Saturday, 17 May 2008
|
| Instance vs Static + Option Brady Kelly 23:57:33 |
| | I am busy with a new ConfigHelper class, and can't seem to decide on which
approach to take. The class is responsible for adjusting the config table
in two databases, control and test. My dilemma is whether I make
ConfigHelper a static class, and tell it which database to access for each
task, or use instance methods and have one instance for each database.
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| |  12 answers | Add comment |
Tuesday, 13 May 2008
|
| Simulating a Right Click Amit Bhatnagar 19:51:53 |
| | Hi All.
I have a touch screen application where there is a need to perform a
right click to expose context menus etc. The app's main point of
interaction is a "toolbar" of buttons at the bottom of the screen (think
Mac OSX dock, or Gnome/KDE panel, etc), so I imagine sticking a Right
Click button down there.
But how would this work? I imaging sending a WM_ message for right
click, but if the user moves the cursor to the target of the right
click, and then has to press a button on the toolbar, the cursor is no
longer on the target and thus the right click message would happen on
the Right Click button on the toolbar. Essentially what I am saying is
that the cursor would move off the target object down to the toolbar
button when the right click message would be sent.
How can I have a button that I can press to perform a right click
without having the cursor move away from the target object?
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| | 6 answers | Add comment |
Saturday, 10 May 2008
|
| Access UserControl Gabriel 01:53:24 |
| | Hello,
I created a UserControl (MyUserControl.ascx). At design time I added this
control the a page (MyPage.aspx). No problem when I execute the page I see
it.
I'd like access to some method and properties from MyPage.aspx.cd (first
form Page_load but may be others).
Could you tell me how to access the method of my UserControl ?
Regards,
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Tuesday, 6 May 2008
|
| Hook Control Host Container Messages Brady Kelly 13:50:12 |
| | I'm busy with a bar code reading retail app, and I would like to encapsulate
the code that responds to bar code inputs in a Bar Code control / component
/ library. I use a special character string to prefix bar codes, so the UI
knows to give the bar code field focus before the barcode is sent, and a tab
to leave the barcode field after the whole barcode is received.
If I were to wrap the barcode field in a separate control, how could I
delegate the responsibly of detecting the start-of-code string to this
control, when it doesn't have focus and doesn't receive keystrokes. I'm
thinking along the lines of it installing some sort of message hook in its
parent control, and focussing itself when it sees its parent receive the
start-of-code string, but I have no idea where to start.
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Wednesday, 30 April 2008
|
| How to create flyout menu Steve Abaffy 20:21:32 |
| | How do you create flyout menus like the ones they have in Photoshop in a
Windows form application. I want to have buttons and when you hold the mouse
button on a button without releasing the button it would activate the flyout
menu which would hold more buttons.
The only thing I have been able to find so far is for use on web pages.
Thanks
|
| | Add comment |
|
| Unsafe Assembly Permissions Brady Kelly 19:46:14 |
| | We're struggling to register an unsafe assembly on a development server.
The message given is:
CREATE ASSEMBLY for assembly 'Pastel.Evolution' failed because assembly
'Pastel.Evolution' is not authorized for PERMISSION_SET
Now I remember running a grant, "USE Master GRANT EXTERNAL ACCESS ASSEMBLY
TO [SERVERNAME\User]" on my server, but the target server doesn't use
windows auth, and you can't grant rights to 'sa'. Any ideas on how we can
allow ourselves to register an unsafe assmemly?
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| | 1 answer | Add comment |
|
| Limit Rows in DataTable Brady Kelly 00:46:58 |
| | I have an application under test, where I iteratively reset an export batch
and then run the export for different configurations. For major testing, I
wish to test each config over the full monty, 70k documents exported, but
for dev testing I like to keep the rows in each section down to 500. Last
night in the interests of not breaking code, I was popping 'TOP 500' into
each query, but I'm sure there is a better way. Any suggestions will be
appreciated. I'm using a SqlDataAdapter to fill my DataTable objects.
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| | 4 answer | Add comment |
Thursday, 24 April 2008
|
| Web Server Requirements Brady Kelly 20:27:07 |
| | What would be a minimum spec for a web server with very modest usage, i.e.
about 20 concurrent users, and what would be a good spec, maybe looking at
reserve capacity for growth to say 50 concurrent users? I don't know where
to start looking, so I'm asking the web experts here.
