.NET Native GUID Conversion
Nov 9, 2011
I have an external database that is feeding information to me. One saves their data as native GUID format and my other data source supplies standard .NET GUID format string. Is there a tidy way to convert from Native GUID to GUID Structure? Also is there any validation bit to determine if a provided value is a Native GUID or not? I can't seem to find any if there is one. The difference is as follows:
typedef struct _GUID
{
DWORD Data1;
WORD Data2;
WORD Data3;
BYTE Data4[8];
} GUID;
Data1, Data2 and Data3 get their byte order reversed but Data4 remains the same, see [url] for more info.
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Feb 26, 2012
im workin on a task that will get the current computers Default Gatway, So i chose the easiest option, using the Registry, in most cases i find this with no problem at all, here's the code im using right now,
Public sHost As String = My.Computer.Registry.GetValue _
("HKEY_LOCAL_MACHINESYSTEMControlSet001servicesTcpipParametersInterfaces THE GUID NEEDED HERE ", "DhcpServer", Nothing)
Which works fine, if i put My GUID in where i've stated in above code, I get the right value ect..., no what i was woundering is how would i get the program to preform this task on another Computer as their GUID will be diffrent, if their away i can do this with simplicity?
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May 3, 2010
What's the advantages of the above types of dll? Is there any other type?
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May 3, 2010
What's native code? And native dll?
Can i create a native dll using vb.net?
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Jan 8, 2010
Is GUID really unique? I have a webservice that the client application connects to, which generates a GUID. I know GUID are generated using the mac adress of the NIC. Is the NIC in the webservice server used or the client NIC?
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Aug 27, 2011
I need to specify a GUID for each event declared in my class, to be able to generate a manifest for it.
Right now i'm decorating the class with the following:
ComClass("AB849263-E1F7-466B-9BAC-828E67F2871D", "EB2AB5A4-D3AD-4C01-81FB-A73AB0B3848C", "6623B1F2-2D4E-4974-AE51-369F65D47F69")
However when i use the MT tool to generate the manifest, i'm greeted with : "mt.exe : genman warning G81010014: Explicit guid not defined for type NetTest.NetClass+TestEventHandler."
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Jan 12, 2012
I have a vb6 project in which I use a dll library to do some tasks. For that, I add a module which declares all functions of that library such as:Declare Function myFunction Lib "abcdapi.dll" (ByVal hVar1 As Long, ByVal hVar2 As Long) As Long When I call this function (and many other similar) I'm able to do the work and correct Long pointer is returned. But when I try to do the same thing by VB.net (by importing the same library using dllimport and calling the same function), I get no result. although it does return some pointer but that doesn't produce correct result.
[Code]...
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Aug 20, 2009
I need to convert a windows service written in .NET into native code, independent of the .NET framework. I've looked into using NGen to do this, but couldn't figure out how to use it. Essentially, I would like to take my windows service, run it through *insert app here* and have it bundle together all of the dependent dlls from the framework into their native code equivalents, so the service is installable without the framework.
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Mar 5, 2009
I'm using VB.Net 2008, and I'm having difficulty finding information on how to detect the presence of the SQL Native Client components. I would like to detect their presence on a computer, and then find the version of the components.Does anyone have any information?
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Jul 20, 2010
i want to use some api's in my software . Other than api there is no other way .
I want to learn more about win32 api . Can some one tell me
And what is the difference between Native api and normal api
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Nov 1, 2010
I'm looking at a small remoting project in VB.NET. Initial research turns up references to msrdp.ocx which my Windows 7 Ult system doesn't have; a filesystem search on the same platform turns up MsRdpWebAccess.dll which doesn't appear to be well documented; finally hunting through COM references in Visual Studio turns up rdpencom.dll labeled "rdpcomapi 1.0 Type Library" which seems to be best documented via personal developer blogs (which isn't encouraging but is a lot better than other options).
My goal is a lightweight remoting application I can deploy to Windows 2000 Client/Server, WinXP x86/x64, Win2k3 Server, Vista x86/64, and Win2k8 Server.Is there anything DotNET Native I can use instead of one of these COM libraries? Is one of these COM libraries better for the job overall than others; and then am I going to have platform-specific compatibility issues if I don't provide support for more than 1 of them in my app?
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Apr 8, 2009
a user will enter a number, n, which ranges from 1 to 30. they will also enter a "P" or an "S" (sum or product). depending on which was selected, it will calculate the sum or product of the numbers from 1 to n.i'm having a conversion error on line 5 stating "Conversion from string "S" to type 'Double' is not valid." [code]
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May 11, 2012
I'm creating a program in VB.net that does the following:At a high level I receive a file in email, put the attachment in a monitored folder, import the text file to excel, format the excel, and then email the excel file to a list of recipients.
Here is my plan:
Completed: Outlook VBA to monitor all incoming email for specific message. Once message is received drop attached .txt file in a specific network folder.
