C# - WPF: Custom Command Not Working?
Dec 3, 2010
In my XAML I have this:
<UserControl.CommandBindings>
<CommandBinding Command="Help"
CanExecute="HelpCanExecute"
Executed="HelpExecuted" />
</UserControl.CommandBindings>
[Code]...
But i get the error: Cannot convert string 'MyCustomCommand' in attribute 'Command' to object of type 'System.Windows.Input.ICommand'. CommandConverter cannot convert from System.String. What am I missing here? And please note that I want to do it all in XAML, i.e. don't want to use CommandBindings.Add(new CommandBinding(MyCustomCommand....
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Sep 29, 2011
I have an SQL command I am attempting to execute.The syntax is as follows
[Code]...
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Jun 11, 2011
I have a piece of code that takes two strings, puts them together, then attempts to save that result into a table in a database. For some reason, the database is only showing the second half of the string ( Me.txtRev.text in this case). When in debug, I can see that newRev is actually correct, with the hyphenated string.
Dim newRev As String = Me.revs(0) & "-" & Me.txtRev.Text
Try
Dim sqlSOPDept As New SqlClient.SqlCommand
[code].....
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Dec 13, 2009
I have been making a text based noughts and crosses game and trying to convert an alpha grid reference into a number to run the logic sequence that decides whether the an input is valid. I am using the asc command to convert but it just keeps putting up the error: Conversion from string "a" to type 'Double' is not valid, when it reaches the line If (Asc(Left(choice, 1)) >= 65 And Asc(Left(choice, 1)) <= 67) Or (Asc(Left(choice, 1)) >= 97 And Asc(Left(choice, 1) <= 97))Choice is the input and has already been checked for length, whether it contains an alpha and numeric input (and where they are) and whether the numeric value is valid.
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Apr 20, 2011
why the doc.Save("filename.xlm") might not be working? Trying to do a simple routine - just loading an existing xml file and saving as another name onto local C: drive. Seems to run ok ie no errors, but the file doesn't save. 'Save' part of the doc.Save command is coming up as a different type colour in dreamweaver.
Also, secondary problem, getting error if use a long directory name in the doc.Save destination filename - comes up with 'URI formats are not supported'
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Jul 22, 2011
the codes run with no errors, but the data is not save in the sql server table event though the codes run.Dim connection As New SqlClient.SqlConnection
connection.ConnectionString = ("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\DB.mdf;Integrated Security=True;User Instance=True")
connection.Open()
Dim command As New SqlClient.SqlCommand
command.CommandText = "INSERT INTO [studentsummary] (sum1,sum2) VALUES (@sum1,@sum2)"
command.Connection = connection
[Code]...
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Mar 27, 2012
i have my insert command but when ever i run it and click the button i get the messge "ExecuteNonQuery: Connection property has not been initialized." Here is my code:
Private Sub btnRent_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRent.Click
Dim constr1 As String = "Provider=Microsoft.ACE.OLEDB.12.0;" & "Data source = test.accdb"
[code]......
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Mar 20, 2012
i have use this code to search the records of my datagridview and put it on my datetimepicker, there's no error occuring but it's not working either?
Public Sub SelectRecordM()
Try
Dim dbConn As OleDbConnection
Dim dbSelect As New OleDbCommand()
[code]....
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Dec 13, 2011
I am using VB 2005 and the following code returns an error: No value given for one or more parameters. I swear I've done this before without any problems but I can't find my original code.[code]I tested the value of oldid which is set earlier and it does have a value.
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Mar 15, 2012
I'm experimenting with the sql command builder and it seems to do nothing when trying to update existing rows. If I create a new row and then add it then it works fine but I cant seem to update an existing record.
Heres what I have at the moment
Code:
Dim strConnection As String = "Server=myServerSQLExpress;AttachDbFilename=C:databasepath estdb.mdf;" & _
"Database=testdb; Trusted_Connection=False;User Id=sa;Password=test;"
[CODE]...
But I'd really like to find out why its not working when using the command builder. I'm working with VB.net 2010 express and SQL server express.
