save & open file... - C# Discussion Boards

Christian Graus25-Apr-07 19:22

25-Apr-07 19:22

Oh, you're using VS2003. Then WriteAllText is not an option.

mr jets wrote:
cannot implicity convert type 'System.IO.StreamWritet'to 'System.IO.Stream'.

You keep posting this, there's no such thing as StreamWritet, is this really not a typo ?

System.IO.FileStream fs = new System.IO.FileStream("c:\\testing.txt", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite);

// create a stream writer
System.IO.StreamWriter sw = new System.IO.StreamWriter(fs, System.Text.Encoding.ASCII);

// write to file (buffer), where textbox1 is your text box
sw.Write("text");

// flush buffer (so the text really goes into the file)
sw.Flush();

// close stream writer and file
sw.Close();
fs.Close();

Perhaps the defaults for the params you're not passing in, are not the ones you need ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

mr jets26-Apr-07 5:22

26-Apr-07 5:22

i reaally appreciat ur time bro..okie ur code creating atext in c drive but it doesnt save the values of (x,y,..) remember bro my program like Paint ..so when i open the text it doesnt display my drawings (line,polygon,..)
thats my open code :
{
OpenFileDialog fileChooser=new OpenFileDialog();
DialogResult result = fileChooser.ShowDialog();
String fileName ; // name of file to containing data
// exit event handler if user clicked "cancel"
if (result == DialogResult.Cancel)
return;
// get specified file name
fileName= fileChooser.FileName;
//show error if user specified invalid file
if (fileName=="" || fileName==null)
MessageBox.Show("Invalid File Name ","Error",MessageBoxButtons.OK,MessageBoxIcon.Error);
else
//creat Filestream to obtain read access to file
input = new FileStream(fileName,FileMode.Open,FileAccess.Read);

}

Regards ; Sigh | :sigh:

Christian Graus26-Apr-07 11:16

26-Apr-07 11:16

I'm not sure that I understand. I see you opening a file stream, but I don't see you reading anything, nor does the fact that you read the text have anything to do with seeing polygons ( there's a step in the middle where the text is intepreted to give you the data to show that )

mr jets26-Apr-07 13:00

26-Apr-07 13:00

thank god u back ..iam soo close to break my pc...u said
(there's a step in the middle where the text is intepreted to give you the data to show that )
can u just tell me what that step..iam baggginngg Christian D'Oh! | :doh:

Regards ;

Christian Graus26-Apr-07 22:08

Re: postback or DoPostback

26-Apr-07 22:08

I have no idea. Reading a text file is NOT going to do anything more than put some text into a piece of memory. For that to turn into ellipses, or whatever, you need to write some code that does that.

So, it depends. what is in this text file ? How did it get there ? How did you expect this text to become something on your screen ?

postback or DoPostback

karl170125-Apr-07 14:46

karl1701

25-Apr-07 14:46

I am attempting to programmatically call a hyperlink in a webbrowser control. The links are simply numbers 123456789… each corresponding to a new page to navigate to. The reference to each page is of the form “” where each page corresponds to a parameter as follows:

Page 1 is ---- javascript:__doPostBack('grdjo$_ctl1$_ctl1','')
Page 2 is ---- javascript:__doPostBack('grdjo$_ctl1$_ctl2','')
Page 3 is ---- javascript:__doPostBack('grdjo$_ctl1$_ctl3','')
…

The page uses the Javascript postback function below:

I am able to load the page using HttpWebRequest & HttpWebREsponse and have passed in the parameter to load the page as follows.

byte[] buffer = Encoding.ASCII.GetBytes("grdjo$_ctl1$_ctl6");

yet the page will not load the correct content, it keeps loading the first page of links. I know I am doing something wrong. Any ideas?

Thanks

Karl

karl170125-Apr-07 16:17

karl1701

25-Apr-07 16:17

Here is the code that does the postback...

string strParm1Val = "grdjo$_ctl1$_ctl6";
string strParm2Val = "";
string strPage = "http://somepage.com/frmjosearchp.aspx?GUID=www&keyword=&FOFID=400194";

string strData = "";

frd.Controls["resultsRichTextBox"].Text = "LOADING PAGE....";

byte[] buffer = Encoding.ASCII.GetBytes(strParm1Val + "&" + strParm2Val);
//Init
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(strPage);

//Our method is post, otherwise the buffer (postvars) would be useless
WebReq.Method = "POST";

//We use form contentType, for the postvars.
WebReq.ContentType = "application/x-www-form-urlencoded";

