C# Discussion Boards - CodeProject

sudhi16419-Jun-09 20:17

19-Jun-09 20:17

hi,

i have a Ip address and i want to change it into Variant VT_I4 and then change type to VT_BSTR in .net. Let me know how to do it

Re: IP address in to varient

Christian Graus19-Jun-09 20:22

Christian Graus

19-Jun-09 20:22

There is no variant in .NET. You could try to use an object instead. I googled for you and couldn't find any better advice.

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

Getting Message: "Couldn't Update; Currently Locked" in mdb

honeyashu19-Jun-09 20:03

honeyashu

19-Jun-09 20:03

Hi,
I am developing an application in which i use to select data from one grid remove that & display it to the second grid.
I store those data in a local mdb file . when i am selecting rows in bulk(around 50-70 at a time)and then wanted to cut and display in the second grid i am getting this error .
Please help.

Re: Getting Message: "Couldn't Update; Currently Locked" in mdb

Christian Graus19-Jun-09 20:07

Christian Graus

19-Jun-09 20:07

The error means what it says. Your code is locking the MDB. Not sure what sort of help you're hoping for, when you don't post any code.

getting the parent control from a child control at runtime.

Xandip19-Jun-09 19:32

Xandip

19-Jun-09 19:32

hi there,
I have a simple WPF window with a button in it.
now during runtime, i pass this button control to another function, and there, i want to know the parent of this control. ie the window, with the full namespace.
any way for this thru C#

The name is Sandeep

Re: getting the parent control from a child control at runtime.

Christian Graus19-Jun-09 19:46

Christian Graus

19-Jun-09 19:46

We have a WPF forum. The control has a parent property, to know the type, you can use the GetType method, you can also use reflection. Any method that gets passed a control, sounds a little ugly to me.

Re: getting the parent control from a child control at runtime.

Xandip19-Jun-09 19:50

Xandip

19-Jun-09 19:50

hi,
thnx for the reply..

The name is Sandeep

Selecting Color Scheme from withing app

Nigel Mackay19-Jun-09 19:03

Nigel Mackay

19-Jun-09 19:03

Hi
Because of various graphics that i use in my app, I want my app to run under Windows Classic Theme regardless of the theme the user has selected before they run my app.

Where can I find info about the API calls I need to swtich tmeme at start up and to restore to users' chosen theme on exit?

Thanks.

Re: Selecting Color Scheme from withing app

Christian Graus19-Jun-09 19:45

Christian Graus

19-Jun-09 19:45

Swapping the whole system theme is a little user hostile. It would be better to skin your app to make it look the way you want.

Re: Selecting Color Scheme from withing app

Nigel Mackay19-Jun-09 20:49

Nigel Mackay

19-Jun-09 20:49

That's basically what I want to do, but using Windows Classic Theme for the skin instead of a custom skin, but didn't think of it that way.

Now all I have to do is find out how to do it - there are a lot of articles about skinning, so it is difficult to find the best article to look at.

Open link in new Tab when Mouse Middle Click...

Baeltazor19-Jun-09 18:36

Baeltazor

19-Jun-09 18:36

Hi All

I'm working on a little web browser that supports tabs and all is good but everytime I click a link that is supposed to open in a new tab or window, instead of opening a new window/tab in my own web browser that i am making, it chooses to open a new instance of the system's default web browser (Internet Explorer) and I have tried to find some articles/samples on the web but have been unsuccessful.

Does anybody know how I would go about allowing links to be opened in a new tab in the browser i am making?

Any suggestions would be greatly appreciated

thanks
jason

Re: Open link in new Tab when Mouse Middle Click...

Christian Graus19-Jun-09 19:44

Christian Graus

19-Jun-09 19:44

Well, unless I misse the memo ( possible ), the web browser control doesn't support tabs. So, you'd have to catch the event of a page opening, swallow it, and create your own tab, and open the URL there.

Re: Open link in new Tab when Mouse Middle Click...

