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Can someone point me to a good article on how to subclass form and control objects? I want to take the base form and base form controls such as textboxes, listboxes, grids, etc. and create my own subclasses and store them in a library. Then I want to be able to easily refer to them on the toolbar instead of the base class objects when I design my applications.
Thanks!
Jim
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Do you want some custom properties in the controls?Then you need to derived classes from textboxes, listboxes, grids, etc and add you properties and mathods.
Cheers!!
Brij
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What I want to do is to first subclass the base form in .Net and add properties and methods to it that my app will use when I develop a module. Then I want to do the same thing with textboxes, comboboxes, and any other typed of control that I can place on a form. I want then to be able to (at design time) see and select my derived/subclassed objects, including the form on the toolbar and be able to select from that list.
I understand this is possible but I've not found an article on how this is done. Can someone point me to an article out there I can get to that will describe in detail how to do this?
Thanks!
Jim
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Hi I have a problem that I cannot figure.
I have stripped the code down to a few lines that show the issue below.
Basically I have a worker thread that obtains an object and then makes a method call on that object that works fine. But when I return the object to the parent thread, from the parent thread the method call on that object fails. This is the problem. I have a guess about why it fails, but am not sure how to resolve it.
It may be that I need to do something extra to marshal the object back to the parent thread (as you can see I am not doing anything at all right now)
If the worker thread isn't marked as STAThread then the method call in the worker thread fails too, indicating that there is COM stuff going on in the background. I guess the problem is that the underlying object returned creates a COM object in the worker thread's apartment. When the object is invoked from the parent thread the method fails because the underlying COM object doesn't belong to the apartment of the parent thread. Does that sound at all correct?
Is there any way to resolve this?
class Program
{
static AutomationElement searchResult;
[STAThread]
static void ThreadFunc()
{
searchResult = FindObject();
searchResult.FindAllChildren();
}
[STAThread]
static void Main(string[] args)
{
Thread t = new Thread(new ThreadStart(ThreadFunc));
t.SetApartmentState(ApartmentState.STA);
t.Start();
t.Join();
MyObject obj = searchResult;
obj.FindAllChildren();
}
}
}
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Please specify what is fail? An Exception ? Do you have any error messages?
Natza Mitzi
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Thanks for the reply. No exceptions occur, the fail is simply that it returns an empty array instead of an array of its children.
Since my post I have also discovered that some of the properties like Name, etc of the AutomationElement object also return empty values when called from the other thread. What appears to be happening is the AutomationElement in this case is only valid in the thread it was created in.
AutomationElement is a .Net class, I have no visibility of it's implementation, but perhaps in this case it's using COM objects internally which and these only work in the thread they were created in.
I was expecting .Net would take care of that kind of thing and marshal whatever it needs over to the other thread. Guess I am mistaken. Although really that's part of my question. Perhaps someone can come along and say "no, .Net will marshal it all, it must be some other problem" or "yes that's right you can't expect this to work from another thread" and hopefully someone will say "but here's how you could do it"
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Hello everyone,
Is it possible to define resources (like messages in different language translations, different title for the same person in different application scenarios) into a separate file (DLL or some other forms are both fine)? So that when we code, we just need to care about message ID and developer could separate from what the message ID actually maps to different messages in different languages or different scenarios (message ID will map to different message during runtime in different application scenarios)?
thanks in advance,
George
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I think that I understand your Q. I dealt with an issue similar to what you are describing.
You can use resource files for the actual messages one per language (do this in the UI layer or presentation layer) and use an enum for error codes in the logical layer. implement a method that picks the correct message field and the resource manager will pick the language for you.
Natza Mitzi
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Thanks for your advice, Natza!
I think using satellite assembly could solve my issue. 
regards,
George
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Hi,
i am working on fees management system,where i have task to print the fee voucher of whole class student,i created feesVoucher.rdlc it is a template of fees voucher. it also show the data of single student.But how to i print the whole student fees voucher by using of single report.please suggest me.
thanks
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Create a new report, put what you have in the single report in a repeating area and change the dataset to select all the students.
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according to you..."subreport" is solution??
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That is one way to do it, but not necessary - you can write the report any way that you need to. Unless i have misunderstood your requirements?
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i want to make a control of form, something like master form. eg. I added some pictures, labels in a form, now i want to use that form in every form in my app. So to do that i add a project, add pictures and labels in that form and set its output type to 'Control Library', built it and its reference in project but its not appearing in that namespace. Any idea ?
P.S. For confusion, I clear that I do not want to add it 'Add New Item' Dialog
thanks
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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have u added that in the refrence of ur project in which u want it to use
rahul
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When adding a reference to a project you don't see the 'members' off that reference (so you don't see the classes, forms,controls,...) in the solution explorer.
The way to do what you want is either create the form dynamicly (in code) or add a form to your project that inherits from you form in the referenced dll (add new item --> inherited form --> chose your form)
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dude listen, i've tried every way to put that form inside my project. But damn thing is that other classes and components are appearing just form isnt even the modifier is public.
Edit :
Found it.
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
modified on Tuesday, December 30, 2008 7:56 AM
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the easy way u can use that control like other .Net Controls is simply a few steps as follows.
>Right Click on the ToolBox pane and select Choose Items...
>from Choose ToolBox Items Dialog refer to .Net Framework Components
>Click on Browse button and find the .dll of the Control Library "the one u created as a control"
>Click OK button.
now that control is available in the toolbox pane as other controls.
Abdul Rahaman Hamidy
Senior Student Student in Computer Science
Kabul, Afghanistan
Software Developer
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how do we daclare an array in a struct?
thanks
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You have got enough replies here[^]. Please follow the same thread and don't re-post.
