Re: How to set the TIMEOUT property of WebClient class??? - C# Discussion Boards

Re: Creating a deep copy of an ArrayList

8-Apr-03 6:41

Hi All,

Is there any easy way to create a deep copy of an ArrayList? If I use the ='s it seems to create a shallow copy and it's the same deal with the Clone method of the ArrayList. Is there some other function that I can use to create a deep copy?

Thanks again

- monrobot13

Daniel Turini8-Apr-03 6:54

Daniel Turini

8-Apr-03 6:54

The quickest way, if you don't need top performance, is: serialize it and deserialize it.

It's not the fall that kills you: it's the sudden stop - Down by Law, Jim Jamursch (1986)

Re: Creating a deep copy of an ArrayList

monrobot138-Apr-03 7:27

How to set the TIMEOUT property of WebClient class???

8-Apr-03 7:27

Kinda new to C# so could you explain how you serialize and deserialize an ArrayList?

Thanks for the reply.

- monrobot13

Small Rat8-Apr-03 6:35

Small Rat

8-Apr-03 6:35

I use C# to develop a web embed application, and I find that using WebClient is very easy to raise a web request and get the response. But I don' know how to set the TIMEOUT property(or something like that) to prolong the request time.

Re: How to set the TIMEOUT property of WebClient class???

Chris Jobson8-Apr-03 8:46

Re: How to set the TIMEOUT property of WebClient class???

8-Apr-03 8:46

The System.Net.WebRequest class has a Timeout property, which is a value in milliseconds or System.Threading.Timeout.Infinite. See http://www.dotgnu.org/pnetlib-doc/System/Net/WebRequest.html[^] for more details of the class.

Chris Jobson

Small Rat8-Apr-03 13:03

Small Rat

8-Apr-03 13:03

You mean I cann't use WebClient anymore(I have to use WebRequest and WebResponse instead)????
Do you know some resolution that can extend the functionality of WebClient and realize the function I need?

Tnanks.

Re: How to set the TIMEOUT property of WebClient class???

Chris Jobson9-Apr-03 7:58

Re: system.web.mail question

9-Apr-03 7:58

Sorry, I thought that WebClient had a way to access the WebRequest that it was using internally - but I was wrong, so maybe you will have to use WebRequest/WebResponse Frown | :(

The only other idea I have is that if you know in advance the URLs you will be accessing you could use WebRequest.RegisterPrefix to register a class of your own (for just the URL you want) that implements the IWebRequestCreate interface, and that class could return an instance of one of the standard WebRequest objects (e.g. an HttpWebRequest) with the timeout set to whatever you want. See the web page I referenced in my previous answer for more details. However, I must stress that I haven't tried this, and it's based only on my understanding of the information on the www.dotgnu.org website.

Good luck!

Chris Jobson

system.web.mail question

ekuhner8-Apr-03 6:00

ekuhner

8-Apr-03 6:00

Hello All,

I am trying to do this:

using System.Web.Mail;

and Visual Studio tells me that:
The type or namespace name 'Mail' does not exist in the class or namespace 'System.Web' (are you missing an assembly reference?)

What am I missing here?

Thanks!

Ed

Jody Bell8-Apr-03 9:28

Jody Bell

8-Apr-03 9:28

ekuhner wrote:
using System.Web.Mail;

Hi,

You have to add a reference to System.Web.dll before you can access the namespace.

jody

Re: system.web.mail question

Leon van Wyk10-Apr-03 2:09

Leon van Wyk

10-Apr-03 2:09

Under your references in your solutions explorer (right click) add a new reference to System.Web

That will help!

Leon v Wyk

Formating the xml-output from a DataSet

Knappen8-Apr-03 5:33

Knappen

8-Apr-03 5:33

Helo

I know that I have done this before, controling how the output-xml is formated.

The default i:

<NewDataSet>
 <table>
  <col1>val</col1>
  <col2>val</col2>
 </table>
 <table>
  <col1>val</col1>
  <col2>val</col2>
 </table>
<NewDataSet>

But I want it to be:

<NewDataSet>
  <table col1="val" col2="val">
  <table col1="val" col2="val">
</NewDataSet>

What is the property to set ????

Re: Formating the xml-output from a DataSet

Le centriste8-Apr-03 6:11

Le centriste

8-Apr-03 6:11

Do you have a schema? You need one to achieve this.

In VS, open the <yourschema>.xsd file,and click on DataSet tab at the bottom. You will see a table named table (as your example) and the columns with their types. You will see in the first column an E, change it to an A and there you go.

If you don't have a schema, simply build by hand a XML file that will look like what you want. Open it with VS and choose, from the XML menu, Create Schema.

In your program, before loading the DataSet with data from an XML file, or before saving to an XML file, use one of the myDataSet.ReadXmlSchema methods. When reading, always use the XmlReadMode.Auto and maybe set the myDataSet.EnforceConstraints property to true to detect any schema errors.

Have fun!

Re: Formating the xml-output from a DataSet

Bruce Duncan9-Apr-03 1:19

Bruce Duncan

9-Apr-03 1:19

You can set the ColumnMapping property on each column to MappingType.Attribute.

Without nipples, breasts would be pointless.

Re: Formating the xml-output from a DataSet

Knappen9-Apr-03 3:36

Knappen

9-Apr-03 3:36

:-DGreat!
That was the best and eazyest solution.
To solve it with XMLSchema created alot of overhead and
puluted the xml with alot of xmlns-information...

ListBox and DataSource

mkomasi8-Apr-03 4:52

mkomasi

8-Apr-03 4:52

Hi,

I have two lists (A and B).I want to add some items from A to B and remove the items from A. I've used two ListBoxes for this situation.

