Re: Show MDI child as not maximized - C# Discussion Boards

Re: Is number a power of 2

Pete O'Hanlon14-Dec-07 1:00

Pete O'Hanlon

14-Dec-07 1:00

An alternative approach could be:

private static bool IsPowerOf2(double number)
{
    double value = Math.Log(number, 2);
    return value == Convert.ToDouble(Convert.ToInt32(value));
}

Deja View - the feeling that you've seen this post before.

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CheckBox selection in DataGridView..

sribachana13-Dec-07 9:29

sribachana

13-Dec-07 9:29

Hi,
i have added one checkbox to my datagridview..
i want to select the checkbox....
after selecting the check box i need to get the whole row details of that perticular checked row..

DataGridViewCheckBoxColumn ckb = new DataGridViewCheckBoxColumn();
ckb.Name = "Checkbox";
ckb.HeaderText = "Select";
dataGridView1.Columns.Insert(0, ckb);

how do i select and deselect the checkbox check options...

please reply me ASAP

Re: CheckBox selection in DataGridView..

Pankaj - Joshi13-Dec-07 18:12

Pankaj - Joshi

13-Dec-07 18:12

<br />
 for (int cnt = 0; cnt <= DataGridView1.Rows.Count - 1; cnt++)<br />
{<br />
DataGridView.Rows[cnt].Cells["ColSelect"].Value = true;<br />
}<br />

1. Where ColSelect is your column name.
2. If you want to de-select just write false instead of true.
3. And if you want to know which row is checked and which is not then

<br />
for (int index = DataGridView1.Rows.Count - 1; index >= 0; index--)<br />
{<br />
if (Convert.ToBoolean(DataGridView1.Rows[index].Cells[0].Value))<br />
{<br />
"Selected"<br />
}<br />
else<br />
{<br />
"Not Selected"<br />
}<br />
} //End of the for <br />
<br />
:-D <br />
<br />

Regards
Pankaj Joshi

If you want to shape your dreams into reality, please wake-up...

Event Handler in a control

Stephen McAllister13-Dec-07 9:18

Stephen McAllister

13-Dec-07 9:18

Hi,

I am writing my first control and would like to create an event so the form the control is sitting on can pick up user activity in the control.

How can I do this?

Thanks in advance.

Stephen

Re: Event Handler in a control

Dave Kreskowiak14-Dec-07 4:04

Dave Kreskowiak

14-Dec-07 4:04

This article[^] has a pretty good explanation, with examples.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Show MDI child as not maximized

eggsovereasy13-Dec-07 8:55

eggsovereasy

13-Dec-07 8:55

I have a MDI container, inside of it I have a child form that is maximized. If I have a second form created and displayed by the first form that is maximized (with its MdiParent property set properly) the second form will also be maximized. Is there anyway to override this behavior? I know I can use ShowDialog, but I don't want it to be a dialog I want it to be a normal, nonmaximized window. The property on the form is set to Normal and I event do a WindowState = FormWindowState.Normal in the constructor, but it still comes as maximized.

Any suggestions?

Re: Show MDI child as not maximized

Dave Kreskowiak13-Dec-07 9:51

Dave Kreskowiak

13-Dec-07 9:51

eggsovereasy wrote:
Is there anyway to override this behavior?

No. All the MDI child forms are treated the same. If one is maximized, they all are. If one is "normal", they all are.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: Show MDI child as not maximized

eggsovereasy13-Dec-07 10:20

eggsovereasy

13-Dec-07 10:20

Disappointing Frown | :(

Thank you for the reply though, I guess I will try and make something work with ShowDialog().

Ways to re-establish connection between client and server on remoting?

kumar.bs13-Dec-07 8:00

kumar.bs

13-Dec-07 8:00

My scenario is:

Based on Remoting concept, Server is listening to client on particular port using TCPChannel. Suddenly Server (Listner) went off, which client does not have information. When client sends a message, error is thrown saying "No connection could be made because the target machine actively refused it".

Is there any way to re-establish client - server connection?

Here Server is using randomly selected ports, so we can't hardcode port at client.

Client is getting information of port from configuration file created at user's local directory.

Thanks

Re: Ways to re-establish connection between client and server on remoting?

mav.northwind14-Dec-07 1:22

mav.northwind

14-Dec-07 1:22

From my experience, you only get the exception if you try to call a remote method while the server is down. As soon as the remoting server is running again, all remoting method calls work as if the server was there all the time.