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Jan 30, 2010
[Code]...
I have a project with Access using datagridview on the vb 2008 express, I only have on table - sysdep(id,sysaccount,syspw), and insert, delete, update the record to the Access table. On this delete,
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Dec 2, 2010
I am having problems trying to get a rowcommand event to fire in a gridview. The code is below.
<asp:GridView ID="GridViewProducts" runat="server" AutoGenerateColumns="False"
BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px"
CellPadding="5" CellSpacing="1" DataKeyNames="Pkey"
DataSourceID="SqlDataSourceProducts" ForeColor="Black" GridLines="Vertical">
<FooterStyle BackColor="#CCCCCC" />
<PagerSettings PageButtonCount="20" />
[Code] .....
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Jun 24, 2006
My Find/Replace Edit Menu command inside VB 2005 is not working anymore, and SQL Server 2005 as well. When I tried to check this feature in Microsoft Office applications, there is no problem at all. It's mysterious, I don't know what happen. I also tried to re-install VB and SQL, but still it didn't work.I know it is a petty problem, but it plays an important role when editing your codes.
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Jan 3, 2012
[code]The application get stuck and keep waiting for a response when the above is excuted. I have tryed to execute the SQL command from SQL Management studio and it works fine and on another copy of the database.
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Aug 18, 2010
[Code].....
and yeah, its opening 7zip properly, its the command is giving an error in 7zip via vs2010, but not via cmd.exe directly.
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Dec 15, 2009
i'm building a Videoplayer custom control (Project called WpfCustomControlLibrary1) and want to add a Load Command.This is what i have added in my class to get this Command:
Public Class VideoPlayer
Inherits Control
...
Public Shared ReadOnly LoadCommad As RoutedUICommand
....
[code].....
i get an error that he cant convert the string in the Attribute "Command" into an Object of the Type "System.Windows.Input.ICommand
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Jan 30, 2011
Can VisualStudio VisualBasic be opened with a command line argument specifying a custom constant for conditional coding? Instead of specifying it at "properties > Compile > Adv Compile Opts > Custom constants", I would like to just run a .BAT file that opens VisualStudio/VisualBasic and my source code with the "Custom constant" already set for the conditional coding.
Software Developer
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May 11, 2009
Is it possible to add custom command in a shortcut (.lnk) menu (right button) through .net? How can i add the command and executed that command.?
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Dec 16, 2010
I already know how to make really basic custom controls where I can pass in new variables to treenodes because of my custom class, but it's not really working out well for me.I figured out how to read the new values & change them while their in the normal treenode because oddly enough once i've passed in an object from my custom treenode class it worked but I want to know a few things.
1.With my custom class, I can't do things like the following.
MsgBox(
New
TreeNode("Today").IsSelected)
If I replace with CustomTreeNode it doesn't work no matter what I do even working with sub/new it always shows a default value instead of what value is, the most I can think of is because sub isn't returning value, but you can't return value in subs, how are you meant to make lines like that work?
2.Also anyways just for sake of having good intellisense & workings is there a way I can make a class of CustomTreeView that's using my CustomTreeNode's so that I can work on things by code in the EXACT same manor I used to given the name is the same but have my new custom values?Currently im stuck passing any changes using the new type & taking it out I type cast over to the custom type again so i can read the values, but I just want was wondering what I need to do to make it work like a real control would.
Anyways is there any way to over-ride the default control or something instead so I can simply add the new variables in there? I want the same functionality of the normal control just with the added variables so I can work with data pertaining to the nodes of each item in the treenode easier.I already used the Tag value to store some information but it's not like that there are 100 different variables to store information & it's not like anyone wants to store lots of values in 1 variable & parse out the one you need, it's possible but if I can create something good here, I want to use whatever I can make instead of taking my time on working on a more painfully difficult to work with, at least later when I might even need even more variables stored pertaining to each of the items.