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| | 1 answer | Add comment |
|
| Settings Reverting Brady Kelly 12:24:54 |
| | I have a small application that uses Properties.Settings to store connection
strings. My problem is that every now and again, the settings revert to
defaults. I haven't been able to narrow it down yet, but long ago, when
addressing this problem, I was advised to use the code below to prevent this
happening due to version numbers changing, I think, but it doesn't work all
the time, even without version numbers changing. I call UpgradeSettings
first in the Load event.
private void UpgradeSettings()
{
if (Properties.Settings.Default.CallUpgrade)
{
Properties.Settings.Default.Upgrade();
Properties.Settings.Default.CallUpgrade = false;
}
}
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Wednesday, 23 April 2008
|
| Checking for state's existence Mark Aurit 17:52:06 |
| | Where is the best place to test in asp.net apps that values placed in
state still exist (the person walking away from their browser after
logging in thing)? Putting the check in the masterpage seemed ideal, but
the page events fire first, so that isn’t a lot of help. Should I put
the validation into a base page inherited by each page? Or each page’s
Page_Load event? There is a lot of expertise here, I would like to hear
the best practices.
Thanks, Mark
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| | 12 answers | Add comment |
|
| StateServer Kris Shanmugam 08:47:49 |
| | We've been storing some audit data / site usage data by using the
Session_End event to persist some session data in a database. We cannot do
this when using a StateServer (out-of-proc) as this event is not
available. Any ideas on possible solutions when using a StateServer?
Thanks,
Kris
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Tuesday, 22 April 2008
|
| SqlDateTime.Parse not culture sensitive? Mark Griffiths 13:22:21 |
| | The SqlDateTime.Parse() method does not seem to be honouring the current
culture. I am in the UK and have checked that
System.Globalization.CultureInfo.CurrentCulture is set to "en-GB". I'm sure
everyone knows that in the UK we usually format our dates as dd/MM/yyyy.
From the immediate window:
?DateTime.Parse("1/2/2002").ToString("dd-MMM-yyyy")
"01-Feb-2002"
?SqlDateTime.Parse("1/2/2002").Value.ToString("dd-MMM-yyyy")
"02-Jan-2002"
DateTime.Parse works as expected, but SqlDateTime assumes a US format when
parsing the string.
Can anybody confirm this as a bug? or am I doing something wrong?
Mark
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Wednesday, 16 April 2008
|
| Funny with BackGroundWorker Brady Kelly 19:37:26 |
| | I'm using the code below to delegate a database restore to a
BackgroundWorker component. My problem is that the second time I execute
the restore, the private method RestoreDatabase is invoked twice. The click
event of the button isn't being invoked twice, so it's somewhere else. Any
suggestions?
private void SetupDatabase()
{
buttonDatabaseSetup.Enabled = false;
CurrentActionStatusLabel.Text = string.Format("Restoring
database {0}", WORKING_DATABASE);
DataToolBackgroundWorker.DoWork +=
DataToolBackgroundWorker_DoWork;
DataToolBackgroundWorker.RunWorkerAsync(new
MethodInvoker(RestoreDatabase));
}
void dt_ProgressChangeEvent(double percentComplete)
{
DataToolBackgroundWorker.ReportProgress((int)percentComplete);
}
void DataToolBackgroundWorker_DoWork(object sender, DoWorkEventArgs
e)
{
MethodInvoker m = e.Argument as MethodInvoker;
m.Invoke();
}
private void RestoreDatabase()
{
DataTool dt = new DataTool();
dt.ProgressChangeEvent += dt_ProgressChangeEvent;
dt.RestoreDatabase(Properties.Settings.Default.DevDBBackupPath,
WORKING_DATABASE);
}
|
| | 3 answer | Add comment |
Tuesday, 15 April 2008
|
| online questionnaire for recruiting developers Graeme Hood 18:27:45 |
| | Does anyone know of such a tool? Hopefully allowing for different
subjects and levels.
Or any other useful recruitment tips beyond the telephone converstaion?
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| | 1 answer | Add comment |
Monday, 14 April 2008
|
| migrating vs2003 to vs2005 website project after sp1 Jim Graf 17:41:50 |
| | Hi,
Before SP1 we were able to migrate a VS2003 website to a VS2005 Web
Site Project. Now it defaults to Web Application. How do I get it to
convert a vs2003 so0lution to a WebSite project
Any help would be appreciated
Thanks
Jim
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Monday, 7 April 2008
|
| Async File IO is not async? Alex Ivanoff 01:53:15 |
| | A very simple test program which writes out 512 MB:
using System;
using System.IO;
using System.Threading;
namespace AsyncIOTest
{
class Program
{
static void Main()
{
FileStream file = File.Create("out.test", 0x1000, FileOptions.Asynchronous);
ManualResetEvent evt = new ManualResetEvent(false);
Byte[] buffer = new Byte[512 * 1024 * 1024];
file.BeginWrite(buffer, 0, buffer.Length, Program.OnWriteComplete, evt);
evt.WaitOne();
}
static void OnWriteComplete(IAsyncResult ar)
{
ManualResetEvent evt = (ManualResetEvent)ar.AsyncState;
evt.Set();
}
}
}
On my machine BeginWrite takes about 12 sec followed by immediate call to OnWriteComplete. A quick examination with Reflector reveals that BeginWrite and BeginRead do not satisfy most (if not all) of the requirements of a "true" async IO outlined here: http://support.microsoft.com/kb/156932.
