String manipulation

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- Previous
  - 1
    - How to tell if PropertyInfo defines a static or instance property Given a PropertyInfo object, how can I determine if the property that it describes is a static or instance property? The same question applies to EventInfo. MethodInfo, ConstructorInfo and FieldInfo all have an IsStatic member, but PropertyInfo and EventInfo do not have this member, which seems a bit strange. Tag: String manipulation Tag: 97423
  - 2
    - Process.Start("MyComputer"); Hi, I'm trying to launch an instance of explorer from windows that will default to the "My Computer" branch. Any suggestions? I've tried: string myComp = Environment.SpecialFolder.MyComputer.ToString(); System.Diagnostics.Process.Start(myComp); which fails, is there a special folder that i can give to explorer as an argument? Thanks Tag: String manipulation Tag: 97421
  - 3
    - Checking for implementation of an interface I have an application that accepts plugins. It allows the user to choose which plugins they want to run from a list of available plugins. My problem is that I need to build that list of plugins by checking the assemblies in the plugins folder to see if they implement the plugin interface. If I load each assembly and check it, then I have all those assemblies in memory until the application gets shutdown, even though the user may only want to use a few of them. My idea was to load them all into a separate appdomain to check them and build my list, and then unload that domain. Then I could just load the plugins that the user chooses. My problem is that I don't know how to check the assembly to see if it implements the plugin interface once its loaded into the separate appdomain. Can anyone point me to an article on this, or some sample code? Thanks! Tag: String manipulation Tag: 97414
  - 4
    - EnvDTE and EnvDTE80 I am using Visual Basic Express (May release) and I am trying to create a solution programatically. How do I do this? I know I need to use the AddFromTemplate but how do I determine the path to the template that I want to use, let's say the template is the "winfxapplication" template, which on my machine is "C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\VBExpress\ProjectTemplatesCache\1033\WindowsApplication.zip\windowsapplication.vstemplate" Or do I point it at the .vbproj file: "C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\VBExpress\ProjectTemplatesCache\1033\WindowsApplication.zip\windowsapplication.vbproj" I'm assuming there are just a few lines of code required. First of all, I want to create a VS2005 object. I have tried: Dim env As EnvDTE80.DTE2 = CType(Microsoft.VisualBasic.Interaction.CreateObject("VisualStudio.DTE.8.0", ""), EnvDTE80.DTE2) but that tells me it cannot create the ActiveX object. I then tried: Dim env As EnvDTE.DTE = CType(Microsoft.VisualBasic.Interaction.CreateObject("VisualStudio.DTE.7.1", ""), EnvDTE.DTE) and that creates the object, so when I do this: ENV.Solution.ADDFromTemplate("C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\VBExpress\ProjectTemplatesCache\1033\WinFXApplication.zip\WinFXApplication.vbproj", "e:\mytests", "myproject.vbproj") I get the message "The file blah blah is not a valid project file. The project file is missing the 'VisualStudioProject' section." whatever that means. I think I am on the right track here, can anybody out there just straighten me out on this? I am starting to tear my hair out. Thanks in advance, Richard Tag: String manipulation Tag: 97413
  - 5
    - Protecting classes with LicenseManager: COM issue Hello, I have a class (C#) in an assembly that I wish to protect with a licensing scheme. The class is designed to be consumed by any other managed code language, and via COM clients. That is, the class is registered for COM interop, and may be instantiated by VBS code, etc. We are using the inherent .NET Framework licensing classes. We've used the LicenseProviderAttribute to specify a LicenseProvider descendent. The LicenseProvider descendent's GetLicense() method checks the LicenseContext for LicenseUsageMode.Runtime or LicenseUsageMode.DesignTime. This works great when the class is being instantiated by a .NET application. We run into a problem when the class is instantiated via COM interop from, say, a VBS script. When started this way, the GetLicense() method LicenseContext argument is _always_ LicenseUsageMode.DesignTime. This upsets the licensing model we want to use. Is this working as designed? I had hoped a class instantiated via COM interop would be seen to be working in LicenseUsageMode.Runtime mode, not LicenseUsageMode.DesignTime. Thanks in advance, Grant Tag: String manipulation Tag: 97411
  - 6
    - How to convert char[] buffer into Image? Hi, Sorry if this question sound stupid, how do I actually convert a char[] buffer into Image? I am currently using C# and compact .net framework for PocketPC development. Thanks for reading. Tag: String manipulation Tag: 97404
  - 7
    - VB 6 app calling C# windows service Hi Guys, Has anyone written a windows service in C# that used multiple threads, then wrote a VB 6 application that called the various methods on the C# Service? Any problems with it? Thanks Tag: String manipulation Tag: 97402
  - 8
    - Call was rejected by callee Hi, I am having a problem with a vb.net mappoint application. Currently in my application I have pushpins that move according to GPS locations that are constantly being updated. Everything seems to work fine but when I start using the toolbar functions in the mappoint object while tracking/updating points I always get this following error: An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in TrackBerryMapPoint.exe Additional information: Call was rejected by callee. For example, if i use the location search bar while I'm tracking, the find dialog box pops up and then everything crashes. I'm using a timer for the updates of the tracking points and I think that might cause the exception. If anyone has an suggestions I'd appreciate it very much. Thanks Tag: String manipulation Tag: 97398
  - 9
    - Subform ia unexpectedly closing parent form problem Hi, I'm using the .NET environment, writing in C#. I have a windows form application which is causing me a headache. I have a main form and also a subform, when I close the subform, the main form also closes, which obviously terminates the application. I've checked my dialog result from the subform and it's all looking fine. The form was imported from another project with no apparent issues, I'm not sure if this has any thing to do with it? Many thanks for your input. Stuart Tag: String manipulation Tag: 97397
