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I'm just going to drop a little something you might not know about SendKeys an d then step out.
SendKeys does NOT guarantee that the window that has the function when SendKeys starts executing is the window that gets the keystrokes. If another window pops up anywhere in the system, like a dialog box from a service monitor or another application, SendKeys will send your keystrokes to whatever window has the focus, including those other dialogs that are not part of your application!
Just a little food for thought. You may want to really think twice about using SendKeys.
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Yeah, I'm aware of this, and I do not believe that is not what is causing the program to ignore the tilde.
I have been searching around on google, but cannot find any alternatives really.
What are good alternatives to SendKeys?
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I never said it was the cause of your problem, only that there are pitfalls to using SendKeys.
The most direct method is to craft key messages and send them directly to the application that is supposed to receive them using SendMessage. You can find examples and discussion on the technique here[^].
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I have a datagridview that items are being added to it. I have the code to check if the item has already been added. If the item has been added then I want to put that row into text boxes for editing.
Here is the code that locates the item that has already been added.
foreach (DataGridViewRow datarow in purchase_Order_ItemsDataGridView.Rows)
{
if (datarow.Cells[2].Value.ToString().Equals(part_NumberComboBox.Text))
{
datarow.Selected = true;
}
}
I have a form with text boxes to populate from the datagridview row for editing. I have tried this line of code to identify the row in order to get the data into the text boxes.
DataGridViewRow duprow = purchase_Order_ItemsDataGridView.CurrentCell.OwningRow; I end up with this unhandled exception ' Object reference not set to an instance of an object'.
I have been running in circles for a couple hours now and all I want to do is see if a duplicate is being added to datagridview and do something about it.
Thanks for the help
In the end I simply placed a messagebox after the datarow.Selected = true; and after the messagebox I used return; to exit the code block.
modified 8-Feb-15 23:15pm.
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It should be easy enough to step through your code in the debugger to see which reference is not being set (duprow?). What are the values of CurrentCell and OwningRow in the above code?
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As I stepped thru the code I realized that duprow is not being set. In fact I don't even need that line of code. The duplicate line in datagridview is identified with the line of code just before.
I can see now that I will be using a different method of locating a duplicate entry into datagrid view or use the datarow.Selected = true to process the notification to the user of a duplicate entry.
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How to use dialog and divc tag in ASP.Net MVC 4
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<dialog> is just an element you use in your views. There is nothing in MVC that prevents you from using it in your markup, but there is nothing that generates it either. You just wrap whatever code you want in a dialog element, then use a technology like jQueryUI-dialog to utilize it.
I've never heard of divc, and can find no reference to it.. so not sure what you're referring to.
--
Where are we going? And why am I in this handbasket?
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HI,
Everybody
I have read the articles,it's Great...
But i want more explanation about Stack and Heap with
Simple example???
Thanks...
IN Advance...
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What do you want to know?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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I'm in intermediate level of C#, I know all the essentials very well, and OOP, I also know the essentials of LINQ, XML, and SQL. But however I'm not that good in practice, I'm thinking to stop learn new things, and concentrate on practicing and learn through it, but I don’t know from where to start! Most books do this but for beginners and then I spend a lot of time time in reading things I know well. So I want sources that concentrate on practicing and developing real projects, with skipping the essential stuff. I want sources to fit my level, or any suggestions from you.
please help me with your experience.
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Go to the articles section here on CodeProject and look at some of the more advanced subjects.
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Find something you want to code and start coding. I learn best by doing. You could even help out on an Open Source project. You just have to push your boundaries.
--Edited--
Sounded kinda harsh.
Jack of all trades, master of none, though often times better than master of one.
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In my opinion the best way to learn something is to do a project that you are interested in.
There are only 10 types of people in the world, those who understand binary and those who don't.
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I've known programmers you get stuck reading books and articles. It's like reading techniques on painting. You will not get any better at painting until you keep painting. Same applies to programming.
Enough with the reading! 
Start build apps, a TODO list, with a SQL Backend; or maybe an application that connects to Facebook. Once you build the apps, reflect on the apps from a OOP perspective and performance algorithm. How can you improve the app? Then on the next project apply what you learned. Be flexible, don't be afraid to try something new. But don't get too much into reading. Just pick it up, and start coding!
Something very crucial is to do short projects. Don't try to do to many things. Limit yourself to one project a week, and then move on. Before you know it, you will have learned so much from building those apps!
H.B.
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Hi All
First of all, sorry for my bad english and forgive if my question is'nt so clear.
I'm developing a series of classes to create a framework for my job.