If you say that the server is using randomly selected ports, how do your clients connect to the remoting server?
You have to give a URI for the remoting server object and part of it is the port, so how can this be "randomly selected"?

Regards,
mav

--
Black holes are the places where God divided by 0...

In console App can i bound an area for user entry?

dipak.dipak13-Dec-07 7:11

dipak.dipak

13-Dec-07 7:11

hello everybody,

I have set some text as labels used in windows app, then I have set the Cursor one bye one for their respective input. Now I want to set fixed width for their fixed input size, as user cannot enter more text as much allow for that. I want also to change the BackGroundColor for their fixed input area.

Please help me. Rose | [Rose]

Thank You

Dipak

Re: In console App can i bound an area for user entry?

Skippums13-Dec-07 7:53

Skippums

13-Dec-07 7:53

Just use Console.ReadKey in a while loop, and keep track of how many keys they have entered (or keep track of the cursor position). The code would be similar to the following:

ConsoleKeyInfo cki;
string str = string.Empty;
do {
    cki = Console.ReadKey(true);
    switch (cki.Key) {
        case ConsoleKey.LeftArrow:
            --Console.CursorLeft;
            break;
        case ConsoleKey.RightArrow:
            ++Console.CursorLeft;
            break;
        case ConsoleKey.UpArrow:
            goto case ConsoleKey.Home;
        case ConsoleKey.DownArrow:
            goto case ConsoleKey.End;
        case ConsoleKey.Home:
            Console.CursorLeft = 0;
            break;
        case ConsoleKey.End:
            Console.CursorLeft = 20;
            break;
        default:
            if (IsPrintable(cki.Key)) {
                str.PadRight(Console.CursorLeft - str.Length + 1, ' ');
                str[Console.CursorLeft] = cki.KeyChar;
                Console.Write(cki.KeyChar);
            }
            break;
    }
    if (Console.CursorLeft > 20)
        --Console.CursorLeft;
} while (cki.Key != ConsoleKey.Enter);

Hope this helps,

Sounds like somebody's got a case of the Mondays

-Jeff

extracting a certain text from a string before and after a comma

jimmy2shoes13-Dec-07 7:08

jimmy2shoes

13-Dec-07 7:08

fellas been developing a c# battleship game and have did go enuf so far

quick question, when i shot at the grid i write back the coordinates such as 1-1, but this is trying to compare it will the coordinates of the sub(for example) which is 1-1,2-1, but i tseems to trying to compare againest the entire coordinates how would i extract the 1-1 or the 2-1??

the cooridnates can go past 10 meaning it cant be a set number

any help please?

thanks

Re: extracting a certain text from a string before and after a comma

Skippums13-Dec-07 7:35

Skippums

13-Dec-07 7:35

Take Chris's advice from your previous post... make a 2-dimensional array of type bool, then just check to see if that bool is true to see if there is a ship at that location. If you are dead set on doing it with strings, then you should use the string.Split(',') method, then see if the resulting collection contains the string 1-1. Conversely, you could use the string.Contains("1-1") method as well (I think the second is a method, but I am not certain). Hope this helps,

Sounds like somebody's got a case of the Mondays

-Jeff

Re: extracting a certain text from a string before and after a comma

dipak.dipak13-Dec-07 7:43

dipak.dipak

13-Dec-07 7:43

Hello, This is the sample code i have prepired for you now.

public void fnCutText()
{ //Code By Dipak (dipak.dipak@gmail.com)
String strMyString = "abcd,efgh,ijkl,mnop,qrst";
String strTemp = "";
String[] strStrings = new String[100]; int i;
for (i = 0; strMyString.Length > 0; i++)
{
if (strMyString.Contains(","))
{
strTemp = strMyString.Substring(0, strMyString.IndexOf(","));
strStrings[i] = strTemp;
strMyString = strMyString.Substring(strMyString.IndexOf(",") + 1);
}
else
{
strStrings[i] = strMyString;
strMyString = "";
}
}
}

I think u can continue your work.
Best of Luck. Smile | :)

Good Night. Cry | :((

Dipak

Re: extracting a certain text from a string before and after a comma

Nouman Bhatti13-Dec-07 19:54

Nouman Bhatti

13-Dec-07 19:54

Use string.split(",".tochararray())

Inconsistency with connection to the web server!!