  - 10
    - Some services stop automatically if they have no work to do, for e I got a Server Class in an executable and I would like to change this in a windows service. The code from the main function of the executable is the following: LoadReportingServer server = new LoadReportingServer (); server->Start (); Console::WriteLine (S"Press ENTER to stop the server..."); Console::ReadLine (); server->Stop (); server = 0; I tried to turn this into a service following two tutorials, and it compiles fine. Whenever I start the Service in the Service Manager, I get the Message that my service started and stopped again. Attempt 1: using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.ServiceProcess; namespace SoftwareLoadBalancing { public class LoadReportingService : System.ServiceProcess.ServiceBase { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; private LoadReportingServer server; public LoadReportingService() { // This call is required by the Windows.Forms Component Designer. InitializeComponent(); // TODO: Add any initialization after the InitComponent call } // The main entry point for the process static void Main() { System.ServiceProcess.ServiceBase[] ServicesToRun; // More than one user Service may run within the same process. To add // another service to this process, change the following line to // create a second service object. For example, // // ServicesToRun = new System.ServiceProcess.ServiceBase[] {new Service1(), new MySecondUserService()}; // ServicesToRun = new System.ServiceProcess.ServiceBase[] { new LoadReportingService() }; System.ServiceProcess.ServiceBase.Run(ServicesToRun); } /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { components = new System.ComponentModel.Container(); this.ServiceName = "LoadReportingService"; } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } /// <summary> /// Set things in motion so your service can do its work. /// </summary> protected override void OnStart(string[] args) { // TODO: Add code here to start your service. server = new LoadReportingServer(); server.start(); } /// <summary> /// Stop this service. /// </summary> protected override void OnStop() { // TODO: Add code here to perform any tear-down necessary to stop your service. server.Stop (); server = null; } } } This does not do anything but displaying the message that it started and stopped again. Attempt 2: using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.ServiceProcess; using System.Threading; namespace SoftwareLoadBalancing { public class LoadReportingService : System.ServiceProcess.ServiceBase { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; private ThreadStart threadDelegate; private LoadReportingServer server; public LoadReportingService() { // This call is required by the Windows.Forms Component Designer. InitializeComponent(); // TODO: Add any initialization after the InitComponent call } // The main entry point for the process static void Main() { System.ServiceProcess.ServiceBase[] ServicesToRun; // More than one user Service may run within the same process. To add // another service to this process, change the following line to // create a second service object. For example, // // ServicesToRun = new System.ServiceProcess.ServiceBase[] {new Service1(), new MySecondUserService()}; // ServicesToRun = new System.ServiceProcess.ServiceBase[] { new LoadReportingService() }; System.ServiceProcess.ServiceBase.Run(ServicesToRun); } /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { components = new System.ComponentModel.Container(); this.CanPauseAndContinue = true; this.ServiceName = "LoadReportingService"; } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } /// <summary> /// Set things in motion so your service can do its work. /// </summary> protected override void OnStart(string[] args) { // TODO: Add code here to start your service. server = new LoadReportingServer(); threadDelegate = new ThreadStart(server.Start); Thread newThread = new Thread(threadDelegate); newThread.Start(); } /// <summary> /// Stop this service. /// </summary> protected override void OnStop() { // TODO: Add code here to perform any tear-down necessary to stop your service. server.Stop (); server = null; } } } This does not do anything but displaying the message that it started and stopped again. What am I doing wrong? Can anybody help me? Thanks in advance Chucker Tag: String manipulation Tag: 97396
  - 11
    - Create forms from threads Hi, I need to be able to create one or more form(s) from a method that is called from different threads. When this form is created, it appears but it does not receive any message. It looks blank, and when you move your cursor over it, it becomes an hourglass. Can anyone help me with this? Thanx in advance... Kind regards, Kevin Chabot Tag: String manipulation Tag: 97392
  - 12
    - "scrolling buttons" I would like to make some kind of buttons that can be used to scroll other things. Actually it would like it to be exactly as in Lightwave's Envelope Editor - when you push the button, the mouse pointer should disappear and you should be able to scroll something with moving your mouse up/down and left/right. Perphaps hiding mouse wouldn't be that hard [or would it?], but I wonder about "scrolling" itself - I generally use MouseMove event, and in this case the pointer would quickly leave the button's area and i would get no event to handle... What's the best way to deal with that? Thanks for reading this :-) -- michal.'creed'.szostakiewicz............................coder.of.ultimaa... .creed@tarchomin.pl ....................................................... .ms201103@zodiac.mimuw.edu.pl ............................................. .icq.2482112 ...........................iMMersE.your.soUL.in.lOVE......<><. Tag: String manipulation Tag: 97391
  - 13
