C# Discussion Boards - CodeProject

yyf2-Sep-03 11:19

2-Sep-03 11:19

I need to position a form in certain place. Supposed I have a form named "form1", I did this:

form1.StartPosition = FormStartPosition.Manual;
form1.Location = new Point( 100, 100 );

But it doesn't work. The form1 just keep staying at (0, 0). Can anyone tell me why?

Thanks in advance!

Re: How I can position a form?

yyf2-Sep-03 11:31

yyf

2-Sep-03 11:31

sorry, There's a bug in my program. Now is ok. Thanks for reading.

Databindings

yyf2-Sep-03 10:44

yyf

2-Sep-03 10:44

How to bind a ComboBox to an valuable? Such as, I want to bind the ComboBox.SelectedItem and another valuable(string s) together. How can I do that?

Thanks!

Re: Databindings

Gilles B.2-Sep-03 12:41

Gilles B.

2-Sep-03 12:41

I'm not sure I fully understand your problem. Btw look at MSDN
library: (ex: ComboBox.DataSource).
Using DataSource property to associate a collection to your ComboBox, you have both a "DisplayMember" property, and a "ValueMember" property. I think this will solve your problem.

Gilles

Re: Databindings

yyf2-Sep-03 12:59

yyf

2-Sep-03 12:59

Sorry, I didn't make myself very clear. Thank you for answering and I got confused about this for a long time.

But now my problem is: I want to connect a valuable and a combobox together. when the valuable changes, the selection of combobox changes too. on the other hand, when the selection of combobox change, this valuable will change too.

But I don't know how to do that in C#. Do you have any ideas about this one?

Thanks in advance.

Re: Databindings

Ista2-Sep-03 16:54

Ista

2-Sep-03 16:54

a value or a variable

ComboBox1 has its own items including ID which dictates COmboBox2

Table1

CustomerName
CustomerID

Table2

StoreName
StoreID
CustomerID

As you can see the relationship is a customer has 0 or many stores and a store must have 1 customer

ComboBox1.DataSource = Table["CUstomer"].DefaultView;
ComboBox1.DisplayMember = "Name";
ComboBox1.ValueMember = "ID";

ComboBox2.DataSource = Table["Stores"].DefaultView;
ComboBox2.DisplayMember = "Name";
ComboBox2.ValueMember = ComboBox1.SelectedValue;

try that out, when you change combo1 the combo2 is updated based on the relationshipID.

to make them change each other makes no sense really, its a circular relationship which would require for you to hand pick the relationships in which

you would sink the SelectedIndex_Changed event and make your changes there.

nick

I'm not an expert yet, but I play one at work. Yeah and here too.

DataBindings

yyf2-Sep-03 10:27

yyf

2-Sep-03 10:27

I wrote the code using DataBindings like that:

checkBox1.DataBindings.Add("Checked", MyClass, "bValue" );

"checkBox1.Checked" and MyClass.bValue were supposed to be changed whenever the other one was changed.

But, when I changed the value of check1.Checked, like this:

checkBox1.Checked = false;

MyClass.Value was not changed.

Can anyone tell me why?

Thanks in advance!

Re: DataBindings

Ista2-Sep-03 16:56

Ista

2-Sep-03 16:56

what does more code look like?

I mean does your class have get and set accessors. dont use public fields because you need to validate the data. what if a null comes from a database or somewhere. your code will break.

nick

I'm not an expert yet, but I play one at work. Yeah and here too.

Authenticating to a web site

roberthanacek2-Sep-03 10:24

roberthanacek

2-Sep-03 10:24

I am trying to automate login to a site for a subsequent file upload. Even though I set the Content-Length header I keep getting the 411 (length required) response error.

I begin with an initial unauthorized request to a form-authenticated page.
I extract the session cookie from the response header and attach it to the next request I send by POST method, along with the required authentication info. The program halts as soon as I try to access the next response, referring to the abovementioned error code.
Please tell me what I'm missing...