A bug?
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Thursday, 3 April 2008
|
| Bubbling events on a server side control Dean Cleaver 14:44:52 |
| | I've tried to create a control that can be either a TextBox or a
DropDownList, but am having trouble "bubbling" the SelectedIndexChanged
event for the DropDownList (within an UpdatePanel if that makes any
difference). My code is like this (snipped a bit for brevity) - is there
something obvious I am missing?
Dino
using System;
using System.ComponentModel;
using System.Data;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using AjaxControlToolkit;
namespace Client.Project.WebControls
{
[
DefaultEvent("SelectedIndexChanged"),
DefaultProperty("Text"),
ToolboxData("<{0} etailInputBox runat=\"server\">
</{0}etailInputBox>"),
]
public class DetailInputBox : WebControl, IPostBackEventHandler
{
protected override void OnInit(EventArgs e)
{
Controls.Clear();
Controls.Add(this.TextBox);
Controls.Add(this.DropDownList);
}
protected override void Render(HtmlTextWriter writer)
{
if (this.IsValid || this.ReadOnly)
writer.WriteLine("<div class=\"detailBlock\">");
else
writer.WriteLine("<div class=\"detailBlockError\">");
writer.WriteLine(" <div class=\"detailInput\">");
if (this.DropDownList.Items.Count > 0)
{
this.DropDownList.SelectedIndexChanged +=
DropDownList_SelectedIndexChanged;
this.DropDownList.RenderControl(writer);
}
else
this.TextBox.RenderControl(writer);
writer.WriteLine(" </div>");
writer.WriteLine(" <div class=\"clear\"></div>");
writer.WriteLine("</div>");
}
[Browsable(false),]
private TextBox textBox = null;
/// <summary>
/// Gets or sets the required text box validator.
/// </summary>
/// <value>The required text box validator.</value>
private TextBox TextBox
{
get
{
if (textBox == null)
{
textBox = new TextBox();
textBox.ID = this.ID + "Text";
}
return textBox;
}
}
[Browsable(false),]
private DropDownList dropDownList = null;
/// <summary>
/// Gets or sets the required text box validator.
/// </summary>
/// <value>The required text box validator.</value>
public DropDownList DropDownList
{
get
{
if (dropDownList == null)
{
dropDownList = new DropDownList();
dropDownList.ID = this.ID + "List";
}
return dropDownList;
}
}
private bool isValid = true;
[Browsable(false)]
public bool IsValid
{
get { return this.isValid; }
set { this.isValid = value; }
}
[
Description("The Details Fields ValidationGroup"),
Category("Custom Properties"),
]
public string ValidationGroup
{
get { return this.TextBox.ValidationGroup; }
set
{
this.TextBox.ValidationGroup = value;
this.DropDownList.ValidationGroup = value;
}
}
public ListItemCollection Items
{
get { return this.DropDownList.Items; }
}
public string SelectedValue
{
get { return this.DropDownList.SelectedValue; }
}
public int SelectedIndex
{
get { return this.DropDownList.SelectedIndex; }
set { this.DropDownList.SelectedIndex = value; }
}
void DropDownList_SelectedIndexChanged(object sender, EventArgs
e)
{
this.OnSelectedIndexChanged(e);
}
public event EventHandler SelectedIndexChanged;
protected virtual void OnSelectedIndexChanged(EventArgs args)
{
EventHandler thisEvent = this.SelectedIndexChanged;
if (thisEvent != null)
thisEvent(this, args);
}
public bool AutoPostBack
{
get { return this.DropDownList.AutoPostBack; }
set
{
this.TextBox.AutoPostBack = value;
this.DropDownList.AutoPostBack = value;
}
}
public void RaisePostBackEvent(string eventArgument)
{
this.OnSelectedIndexChanged(EventArgs.Empty);
}
}
}
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|
| Automatic Properties on 2.0 Brady Kelly 04:31:28 |
| | I thought these were merely syntactical sugar offered by the 3.5 compiler,
but would compile down to normal getters and setters that would work on the
2.0 framework. Yes, when I try and 'down-grade' a 3.5 project to 2.0, I get
compiler errors for automatic properties. Is this just something I have to
live with, or is there another way?
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Friday, 28 March 2008
|
| ListView and tooltips on a ColumnHeader Richard Kucia 23:32:16 |
| | Now this was a surprise. I wanted to show tooltips on the ColumnHeader of a ListView in details mode. Seemed like a simple enough task, but there doesn't seem to be a straightforward way to do this.
I found out that the MouseHover event fires for a ListView but not if the mouse is over a ColumnHeader. That really surprised me.