I created this series of class:
baseform : from (empty form)
inputform : baseform
in this form i added two buttons
btnOk & btnAbort
on click these buttons calls two virtual methods that returns a bool, the two methods are respectively ExecuteOK() & QueryAbort()
BrowseForm:inputform
in this form i adedd only a grid ....
Finally in the executable i created a class, BRWTEST, derived from BrowseForm that override the ExecuteOK() method.
When i execute the project with my suprise i see that pressing OK Button (btnOK) the method called is inputform.ExecuteOK and not BRWTEST.ExecuteOK()
I have tested in another solution using simpler classes (in the framework there are many other classes) the same hierarchy ... and double surprise the behavior is correct ... derived class, pressing ok button call override method() ....
So my question is ... can you suggest me where i'm in error ? i have compared the two solution but nothing ....
Please help me
Last Thing ... i'm using SharpDevelop but i don't think that this can be affect the result.
Ask me if some things are not clear.
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OK: I just tried exactly what you did in VS:
public partial class InputForm : BaseForm
{
public InputForm()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Console.WriteLine("Click");
Console.WriteLine("{0}", ExecuteOK());
}
public virtual bool ExecuteOK()
{
Console.WriteLine("InputForm:ExecuteOK");
return true;
}
}
public partial class BrowseForm : InputForm
{
public BrowseForm()
{
InitializeComponent();
}
public override bool ExecuteOK()
{
Console.WriteLine("BrowseForm:ExecuteOK");
return false;
}
}
And then created an instance from my main form:
private void button1_Click(object sender, EventArgs e)
{
BrowseForm bf = new BrowseForm();
bf.Show();
}
I click button1 in my main form, and the BrowseForm shows.
Click the ok button in the Browse form, and I get what I expect:
Click
BrowseForm:ExecuteOK
False
So...what have I done different to you?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Your code is essentially like my code ... but .
In my Solution there are many dll the BaseForm and InpuForm are in the same dll same namespace. The Browseform class is in another dll with same namespace.
I think that this is the only real difference with your code, but in the other simplified test solution i reproduced same namespace ecc.. and all seem work ok but in the working solution the things don't work.
i don't know where i can throw my head!
The solution is big. But if you think i can send the entire solution.
Thanks anyway in advance.
ps:
another difference i don't istantiate direcly browseform in the xecutable project, but i create another class derived by browseform and use that class, but i think that this is not a problem.
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Deriving another class and instantiating that shouldn't make any difference (and doesn't, I just tested it)
Using it from "another dll with same namespace" opens up some possibilities though.
The first one which springs to mind is does the BrowseForm exist in the "main" Assembly as well as in the DLL? Because if it does there is a good chance the system will be calling that one rather than the DLL version. If that doesn't override ExecuteOK, it would give the results you get.
The second is simpler: has the other DLL been compiled since the ExecuteOK was added, and are you using the correct version? I have to say, using the same namespace in two different assemblies is not something I'd want to do: To my mind, it's going to be confusing to coders, never mind the system!
I generally keep to "one assembly, one namespace", and although occasionally I'll have more than one namespace in an assembly, I don't like it, and wouldn't want to "split" a namespace across assemblies.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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First of all
I beg your pardon because (predictably) my error was a my big distraction error.
At the same time thank you very much.
My error wasn't in the costruction of dll's or the classes (i have a different namespace for any dll, not namespaces between dll) i was concentrated to see th error in the intermediate classes, but the error was in the exe project ... infact i instantieted the browseform class and not the last derived class with overriden method().
I discovered this only because i tried to get the various code in a notepad for posting it ... and i saw the elephant.
Thanks again.
Emanuele
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Yeah, reading the code you meant to write... I do it as well 
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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1)No connection could be made because the target machine actively refused it
2)
System.Data.SqlClient.SqlException was unhandled
Message=Login failed for user 'sa'.
Source=.Net SqlClient Data Provider
ErrorCode=-2146232060
Class=14
LineNumber=65536
Number=18456
Procedure=""
Server=.
State=1
StackTrace:
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at TrustedParty.Keydistribute.button1_Click(Object sender, EventArgs e) in E:\E DRIVE\all proj-rar files\SKIT\TrustedParty\Keydistribute.cs:line 111
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at TrustedParty.Program.Main(String[] args) in E:\E DRIVE\all proj-rar files\SKIT\TrustedParty\Program.cs:line 22
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
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So, put a break-point at the start of your code, single-step through it using Visual Studio (F11) when it hits the break-point, and then include in your post here on what line the error occurred.
«I'm asked why doesn't C# implement feature X all the time. The answer's always the same: because no one ever designed, specified, implemented, tested, documented, shipped that feature. All six of those things are necessary to make a feature happen. They all cost huge amounts of time, effort and money.» Eric Lippert, Microsoft, 2009
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