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
using System;
using System.Net;
using System.Web;
using System.Text;
using System.IO;

public class Loader {

private HttpWebRequest request;
private HttpWebResponse response;
private CookieCollection cookies;
private string url = "http://www.somedomain.com/member/home.jsp";
private string logPath = @"c:\\loader\response.log";
/*-------------------------------------------------------------------------*/
public static void Main() {

Loader loader = new Loader();

loader.MakeInitRequest();
loader.SendAuthInfo();

} // end Main
/*-------------------------------------------------------------------------*/
public void MakeInitRequest() {

request = (HttpWebRequest) WebRequest.Create(url);

// Set the request's CookieContainer
request.CookieContainer = new CookieContainer();

response = (HttpWebResponse) request.GetResponse();

// Capture cookies from the initial response
cookies = response.Cookies;

// Log the response
this.LogResponse("\n\n************INITIAL RESPONSE:************\n\n");

response.Close();

} // end MakeInitRequest
/*-------------------------------------------------------------------------*/
public void SendAuthInfo() {

string username = "my_username";
string password = "my_password";
string postData = "j_username=" + HttpUtility.UrlEncode(username) +
"&j_password=" + HttpUtility.UrlEncode(password);
byte[] postDataBytes = Encoding.ASCII.GetBytes(postData);

request = (HttpWebRequest) WebRequest.Create(url);

// Set the cookies from the initial response to this request
if (cookies != null) {
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
// Set the request headers
request.Method = "POST";
request.ContentType = "application-www-form-urlencoded";
request.ContentLength = postDataBytes.Length;

// Post authentication info
StreamWriter writer = new StreamWriter( request.GetRequestStream() );
writer.Write(postDataBytes);

// Log the response
response = (HttpWebResponse) request.GetResponse();
this.LogResponse("\n\n************NEXT RESPONSE************\n\n");

response.Close();
writer.Close();

} // end SendAuthInfo
/*-------------------------------------------------------------------------*/
private string DisplayResponseHeaders(WebHeaderCollection headers) {

StringBuilder buffer = new StringBuilder();

// Capture each header:value pair
foreach(string header in headers) {
buffer.Append(header + ": " + headers[header] + "\n");
}

return buffer.ToString();
} // end DisplayResponseHeaders
/*-------------------------------------------------------------------------*/
private void LogResponse(string title) {

FileStream fStream =
new FileStream(logPath, FileMode.Append, FileAccess.Write);
StreamWriter logWriter = new StreamWriter(fStream);
StreamReader reader = new StreamReader(response.GetResponseStream());
string responseString;

// Log the response
responseString =
this.DisplayResponseHeaders(response.Headers) +
reader.ReadToEnd();
logWriter.Write(title + responseString);

reader.Close();
logWriter.Close();
fStream.Close();

} // end LogResponse
/*-------------------------------------------------------------------------*/
} // end class Loader

Re: Authenticating to a web site

leppie2-Sep-03 12:09

leppie

2-Sep-03 12:09

hankie wrote:
private string logPath = @"c:\\loader\response.log";

Fix that 1st.

leppie ::AllocCPArticle("Zee blog");

SingleCall Objects not Disposing

0siris2-Sep-03 8:03

0siris

2-Sep-03 8:03

I have created a Database Object on a Remoting Server that is not disposing when the function call is returned? Why would this be happening? WTF | :WTF:

Override the asterisk and row arrow in datagrid

Ista2-Sep-03 7:02

Ista

2-Sep-03 7:02

Yes how can i override the drawing inside the row header

nick

I'm not an expert yet, but I play one at work. Yeah and here too.

(Rich) Text Box and cursor position

Frank Olorin Rizzi2-Sep-03 5:59

Frank Olorin Rizzi

2-Sep-03 5:59

Hi all.
I've searched through the forums but couldn't find an answer.

I have a rich text box (but the question stands even for "simple" text boxes),
and I would like to get the cursor's position within it.

Something like "line X column Y", or even just "char Z".

Any suggestions?

In particular, I'm trying to get to this info from the
handler of a mouse click event on the rich text box
--just in case the System.Windows.Forms.MouseEventArgs parameter can help

Thanks in advance,
F.O.R.

Re: (Rich) Text Box and cursor position

Frank Olorin Rizzi2-Sep-03 6:07

Frank Olorin Rizzi

2-Sep-03 6:07

Well, so far here's what I found... if anyone has any better idea, feel free to post Smile | :)

<br />
//In the handler for the mouse-click on the rich text box...<br />
//where e is the System.Windows.Forms.MouseEventArgs parameter...<br />
<br />
int ndex = this.rBox_MarkedUp.GetCharIndexFromPosition(<br />
  new System.Drawing.Point(e.X, e.Y));<br />
int line = this.rBox_MarkedUp.GetLineFromCharIndex(ndex);<br />

ndex is now the 0-based index of the char clicked
and
line is the number of the line (0-based as well).

We now return to the usual stream of questions Smile | :)

Thanks,
F.O.R.