    - Printing using VB.NET Windows Applications Hi. I developed an application in vb.net. This app send any type of file to print. I selected this printer in my app. I use this following codes: Seting default printer before print Public Sub SetDefaultPrinter(ByVal PrintName As String) Dim WshNetwork As Object = CreateObject("WScript.Network") WshNetwork.SetDefaultPrinter(PrintName) WshNetwork = Nothing End Sub Printing the file Public Sub Imprimir(ByVal FileName As String) Dim pr As New Process pr.StartInfo.FileName = FileName pr.StartInfo.Verb = "Print" pr.StartInfo.CreateNoWindow = True pr.StartInfo.WindowStyle = ProcessWindowStyle.Hidden pr.Start() End Sub My problem: I have 2 printers, Printer A and Printer B . In print A I can print, but in print B I cannot. These printers are installed in the network. I can pirnt in the printer B via MS Word. Does anyone know whatÂ´s hapining? Any ideas? Tag: String manipulation Tag: 97389
  - 14
    - 1.1 and 2.0 Can I install the 1.1 framework with the 2.0 framework on the same server and run VS2003 and VS2005 at the same time? I installed 2.0 on a workstation and it looks like the 1.1 framework stayed put. If anyone can clarify this it would be greatly appreciated. Thanks all, Andy Tag: String manipulation Tag: 97388
  - 15
    - ASP.NET lock up Hi. I'm experiening random lockups of my ASP.NET application. I see lots of these error messages from .NET runtime in the event log: The description for Event ID ( 0 ) in Source ( .NET Runtime ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: .NET Runtime version 1.1.4322.2032- Setup Error: Failed to load resources from resource file Please check your Setup. What does this mean and could it be related to the problem? Casper Tag: String manipulation Tag: 97384
  - 16
    - Emit, MarshalAs & PInvoke This is a multi-part message in MIME format. ------=_NextPart_000_00EE_01C56763.DC1E8CA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable (I post this message again, but with a more appropriate title) I have some problem to control finely the signature of some a PInvoke = Method I want to dynamically generate. Let say, if it was staticaly declared it would look like that: --------------------------- struct MyStruct { int a; int b; } [DllImport("dllname", EntryPoint=3D"name", CharSet=3DAnsi)] string MyFunction( [MarshalAs(LPWStr)] string s1,=20 [MarshalAs(LPWStr)] StringBuffer buf, string s2,=20 ref MyStruct m,=20 out int u); --------------------------- I thought of something like that (but the marshall & ref/out information = is missing, hence my question) --------------------------- AssemblyBuilder ab =3D .......; TypeBuilder ab.DefineType("aType", TypeAttribute.Public); MethodBuilder mb =3D tb.DefinePInvokeMethod( "MyFunction", "dllname", "name", MthdAttr.PinvokeImpl | MthdAttr.Static | MthdAttr.Public, CallingConventions.Standart | CallingConvention.Varargs, typeof(string),=20 // how to setup the out/ref/marshallasattribute for the type below? new Type[]{ typeof(string), typeof(StringBuffer), typeof(string), = typeof(MyStruct), typeof(int) }, CallingConvention.Cdecl, CharSet.Ansi ); // for some reason this flag (below) required // of course I want to preserve the Signature, what kind of flag it is = ?!?!?! mb.SetImplementationFlags(MethodImplAttributes.PreserveSig);=20 I think (but not tested yet) that I might solve part of the problem (the = ref/out) with call to mb.DefineParameter(4, ParameterAttributes.Retval, null)=20 mb.DefineParameter(5, ParameterAttributes.Out, null) but=20 1. I'm not sure it will work (a bit difficult to test) 2. what about the ANSI/Unicode marshalling? Any tip? thanks! ------=_NextPart_000_00EE_01C56763.DC1E8CA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2627" name=3DGENERATOR> <STYLE></STYLE> </HEAD><FONT face=3DArial><FONT size=3D2> <BODY> <DIV> <DIV><FONT face=3DArial size=3D2>(<EM><FONT color=3D#0000ff>I post this = message again,=20 but with a more appropriate title</FONT></EM>)</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>I have some problem to control finely = the signature=20 of some a PInvoke Method I want to dynamically generate.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Let say, if it was staticaly declared = it would look=20 like that:</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>---------------------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2>struct MyStruct</FONT></DIV> <DIV><FONT face=3DArial size=3D2>{</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    int a;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    int b;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>}</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>[DllImport("dllname", = EntryPoint=3D"name",=20 CharSet=3DAnsi)]</FONT></DIV> <DIV><FONT face=3DArial size=3D2>string MyFunction(</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    [MarshalAs(LPWStr)] = string s1,=20 </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    [MarshalAs(LPWStr)] = StringBuffer=20 buf,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    string s2, = </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    ref MyStruct m, = </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    out int = u);</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>---------------------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I thought of something like that (<FONT = color=3D#ff0000>but the marshall & ref/out information is missing, = hence my=20 question</FONT>)</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>---------------------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2>AssemblyBuilder ab =3D = .......;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>TypeBuilder ab.DefineType("aType",=20 TypeAttribute.Public);</FONT></DIV> <DIV><FONT face=3DArial size=3D2>MethodBuilder mb =3D=20 tb.DefinePInvokeMethod(</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = "MyFunction",</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = "dllname",</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    "name",</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    MthdAttr.PinvokeImpl = |=20 MthdAttr.Static | MthdAttr.Public,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = CallingConventions.Standart |=20 CallingConvention.Varargs,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    typeof(string), = </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    <FONT = color=3D#008080>// how to=20 setup the out/ref/marshallasattribute for the type = below?