Baeltazor19-Jun-09 21:25

Baeltazor

19-Jun-09 21:25

thanks christian, that's exactly what i'm trying to figure out, i obviously didn't explain my situation properly in my first message, sorry. I'll keep looking Smile | :)

Re: Open link in new Tab when Mouse Middle Click...

Christian Graus19-Jun-09 21:56

Christian Graus

19-Jun-09 21:56

http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser_members.aspx[^]

Reading the MSDN, it looks like the NewWindow[^] event is what you want.

Re: Open link in new Tab when Mouse Middle Click...

Baeltazor19-Jun-09 22:33

Baeltazor

19-Jun-09 22:33

Thank you Christian for yout time and help, that link was very useful. I'm actually wondering how I could've overlooked that page in the first place.

Well, I am now browsing the web with full tab support yay! Thanks again christian. Maybe I could turn this into an article??

Re: Open link in new Tab when Mouse Middle Click...

Christian Graus19-Jun-09 22:46

Christian Graus

19-Jun-09 22:46

Well, if you finish the project, then I'd imagine you could write an article which covers this and other things you learned along the way. People are always writing their own browsers, so I'm sure it would be well recieved.

Re: Open link in new Tab when Mouse Middle Click...

Baeltazor19-Jun-09 22:52

Baeltazor

19-Jun-09 22:52

I'm planning on adding a new type of favorites system, but also supporting existing favorites that have been created by other browsers, once that's finished I'll start writing the article. I'd love to see what others have to say about it.

About string ,and help me to solution one problom about zhe value and reference type! Thank you！ [modified]

gjllyl19-Jun-09 14:40

gjllyl

19-Jun-09 14:40

hi,
zhe subject is that
class Class1 {
private string str = "class1.str";
private int i = 0;
static void StringConvert(string str) {
str = "string being converted.";
}
static void StringConvert(Class1 c) {
c.str = "string being converted.";
}
static void Add(int i) {
i++;
}
static void AddWithRef(ref int i) {
i++;
}
static void Main() {
int i1 = 10;
int i2 = 20;
string str = "str";
Class1 c = new Class1();
Add(i1);
AddWithRef(ref i2);
Add(c.i);
StringConvert(str);
StringConvert(c);
Console.WriteLine(i1);
Console.WriteLine(i2);
Console.WriteLine(c.i);
Console.WriteLine(str);
Console.WriteLine(c.str);
Console.Read();
}
tell me why "Console.WriteLine(str);" and "Console.WriteLine(c.str);"
zhe two sentence have two different results!
I know that zhe "string" is reference type!
but here i am puzzled!

modified on Saturday, June 20, 2009 8:09 AM

Re: About string ,and help me to solution one problom about zhe value and reference type! Thank you！

Gideon Engelberth19-Jun-09 17:31

Gideon Engelberth

19-Jun-09 17:31

While you are correct that string is a reference type, you cannot change which string the local variable str in Main is referencing from the StringConvert function since you pass it by value. All you can do is make the parameter to StringConvert refer to another string, which will have no effect outside the function.

In the case where you passed a Class1, you are modifying the reference contained in the object referred to by the parameter, which is the same object referred to in Main. If you had put the line c = new Class1(); as the first line in StringConvert, it would no longer change the value in Main because the parameter in StringConvert would now be referring to a different object.

send mail using c#

sahandshokri19-Jun-09 11:42

sahandshokri

19-Jun-09 11:42

i want to send mail to yahoo mail automatically using c# code.

Re: send mail using c#

blackhattrick19-Jun-09 11:46

blackhattrick

19-Jun-09 11:46

Here is your answer... Smile | :)

[^]

Re: send mail using c#

Christian Graus19-Jun-09 12:42

Christian Graus

19-Jun-09 12:42

I want a Porche.....

Seriously, what have you tried ? Why do you have a specific issue with yahoo mail ? A quick google leads me to believe that a lot of people are asking this, so perhaps the issue is that yahoo does not support sending mail through a third party, or through the protocols that .NET supports.