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sorry, cause i haven't found the solution yet
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It's rude to ask the same question again. Also, you've been given the answer in your first post - namely that there's no "proper" solution for what you're trying to do.
modified 12-Sep-18 21:01pm.
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Hello All,
In order to display a combo with all servers on my domain, I am using this code:
string domainName = Environment.UserDomainName;
DirectoryEntry domain = new DirectoryEntry(
String.Format("LDAP://{0}/CN=Computers,DC={1},DC=com"
, domainName
, domainName));
foreach (DirectoryEntry child in domain.Children)
{
this._comboBoxServers.Items.Add(child.Name.Substring(3));
}
domain.Dispose();
At the begining it worked great, until it stoped returning the full list and returns only one computer "BEServer".
When I open an Explore window to look at my network places, in the domain I just retrieved sometime see the all the computers of the domain and sometimes only one icon "UTSC".
Does anybody have a clue ???
Thanks
Calanit
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Maybe someone has a different way to get servers list ?
modified on Tuesday, December 30, 2008 8:35 AM
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I have a project that's web service includes virtual directory and to call the virtual directory in the project ı create an asmx file called 'Directory' and when try to run the asmx on the web, ı got this error.
Besides this, in the project, i declared the virtual directory in the localhost(as in default web site), but i will publish the project, and when users install the program to their pc's, can they see and use the virtual directories in the server. When i research on the web, i see the virtual directory is only in the localhost Can i declare the virtual directories on specified web service like:
"IIS://LocalHost/w3svc/1045426499/Root/Data/",@"c:\Program Files\xxxxx\yyyy\Data"
Could you help me, please!
The error:
Server Error in '/' Application.
--------------------------------------------------------------------------------
Cannot serialize member System.ComponentModel.Component.Site of type System.ComponentModel.ISite because it is an interface.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NotSupportedException: Cannot serialize member System.ComponentModel.Component.Site of type System.ComponentModel.ISite because it is an interface.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[NotSupportedException: Cannot serialize member System.ComponentModel.Component.Site of type System.ComponentModel.ISite because it is an interface.]
[InvalidOperationException: Cannot serialize member 'System.ComponentModel.Component.Site' of type 'System.ComponentModel.ISite', see inner exception for more details.]
System.Xml.Serialization.StructModel.CheckSupportedMember(TypeDesc typeDesc, MemberInfo member, Type type) +889837
System.Xml.Serialization.StructModel.GetPropertyModel(PropertyInfo propertyInfo) +134
System.Xml.Serialization.StructModel.GetFieldModel(MemberInfo memberInfo) +129
System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter) +1226
System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter) +460
System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter) +223
System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter) +460
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter) +1415
[InvalidOperationException: There was an error reflecting type 'System.DirectoryServices.DirectoryEntry'.]
System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter) +1621
System.Xml.Serialization.XmlReflectionImporter.ImportAccessorMapping(MemberMapping accessor, FieldModel model, XmlAttributes a, String ns, Type choiceIdentifierType, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +10296
System.Xml.Serialization.XmlReflectionImporter.ImportMemberMapping(XmlReflectionMember xmlReflectionMember, String ns, XmlReflectionMember[] xmlReflectionMembers, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +722
System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(XmlReflectionMember[] xmlReflectionMembers, String ns, Boolean hasWrapperElement, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +236
[InvalidOperationException: There was an error reflecting 'GetVirtualDirResult'.]
System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(XmlReflectionMember[] xmlReflectionMembers, String ns, Boolean hasWrapperElement, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +843
System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(String elementName, String ns, XmlReflectionMember[] members, Boolean hasWrapperElement, Boolean rpc, Boolean openModel, XmlMappingAccess access) +130
System.Web.Services.Protocols.SoapReflector.ImportMembersMapping(XmlReflectionImporter xmlImporter, SoapReflectionImporter soapImporter, Boolean serviceDefaultIsEncoded, Boolean rpc, SoapBindingUse use, SoapParameterStyle paramStyle, String elementName, String elementNamespace, Boolean nsIsDefault, XmlReflectionMember[] members, Boolean validate, Boolean openModel, String key, Boolean writeAccess) +223
System.Web.Services.Protocols.SoapReflector.ReflectMethod(LogicalMethodInfo methodInfo, Boolean client, XmlReflectionImporter xmlImporter, SoapReflectionImporter soapImporter, String defaultNs) +2989
[InvalidOperationException: Method Directory.GetVirtualDir can not be reflected.]
System.Web.Services.Protocols.SoapReflector.ReflectMethod(LogicalMethodInfo methodInfo, Boolean client, XmlReflectionImporter xmlImporter, SoapReflectionImporter soapImporter, String defaultNs) +6527
System.Web.Services.Description.SoapProtocolReflector.ReflectMethod() +91
System.Web.Services.Description.ProtocolReflector.ReflectBinding(ReflectedBinding reflectedBinding) +1798
System.Web.Services.Description.ProtocolReflector.Reflect() +703
System.Web.Services.Description.ServiceDescriptionReflector.ReflectInternal(ProtocolReflector[] reflectors) +394
System.Web.Services.Description.ServiceDescriptionReflector.Reflect(Type type, String url) +109
System.Web.Services.Protocols.DocumentationServerType..ctor(Type type, String uri) +156
System.Web.Services.Protocols.DocumentationServerProtocol.Initialize() +284
System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response) +50
System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing) +77
[InvalidOperationException: Unable to handle request.]
System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing) +285
System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response) +183
[InvalidOperationException: Failed to handle request.]
System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response) +354
System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath) +212
System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated) +47
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +193
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +93
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
mkn
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