Completed: (VB.net) Monitor folder, when text file is added begin processing
Not Complete: (VB.net) Import text file to Excel
Not Complete: (VB.net) Format Excel Text file.(add in a row of data,format column headers with color/size, add some blank columns, add data validation to some of the blank columns that allow drop down selections)
Completed: (VB.net) Save file.
Completed: (VB.net) Send file to list of recipients.
Obviously the items above that are not complete are the bulk of the work, but I wanted to get some advice on what some of you think would be the best way to approach something like this. The import and formatting of the file are causing me some problems because I just can't decide what would be the most efficient way to do this.
The way stated above. Import to excel -> format Having a template excel that contains all of the formatting already done for me and attempting to transition the data to this document (no clue if/how I can do this). Is it even feasible? Have the template already created and then import the text file to a new excel file, then transition that data to the excel template?
Something I thought about, in terms of formatting the document, was to record a macro of me doing all of the formatting that I'm going to need and then attempt to convert that macro into my vb.net code, but I'm not sure if that will work. I will need to verify that the text file comes in the EXACT format every time correct?
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Jun 28, 2011
I am building a User Management section to a website CMS.The user has a list of users and then clicks the edit button, the system then stored the UserId in a session and goes to the editUser.aspx page which will show the users details.To get the users details I need to convert the UserId session to a Guid so i can get user details.
I keep getting error message:
System.InvalidCastException: Specified cast is not valid.
Dim selectedUserId As Guid = CType(Session("strUserId"), Guid)
Dim mu As MembershipUser = Membership.GetUser(selectedUserId)
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Nov 29, 2010
I have multiple applications that will be calling a DLL.Is there a way to get the GUID from the calling application without passing it?I would like to use the GUID to verify the parent application and open up rights within the DLL for a specific app but not others.
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Oct 1, 2010
Now i am doing a vb.net desktop application, In which i have to construct GUID. Eventhough having a built-in function in our VB.NET like "System.Guid.NewGuid.ToString()" to get GUID, I need to create the GUID in 30 digits in the below mentioned criteria through vb.net.
Application constructs the GUID (30 digits) using the information from the 5 different sources. The different sources are Current system time, millisecond of the system time, Process ID for the application, system physical memory status and finally the group object identifier number.
8 digits
4 digits 8 digits
8 digits 2 digits
[Code]....
I am not sure how to get the above values to construct the GUID?
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May 28, 2010
We have a .NET app that needs to examine a folder that may contain COM libraries (DLL and OCX.) When we do encounter a COM library one thing we need to accomplish is to extract the GUID from the COM DLL or OCX.Is there a straightforward way to do this with .NET without using 3rd party libraries?
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Jun 22, 2010
I'm calling a GUID with a system function and trying to insert it into a database as a primary key. i'm using vb 2010 .net framework with sqlce server making my datatables. the column is AutoNumber which i set up to be a uniqueidentifier. the length is not adjustable and set at 16. i got all kinds of not parsing query errors. i've edited the insert statement a bunch trying to figure this out. i've went so far as changing the table schema of AutoNumber to be just a nvarchar with length of 100. it's something to do with how i'm inserting the GUID. in the code below i'm converting it into a string then inserting it into my table. is this wrong?? i've tried finding other ways of doing it but it's a little confusing. everything else in the code works perfectly it's just this part that is keeping me from completion.[code]...
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Nov 15, 2011
I'm trying to print a barcode using the following code in Lightswitch Application[code]...
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Apr 15, 2011
I'm writting an application that needs to connect to a postgres 9 database. I'd rather not use any 3rd party drivers like NPgsql and the like. I'd like a driver that comes with the visual studio.I tried to create a data connection from the IDE with .NET framework provider for Ole DB and the provider was "microsoft jet 4.0 OLE DB Provider" and it didn't work.
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Sep 16, 2011
A DLL file contains some images inside PNG resource type.
I can view the PNG images in softwares like Resource Hacker, Anolis Resourcer & Resource Tuner. Check this screenshot of Anolis Resourcer for more details:
how do I get the PNG image no. 5220 from the DLL file and put it inside a PictureBox? I don't think APIs like LoadImage or LoadBitmap will work.
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Sep 5, 2010
In a previous post [URL].. I needed to change how the values of an object's properties were displayed. In my case, I wanted to change how the native System.Drawing.PointF structure was displayed. If you check the post, it was resolved by using a TypeConverter.Now, my next question is how do I give existing properties attributes? For example, the System.Drawing.PointF structure has three properties: X, Y, and IsEmpty. I would like to give the X and Y properties descriptions. Also, I would like to hide the IsEmpty property, i.e., Browsable(False).
