I have a RichTextBox (txtCustomDict) ... and i am invoking it like so from another thread:
[Code]...
EDIT: Just checked and it does the same thing if i split it into 2 differently named subs then invoke the other sub
The function below will be called from another thread. So the control themselves will have to be invoked so that the correct thread that created them can change the properties.However, as I have many controls that need to be updated. I don't really want to write all those delegates for each one. I have done one below. [code]
View 1 Replies[Code] If I wanted to add 3 icons, the LV would add them like it normally would, but then, for some reason, it enters the loop again and that's when it throws this error: ex = {"Cross-thread operation not valid: Control 'ListView1' accessed from a thread other than the thread it was created on."}. I don't understand why, because I'm invoking the LV.
View 3 RepliesI have an app with which I populate a DataGridView named data. I have implemented threading in this app. Now both in debug mode (run through VS 2008 Express Edition), and without threading implemented the app works smoothly as it should. With threading and as a standalone .exe however, it freezes up. Not just anywhere, but as soon as 6 items are filled in the DataGridView (the top of the last one is only slightly visible). I have synclocked everything relating to the DGV, and am completely stumped.
View 7 RepliesI have a problem with my Visual Studio 2008 it often freeze when Im coding.. I go to event viewer and found this error:
.NET Runtime version 2.0.50727.3625 - Fatal Execution Engine Error (7A2F89BA) (0)
Last week my IDE work's fine ..but now it fails..
I got multithreaded scraper and it laggs alot and sometimes it freezes totally.
It works like this. Start Scraping -> Url List -> Scrape -> Add info to datagridview -> Verify info.
Im using threadpool on it. Any tips to make it lag free? What causes it, what I should not do etc?
Can we make the Combo Box not drop down if we click on it even though it have item in the list, button not click-able even though it have the on_click event..textbox not allow to set focus but not in disable mode...everything like design time.. because I want to do drag and drop control like visual studio.. but I can drag now, just when I want to click the control to drag, the control still remain the default function...
View 1 RepliesIve been working recently on a chat. Ive been using FTP to comunicate through both forms but it need to constantly download the new data and make the application freeze. Even with a Backgroundworker. So my question is : is there a way to keep a constant connection between the form and the host? And not LAN ,I mean that doesnt need to be on the same router.
View 1 RepliesI'm using loop to read data from sql and then make some calculations then save it again to another table but when application loop for 3 or 4 times it's freeze but the job is done but if loop = 10 or more then it is freeze and hangup for long time .i need to learn how to make my application working better and never freeze and make application working with any count for loop without freeze .
View 7 RepliesIf I put this code in the form, the mouse will be moved once. I want it to "freeze" the mouse at the point that its moved at. If I put code in timer (which it is now), the mouse will keep searching for the color, so the mouse moves around like crazy. How do I change my code so that it will "freeze" the mouse once it finds the color? [Code]
View 11 RepliesI am invoking a webservice and got this error..Do anyone know what is the exact problem..System.ServiceModel.Security.MessageSecurityException: An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail. ---> System.ServiceModel.FaultException: An error occurred when verifying security for the message.
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I am trying to dynamically create COM object, call COM method and set COM properties. The COM class is a VB6 ActiveX DLL. The implementation is exactly equal to the VB6 code from this page
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I am creating a bot ( for personal use ) to automate posting to my website . I have used the webbrowser control and i have managed to send data to the webform using the follwing code :
Dim elm As System.Windows.Forms.HtmlElement
For i As Integer = 0 To WebBrowser1.Document.All.Count - 1
elm = WebBrowser1.Document.All.Item(i)
If elm.TagName.ToUpper() = "INPUT" Then
If CType(elm,System.Windows.Forms.HtmlElement).Name="login_name" Then 'Get User ID Element
CType(elm, System.Windows.Forms.HtmlElement).InnerText = "username"
[Code]...