Re: (Rich) Text Box and cursor position

.gonad2-Sep-03 6:47

.gonad

2-Sep-03 6:47

Hi.
I just went thru this as well, but this is what i worked out. it's basically the same thing you already figured out.

private void rtb1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)<br />
		{<br />
			leftMouse(e.X, e.Y);<br />
		}<br />
<br />
private void leftMouse(int X, int Y)<br />
		{<br />
			posStart = rtb1.GetCharIndexFromPosition(new Point(X, Y));<br />
		}

Can you use functions like sprintf in c#

IrishSonic2-Sep-03 5:59

IrishSonic

2-Sep-03 5:59

Can you use functions like sprintf in c#??

If so, what namespace would you need to use them??
Because you can't do #include <stdio.h>

Or can you???!!!!????

Re: Can you use functions like sprintf in c#

flipdoubt2-Sep-03 7:04

flipdoubt

2-Sep-03 7:04

Why not just use String.Format?

Re: Can you use functions like sprintf in c#

leppie2-Sep-03 12:14

leppie

2-Sep-03 12:14

There is a nice section in the C Runtime Lib docs on MSDN that shows you exactly how the functions maps. Sorry no link.

leppie ::AllocCPArticle("Zee blog");

Thanks, will check it out.

IrishSonic2-Sep-03 22:06

IrishSonic

2-Sep-03 22:06

Thanks

Office Xp Task Panel

Sanjay Rastogi2-Sep-03 3:15

Sanjay Rastogi

2-Sep-03 3:15

Hi !

I'm new to this whole .NET framework stuff. I want to implement "Office XP Task Panel" like functionality and
how to attached two windows.

Thanks & Regards
Sanjay Rastogi

SingleCall and Threads Forever

Member 4744652-Sep-03 2:32

Member 474465

2-Sep-03 2:32

Dear sirs,

I would like to get more information about SingleCall servers like:

1- Is it possible to persist data in SingleCall server ? If so, how ?

2- Is it possible to keep a thread running indefinitly in a SingleCall
server ?

3- I need to develop a SingleCall server that keep several threads
running, to monitor something, like a Process Scheduler, for example.
My questions are:
- When (and where) do I need to start them ?
- When (and where) do I need to stop them ?
- How long will them still running ?

4- In a SingleCall server, is it possible to share data among server
calls using static variables ?

Thank you very much.
Marcos.

Win32 API Wrapper

vikramlinux1-Sep-03 23:34

vikramlinux

1-Sep-03 23:34

Hi friends,
Is there any new class,namespace now available with C# to invoke win32 APIs like SendMessage?

VikramS

Re: Win32 API Wrapper

J. Dunlap2-Sep-03 9:20

J. Dunlap

2-Sep-03 9:20

You can easily declare Windows APIs in your code. For instance, SendMessage would be:

[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);

This article[^] has a large number of Win32 constants, functions, and structures declared.

"Blessed are the peacemakers, for they shall be called sons of God." - Jesus

"You must be the change you wish to see in the world." - Mahatma Gandhi

Trouble with 'set' accessor

mikeirwin1-Sep-03 20:01

mikeirwin

1-Sep-03 20:01

I'm having a little difficulty with the set accessor. I'm working on a template-based site design and trying to use the set accessor to set the document's title. The problem is that it's not setting the title and I can't seem to figure out what I'm missing. Here's some sample code:

---
ControlBase.cs
---
public class ControlBase : System.Web.UI.UserControl
{
private string _strTitle;

public string Title
{
get
{
return _strTitle;
}

set
{
_strTitle = value;
}
}
}

---
Default.aspx
---
<%@ Page language="c#" Codebehind="Default.aspx.cs" AutoEventWireup="false"
Inherits="namespace.PageBase" %>
...
<title><asp:literal id="litTitle" runat="server"></asp:literal></title>

---
Default.aspx.cs
---
public class PageBase : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Literal litTitle;
private ControlBase _ctlContent;

private void Page_PreRender(object sender, System.EventArgs e)
{
if (_ctlContent.Title != string.Empty)
{
this.litTitle.Text = _ctlContent.Title;
}
}
}

---
Default.ascx.cs
---
public class Default : ControlBase
{
private void Page_Load(object sender, System.EventArgs e)
{
this.Title = "This should be the title of the document";
}
}

Re: Trouble with 'set' accessor

Ista2-Sep-03 7:01

Ista

2-Sep-03 7:01

your class is fine. its how your populating it freom the asp page is the problem.

nick

I'm not an expert yet, but I play one at work. Yeah and here too.

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