</FONT></FONT></DIV> <DIV><FONT face=3DArial size=3D2>    new Type[]{ = typeof(string),=20 typeof(StringBuffer), typeof(string), typeof(MyStruct), typeof(int)=20 },</FONT></DIV> <DIV><FONT face=3DArial size=3D2>   =20 CallingConvention.Cdecl,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = CharSet.Ansi</FONT></DIV> <DIV><FONT face=3DArial size=3D2>);</FONT></DIV> <DIV><FONT face=3DArial color=3D#008080 size=3D2>// for some reason = this flag=20 (below) required</FONT></DIV> <DIV><FONT face=3DArial color=3D#008080 size=3D2>// of course I want to = preserve the=20 Signature, what kind of flag it is ?!?!?!</FONT></DIV> <DIV><FONT face=3DArial=20 size=3D2>mb.SetImplementationFlags(MethodImplAttributes.PreserveSig);=20 </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I think (but not tested yet) that I = might solve=20 part of the problem (the ref/out) with call to</FONT></DIV> <DIV><FONT face=3DArial size=3D2> <DIV><FONT face=3DArial size=3D2>mb.DefineParameter(4, = ParameterAttributes.Retval,=20 null)=20 <DIV><FONT face=3DArial size=3D2>mb.DefineParameter(5, = ParameterAttributes.Out,=20 null)</FONT></DIV> <DIV> </DIV> <DIV>but </DIV> <DIV>1. I'm not sure it will work (a bit difficult to test)</DIV> <DIV>2. what about the ANSI/Unicode marshalling?</DIV> <DIV> </DIV> <DIV>Any tip?</DIV> <DIV>thanks!</DIV></FONT></DIV></FONT></DIV></DIV></BODY></HTML></FONT></= FONT> ------=_NextPart_000_00EE_01C56763.DC1E8CA0-- Tag: String manipulation Tag: 97373
  - 17
    - Pass parameter to the popup window Hi, I have 2 webform in vb.NET application. On Webform1, I have one text box1 and one button. on Webform2, I have one text box . I need transfer the value of textbox 1 in webform1 to textbox2 in webform2. and popup webform2 when user click on the button on webform1. I have code in webform1: Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Button1.Attributes.Add("onclic=ADk", "window.open('WebForm2.aspx?a=3D=AD" + TextBox1.Text.ToString + "',null,'height=3D250, width=3D250,status=3D no, resizable=3D no, scrollbars=3Dno, toolbar=3Dno,location=3Dno,menubar=AD=3Dn= o ');") End Sub and following code in webform2: Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load TextBox1.Text =3D Request("a").ToString End Sub I could not get the result unless I click on the button1 twice. i know what happen in here but have no solution. I will be appreciated if you could help here.=20 Thanks in advanced,=20 Di Tag: String manipulation Tag: 97371
  - 18
    - Emit PInvoke This is a multi-part message in MIME format. ------=_NextPart_000_0095_01C56758.3ADE0920 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have some problem to control finely the signature of some a PInvoke = Method I want to dynamically generate. Let say, if it was staticaly declared it would look like that: --------------------------- struct MyStruct { int a; int b; } [DllImport("dllname", EntryPoint=3D"name", CharSet=3DAnsi)] string MyFunction( [MarshalAs(LPWStr)] string s1,=20 [MarshalAs(LPWStr)] StringBuffer buf, string s2,=20 ref MyStruct m,=20 out int u); --------------------------- I thought of something like that (but the marshall & ref/out information = is missing, hence my question) --------------------------- AssemblyBuilder ab =3D .......; TypeBuilder ab.DefineType("aType", TypeAttribute.Public); MethodBuilder mb =3D tb.DefinePInvokeMethod( "MyFunction", "dllname", "name", MthdAttr.PinvokeImpl | MthdAttr.Static | MthdAttr.Public, CallingConventions.Standart | CallingConvention.Varargs, typeof(string),=20 // how to setup the out/ref/marshallasattribute for the type below? new Type[]{ typeof(string), typeof(StringBuffer), typeof(string), = typeof(MyStruct), typeof(int) }, CallingConvention.Cdecl, CharSet.Ansi ); // for some reason this flag (below) required // of course I want to preserve the Signature, what kind of flag it is = ?!?!?! mb.SetImplementationFlags(MethodImplAttributes.PreserveSig);=20 I think (but not tested yet) that I might solve part of the problem (the = ref/out) with call to mb.DefineParameter(4, ParameterAttributes.Retval, null) mb.DefineParameter(5, ParameterAttributes.Out, null) but=20 1. I'm not sure it will work (a bit difficult to test) 2. what about the ANSI/Unicode marshalling? Any tip? thanks! ------=_NextPart_000_0095_01C56758.3ADE0920 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2627" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>I have some problem to control finely = the signature=20 of some a PInvoke Method I want to dynamically generate.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Let say, if it was staticaly declared = it would look=20 like that:</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>---------------------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2>struct MyStruct</FONT></DIV> <DIV><FONT face=3DArial size=3D2>{</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    int a;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    int b;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>}</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>[DllImport("dllname", = EntryPoint=3D"name",=20 CharSet=3DAnsi)]</FONT></DIV> <DIV><FONT face=3DArial size=3D2>string MyFunction(</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    [MarshalAs(LPWStr)] = string s1,=20 </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    [MarshalAs(LPWStr)] = StringBuffer=20 buf,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    string s2, = </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    ref MyStruct m, = </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    out int = u);</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>---------------------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I thought of something like that (<FONT = color=3D#ff0000>but the marshall & ref/out information is missing, = hence my=20 question</FONT>)</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>---------------------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2>AssemblyBuilder ab =3D = .......;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>TypeBuilder ab.DefineType("aType",=20 TypeAttribute.Public);</FONT></DIV> <DIV><FONT face=3DArial size=3D2>MethodBuilder mb =3D=20 tb.DefinePInvokeMethod(</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = "MyFunction",</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = "dllname",</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    "name",</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    MthdAttr.PinvokeImpl = |=20 MthdAttr.Static | MthdAttr.Public,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = CallingConventions.Standart |=20 CallingConvention.Varargs,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    typeof(string), = </FONT></DIV> <DIV><FONT face=3DArial size=3D2>    <FONT = color=3D#008080>// how to=20 setup the out/ref/marshallasattribute for the type = below?