Visual C# Express 2005 - C# Discussion Boards

greatnorthern2-Dec-06 17:35

2-Dec-06 17:35

Hi,

I am new to C#. I am fiddling with various aspects and I would like to pass data between 2 classes (bear in mind I come from a structured programming background so some of the OO concepts are still new to me). I came across this article:

http://www.codeproject.com/useritems/pass_data_between_forms.asp

I decided to go down the properties path. Briefly:

there are 2 form classes in my project
form1 launches form2
so I create a new instance of form2, populate it and launch no problem
going the other way though I want to pass data back
- I can't create a new instance of form1. Pointless
- If I reference the form1 property directly (ie. Form1._prop) the compiler rejects it (an object reference is reqd)

Any thoughts on how to pass data back up before leaving the form2? Incidentally, form2 closes when returning to form1.

Re: passing data between classes

Ravi Bhavnani2-Dec-06 18:45

Ravi Bhavnani

2-Dec-06 18:45

When form1 launches form2, it (form1) should pass form2 a reference to itself. When form2 needs to set a Form1 property, it can then reference form1.Prop.

/ravi

My new year's resolution: 2048 x 1536
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Re: passing data between classes

ed^nrgc4-Dec-06 4:16

ed^nrgc

4-Dec-06 4:16

>>> HOMEWORK ALERT <<<

How can OdbcAdapter update data to mySql database with the right format (codepage 1250)

laptrinhpro2-Dec-06 16:50

laptrinhpro

2-Dec-06 16:50

Hi everybody!
I write a program by C# .Net 2005 using Odbc connect to database mySQL.
There is a problem when I use OdbcAdapter update data to database, saved data is wrong. I want to save data with encode is "codepage 1250" like format of webpage. My goal is webpage can show this data with right format.
Can you help me!
Thank!

help me!

laptrinhpro2-Dec-06 16:43

laptrinhpro

2-Dec-06 16:43

Re: help me!

ed^nrgc4-Dec-06 4:17

ed^nrgc

4-Dec-06 4:17

er, what?? Confused | :confused:

Re: help me!

laptrinhpro4-Dec-06 19:45

laptrinhpro

4-Dec-06 19:45

Thank edboe!
you had replied to me. My problem had gone over!
That is very simple.
I found it in this page: http://www.codeproject.com/aspnet/Encoding_in_ASPNET.asp?df=100&forumid=36264&exp=0&select=801750">http://www.codeproject.com/aspnet/Encoding_in_ASPNET.asp?df=100&forumid=36264&exp=0&select=801750
Roll eyes | :rolleyes:

Visual C# Express 2005

NewTuCSharp2-Dec-06 9:09

NewTuCSharp

2-Dec-06 9:09

I suffer from Rheumatiod Arthritis and I am developing a program to track my Pain so that I can aid in my treatment. I am looking for some help in developing a round button that I can place images on. I have looked at some of the projects on this site but I cannot seem to rework so that I can create the button. Can someone help I have typed until my fingers are about to fall off trying to make this work. I am really new to C# so that is a barrier as well.

NewTuCSharp

Thanks for the Advice

NewTuCsharp

Re: Visual C# Express 2005

Judah Gabriel Himango2-Dec-06 9:54

Judah Gabriel Himango

2-Dec-06 9:54

Have you searched CodeProject articles for round button? I quick search reveals several articles. Here's one[^].

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: God-as-Judge, God-as-Forgiver
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: Visual C# Express 2005

NewTuCSharp2-Dec-06 9:59

NewTuCSharp

2-Dec-06 9:59

Thanks,

That is where I started and I found one that I could import but I cannot put an image on it. I would like to learn to do it from scratch but I've followed some of the examples but have not successfully been able to create and use it. That is why I am asking for help.

Thanks for the Advice

NewTuCsharp

Re: Visual C# Express 2005

Christian Graus2-Dec-06 10:33

Christian Graus

2-Dec-06 10:33

OK, some comments

1 - if you're that new to C#, you probably need to spend some time learning the language, rather than trying to write an app you're going to want to use.
2 - if you've tried to write some code before asking ( good for you - many people don't bother ), then post it, so we can tell you where it's going wrong
3 - why do you need round buttons ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: Visual C# Express 2005

ed^nrgc4-Dec-06 4:19

ed^nrgc

4-Dec-06 4:19

Why do you "NEED" round buttons? Do they help arthritis, like copper bangle bracelets?

redirecting output

theFrenchHornet2-Dec-06 8:18

theFrenchHornet

2-Dec-06 8:18

I have a solution with C# code in one project calling unmanaged C++, which is in a separate project. The C++ code uses cout <<. These lines of output come to the output window in the debugger. Can I redirect them to a file without changing the code? If so, how?

Thanks for any help.