I want to display Name of items and for adding and removing I have to know ID of each item. So I use ListBox.DataSource to fill items. First I define a class:

<br />
	public class USState<br />
	{<br />
		private string myShortName ;<br />
		private string myLongName ;<br />
   <br />
		public  USState(string strLongName, string strShortName)<br />
		{<br />
<br />
			this.myShortName = strShortName;<br />
			this.myLongName = strLongName;<br />
		}<br />
<br />
		public string ShortName<br />
		{<br />
			get<br />
			{<br />
				return myShortName;<br />
			}<br />
		}<br />
<br />
		public string LongName<br />
		{<br />
      <br />
			get<br />
			{<br />
				return myLongName ;<br />
			}<br />
		}<br />
<br />
		public override string ToString()<br />
		{<br />
			return this.ShortName + " - " + this.LongName;<br />
		}<br />
	}<br />

Then for filling list items :

<br />
	ArrayList USStatesA = new ArrayList()   ;<br />
	ArrayList USStatesB = new ArrayList()   ;<br />
	USStatesA.Add(new USState("Alabama", "AL"));<br />
	USStatesA.Add(new USState("Washington", "WA"))  ; <br />
	USStatesA.Add(new USState("West Virginia", "WV"));<br />
	USStatesA.Add(new USState("Wisconsin", "WI")) ;<br />
	USStatesB.Add(new USState("Wyoming", "WY"));<br />
<br />
	ListBoxA.DisplayMember = "LongName"     ;<br />
	ListBoxA.ValueMember = "ShortName" ;<br />
	ListBoxA.DataSource = USStatesA ;<br />
<br />
	ListBoxB.DisplayMember = "LongName"     ;<br />
	ListBoxB.ValueMember = "ShortName" ;<br />
	ListBoxB.DataSource = USStatesB ;<br />

Everything is OK by above codes. But the problem is: When I Remove an object from ListBoxA and then Add it to ListBoxB; no changes will be appear in ListBoxA.Items or ListBoxB.Items .

How can I update ListBox Items same as its DataSource updated?

regards,
Mehdi

Re: ListBox and DataSource

Chris Jobson8-Apr-03 8:24

Re: ListBox and DataSource

8-Apr-03 8:24

One method that will work is to invoke the Refresh method of the Currencymanager objects involved, e.g. after you've moved an object from one ArrayList to the other:

CurrencyManager cm = BindingContext[USStatesA] as CurrencyManager;<br />
if (cm != null) cm.Refresh();<br />
cm = BindingContext[USStatesB] as CurrencyManager;<br />
if (cm != null) cm.Refresh();

A nicer method might be to wrap the ArrayLists (or derive from them) in an object of your own which implements the IBindingList interface. This allows an event to be raised when the list is changed, and I assume that the CurrencyManager traps this event and automatically updates the bound controls (but this is based only on my understanding of the documentation - I haven't tried it Unsure | :~

).

Chris Jobson

mkomasi8-Apr-03 19:12

mkomasi

8-Apr-03 19:12

Thanks Chris.
I think I didn't write the problem clearly. I tell you it again.

I write below method to remove an item from ListBoxA and add it to ListBoxB:

<br />
void TransferItem()<br />
{<br />
	object SelectedObject = ListBoxA.SelectedItem;<br />
	((ArrayList)ListBoxA.DataSource).Remove(SelectedObject);<br />
	((ArrayList)ListBoxB.DataSource).Add(SelectedObject);<br />
}<br />

By this method the DataSource of ListBoxA and ListBoxB has been changed, but no changes will be appear in ListBoxA.Items and ListBoxB.Items .
I couldn't change the Items directly because of using DataSource for ListBoxes.
Can you help me please.

Mehdi

Re: ListBox and DataSource

Chris Jobson9-Apr-03 8:03

Adding a progressbar to a statusbar

9-Apr-03 8:03

Mehdi,

If you add the code I gave, or the following modified version of it, at the end of the TransferItem method in your previous posting it should work:

CurrencyManager cm = BindingContext[ListBoxA.DataSource] as CurrencyManager;<br />
if (cm != null) cm.Refresh();<br />
cm = BindingContext[ListBoxB.DataSource] as CurrencyManager;<br />
if (cm != null) cm.Refresh();

Chris Jobson

monrobot138-Apr-03 4:50

8-Apr-03 4:50

Hi there,

Is it possible to add a ProgressBar control to a status bar or do you simply have to make the status bar panel owner drawn?

Thanks in advance

- monrobot13

Chris Austin8-Apr-03 5:37

Chris Austin

8-Apr-03 5:37

Hi, I may be mistaken but I think that you cannot place controls into a StatusBar control in the designer. However, you can add any number of Controls to the StatusBar programatically through it's Controls property.

Hope this helps

Hey don't worry, I can handle it. I took something. I can see things no one else can see. Why are you dressed like that?
- Jack Burton

monrobot138-Apr-03 6:42

8-Apr-03 6:42

Thanks Chris! I'll give it a try.

// Edit

Gave it a try. It works...the problem is that is always inserts the progressbar as the very first item on the statusbar. I tried using the SetChildIndex method of the Controls collection but it had no effect. Any ideas?

- monrobot13

Thomas Freudenberg8-Apr-03 13:55

Thomas Freudenberg

8-Apr-03 13:55

Try writing a StatusBarPanel derived class as described in http://www.dotnet247.com/247reference/msgs/20/102483.aspx[^]

Regards
Thomas

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