</FONT></FONT></DIV> <DIV><FONT face=3DArial size=3D2>    new Type[]{ = typeof(string),=20 typeof(StringBuffer), typeof(string), typeof(MyStruct), typeof(int)=20 },</FONT></DIV> <DIV><FONT face=3DArial size=3D2>   =20 CallingConvention.Cdecl,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>    = CharSet.Ansi</FONT></DIV> <DIV><FONT face=3DArial size=3D2>);</FONT></DIV> <DIV><FONT face=3DArial color=3D#008080 size=3D2>// for some reason = this flag=20 (below) required</FONT></DIV> <DIV><FONT face=3DArial color=3D#008080 size=3D2>// of course I want to = preserve the=20 Signature, what kind of flag it is ?!?!?!</FONT></DIV> <DIV><FONT face=3DArial=20 size=3D2>mb.SetImplementationFlags(MethodImplAttributes.PreserveSig);=20 </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I think (but not tested yet) that I = might solve=20 part of the problem (the ref/out) with call to</FONT></DIV> <DIV><FONT face=3DArial size=3D2> <DIV><FONT face=3DArial size=3D2>mb.DefineParameter(4, = ParameterAttributes.Retval,=20 null) <DIV><FONT face=3DArial size=3D2>mb.DefineParameter(5, = ParameterAttributes.Out,=20 null)</FONT></DIV> <DIV> </DIV> <DIV>but </DIV> <DIV>1. I'm not sure it will work (a bit difficult to test)</DIV> <DIV>2. what about the ANSI/Unicode marshalling?</DIV> <DIV> </DIV> <DIV>Any tip?</DIV> <DIV>thanks!</DIV></FONT></DIV></FONT></DIV></BODY></HTML> ------=_NextPart_000_0095_01C56758.3ADE0920-- Tag: String manipulation Tag: 97370
  - 19
    - media player activeX for Win 98 Hello Iâ??m currently developing an windows forms app that will show video via the media player activeX control. Piece of cake using player 9 and the primary interop assembly. But, how do I develop the same for Win 98 using player 6.4? Since I do not have 6.4 on my developing workstation (win 2003 server) I cannot let VS.NET create an interop assembly for me. Is there a way around this? TIA Tag: String manipulation Tag: 97365
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    - tool to analyze file differences What will be a good tool to analyze file differences Tag: String manipulation Tag: 97362
  - 21
    - .Net Framework 2 Beta 2 Hi Can anyone tell me what version of mscorlib is shipped with the .net framework 2 beta 2? On my machine it is 2.0.0.0 and on a colleagues machine it is 2.0.3600.0. Which is the correct version? I am havineg problems loading .net 1.1 assemblies when I have the .net2 framework installed on my machine and it seems to be because mscorlib is taking into account the "processarchitecture" attribute when creating the reference identity and comparing it with the definition identity which does not have the "processarchitecture" attribute, so it says the referenced file cannot be located. My colleague does not seem to have this issue, but his mscorlib version is 2.0.3600.0 and mine is 2.0.0.0. Regards Tag: String manipulation Tag: 97361
  - 22
    - Transaction code causing runtime exception Hi, I am currently trying write a windows form without much success to implement an enterprise transaction that will encapsulate a write to an oracle database, write a text file and then open a user control in another windows form an collect a response from this. I have been getting the following run-time error 'System.EnterpriseServices.SerÂvicedComponentException' occurred in system.enterpriseservices.dll then i stop the debug application and the following runtime appears at the same point when i run it again. A first chance exception of type 'System.IO.FileNotFoundExceptiÂon' occurred in mscorlib.dll followed by A first chance exception of type 'System.ArgumentException' occurred in mscorlib.dll Additional information: Type passed must be an interface. If i restart the machine i will receive the first error again. I have added a strong name key to the application, also my actual class that contains the transaction does nothing but open the trnsaction and then complete it, but the class resides within the forms executable and not a complied dll. Any help would be greatly appreciated Cheers D Tag: String manipulation Tag: 97359
  - 23
    - SP vs .NET results Hi Can someone give me guidance on the following scenario? I have a windows service application that kicks off a job that perform complex processing and call a stored procedure that run for +- 45 minutes. I need a mechanism to notify the service to throw an exception when the database connection is lost or there's a critical error on the database server. Currently, if there is an error on the database, say db connection, no notification is sent. The windows service fire the jobs using multi-threading. Tag: String manipulation Tag: 97358
  - 24
    - Just a question When will managed Windows forms get as fast of their counterparts in C/C++ ? I think if there is only one weak point in dotNet performance, it is its slow win forms, which make Win developers like me to deny the full power of .NET. It is not just the load time that teases, we have too much overhead with heavy treeViews and listViews that sometimes make us giving up the whole project on .NET and going back to C++. Thanks for any help. Tag: String manipulation Tag: 97351
  - 25
    - Exit Code 67 I have a fairly simple Windows Forms application developed using C#. It basically listens to two serial ports and displays the results. There are three threads that each listen to a network socket. Additionally there is the GUI thread, the two serial threads, and some threads to process the data from the serial ports. For the serial communications I am using John Hind's NETSerialComm wrapper library. Occasionally, the tool will exit with error code 67. When you look that up, it is listed as "The network name cannot be found." At the time it happens there are no network connections, just three sockets in listen state. It can happen after 12 hours or 3 days. Or not show up for a while. Any insight into why this might happen is appreciated. Dave Uhrenholdt Tag: String manipulation Tag: 97347
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  - 1