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Jul 28, 2009
I currently have 2 forms, one with a listview and the other with a button coded to add an item to the listview. I've just discovered though that any command, no matter how right the syntax, to a form from a different form doesn't work. The only command that does work is Form2.Show. Otherwise nothing happens. There are no errors whatsoever. All the items in each form are all set to public.
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Feb 1, 2011
I am trying to learn how to create Windows Forms custom controls in VB.Net by creating a .Net version of an old control I created in VB6. On this control, I have a UserControl with a Label (lblCaption), and several of the properties I add to the control should be passed to the label.This is the code I tried for the ForeColor property:
Code:
Protected mcolForeColor As Color = Color.FromKnownColor(KnownColor.ButtonHighlight)
Public Overrides Property ForeColor() As Color
Get
[code]....
When I change the ForeColor on the control in my test project, lblCaption does change to the color I selected; however, when I run the application, the label changes back to the default (button highlight) color, and the value of the property is also reverted back when I return to the form designer.What would be the proper way to implement the ForeColor property on a custom control?
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Sep 28, 2010
I have a stored Procedure
CREATE PROCEDURE sp_DescriptionLookup
-- Add the parameters for the stored procedure here
@manfactureid as int
[Code].....
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Aug 15, 2011
Asking for little guidance again... For my custom control, I grouped some properties in some class. Then in the main control code, I use:
[Code]...
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Feb 15, 2010
catalsyt control center can not be open im monitor display, the warning says command line intrface has stoped working already try to downlowload new dr
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Jan 13, 2011
I'd like to, let say "declare" my custom command, and what do I mean by command is something you type in the code, when for example you click a button. Just like Textbox (for example), my custom command sould have "underthings" in it, so just like I can type in Textbox1.Text. And that underthing (in this example, textbox is my custom command and .text is a sub/underthing) I can set if it is a boolean or string etc. I need this for my login program, where that custom command is an username (named username, what you can dim), and then it has sub things, like username1.email (string for e-mail text) and username1.password, username1.ismoderator (boolean, true or false). So an example, in my program I can do like this:
'Username is my custom command, just I don't know how to'define or declare it.'Username has here, to keep it simple, 2 sub things, it is'username.password and username.name Private Sub btn_registrate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_registrate.Click'When the button called registrate (make new username) is clicked Dim username1 As Username'(I don't know if it must be dim blabla as NEW or without new with'my custom command)username1.name = Textbox1.Text 'Textbox for username username1.password = Textbox2.Text 'Textbox for password
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Apr 30, 2010
First let me say that I am not sure whether or not this should go in this section or the API section, and if it needs to be moved I apologize. My issue is fairly straight forward, but for some reason I cannot get it to work.
I am trying to send a command to a command line and then submit the command. I have been trying without success to get this to work in v2008 Express and v2010 Express, Here is the code I am trying to us:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" ( _
ByVal lpClassName As String, _
ByVal lpWindowName As String _
[Code].....
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Mar 17, 2010
I am currently using psexec.exe from PsTools to send a command to a remote system to fire a command through a command prompt however I am finding that the shell I am doing does not seem to like the spaces in the path.
[Code]...
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Nov 8, 2007
Any ideas on how I handle the following error thrown in the SqlDataAdapter.Fill as a result of the BeginTrans in the callee?
System.InvalidOperationException = {"ExecuteReader requires the command to have a transaction when the connection assigned to the command is in a pending local transaction.The Transaction property of the command has not been initialized."}
[code].....
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Jun 30, 2010
Public Sub ExecuteTransaction(ByVal connectionString As String) Using connection As New OleDbConnection(connectionString)
Dim command
As New OleDbCommand()
Dim transaction
As OleDbTransaction
[Code]...
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Feb 24, 2010
I am using the following code to run defrag and to analyze if the C: drive requires defragmentation:
Dim analyze As Process = System.Diagnostics.Process.Start("C:WindowsSystem32defrag.exe", "C: /a /h /u /v")
This process runs through analyzing, runs it in normal mode & prints the progress to the command window.
My problem is that as soon as the process is complete the command window closes. I need it to stay open so that I can read the results.
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