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Open your form as a DialogResult.
In order to do that, open it this way:
myChildForm.ShowDialog()
Hope that helps
Sincerely,
Elina
Life is great!!!
Enjoy every moment of it! 
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I want to add images to an imagelist while the program is running but I keep getting an out of memory exception.
My code looks like this:
foreach (string n in classfunctions.fxLoadXML())
{
this.imageList1.Images.Add(Bitmap.FromFile(n));
}
where fxLoadXML returns an array.
//Nick
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First things first, you might want to check and make sure that the file you are sending to Bitmap.FromFile is actually there and is a valid image format.
Also, how many images are we talking about? The imagelist probably has some sort of upper limit. Are the images all the same size, colordepth, format, etc.?
Also, you may want to check the documents on the imagelist. It may not require the Bitmap to hang around after being added to the imagelist - if so, you'll want to dispose it.
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Okay, thanks, the problem was a combination of I was trying to add an image format, which was not supported, and that I didn’t dispose the imagefile.
//Nick
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I wasn't sure which board to post this because it's not technically just C#, or just ASP.NET so I apologize in advance.
I have a connection string key to a SQL Server database. I made a copy of the database on my computer so I can test the edit function of nested datagrids (which I've read can be tricky).
I've never had to point to my own machine before and my key is giving me errors.
This is how I point to the actual real server:
<add key="ConnectionString" value="Data Source=SERVER-SQLSC1;Initial Catalog=Parts;User ID=aspuser;Password=crlamo5" />
This is what I tried for localhost:
<add key = "ConnectionString" value = "Data Source = localhost;Initial Catalog=PartsDB;"/>
I renamed the database PartsDB to avoid confusion. My computer's name is PROC-PC-11. I tried that instead of localhost and I still had an error when trying to retrieve data from the database.
Can someone point me in the right direction?
Many thanks as always!
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I have several instances of a UserControl on a Form. Each UserControl represents one of several possible audio channels.
This UserControl has a public property describing which audio channel the particular instance represents. The list of available audio channels is in an enum.
I've been able to implement "setting" this property and the corresponding updation of a label in the UserControl to reflect which channel that particular instance of the UserControl is currently representing.
The width of the control is constant. The width of the text is not. For example, Left, Right, Left Surr, Right Surr, etc.
How do I get the text centered with respect to the width of the control.
I tried lblChannel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter but that doesn't work. I suppose that only aligns text with respect to the label.
Do I need to calculate the location of the label for each channel selection?
Thanks!
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Well, if middlecenter works to calculate with respect to the label, make the label fill the user control horizontally. As long as AutoSize is turned off and you have the label anchored to the left and right, it should work.
Logifusion[^]
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Thanks for your reply!
Turning Autosize off results in the label's text being truncated. "Left Surround" shows up as "Left".
What am I doing wrong?
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You can either spread the label to the whole width of the usercontrol and then when it is TextAlign = center it will be automaticly centered.
Or you can use this: (this.Size.Width - lbl1.Size.Width - 10) / 2 -> this will be cenetered. (Set it as the location with the y position that you need.)
Hope I helped...
NaNg.
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Ah! Ok... I didn't think about spreading the label to cover the width of the control. (sorry, I'm new to this still!)
Thanks for your reply! It works now.
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table.clear()?
table = null?
table.remove?
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DataSet.Tables["TableName"].remove()
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Well if you have a bad design, you have to work around it. You should never have tables with the same name.
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Ok so you have an xml specification which has a value called ID. These are attributes of an http table not a dataset.table although they can be the same.
If you are talking about tables in a dataset they should match a good relational model. Each table has a different name, each row in the table should have a unique identifier. No different in this case with what you showed, although it looks like you don't have a unique id.
I am not totally familar with sending a dataset to an xml file, but it is supposed to keep all of the design (schema). It should work exactly the same in reverse.
Try this, create a dataset with a table from scratch, then save it off as a xml file, open the file in a regular editor and see what it wrote out there. Then modify your table above to match that schema. (If you can). Otherwise you will have to pull data out of each of the tables above and decide what datarows you want to delete.
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Ok so you know which appointments need to be deleted right?
Let's try to map a design out for this.
You have existing data and new data right?
You want to compare existing to new.
For outdated entries you want to delete the calendar entry?
This sounds like a bridge pattern. But I'd have to check that out.
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Is there a way to cancel\throw error when a user try to use = in my collection without using any methods?
eg.:
<br />
MyCollection myCol = new MyCollection();<br />
myCol.Add(new ObjectInstance());<br />
myCol[0] = new ObjectInstance();
Please help.
Thanks.
NaNg.
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Just make your indexer property get only with no set.
Logifusion[^]
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Thanks, forgot about that.
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I am using the invoke() to call a delegate in order to communicate with another form in a different thread. The code is below.
<br />
<br />
You can see at the bottom (before the stars) where the thread is started. The method below that is being called by the delegate in the code below the stars. Each set of code is in a diff thread.<br />
<br />
public class MainForm : System.Windows.Forms.Form<br />
{<br />
private void search()<br />
{<br />
<br />
Search ArtifactSearch = new ArtifactSearch(this);<br />
<br />
ArtifactSearch.SearchComplete += new Search.ProcessingCompleteDelegate(Search_ProcessingComplete);<br />
<br />
Thread StegSearch = new Thread(new ThreadStart(ArtifactSearch.Start));<br />
<br />
StegSearch.Start();<br />
}<br />
<br />
private void Search_ProcessingComplete()<br />
{<br />
}<br />
<br />
*********************************************************************************************<br />
<br />
public class Search<br />
{<br />
MainForm Parent;<br />
<br />
public event ProcessingCompleteDelegate SearchComplete;<br />
<br />
public Search(MainForm parent)<br />
{<br />
Parent = parent;<br />
}<br />
<br />
public void Start()<br />
{<br />
<br />
Parent.Invoke(SearchComplete,null);<br />
}<br />
}<br />
My problem is that when i invoke the SearchComplete delegate it tells me that "SearchComplete" is not set to an instance of an object. But as you can see it clearly is set to a new instance before the thread is started. How do I fix this. I have used delegates in this manner in other areas of my code and it worked. I'm stumped.
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Not that I'm a threading expert or anything, but I've run into a similar problem before. Is there any place in your code where you are releasing the event? I'm thinking that maybe you should put a lock statement in there somewhere - it seems likely that you are removing the handler for the event before you actually call it (possibly on another thread).
Also, I'm not sure if this is an issue or not, but can you try moving the declaration for the ArtifactSearch object up to the class level. I'm wondering if there might be a scoping issue here that we aren't seeing.
Will
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I'm not familiar with lock statements or releasing events. How do you use the lock statement?
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Actually, after looking it over in light of my other comments, I'm not sure it's needed. Just raise the event and catch it on your form. Then, if InvokeRequired is true, you'll need to call Invoke. I would do this from the form instead of your class, as doing otherwise entangles the two objects. You could have the following, for instance:
public void Search_ProcessingComplete()
{
if(this.InvokeRequired)
{
this.Invoke(Search_ProcessingComplete);
}
else
{
//Do your stuff here that hits the UI.
}
}
On your Search object, your Search method would look like:
public void Start()
{
/// Search would take place here
if(SearchComplete != null) SearchComplete(?);
}
where "?" is the set of parameters you need to pass to invoke the delegate.
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this.Invoke(**delegate required here**, args) , what you have is a method
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