//The length of the buffer (postvars) is used as contentlength.
WebReq.ContentLength = buffer.Length;

//We open a stream for writing the postvars
Stream PostData = WebReq.GetRequestStream();

//Now we write, and afterwards, we close. Closing is always important!
PostData.Write(buffer, 0, buffer.Length);
PostData.Close();

//Get the response handle, we have no true response yet!
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();

//Let's show some information about the response
Console.WriteLine(WebResp.StatusCode);
Console.WriteLine(WebResp.Server);

//Now, we read the response (the string), and output it.
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
strData = _Answer.ReadToEnd();
_Answer.Dispose();

//Console.WriteLine(_Answer.ReadToEnd());

//update controls on other forms
frd.Controls["ResultstextBox"].Text = strData;
frd.Controls["resultsRichTextBox"].Text = strData;
Uri siteUri = new Uri((string)strPage);
webBrowser1.Url = siteUri;

save & open file...

mr jets25-Apr-07 14:32

25-Apr-07 14:32

good morning ..every one !
ok..i wanna to make aprograme that can draw(ellipse,lines,..) but i have aproblems with saving & opening file ..my save code is:
FileStream outStream=File.Create(saveFileDialog1.FileName);//To create text file
StreamWriter streamWriter=new StreamWriter(outStream);
the error...>>(cannot implicity convert type 'System.IO.StreamWritet'to 'System.IO.Stream'.

plzz send me back...as fast as u can
Regards; Smile | :)

Christian Graus25-Apr-07 14:43

25-Apr-07 14:43

mr jets wrote:
as fast as u can

I recommend not saying things like this when asking for free advice.

System.IO.File.WriteAllLines or System.IO.File.WriteAllText are the easiest way to create a text file.

Having said that, your code compiles just fine here. What line gives the error ?

mr jets25-Apr-07 15:10

25-Apr-07 15:10

ok frist of all ..iam sorry bout my behavior but save & open its apart of very very huge program ..the dead line after 5 hours..so thank god i didnt kill my some one ..
ok the error at ...:
StreamWriter streamWriter=new StreamWriter(outStream);
plzz if u know more simple code..i will invite u to cinema..kidding!! OMG | :OMG:

Christian Graus25-Apr-07 15:14

25-Apr-07 15:14

Building the string and using WriteAllText is definately simpler.

I don't get the error, because, like I said, it compiled fine here.

mr jets25-Apr-07 15:19

25-Apr-07 15:19

and using WriteAllText is definately simpler..iam not familiar with that..how will be the code look like..?! D'Oh! | :doh:

mr jets25-Apr-07 16:21

Integer/Decimal control in Windows Froms

25-Apr-07 16:21

ok i give up ..i really need ur help bro..its apart of my code..where is the wrong ?!

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;

namespace graphics_practis
{
///

/// Summary description for Form1.
///

public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.Button line;
private System.Windows.Forms.Button square;
private System.Windows.Forms.Button circle;
private System.Windows.Forms.Button ellipse;
private System.Windows.Forms.Button polygon;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button ok;
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem menuItem2;
private System.Windows.Forms.MenuItem menuItem3;
private System.Windows.Forms.MenuItem menuItem4;
private System.Windows.Forms.MenuItem menuItem5;

private BinaryFormatter formtter = new BinaryFormatter();
private FileStream str_reader;

private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;

private System.Windows.Forms.SaveFileDialog saveFileDialog1;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
///

/// Required designer variable.
///

private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
dr = new draw(this.pictureBox1);
}
static void Main()
{
Application.Run(new Form1());
}

private void menuItem4_Click(object sender, System.EventArgs e)
{
//saving
FileStream outStream=File.Create(saveFileDialog1.FileName);//To create text file
Stream streamWriter=new StreamWriter(outStream);
}
private void menuItem3_Click(object sender, System.EventArgs e)
{
//opening
FileStream outStream=File.Create(saveFileDialog1.FileName);//To create text file
StreamWriter streamWriter=new StreamWriter(outStream);
}

Nooie25-Apr-07 13:59

Nooie

25-Apr-07 13:59

Am I going mad? Is there a control just for integer or decimal values?

I have a form that is purely based on "controls" for decimal that result in Un-Editable "controls" as decimal results.

The thing that concerns me is the amount of casting/parsing I am doing. Taking a text entry, parsing to decimal, doing my math then parsing back to decimal again to show in the results box.

There is the numeric up/down control. But can you remove the up/down part of it to use it as a purely numeric control?

Much appreciated

Tony

Re: Integer/Decimal control in Windows Froms

Christian Graus25-Apr-07 14:21