    - Transaction spanning multiple business classes Hi I have a problem on how to span a transaction over multiple business classes without using COM+ Example: A existing person get an MailingAddress assigned to public class PersonService { public void InsertMailingAddress(data) { //ask the AddressService to insert an address new AddressService().InsertAddress(); //update the person with the ID from the newly inserted address } } As you can see, this should be in a transaction --> Insert Address --> Update Person How can i span this in a transaction without passing sqltransaction objects in the businesslayer? Any ideas??? Tag: String manipulation Tag: 97346
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    - problems with Microsoft.Enterprise.Library I am trying to use EnterpriseLibrary packages in an IOC pattern. Note on implementation: I have LoggingServiceManager which is tightly bound to a Logging Application Block and implements an interface ILoggingServiceManager. ILoggingServiceManager is contained within an asssembly CommonServiceManager. My intended user (a class cMain) would refer to the CommonServiceManager and using ILoggingManager interface invoke methods of the Logging Application Block. Issue: The Logging Application Block uses run-time binding and hence needs references of Logging Application Block at the cMain level. And this breaks the IOC pattern completely. Has anyone comeacross such a scenario with Application Blocks. this problem occurs with Logging, Caching and Cryptograpghy Application Blocks (so far...). Ranjit Radhakrishnan Tag: String manipulation Tag: 97344
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    - WinNT and search for computers in NT4 My application needs to enumerate computers on both AD domains and also on existing NT domains. The search of AD domains was a snap, but the WinNT provider errors out telling me you cannot search on this provider. I need to return a list of computers (and distinguish servers fron workstations) in a particular NT domain. Anybody out there run into this? Tag: String manipulation Tag: 97343
  - 4
    - Windows Service Deployment problem I get the following Log in EventLog on attempting to use a custom action to write to a config file in the to be installed application after a call to the base Install method. The description for Event ID ( 11001 ) in Source ( MsiInstaller ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: Product: DOILoadWindowsService -- Error 1001. Exception occurred while initializing the installation: System.IO.FileNotFoundException: File or assembly name DOI, or one of its dependencies, was not found.., (NULL), (NULL), (NULL). Without this custom action, the install works OK, with it, it fails every time. The custom action uses CustomActionData as follows: /WATCHED=[WATCH] UPLOADED=[UPLOADED] ERRORS=[ERRORS] ERRORFILE=[ERRORFILE] where the values are collected from a UserInterface TextBox object. Without the custom action, the folders referred to above are created every time but I want the user defined paths to be written to the config file so that they can be accessed by the Windows service when it is started or running. What is going on here? How can I sort this out? cheers -- PeterW Tag: String manipulation Tag: 97340
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    - Execution in Visual Studio vs Native Execution With regards to running a project in the Visual Studio developement environment as opposed to executing the exe directly from the hard drive..... I am developing an application in C# using VS.NET 2003...my application seems to respond differently when i run it using the development environment as opposed to when i run it directly from the exe. For instance, in my code i have a try-catch block and inside the try block i explicitly throw an exception and i handle it , for example, with a msg box or something. This works fine when i run it using Visual Studio (even when running a Release build) but when running it directly from the exe the dreaded "An unhandled exception has occurred in your application. If u...etc" dialog box appears. What is the reason for this? I am really stumped and dont know what i can/should do since this is an intergral part of the application. Any help will be greatly appreciated. Tag: String manipulation Tag: 97337
  - 7
    - Write to config file from deployment project I have a deployment project where I collect the paths to 4 user defined directories using user interface textboxes that are then mapped to folders in the file system editor that are always created. This all works fine. What I want to do is update the config file for the application so that if any are changed the application will know what those folders are. I have tried to use a Custom action to write the config file but the install override does not seem to be called at all. If you write an override in an installer class, how and where is this called? I have looked at the Walkthrough for Passing Data to a Custom Action but the method never seems to get fired. Any help is appreciated. PeterW Tag: String manipulation Tag: 97334
  - 8
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    - Intercept POST command from ASP.NET My window console application performs a batch processing job in= a certain interval of time=2E It post (HTTP "POST") data in xml= format to my ASP=2ENET application=2E My question is: 1=2E How does my ASP=2ENET application detects if a data is posted to= it ? Is there any event driven stuffs that the ASP=2ENET= application can deal with when a POST is detected ? Put it= simply, my ASP=2ENET app should always be in "listening" mode=2E At= the moment, I am looking into HTTP handler=2E Am I going for the= right direction ? 2=2E How do I extract the xml data posted(by the console= application) from ASP=2ENET app ? Thanks in advance=2E -------------------------------- From: Quest Quest ----------------------- Posted by a user from =2ENET 247 (http://www=2Edotnet247=2Ecom/) <Id>Vh38BH5W+USQwnJspjbOaw=3D=3D</Id> Tag: String manipulation Tag: 97325
  - 10
    - Problem with creating and verifying multipart/signed SMIME messages in c# Does anybody have an idea of creating SMime multipart signed= messages using CAPICOM/C#=2E I have tried the articles given in= the MSDN and other help i founf on internet for changing IL code= for marshalling of BSTR to native int but i want a solution= which does not require any il code modification=2E If anybody can= provide code that would be great=2E Thanks=2E -------------------------------- From: Vinay Pole ----------------------- Posted by a user from =2ENET 247 (http://www=2Edotnet247=2Ecom/) <Id>0qofPgUQxUqI0RgpqK/4sA=3D=3D</Id> Tag: String manipulation Tag: 97321
