.NET (Core and Framework)

Re: GetSystemMetric(SM_NETWORK) returns alwas 3 as the value!!!

11-Mar-09 4:18

hi

value returned from the API GetSystemMetrics(SM_NETWORK) is always 3 for me.
Wat does it mean
i have seen fromthe msdn that the SM_NETWORK is used to identify whether the system has network connection or not. Least significant bit is set if the system has network coonection or else it will clear that bit.

but i am gettign value as 3.. What is the reason for it ?
thanks

Dave Kreskowiak11-Mar-09 4:31

"Method Not Allowed" 405 On 2003 SP2

11-Mar-09 4:31

The only bit that's documented is the least significant. Other bits in the return value may or may not be set, but there is no documentation on what they mean.

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Lior Zat9-Mar-09 22:14

Lior Zat

9-Mar-09 22:14

Hey guys, what's up?

I have this web service I wrote which works perfectly fine when run on Windows Server 2003 with SP1. However, when I run the same thing on Windows Server 2003 with SP2, I get "Method not Allowed" 405 http error.

Anyone knows what might cause this?

Thanks,
Lior

Re: "Method Not Allowed" 405 On 2003 SP2

Dave Kreskowiak10-Mar-09 1:26

Re: "Method Not Allowed" 405 On 2003 SP2

10-Mar-09 1:26

Google results for "Method not allowed" 405[^].

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

led mike10-Mar-09 4:47

led mike

10-Mar-09 4:47

At this point most of us should also receive like a Google MVP award. I mean besides harassing these dim wits it's about the only other thing I do around here any more.

Appending the ToolboxItem.DependentAssemblies property

astibich29-Mar-09 11:04

astibich2

9-Mar-09 11:04

I am writing a Visual Studio 2008 Tool Window plugin that exposes a custom toolbox. I create controls on Forms using the 'ToolboxItem' class. I would like to append to the ToolboxItem dependencies, such that my assembly will be auto-inserted as a reference after the control creation. Here's an example of what I'm trying to do:

ToolboxItem tbi = new ToolboxItem(typeof(CheckBox));

AssemblyName[] depends = tbi.DependentAssemblies;
List<assemblyname> listDepends = new List<assemblyname>();
listDepends.AddRange(depends);

listDepends.Add(new AssemblyName("MyAssembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=e7d025b3483b4afc"));

tbi.DependentAssemblies = listDepends.ToArray();

The control gets created fine, but 'MyAssembly' is not added to the project references. 'MyAssembly' is installed in the GAC - I've double checked that the full path is correct.

Thanks,

Aaron

Re: Appending the ToolboxItem.DependentAssemblies property

0x3c09-Mar-09 11:55

0x3c0

9-Mar-09 11:55

AFAIK, this isn't possible. Imagine what would happen if a malicious application injected itself as a dependency into the Form class. Load Form class = load malicious application into memory = bad in one way or another

The best thing you could do would be making a derived class, and add your assembly as a reference

Bug in DataTable ReadXml causes spaces to be ignored

calhuskerfan9-Mar-09 6:37

calhuskerfan

9-Mar-09 6:37

I found this one the hard way, http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=295677[^]. After writing and testing a bunch of code that relied on reading from persisted DataTables one of our test databases had columns with single spaces. While this post discusses .NET 3.0 I am seeing the behavior in .NET 2.0. I have not tested to see if it is fixed in any later versions.

However, if I read the same file, which is still persisted with a DataTable object (DataTable.WriteXml()), into a DataSet object instead and use the first DataTable in the DataTableCollection the whitespace is [appears to be, for me anyway] preserved properly in the DataTable

DataSet someData = new DataSet();
someData.ReadXml("somepersistedDataTable.xml");
//
DoSomethingToDataTable(someData.Tables[0]);
//
void DoSomethingToDataTable(DataTable dt)
{
}

Not sure if this is the correct place, or a repost for that matter, but wanted to share just in case someone else was having similar issues.

GlobalMemoryStatus() return negative value like -

CoolCoder_New9-Mar-09 1:35

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 1:35

Hi all,

i am retrieving total physical memory using GlobalMemoryStatus() as follows :

public struct MemoryStatus
{
public uint Length; //Length of struct
public uint MemoryLoad; //Value from 0-100 represents memory usage
public uint TotalPhysical;
public uint AvailablePhysical;
public uint TotalPageFile;
public uint AvailablePageFile;
public uint TotalVirtual;
public uint AvailableVirtual;

}
MemoryStatus stat;

[DllImport("kernel32.dll")]
public static extern void GlobalMemoryStatus(out MemoryStatus stat);

GlobalMemoryStatus(out stat);
uint totPhy = stat.TotalPhysical;

My question is
1) Is the stat.TotalPhysical return the actual physical memory installed int he machine ?