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Jun 2, 2011
I'm creating a VB.Net Windows Form Application. Apologies if this is not clear as I'm still new to .Net. This consists of a text box and a gridview.The user is able to write SQL code in the textbox, click run and see the results in the gridview.It uses a SQL DataAdapter and the fill method to a datatable to populate the gridview.My problem is that I need to know the SQL datatypes for each column in the data table (NOT the .net ones). I.E SQL Server 2008 data type 'Date' is stored as System.Datetime in the datatable. I need to know if the SQL Server datatype is 'Date' or 'Datetime'.
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Feb 18, 2009
I have a file called CalcProg.DLL written in Delphi which is used in Plaxis. I am planning to write a VB.net wrapper for this DLL. The problem is that I don't know what function names there are in the DLL. I was wondering if there was a wrapper generator so I could input a DLL and the generator generates a dummy CalcProg.vb with the function names so I could have a VB class that does something like this:
[Code]...
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Feb 10, 2011
I'm creating a web project for one of my uni modules using Visual studio 2010. I'm using asp.net membership and have all of my sql-server tables set up correctly (I'm pretty sure).I have a form that I have created myself that inserts into the database using sqlDataSource.insert(). I had some problems initially with not being able to insert any data into the table at all, but I have cleared that up.My problem now is that I need to insert the currently logged in user's userID into one of the columns of the table. But every time I hit the submit button, I am told I cannot insert null values in the userID column.
I can retrieve the userID using this snippet:
Dim userID As String
Dim memUser As MembershipUser
[code].....
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Jan 12, 2010
Here's the basic premise though: I need to convert a GUID-like string to a different format as shown in these examples:
Original String:
{291B3A3B-F808-45B8-8113-DF232FCB6C82}
Converted String
B3A3B192808F8B541831FD32F2BCC628
[Code].....
It works, but it doesnt seem very well written... Oh and if you are wondering why I wrote my own ReverseString method rather than just using the Reverse extension method on the String class - It seems to return a collection of chars rather than a string (god knows why) and I couldnt find any easy/obvious way to convert this collection of chars back to a string (I thought just CStr would do it but apparently not)
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Jun 2, 2010
First off, apologies, I am probably diving in a bit too deep with this one. I am trying to find the current version of the drivers in my machine. I have a list of the GUIDs and friendly names by using the following code:
[Code]...
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Apr 26, 2010
I would like to select a record from my table based on a GUID using the following approach:
dim rows() as MyDataSet.MyTableRow = dataset.MyTable.Select("id = " & Guid.NewGuid.ToString)
but I get the following exception:
System.Data.EvaluateException was unhandled
Message="Cannot perform '=' operation on System.Guid and System.Int32.
What is the best way to select a record based on a GUID using vbasic.net from MS Sql Server?
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Mar 21, 2012
I'm using a certain regex to know where there a certain string values in a string:
Regex: C[([A-Z][0-9])]
String: =C[C3]+(C[C3]-C[C5])*(C[C3]-(C[C5]+C[C3]))
This gets every C[blabla] value out of that string and when I ask for group(1), I don't even have to cut of the "C[" at the start and the "]" at the end.Now I want to do this but instead of using the C[] placeholder, I'm using G[] and so not a "C3" like string in that placeholder, but a guid so I get these:
Regex: G[[{|(]?[0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}[)|}]?]
String: =Guid[92716d13-01d1-447b-be3f-c090fed6336c]+Guid[92716d13-01d1-447b-be3f-c090fed6336c]
When I check the regex, it matches a guid perfectly, but I don't get any matches when I use more than just one guid (or when I add characters before or after).I left out the "^$" so it doesn't define a start and end anymore, but that didn't seem to be the problem.
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Mar 21, 2011
To do some testing with MPIR, GMP, the .Net Bigint module and other math libraries I've recently written a small program which allows me to create random sequences of numbers with a certain amount of precision: Always this amount of digits in front and behind the comma, no starting/ending zeroes. While it might not be the most elegant of code, it really blew my mind when I found out my application was running up to 10 times faster with Mono under Ubuntu 10.10.While the code is not elegant and in Basic, it was developed by me in about an hour's work and it serves the purpose: To generate dependable huge datasets consisting solely of preconfigured numbers before or after the comma. To get a general idea the UI's posted here:[code]Eliminating IO by not writing to IO but just to a List instead Eliminating an "if" path which checks if the random before/after float character is checked.Disabled progress reporting in general which causes the backgroundworker to not report any progress.Play around with the amount of symbols, theres very little difference between just getting 1 random character or getting 15 per record.I'm at a loss to what causes my program to run so slow under Windows/.Net compared to Ubuntu/Mono. I'm only a "half programmer", which means: I'm a Bussiness and ICT student who mainly focusses on human ICT, and the Microsoft Platforms certainly have lead on that, however such a huge performance hit compared to Linux for this soul and simple program really gives me a cold chill when it comes to my favourite platform.
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