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  - 12
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  - 13
    - Assembly loaded by a static (shared) function As I understand it, the only way to unload an assembly from memory is to load it in a separate appdomain and then unload that appdomain. However, I'm not sure about this situation. Here's the question: If an assembly is loaded by a static (shared) function, and no reference is maintained after that function returns, does the assembly remain in memory? Just trying to get this sorted out. Thanks! Tag: String manipulation Tag: 97315
  - 14
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  - 15
    - Reading the stream from a web response causes timeouts Hi, Im writing an application that crawls a website. One problem Ive come across is that sometimes, when reading the contents of a web response, the application will hang and timeout. This occurs when I am trying to read the stream returned from the GetResponseStream of the HttpWebResponse object. The code I am using is detailed below. I used the ReadFully method that Jon Skeet outlines on his website, just to be safe. http://www.yoda.arachsys.com/csharp/readbinary.html In the example below, I find that while I can download the file and view it using IE, when running my app, it frequently starts timing out after reading aprx 700kb - if anyone could suggest where I am going wrong it would be greatly appreciated. Thanks in advance, Mark Fletcher using System; using System.IO; using System.Net; namespace WebRequest2 { /// <summary> /// Summary description for Class1. /// </summary> class Driver { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main(string[] args) { Uri uri = new Uri("http://www.hubbardone.com/pdf/peer_to_peer_11-24-03.pdf"); HttpWebRequest httpRequest = null; httpRequest = (HttpWebRequest)WebRequest.Create(uri); httpRequest.Timeout = 500000; httpRequest.KeepAlive = true; HttpWebResponse httpResponse = null; Stream responseStream = null; try { httpResponse = (HttpWebResponse)httpRequest.GetResponse(); responseStream = httpResponse.GetResponseStream(); byte[] buffer = Driver.ReadFully(responseStream,1024); Console.WriteLine("Finished"); } catch(IOException ioex) { Console.WriteLine(ioex.Message); } catch(Exception ex) { Console.WriteLine(ex.Message); } finally { responseStream.Close(); httpResponse.Close(); } } public static byte[] ReadFully (Stream stream, int initialLength) { // If we've been passed an unhelpful initial length, just // use 32K. if (initialLength < 1) { initialLength = 32768; } byte[] buffer = new byte[initialLength]; int read=0; int chunk; while ( (chunk = stream.Read(buffer, read, buffer.Length-read)) > 0) { read += chunk; // If we've reached the end of our buffer, check to see if there's // any more information if (read == buffer.Length) { int nextByte = stream.ReadByte(); // End of stream? If so, we're done if (nextByte==-1) { return buffer; } // Nope. Resize the buffer, put in the byte we've just // read, and continue byte[] newBuffer = new byte[buffer.Length*2]; Array.Copy(buffer, newBuffer, buffer.Length); newBuffer[read]=(byte)nextByte; buffer = newBuffer; read++; } } // Buffer is now too big. Shrink it. byte[] ret = new byte[read]; Array.Copy(buffer, ret, read); return ret; } } } Tag: String manipulation Tag: 97313
  - 16
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  - 17
    - Determining from a service if a user is logged on This is a multi-part message in MIME format. ------=_NextPart_000_0016_01C565D5.150CD890 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable After reading some posts on the subject there seemed to be a consensus = that when a user is interactively logged on to a machine, that there = would be a windows station called "WinSta0" that would contain a desktop = called "Default". When no user was logged on then the respective = windows station and desktop would not be present. I can properly enumerate the windows station and desktops and it reports = correctly when I'm logged on. However, when the service is running and = I log off it still reports that there is a WinSta0 station containing a = desktop called "Default". I know this because the service writes its = findings to the event log every 10 seconds. So after I log off and wait = a few cycles and log back on, every entry says that I'm logged on. So, my question is how can I determine from a service is a user is = logged on to a workstation? Is this the correct track to pursue or is = there another way? Thanks. ------=_NextPart_000_0016_01C565D5.150CD890 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2627" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>After reading some posts on the subject = there=20 seemed to be a consensus that when a user is interactively logged on to = a=20 machine, that there would be a windows station called "WinSta0" that = would=20 contain a desktop called "Default".  When no user was logged on = then the=20 respective windows station and desktop would not be = present.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I can properly enumerate the windows = station and=20 desktops and it reports correctly when I'm logged on.  However, = when the=20 service is running and I log off it still reports that there is a = WinSta0=20 station containing a desktop called "Default".  I know this because = the=20 service writes its findings to the event log every 10 seconds.  So = after I=20 log off and wait a few cycles and log back on, every entry says that I'm = logged=20 on.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>So, my question is how can I determine = from a=20 service is a user is logged on to a workstation?  Is this the = correct track=20 to pursue or is there another way?  = Thanks.</FONT></DIV></BODY></HTML> ------=_NextPart_000_0016_01C565D5.150CD890-- Tag: String manipulation Tag: 97303
  - 18
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  - 21
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  - 22
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  - 23
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  - 24
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  - 25
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I am using Microsoft.VisualBasic.Strings.InStr() and
Microsoft.VisualBasic.Strings.Mid() to manipulate strings.