Re: send mail using c#

rishavraj19-Jun-09 23:55

rishavraj

19-Jun-09 23:55

Yahoo doesnt provide free smtp/pop3 service so you cannot use your Yahoo id to send mails from any other email client.
To use Yahoo mail you wil have to buy the Pop3 Service from yahoo.

Rishav Raj
http://hashtech.erishav.com

System.Security.SecurityException

lump1067019-Jun-09 11:25

lump10670

19-Jun-09 11:25

I have an application I made that simply gets the current directory using System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location goes up a directory level and then runs a file in that directory using System.Diagnostics.ProcessStartInfo and System.Diagnostics.Process.Start. The file works fine if I run it on my computer but if I put the file on a Shared Network Path I get the below error:

Unhandled Exception: System.Security.SecurityException: Request failed.

at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly a

sm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, Secur

ityAction action, Object demand, IPermission permThatFailed)

at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Object ass

emblyOrString, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle

rmh, SecurityAction action, Object demand, IPermission permThatFailed)

at System.Security.CodeAccessSecurityEngine.CheckSetHelper(PermissionSet gran

ts, PermissionSet refused, PermissionSet demands, RuntimeMethodHandle rmh, Objec

t assemblyOrString, SecurityAction action, Boolean throwException)

at System.Security.CodeAccessSecurityEngine.CheckSetHelper(CompressedStack cs

, PermissionSet grants, PermissionSet refused, PermissionSet demands, RuntimeMet

hodHandle rmh, Assembly asm, SecurityAction action)

at Setup.Program.Main(String[] args)

The action that failed was:

LinkDemand

The type of the first permission that failed was:

System.Security.PermissionSet

The demand was for:

<PermissionSet class="System.Security.PermissionSet"

version="1"

Unrestricted="true"/>

The granted set of the failing assembly was:

<PermissionSet class="System.Security.PermissionSet"

version="1">

<IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib,

Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Read="USERNAME"/>

<IPermission class="System.Security.Permissions.FileDialogPermission, mscorlib,

Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Unrestricted="true"/>

<IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Vers

ion=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Read="T:\ClientUpdate\"

PathDiscovery="T:\ClientUpdate\"/>

<IPermission class="System.Security.Permissions.IsolatedStorageFilePermission, m

scorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Allowed="AssemblyIsolationByUser"

UserQuota="9223372036854775807"

Expiry="9223372036854775807"

Permanent="True"/>

<IPermission class="System.Security.Permissions.ReflectionPermission, mscorlib,

Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Flags="ReflectionEmit"/>

<IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Ve

rsion=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Flags="Assertion, Execution, BindingRedirects"/>

<IPermission class="System.Security.Permissions.UIPermission, mscorlib, Version=

2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Unrestricted="true"/>

<IPermission class="System.Security.Permissions.UrlIdentityPermission, mscorlib,

Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Url="file:///T:/ClientUpdate/Setup.exe"/>

<IPermission class="System.Security.Permissions.ZoneIdentityPermission, mscorlib

, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"

version="1"

Zone="Intranet"/>

<IPermission class="System.Net.DnsPermission, System, Version=2.0.0.0, Culture=n

eutral, PublicKeyToken=b77a5c561934e089"

version="1"

Unrestricted="true"/>

<IPermission class="System.Drawing.Printing.PrintingPermission, System.Drawing,

Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"

version="1"

Level="DefaultPrinting"/>

</PermissionSet>

The assembly or AppDomain that failed was:

Setup, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

The Zone of the assembly that failed was:

Intranet

The Url of the assembly that failed was:

file:///T:/ClientUpdate/Setup.exe

Any ideas on how to fix this?

Re: System.Security.SecurityException

Christian Graus19-Jun-09 11:34

Christian Graus

19-Jun-09 11:34

Obviously, if it can be fixed at all, then it requires you to set the right permissions on your intranet.

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