Re: HttpWebResponse - C# Discussion Boards

Pete O'Hanlon12-Feb-12 22:34

12-Feb-12 22:34

When you are trying to get something working based on an article, the best place to ask questions is on the forum for that article. There's precious little chance that an author will happen on by and pick up a question in an unrelated forum.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

HttpWebResponse

tatulea12-Feb-12 20:07

tatulea

12-Feb-12 20:07

Hello!I have a problem.I try to make a program which when I press a button my program execute this:

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();

The problem is when the url is not valid my program is blocking at this sequence: HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();

What can I do for my program show me a message when the url is not valid?

Re: HttpWebResponse

Bernhard Hiller12-Feb-12 20:46

Bernhard Hiller

12-Feb-12 20:46

What does "the url is not valid" mean?
When I try string url = "http://www.google.con";, I receive a DNS error ("could not resolve name").
When I try string url = "http://www.google.com/blah.php";, I receive error 404 ("not found").
I do not know the URL you tried. Try waiting for some time (about a minute), and see if you run into a tme-out. In any case, you should get an exception telling the reason.

Re: HttpWebResponse

tatulea12-Feb-12 21:02

tatulea

12-Feb-12 21:02

More exactly i try the url that contain the port. Big Grin | :-D

Re: HttpWebResponse

Shameel13-Feb-12 4:44

Shameel

13-Feb-12 4:44

Enclose the code in a try catch block and log the Exception message. You'll know why your call failed after the call times out.

Re: HttpWebResponse

tatulea13-Feb-12 5:07

tatulea

13-Feb-12 5:07

i tried this but if the url not exist first the program is blocking for 20 seconds and after give me a message :"Unable to connect to the remote server".

Re: HttpWebResponse

Shameel13-Feb-12 7:53

Shameel

13-Feb-12 7:53

That's the correct behavior. What else you want it to do?

Re: HttpWebResponse

fjdiewornncalwe13-Feb-12 8:38

fjdiewornncalwe

13-Feb-12 8:38

That's the error that Shameel is talking about.
If the url is being entered at runtime by the user and you want to validate the url before trying it, then there is no really simple way to do this. In this case you would have to write a validation method before you try the url.
Otherwise, the suggestion you have received already is the correct one.

I wasn't, now I am, then I won't be anymore.

Re: HttpWebResponse

tatulea13-Feb-12 22:13

tatulea

13-Feb-12 22:13

I want if the url is not valid the program skip quickly over this sequence.i want the program doesn't blocking

Re: HttpWebResponse

BobJanova13-Feb-12 22:29

BobJanova

13-Feb-12 22:29

Then you need to run the web request in a background thread (or BackgroundWorker or Task).

Re: HttpWebResponse

tatulea13-Feb-12 23:40

tatulea

13-Feb-12 23:40

This a good idea!I will try this.Thanks

how to change link color on datagridview by code

goldsoft12-Feb-12 19:37

goldsoft

12-Feb-12 19:37

hi i have in my C# WinForm program DataGridView
i need to change the text color of any cell by code.
i try this:

dataGridView8[0, rowCounter].Style.ForeColor = Color.Red;

but it dosnt work

how to do it ?

thanks in advance

modified 13-Feb-12 2:12am.

Re: how to change link color on datagridview by code

Mycroft Holmes12-Feb-12 20:02

Mycroft Holmes

12-Feb-12 20:02

Identify the Cell and change it's ForeColor.

Cell.ForeColor = "Red";

Never underestimate the power of human stupidity
RAH

Re: how to change link color on datagridview by code

goldsoft12-Feb-12 20:14

goldsoft

12-Feb-12 20:14

i try this:

dataGridView8[0, rowCounter].Style.ForeColor = Color.Red;
but it dosnt work

Re: how to change link color on datagridview by code

Mycroft Holmes12-Feb-12 21:26

Mycroft Holmes

12-Feb-12 21:26

This worked for me.

private void btnGC_Click(object sender, EventArgs e)
		{
			List<string> lData = new List<string>();

			lData.Add("this one");
			lData.Add("this one");
			lData.Add("this one");
			lData.Add("this one");
			lData.Add("this one");
			lData.Add("this one");
			lData.Add("this one");

			this.dataGridView1.DataSource = lData;

			this.dataGridView1[0, 3].Style.ForeColor = Color.Red;

		}

Never underestimate the power of human stupidity
RAH

Re: how to change link color on datagridview by code

goldsoft12-Feb-12 22:33

goldsoft

12-Feb-12 22:33

thanks for the help, but the color dosent change

Re: how to change link color on datagridview by code

Mycroft Holmes13-Feb-12 0:18

Mycroft Holmes

13-Feb-12 0:18

Then there must be another issue, that code above changes the colour of the text in the specified cell!