Re: redirecting output

Judah Gabriel Himango2-Dec-06 9:53

Judah Gabriel Himango

2-Dec-06 9:53

Have you looked at System.Diagnostics.Process class? It has some methods on it for redirecting standard output.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: God-as-Judge, God-as-Forgiver
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: redirecting output

theFrenchHornet2-Dec-06 10:06

theFrenchHornet

2-Dec-06 10:06

I don't want to change code. I was thinking along the lines of how you would do it if running from a dos prompt/command line:
$ aprog.exe > outfile.txt
I tried putting " > outfile.txt" on the command parameters line in the debug properties of both projects, but this had no effect.

code to validate date field in a combobox

ursbuddy2-Dec-06 6:12

ursbuddy

2-Dec-06 6:12

i need the code of validation of date field in a combobox using c# for a windows based application

alok tripathi

Re: code to validate date field in a combobox

User 66582-Dec-06 6:19

User 6658

2-Dec-06 6:19

try
{  
    DateTime time = DateTime.TryParse(text);
}
catch(FormatException)
{
  // oops, error
}

regards

modified 12-Sep-18 21:01pm.

Export datagrid with image to word file

josueaspnet2-Dec-06 5:06

josueaspnet

2-Dec-06 5:06

My datagrid has <asp:image id="image" imageurl="">
I have a solution using:

Response.ContentType = "application/vnd.doc"
Dim stringWrite As New System.IO.StringWriter
Dim htmlWrite As New System.Web.UI.HtmlTextWriter(stringWrite)
MyDatagrid.RenderControl(htmlWrite)

but in my word file have a link to jpg file.
The problem is that my word file allways needs on-line for view the images.
Please how I can export my datagrid with image inside word file???????

holas

Message Removed

2-Dec-06 3:15

Reza Shademani

2-Dec-06 3:15

Message Removed

Re: Access vector from C#

Judah Gabriel Himango2-Dec-06 9:57

Judah Gabriel Himango

2-Dec-06 9:57

How To Marshal arrays using P/Invoke[^].

FWIW, I don't think it's possible to marshal STL vector lists to C#. You'll need to convert it into something the CLR can marshal properly.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: God-as-Judge, God-as-Forgiver
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: Access vector from C#

Christian Graus2-Dec-06 10:39

Christian Graus

2-Dec-06 10:39

But a vector is going to be an array ( although the standard doesn't say it has to be, the rules it defines pretty much mean it will be ).

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Chat Server

SaarDagan2-Dec-06 0:36

SaarDagan

2-Dec-06 0:36

hi.
i am building a chat server for a project i need.
i need to use a list view for the users who are connected to my server.
i can add them easylly using a string array but my problem is how to approach them afterwards??
like i want to make there user name as a key so if the user disconnects it will show up in the list view status column that i made as disconnected and not connected.
for that i need direct access to the actuall item.
so again my question is how to do that?
i would really apprechate your answers.

thanks alot
Saar Dagan
Smile | :)

Re: Chat Server

Bassam Saoud2-Dec-06 1:08

Bassam Saoud

2-Dec-06 1:08

SaarDagan wrote:
i want to make there user name as a key

why dont you use Hashtable with User name as key or NameValueCollection ?

Re: Chat Server

abd_o_d3-Dec-06 8:19

abd_o_d

3-Dec-06 8:19

Hi, if u r still looking for answer about your question I have one, I have worked on something like this and I've used a database.mdb with a checkbox feild that specifies wether the user online or not, and this can help in viewing the users as online and offline in the list view, the code is something like the following:

<br />
        Dim onlineusers As Integer<br />
        Dim cnn As New OleDbConnection<br />
        Dim da As OleDbDataReader<br />
        Dim cmd As New OleDbCommand<br />
        ListView1.Clear()cnn.ConnectionString= "Provider=Microsoft.JET.OLEDB.4.0;DATASOURCE=\\127.0.0.1\Messenger\chatdb.MDB"<br />
        cnn.Open()<br />
        cmd.Connection = cnn<br />
        cmd.CommandText = "select nickname,online from users"<br />
        da = cmd.ExecuteReader()<br />
        Do While da.Read<br />
            If da.GetValue(1) = "False" Then<br />
                ListView1.Items.Add(da.GetValue(0), 2)<br />
            Else<br />
                ListView1.Items.Add(da.GetValue(0), 1)<br />
            End If<br />
<br />
        Loop<br />
        cnn.Close()

in the previous code, the value 2 stands for the list item that represents offline user, and 1 for online user.

**3bood**
Just Wanna Learn More

Gridview Sorting Problem

fahiemulleh1-Dec-06 23:37

fahiemulleh

1-Dec-06 23:37

Hi all. I want to associate upward and downward arrow while sorting . Please tell me is there any built in property to do that or i have to do it programmatically. I want something like:

http://demos.devexpress.com/ASPxGrid2Demos/CS/[^]

Please help me in this regard.

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