The code is supposed to fill to textfield on the form ,username and password . The webform also has a Button ,when clicked will LOGIN to the website .The problem is that i don't know how to invoke the login button on the webpage
I'm converting a VB6 app to vb.net.The code creates objects using the CallbyName function with the classes name & and method being read from a database.I want to rewrite the classes in vb.net and have the same behaviour as I read in the name of an object from the database, instantiate it, and call one of it's methods.I don't know ahead of time what the names of the classes will be, so I can't make a reference to them in my project.
View 1 Replieshere is my form code for the button i need to invoke PHP
<tr><td colspan="2" align="right"><input type="hidden" name="subjoin" value="1"><input type="submit" value="Join!"></td></tr>
this is part of my process.php which process the data given it, this determines the user is doing
[Code]...
How would I invoke a click event in a vb web browser without an id for the element?
View 1 RepliesI would like to know how to invoke the Windows Security Dialog (press ctrl+alt+del on a windows workstation NOTE: i dont want the task manager!) programatically.ON AN XP WORKSTATION, don't worry about Win7 or Vista with a quick example in C# (or VB.NET if you must)Ive searched many of the DLL's such as msgina.dll and i can't find it anywhere!
View 4 RepliesI'm calling a asp.net web page in a winform webbrowser control.The webbrowser is being used to take the user information and submit it the database, creating an item On the winform I have a submit button that invokes ("click")
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If I look at the webpage source, the hidden value is populated with an value. I think posting the value on to another page will fix my issue, but I want to avoid doing that.
I'm making a little program in where i'm trying to invoke a method from a class dynamically with so called Reflection.The class I'm trying to call is called ContactList and i try to invoke the method in this class called count. The assembly itself is called Contact.ExeNow I have the following code:
Public Function InvokeContacts() As Integer
Dim ContactsAssembly As Assembly = Assembly.LoadFrom("Contacts.exe")
Dim Mycontactlist As Type = ContactsAssembly.GetType("ContactList")
[code]....
I am loading an assembly dynamically and invoking a static method from it. The problem arises when the method uses a reference which is not trivial (e.g. mscorlib or System.Core) - I get System.MissingMethodException. I have tried going through the references assemblies of the loaded assembly and manually loading them all, thus forcing them to be loaded onto the AppDomain. I have checked CurrentDomain.GetAssemblies, the assemblies are loaded.
View 1 RepliesI'm trying to implement sql dependency in my vb.net application as per: [url]. I'm having problems with the invoking code, when a notification is received the application locks up with no errors. (When MyOnChanged is called via the delegate). Have I made a mistake in my C# > VB.net conversion? [Code]
View 2 RepliesI am attempting to fill the zip code through on Target Mobile Find in Store and click the GO button. However the button does not have an ID when I look at the HTML. I am able to fill the zipcode text box using:
WebBrowser1.Document.GetElementById("zipcode").Inn erText = txtZip.Text
but I cannot figure out how to click the button. I've tried using sendkeys.send("{enter}") but that doesnt seem to do anything.How can I either send the enter key after filling the zipcode or click the button?
Based on the title I'm sure you all understand what I want... So, I need to work with CMD through my app. and I searched google and vbforums and I found some solutions but none of them helped me because all I found was either older version like VB.net 2005 like this topic HERE (and this is exactly what I want) and found some in other languages like c# or c++ that I really don't now them..
View 3 RepliesI need to trigger the onmousedown property of a table contained on a web page presented in the WebBrowser control of my form.The site is a nested frames mess, but in this particular frame the tables are basically used to create large, context buttons. In other words, you click the table and are navigated to a subform.[code]At first I thought this might be handled by using InvokeMember("click"), but that has no effect. If I try InvokeMember ("onmousedown") I receive a javascript error on the page. Can anyone tell me if/how one invokes the onmousedown property of an object inside of the WebBrowser control?
View 4 RepliesI have an interface ITest with a method GetResult(). I have a class Test which implements ITest and thereby defines private method GetResult().
Next I create an instance of Test in a different class. The code is as below:
Module NewClass
Public Sub New()
Dim i As ITest = New Test()
[Code]....