Never underestimate the power of human stupidity
RAH

Re: how to change link color on datagridview by code

GenJerDan13-Feb-12 3:49

GenJerDan

13-Feb-12 3:49

I'm wondering if the Subject is correct and pointing to the problem... If there's a hyperlink in the cell, would changing the Forecolor affect it, or is it going to default to the default hyperlink color?

No dogs or cats are in the classroom.

My Mu[sic]
My Films
My Windows Programs, etc.

Writing Text on Panel

Danzy8312-Feb-12 14:35

Danzy83

12-Feb-12 14:35

Hi everyone! I am trying to write a string of text on Panel control modeled like a sheet of paper. There is no limit to the length of the text which means that I may need three of four or more of the sheets.

I am now facing a problem of knowing the last line of the text for a page so that if there are more words, I can add another sheet and write the rest of the text. I'm fighting with how to determine the point in the full text at which a page will be full so that I can create another sheet and add the rest of the text to the new sheet. Any ideas please. Thanks in advance.

Re: Writing Text on Panel

Luc Pattyn12-Feb-12 15:56

Luc Pattyn

12-Feb-12 15:56

Assuming this is a WinForms Panel you're talking about, and you are drawing text using Graphics.DrawString(), then what you need to look at is Graphics.MeasureString()

Given the right parameters, it will predict how much area DrawString is going to need to paint a string.

Smile | :)

Luc Pattyn [My Articles] Nil Volentibus Arduum

Fed up by FireFox memory leaks I switched to Opera and now CP doesn't perform its paste magic, so links will not be offered. Sorry.

rdcl report tablix

zigzagooo12-Feb-12 11:33

zigzagooo

12-Feb-12 11:33

hi guys ....

i am having a report includes tablix "matrix" with row and column groups in the body of the report. I want to align the tablix at the center of the report after loading the data from my dataset.

another question:

my report always displayed in 2 pages whlie the 2nd page is empty "only header and footer are displayed" i tried 2 rezise every thing smaller but its already fits one page.

how to export contents datagridview to an XML file

nassimnastaran12-Feb-12 8:34

nassimnastaran

12-Feb-12 8:34

Hi All !
I want to save the content(Row And Column Cell) from a DatGridView To A XML file .how can i do it ?
thanks in advance for any Help !

Re: how to export contents datagridview to an XML file

Abhinav S12-Feb-12 19:17

Abhinav S

12-Feb-12 19:17

If you DataGridView has a datasource, then simply use the WriteXml property[^]. This[^] explains the same process with code.

Re: how to export contents datagridview to an XML file

nassimnastaran13-Feb-12 4:06

nassimnastaran

13-Feb-12 4:06

thanks , but there is no database or datasource for DataGridView , the user fill only the cells and I want to save this to an XML File .
thanks
RGDS!

Re: how to export contents datagridview to an XML file

nassimnastaran14-Feb-12 7:11

nassimnastaran

14-Feb-12 7:11

Here is my code , plz help me !

SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.Filter = "Xml files (*.xml)|*.xml";
saveDialog.FilterIndex = 2;
saveDialog.RestoreDirectory = true;
saveDialog.InitialDirectory = "d:\\";
saveDialog.FileName = "XML File";
saveDialog.Title = "XML Export";

if (saveDialog.ShowDialog() == DialogResult.OK)
{
    string OutPutXMLFile = "";
    System.Xml.XmlDocument XMLDoc = new System.Xml.XmlDocument();
    for (int i = 0; i < DataGridView1.Rows.Count; i++)
    {
        OutPutXMLFile = "";
        for (int j = 0; j < DataGridView1.Columns.Count; j++)
            OutPutXMLFile += String.Format("{0:0.00}", DataGridView1.Rows[i].Cells[j].Value);
        XMLDoc.CreateElement(OutPutXMLFile);

    }
}

but I've got an Error to create a xml file !
thanks !

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