparison syntax

Gareth H28-Jul-08 3:03

Gareth H

28-Jul-08 3:03

SqlDbType is an enum. So you can do:

if (oDataType == SqlDbType.DateTime)
{
 //somet
}

Regards,
Gareth.

(FKA gareth111)

Re: Type comparison syntax

Mycroft Holmes28-Jul-08 4:13

Mycroft Holmes

28-Jul-08 4:13

AAaahhh - I hate it when it is the simple answer and I have spent the day looking for a complex one. Thanks.

Now how to test whether the value of an object variable is the min date (presumable #12:00;00#)

Never underestimate the power of human stupidity
RAH

Scrapping a Datastore

logicon28-Jul-08 2:54

logicon

28-Jul-08 2:54

Hi All,

I am trying to scrape data from a site.

I have created a Window Form Application with Web Browser control and accessing its form element using like:

HtmlElement heleDay = wbPage.Document.GetElementById("cboDate_Day");

Now this application is working file but its really slow as entire page is to be loaded visually then I can do anything (parsing).

Then I realised that using HTTPWebRequest or WebClient I can do this in faster way. I have tried every thing but its not working.

Actual Page posts for like this:

document.frmStatus.action = "getstatus.asp"
document.frmStatus.submit()

and on this form there is one text box, 3 combo (for date) and one submit button.

Regards
Kumar

Re: Scrapping a Datastore

logicon28-Jul-08 3:26

logicon

28-Jul-08 3:26

I guess my question is clear? or Posted at correct place?

old value after validating event of datetimepicker

tabstop28-Jul-08 2:25

tabstop

28-Jul-08 2:25

I have a problem with the validating event of the datimepicker-control. I use this event to check the correct value of the date i.e. the inputed date shouldn't be in the past. Normally it works fine, but if you manually change the date via keyboard and leaving the control pressing the TAB key, the property 'Value' of the datetimepickers holds the old value. But this only happens, if you i.e. change the month from '01' to '2'. Changing the month from '01' to '02' is working correctly.

Any ideas why this is happening and how to resolve it?

Re: old value after validating event of datetimepicker

Kjetil Svendsen28-Jul-08 5:30

Kjetil Svendsen

28-Jul-08 5:30

Hi.

Try using the dateTimePicker_ValueChanged event

Kjetil

Re: old value after validating event of datetimepicker

tabstop28-Jul-08 20:49

tabstop

28-Jul-08 20:49

Yes, i can use this event. But in this method there's not possibility to cancel it (see e.cancel = true) and force the user to change the value.

update xml file

arkiboys28-Jul-08 2:14

arkiboys

28-Jul-08 2:14

Hi,
Using the xmlWriterSetting and xmlreaderSettings, I am saving and reading xml files...
So if a new xml data needs to be added to the xml file, I use the xmlWriterSetting to save into the xml file.

Questions:
1)
How is it possible to enhance what I have so that I can UPDATE an xml file?
2)
Do I have to use xmlDocument?
3)
Can I update using the xmlWriterSetting?

Thanks

Re: update xml file

teejayem28-Jul-08 2:39

teejayem

28-Jul-08 2:39

What i would use is Xml Serialization[^].

Don't be overcome by evil, but overcome evil with good

Deploying multiple projects

jamesjk28-Jul-08 1:04

jamesjk

28-Jul-08 1:04

Hi,

I am deploying 5 projects in a single msi file.
I need to add a form so that at the time of installation the user can make a custom installation of the products (like we do while installing MS Office)..

How can I achieve this....?

THANKS in advance for any suggestions....

Re: Deploying multiple projects

Thomas Stockwell28-Jul-08 1:33

Thomas Stockwell

28-Jul-08 1:33

The only way that I can think of is to write yet another program that should be started when the user clicks on it. That new application would then start the selected installer with the Process.Start() method.

Regards,
Thomas Stockwell

Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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Re: Deploying multiple projects

jamesjk28-Jul-08 1:54

jamesjk

28-Jul-08 1:54

Thanks Mr.Thomas for the suggestion...

But I think there should be some other better option to do this...

Re: Deploying multiple projects

Thomas Stockwell28-Jul-08 2:03

Thomas Stockwell

28-Jul-08 2:03

That is the only option that I can think of with the out-of-the-box visual studio. The only other option that I can think of is to buy a third party installer creation suite.

openFileDialog win form

arkiboys28-Jul-08 0:59

arkiboys

28-Jul-08 0:59

Hello,
The following code shows how to use the openFileDialog to read the contents of a .csv file into a textbox.

Question:
After selecting the file iin the dialog, how do I actually open the file?
remember that I would like to open the .csv file and NOT read it into the textbox.

StreamReader ts = null;

openFileDialog1.CheckFileExists = true;
openFileDialog1.CheckPathExists = true;
openFileDialog1.DefaultExt = "csv";

openFileDialog1.Filter = "Text files (*.csv)|*.csv|" + "All files|*.*";
openFileDialog1.Multiselect = false;
openFileDialog1.FilterIndex = 2;
openFileDialog1.ValidateNames = true;

if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
ts = new StreamReader(openFileDialog1.OpenFile());

txtSQL.Text = ts.ReadToEnd();
}
}

Thanks

Re: openFileDialog win form

stancrm28-Jul-08 1:05

stancrm

28-Jul-08 1:05

change openFileDialog1.OpenFile() to openFileDialog1.Filename

Re: openFileDialog win form

arkiboys28-Jul-08 1:17

arkiboys

28-Jul-08 1:17

Hi,
As I mentioned in the first post, please note that I would like to actually open the file rather than reading it into the textbox.
Like as if you double click the file and the .csv file opens.
Thanks

Re: openFileDialog win form

sumit703428-Jul-08 1:33

sumit7034

28-Jul-08 1:33

try

Process.Start(filename)

Re: openFileDialog win form

arkiboys28-Jul-08 1:58

arkiboys

28-Jul-08 1:58

Thanks

Re: openFileDialog win form

sumit703428-Jul-08 2:20

sumit7034

28-Jul-08 2:20

you r welcome

Re: openFileDialog win form

Thomas Stockwell28-Jul-08 1:35

Thomas Stockwell

28-Jul-08 1:35

What the other person suggested is what you are trying to get to. By creating a new stream you are opening the file (or as close as you can get to it in C#). You can then manipulate what the stream returns before you put it into the textbox.

How to draw a status bar panel ?

reallyneedhelp28-Jul-08 0:48

reallyneedhelp

28-Jul-08 0:48

I would like to ask how to draw a status bar panel. Is there any event that supports us ? Thnk in advance

Re: How to draw a status bar panel ?

Harvey Saayman28-Jul-08 0:55

Harvey Saayman

28-Jul-08 0:55

reallyneedhelp wrote:
status bar pane

define status bar panel...

if you want to draw custom stuff on a control such as the panel youd use its OnPaint event handler like so

OnPaint(object sender, EventArgs e)
{
    // This will draw a line from the 1st point(x = 50, y = 50), to the 2nd point(x = 100, y = 100) 
    e.Graphics.DrawLine(new Point(50, 50),new Point(100, 100));
}

look around in the graphics object to see what else you can draw

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)

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