Is there a better way ? i.e. by using the framework.

Thanks,
Craig

Top

Re: String manipulation by Mattias

Mattias
Fri Jun 03 06:59:48 CDT 2005

>Is there a better way ? i.e. by using the framework.

I'm not saying they are better, but you can use the String.IndexOf and
String.Substring methods.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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Re: String manipulation by cody

cody
Fri Jun 03 07:11:41 CDT 2005

use string.IndexOf instead of InStr and string.SubString instead of Mid.

"Craig HB" <CraigHB@discussions.microsoft.com> schrieb im Newsbeitrag
news:3C1A8292-7FED-4E51-823A-789EDCD3AB71@microsoft.com...
> I am using Microsoft.VisualBasic.Strings.InStr() and
> Microsoft.VisualBasic.Strings.Mid() to manipulate strings.
>
> Is there a better way ? i.e. by using the framework.
>
> Thanks,
> Craig
>

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Re: String manipulation by Jon

Jon
Fri Jun 03 14:00:46 CDT 2005

Craig HB <CraigHB@discussions.microsoft.com> wrote:
> I am using Microsoft.VisualBasic.Strings.InStr() and
> Microsoft.VisualBasic.Strings.Mid() to manipulate strings.
>
> Is there a better way ? i.e. by using the framework.

Yes - using the methods of the String class will make your code far
more idiomatically .NET, rather than looking more like classic VB. You
*may* gain some performance, but more importantly your code will be
more readable to people from other .NET languages.

--
Jon Skeet - <skeet@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

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