2) I am getting neagtive value like -271691776 for the vista mahcine(Os type : 6.0.6001) and Windows Server 2000 .

Can someone please help me out.Thanks in advance

Luc Pattyn9-Mar-09 3:02

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 3:02

Hi,

I suggest you switch to GlobalMemoryStatusEx() and MemoryStatusEx (with "long" members)
since IIRC the old ones don't cope with memory sizes beyond 2GB.

Smile | :)

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Dave Kreskowiak9-Mar-09 3:16

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 3:16

On top of what Luc said, you say you got negative numbers?? How?? Since unsigned integers can't return negative numbers, you had to use some calculation that introduced them. This says that your methodolgy is wrong.

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

CoolCoder_New9-Mar-09 3:45

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 3:45

GlobalMemoryStatus(out stat);
usrSysInfo.totalPhysicalMemory =(UInt32)IPAddress.NetworkToHostOrder((int)stat.TotalPhysical);

tempArray = BitConverter.GetBytes(usrSysInfo.totalPhysicalMemory);
SysInfoMemStream.Seek(offset, SeekOrigin.Begin);
SysInfoMemStream.Write(tempArray, 0, sizeof(UInt32));
offset += sizeof(UInt32);

I am converting the data to NetworktoHostOrder and convert to byte and trasfer it to the server. Server will do reverse process and get the actual data..

I dont know how the RAM value is in negative.
Similary i want to know whether the GLobalMemoryStatusEx method returns the actuall RAM isntalled in the machine or the RAM available to the users.

Luc Pattyn9-Mar-09 3:55

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 3:55

Hi,

GLobalMemoryStatusEx returns physical memory, with a few MB deducted for unknown reasons (same thing occurs in Task Manager, it shows 3069MB for 3GB !)

Smile | :)

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CoolCoder_New9-Mar-09 4:23

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 4:23

but why its returning negative junk value instead of -1 ???

Luc Pattyn9-Mar-09 4:29

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 4:29

If a function returns a value you don't like, the most likely cause is you did something wrong. In this case, did you set the Length member of the struct correctly? It is different for
MemoryStatusEx!

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

CoolCoder_New9-Mar-09 4:58

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 4:58

i am using like this (in C# code)

stat.Length = Marshal.SizeOf(stat);

because it is not accepting

stat.Length = sizeof(stat);

will it give the correct length of the MemoryStatus

Luc Pattyn9-Mar-09 5:05

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 5:05

if you doubt it, then check it; why would you need or want spoon feeding?
You can see how large the struct is from its definition, and you can watch the value you assign to Length.

Smile | :)

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CoolCoder_New9-Mar-09 5:53

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 5:53

sorry , will set the actual value.
why i asked is i tried using Marshall.sizeof function once. it doesnt work proeprly for me. so i took the size by counting the size of every variable in a struct

Luc Pattyn9-Mar-09 6:02

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 6:02

sizeof and Marshal.SizeOf may return different values, they do represent different things.
sizeof is the size as a managed object, Marshal.SizeOf is the size when marshaled to the native world.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Dave Kreskowiak9-Mar-09 4:40

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 4:40

CoolCoder_New wrote:
=(UInt32)IPAddress.NetworkToHostOrder((int)stat.TotalPhysical);

I knew it was something you did... There's where the negative number is coming from. You converted stat.TotalPhysical to a signed integer, instead of leaving it unsigned.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

CoolCoder_New9-Mar-09 5:48

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 5:48

but i am converting NetworkToHostOrder to UInt32 right ??
NetWorkToHostOder accepts only int , long , short of C# datatype. tahts why i have converted it to int.
Oh will the uint to int creates negative value ???

Luc Pattyn9-Mar-09 6:00

Re: GlobalMemoryStatus() return negative value like -

9-Mar-09 6:00

CoolCoder_New wrote:
will the uint to int creates negative value ???

there is a 50% probability they do.

have you any idea how the number representation works?
half of the Uint32 numbers have their highest bit set indicating a value >= 2GB
when looking at the same bit pattern as an Int32 it will be negative.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

CoolCoder_New9-Mar-09 5:54