Similarly, the ToolTip object won't fire an event when the mouse is over a ColumnHeader.
A little googling shows that this has been a long-term problem. Some solutions that have been offered include handling the MouseMove event, but that seems like too much CPU time to burn -- even the solutions offered include that warning. And besides, if the above methods don't work, I would guess that MouseMove would also come up short, unless I'm watching MouseMove over the entire form (ugh).
Any ideas, anyone? Thanks.
Rick Kucia
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|
| Deployment with Merge Modules Richard Kucia 22:18:20 |
| | I can't figure out what I'm missing here --
VS2005: I have a solution with ordinary code projects and 3 deployment projects (English, German and Japanese). I need to include the same 30 data files with each of the deployment projects. So I built a MergeModule project and added all 30 data files to it. And then I added the MergeModule to each of the deployment projects. I set the deployment target for the merge module output to (application folder on the user's PC) \ "XYZ". It shows "XYZ" in the deployment project's merge module properties. The visual tree of the target PC's file system also shows the correct target for the MSM.
The subfolder XYZ is also designated in the deployment as one that should be created on the target PC. When I run the MSI, XYZ is indeed created under the application folder, as are a handful of other folders. But all 30 files go into the application folder, not the XYZ subfolder.
What did I miss? I've tried and can't find the right combination of ingredients. Thanks.
Rick Kucia
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Tuesday, 25 March 2008
|
| convert XDW to PDF Guest 07:34:41 |
| | I'm trying to convert a xdw file to a pdf file with vb.net.
i could convert jpeg or bmp files to a pdf file with iText,
but i can't find a way to convert xdw to pdf.
iText may not support xdw,i think.
Is it possible to make it? |
| | Add comment |
Thursday, 20 March 2008
|
| Another Late Night Question Reposted R. Rogers 16:44:46 |
| | Strange formatting issue. Hopefully this shows up better:
I'm getting tired so maybe I'm missing these.
I can't seem to find row and col position when editing in the VS 2008
editor.
I figured out how to turn line numbers on, but that's not what I want.
In the beta, VS2008 showed rol and col position down at the bottom right of
the code editor window.
I can't see it there anymore (installed the new VS2008 release), and there
doesn't appear to be any way to toggle it on, from Tools, Options, Text
Editor, C#
Also, I seem to remember that when I built (<Ctrl><Shift><B>), and the build
succeeded, VS showed a small piece of text on the bottom left "Build
succeeded". I may have changed an option within VS to get that.
Now when I build, and there are no errors, I get no message.
Sorry for the piddly little questions, but they're bothering me.
Thanks for any advice.
Richard Rogers
http://www.RichardRogers.ca/
(MSN) rogersrr_ca@hotmail.com
|
| | 5 answers | Add comment |
Tuesday, 18 March 2008
|
| Fault with AJAX UpdateProgress? Dean Cleaver 19:53:41 |
| | I'm using one of the UpdateProgress indicators on an UpdatePanel. I have
about 3 "options" to chose from, 1 which puts 0 items in a table, 1 that
puts 1 in the table, and 1 which puts 100's of items in the table.
When flicking between the first 2, everything performs as expected -
very quick updates, and no progress indicator as it happens in < 1 sec.
When I click on the third option, the progress indicator displays as
expected. However, when then I click on one of the first 2 options,
there is no progress indicator, but the update takes ages - I am
guessing that the client side script is busy cleaning out the 100's of
items, but not considering that to be part of the overall progress? And
when I say ages, it seems to be twice as long as loading the items in
the first place.
Surely the progress indicator should be triggered if it's taking the
AJAX client script a long time to "clean up"?
Dino
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|
| Web based report or form designer Mark Gregory 04:57:16 |
| | I would appreciate knowing if there is anything that will permit forms
(reports) to be created in a web page.
My client would like to be able to move controls around a page, then
save the layout. The form would then be used to enter data and print out
as a report.
The solution cannot have any win form components or requirements as this
has to be something that the user can do over the web.
Regards, Mark
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| | 3 answer | Add comment |
Monday, 17 March 2008
|
| General Strange Error on Data Bound ComboBox Brady Kelly 12:14:34 |
| | I have a combobox bound to a BindingSource, in turn bound to a DataTable of
Agent Names. Everything is handled by the VS 2008 designer, i.e. I have no
custom data binding code, nor do I have any code that sets anything on the
combobox. Yet, when I start my project, I get the following error. This
only occurs when 'Break when thrown' is set for Framework exceptions, but
surely this should only apply to my code? Is this maybe because I have the
ComboBox debug symbols loaded?
InvalidArgument=Value of '0' is not valid for 'SelectedIndex'.
Parameter name: SelectedIndex
|
| | 1 answer | Add comment |
|