Jedidah13-Dec-07 4:03

Jedidah

13-Dec-07 4:03

I have this app that sometimes when a user logs in,it will tell the user that the method cannot be called on null values.But when I restart the IIS and still log in with the same name and password,the app will accept.And it will run again for sometime and again it will be giving the same error that method cannot be called on null values.But each time I restart the IIS on the server,the error will disappear.Please do anybody have any clue why this is like this?

Re: Inconsistency with connection to the web server!!

Paul Conrad23-Dec-07 9:54

Paul Conrad

23-Dec-07 9:54

Do you have this working yet?

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Re: Inconsistency with connection to the web server!!

Jedidah24-Dec-07 2:16

Jedidah

24-Dec-07 2:16

Nope! Any clue?

using reflection on generics

Bekjong13-Dec-07 2:56

Bekjong

13-Dec-07 2:56

Hi,

I'm really stuck here. I'm using reflection to perform an action of all fields that implement a certain interface in a class.

For normal fields, this works fine, but some of the members are generic Dictionary classes in which the content to perform an action on is in the TValue part. Somehow I need to extract that data from the dictionary.

I've been staring at MSDN pages for a few hours now and trying all sorts of things, help would be very much appreciated.

Here's the piece of code.

private void BindToComdriver(ABaseData target)
    {
        // get all data members in this class
        FieldInfo[] fields = target.GetType().GetFields(System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);

        // and see if we can use them
        foreach (FieldInfo field in fields)
        {
            Type[] interfaces = field.FieldType.GetInterfaces();

            // check the content of collection in the class too
            if (t == typeof(ICollection) || t is ICollection)
            {
                ICollection col = field.GetValue(target) as ICollection;
                object[] oma = new object[col.Count];
                col.CopyTo(oma, 0);
                Type generic_type = field.FieldType.GetGenericTypeDefinition();

                foreach (object m in oma)
                {
                    if (generic_type.GetGenericArguments().Length > 1)
                    {
                        // should be a dictionary class, since it has more than one generic parameter
                        // the oma array should be filled with objects of type KeyValuePair<tkey, tvalue="">
                        // I want to find out if type TValue implements my interface IBindable
                    }

                    // ...

                }
            }

            if(t == typeof(IBindable) || t is IBindable) 
            {
                Bind(field.GetValue(target));
            }

            // ...


        }</tkey,>

Standards are great! Everybody should have one!

Re: using reflection on generics [modified]

Mr. Candyman13-Dec-07 4:59

Mr. Candyman

13-Dec-07 4:59

foreach(Type var in genericarguments)
{
if(var.GetInterface("name",true) != null)
//do actions...
}

I think, but not sure...

modified on Thursday, December 13, 2007 11:05:18 AM

Re: using reflection on generics

Bekjong13-Dec-07 5:15

Bekjong

13-Dec-07 5:15

Thanks for the reply. Unfortunately that's not working... Any ideas on how to extract the instance value of TValue?

Standards are great! Everybody should have one!

Image scaling

N a v a n e e t h13-Dec-07 2:49

N a v a n e e t h

13-Dec-07 2:49

I need ideas for scaling down an image. I tried Image.GetThumbnailImage(), I am able to scale it down, but it lost the clarity. So is there any efficient method to scale the image without loosing clarity ?

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Re: Image scaling

m@u13-Dec-07 3:49

m@u

13-Dec-07 3:49

Microsoft recommends Image.GetThumbnailImage() only for Targetsizes <= 120x120. (found here[^])

did you try Image myImg = new Bitmap(sourceImage, someWidth, someHeight);?

i had good results also with Graphics.DrawImage(someImage, someRect); if you only want to draw it somewhere..

greets
m@u

Re: Image scaling

Ajay.k_Singh13-Dec-07 3:50

Ajay.k_Singh

13-Dec-07 3:50

You may resize an image using DrawImage method of graphics object.

Following is a small code snippet showing this-

--------------------Code Start-------------------

Bitmap SourceImage= (System.Drawing.Bitmap ) Image.FromFile("C:\\img1.jpg");

Bitmap ScaledImage = new Bitmap(50, 50); //you may set size of scaled image here.

Graphics g = Graphics.FromImage(ScaledImage);

g.DrawImage(SourceImage, new Rectangle(0, 0, 50, 50), new Rectangle(0, 0, SourceImage.Width, SourceImage.Height), GraphicsUnit.Pixel);

ScaledImage.Save("C:\\scaledimg.jpg");

-------------------------Code End--------------------

I hope this helps Smile | :)

.

-Dave.

Dave Traister,
ComponentOne LLC.
www.componentone.com

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