I am migrating existing code from VB 6 to VB.NET and hence I'm not supposed to change the access modifier of GetResult. Leaving it Private will throw InvalidCastException Unable to cast object of type 'System.Object' to type 'ITest'
Object type variable o is used in many places and hence I don't want to change that. And yes, Test implements ITest.GetMember with a different name.
The VB application is automatically getting closed whenever the code is invoking any common dialoge control especially when the MS office Enterprise edition 2007 is installed.
View 1 RepliesAfter debugging a particularly tricky issue in VB.NET involving the order in which instance variables are initialized, I discovered that there is a breaking discrepancy between the behavior that I expected from C# and the actual behavior in VB.NET.Nota bene: This question concerns a slight discrepancy in the behaviors of VB.NET and C#. If you're a language bigot that is unable to provide an answer other than "that's why you should use C#, noob", there is nothing for you to see here; kindly move along.Specifically, I expected the behavior outlined by the C# Language Specification (emphasis added):
When an instance constructor has no constructor initializer, or it has a constructor initializer of the form base(...), that constructor implicitly performs the initializations specified by the variable-initializers of the instance fields declared in its class. This corresponds to a sequence of assignments that are executed immediately upon entry to the constructor and before the implicit invocation of the direct base class constructor. The variable initializers are executed in the textual order in which they appear in the class declaration.
Contrast that with the portion of the VB.NET Language Specification concerning Instance Constructors, which says (emphasis added): When a constructor's first statement is of the form MyBase.New(...), the constructor implicitly performs the initializations specified by the variable initializers of the instance variables declared in the type. This corresponds to a sequence of assignments that are executed immediately after invoking the direct base type constructor. Such ordering ensures that all base instance variables are initialized by their variable initializers before any statements that have access to the instance are executed.
The discrepancy here is immediately obvious. C# initializes class-level variables before calling the base constructor. VB.NET does exactly the reverse, apparently preferring to call the base constructor before setting the values of instance fields.If you want to see some code, this related question provides a more concrete example of the divergent behavior. Unfortunately, it does not provide any hints as to how one might coerce VB.NET into following the model established by C#.
I'm less interested in why the designers of the two languages chose such divergent approaches than I am in possible workarounds for the problem. Ultimately, my question is as follows: Is there any way that I can write or structure my code in VB.NET to force instance variables to be initialized before the base type's constructor is called, as is the standard behavior in C#?
Is it possible to call a protected method via reflection. I am using this:
Me.GetType.InvokeMember(Stages(CurrentStage),
Reflection.BindingFlags.InvokeMethod,
Nothing,
Me,
Nothing)
Which always calls a method with no params or return. The idea is that the user of my object (transactional processing of business logic) inherits the base class adds in a load of private methods to fire. They then add these method names to a list in the order they would like them fired and the code above will take care of firing them.
It works fine with public methods but not with private or protected methods in the same class (Protected because I have some 'standard' pre built methods to add to the base class). Realistically I could make the methods public and be done with it but my inner nerd wont allow me to do so...
I am assuming this is a security feature. Is there a way to get around this or does anyone have any suggestions on how to proceed but keep my tasty, tasty visibility modifiers in tact?
(NOTE: ITS IN VB.NET but a C# Answer is fine if that is what you are comfortable with).
I have some code that broadly looks like the following ...
WebBrowser1.Document.All("btn_submit").InvokeMember("click")
WebBrowser1.Document.GetElementsByTagName("select").Item("id_pickupdate").SetAttribute("value", "2011-07-07")
I cannot seem to get it to work in one code routine. I end up having to have a separate button to set the date after the page has loaded. I have tried all the blog posts using isbusy, timer etc but it does not seem to work. The code breaks and the error prompt says that id_pickupdate does not exist.
I have a dgv, I populate it, and I insert a row at the pos 0. And I want to freeze this row even when the user sorts the dgv.
How can I make this? The frozen property alone seems to be not enough.