Databindings - C# Discussion Boards

Re: Getting the project's/executable's root path

David Stone2-Sep-03 15:17

David Stone

2-Sep-03 15:17

Application.StartupPath ?

I don't know whether it's just the light but I swear the database server gives me dirty looks everytime I wander past.
-Chris Maunder

Re: Getting the project's/executable's root path

tsigo2-Sep-03 15:26

tsigo

2-Sep-03 15:26

That did it, thanks.

Connection to network shares

Trojan2K2-Sep-03 13:09

Trojan2K

2-Sep-03 13:09

Hi All,

I dunno if I'm being blind or a bit stupid, but this problem is bugging me now Smile | :)

Im trying to connect to a share on a server on a different domain, I know that if the user logged
on and running program has credentials for this share then it works easily simply using Directory and File from System.IO,

However I cant give the users access to the server itself so I need the program to control its own access by specifying the un/pw/domain name at time of connection , I thought this owuld be easy considering that the Framework is by definition geared towards internetworking , but I guess I may be wrong !

I can make the connection Ok if I call the 'net use' command from a diagnostics process, but I dont like this, because of timing and the potential security risk, IE if the program crashes then the user will have access to the particular network share through my computer.

THe other way I know of, is to wrap the functions of MPR.DLL and simply use WNET to make and destroy my connections ... this works fine but doesn't seem like the best solution ...

Anybody have any ideas or indeed the correct way of doing this ?

Thanks very much.

Re: Connection to network shares

Mazdak2-Sep-03 20:18

Mazdak

2-Sep-03 20:18

Yes,in .net connecting to share network is missed,See if this articles helps:

http://www.codeproject.com/csharp/networkshares.asp[^]

Mazy

No sig. available now.

SQLDMO

yyf2-Sep-03 12:18

yyf

2-Sep-03 12:18

Hi, I tried to use SQLDMO to get a list of available sqlserver's name in .Net with C#. Here is my code:

SQLDMO.ApplicationClass oSQLServerDMOApp = new SQLDMO.ApplicationClass();<br />
SQLDMO.NameList oNameList;<br />
            oNameList=oSQLServerDMOApp.ListAvailableSQLServers();

However, it always failed at the last code of "ListAvailableSQLServers".

Can anyone please tell me why? (I have been worked on this for weeks) Thank you very much.

How I can position a form?

yyf2-Sep-03 11:19

yyf

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

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