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That's I'm looking for!
but what do you mean with controls Parent form?
The Statusbar is in my Main window class frmMain.
So I think I have to do something like
frmMain form = Parent as frmMain;
but then 'Parent' is unknown.
Ariadne
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Parent is a property inheritted from Control. Any class that derives from Control inherits the Parent property, but this could be your frmMain (which, BTW, is a terrible name for a class - see Naming Guidelnes[^] in the .NET Framework SDK*), a Panel, or any container. The as keyword in C# basically performs an exception-handled cast so that it just returns null instead of throwing an InvalidCastException.
* Keeping with naming conventions within a framework or API (be it .NET, Java, MFC, etc.) is important. It fosters better development within that framework or API, among other things.
Microsoft MVP, Visual C#
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I think, i have a tiny annotation to Heaths posting.
Use a public or internal (or protected internal) Property to make your Statusbar field accessible. This allows further restriction of accessibility, for example you could make it read only.
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Ariadne wrote:
Is there a way to access the Statusbar (defined in the main window frmMain) from a Class (SubClass) which is called from frmMain?
Hi,
I would not access the status bar object that is defined in the main window from a design perspective. Your sub-class should not really know about the status bar in the parent window. Such kind of dependency is almost always a very bad idea.
If you need to update the status bar from your control, maybe a better idey would be to use windows events.
Pankaj
Without struggle, there is no progress
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How do I fire a windows event from my child-class?
Andreas
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hai there,
in my application I have two three forms. Each and every form consist of more than one groupbox with four to five combo box. I am populating some record in combobox from some database(Sybase). each and every combo box in a all forms shows required records from the database.
After all compilation I will create a setup for my project. If I install this setup in any machine including my machine (where I developed my this application) my all combobox won't show any pulled data from database.
Any idea ?
Why this ? please help me .
Sreejith S S Nair
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More than likely, it's not pulling data from the database. You should always place your connection string in the .config file so it can be easily changed. Also make sure that you're not handling any exceptions and simply ignoring them. Changes are an exception is being thrown because the connection string is wrong, doesn't exist, or your credentials are wrong when you deploy.
While this wouldn't be a problem on your machine, make sure that the OLE DB provider for Sybase is installed on the target machines. It should be, but double check. If not, you'll have to install MDAC 2.6 or higher (2.8 is the current) which includes a lot of OLE DB providers and, IIRC, Sybase is one of them.
Other than that, it's hard to say what's wrong. You should step through your code and see if any exceptions occur or if you have proper error handling (like conditionals checking for null references) that objects are null.
Microsoft MVP, Visual C#
My Articles
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i am using .config file to store connection string. And upto my level best i am catching all exception including super class(Exception class).
it won't be a problem on my machine provided on development stage. that is i can view all required data from database on development stage. After completing development if i install the created setup on the same machine it won't show any data.
if this is because MDAC i am using mdac 2.8(as you told).
i can easily setp through but the main problem is it is not showing any exception after catch all possible exception apart from super class(Exception ex).
Sreejith S S Nair
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If you're catching all exceptions by catching Exception (the "base", not "super" class - though the concepts are the same, in .NET it's referred to as "base"), then make sure you actually do something with it, like display a MessageBox or something else. Otherwise, if you just catch it and do nothing, you'll never know if an error occured.
Microsoft MVP, Visual C#
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catch(Exception ex)
{
MessageBox.Show("Error info :"+ex.message.toString(),"Error Message",MessageBoxButton.Ok,MessageBoxIcon.Error);
}
I am catching all exceptions professionally. the above is a small eg: to know you how i am getting information out out.
I nevar feel this much mental tension in my life. why because one product is still in shelf because of this problem.
Sreejith S S Nair
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Actually, that's not professionally. Professional exception handling typically entails sending exception informatio to a dispatch block of sorts that is configurable and can display message boxes, raise WMI events, and much more. For example, see the Exception Management Application Block for .NET[^], part of the Microsoft Patterns and Practices initiative.
In any case, then next thing to do - as I mentioned earlier - is to step through your code in the try block and see if there isn't some other error. Without seeing your code (not just the data layer code, but also the binding code), it's impossible to tell. You need to debug your code by stepping through it and finding the error. Debugging is just part of development.
It's possible that an exception is not getting thrown but you have some conditionals that are not satisfied. Take this simple example:
SqlConnection conn = null;
SqlCommand cmd = new SqlCommdand("SELECT * FROM MyTable");
try
{
if (conn != null)
{
}
}
catch (Exception ex)
{
}This is very simple, but should describe what I'm talking about. Also, make sure that you're deploying the .config file with the application, using the same name as the app and in the same directory.
Microsoft MVP, Visual C#
My Articles
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now i got a little idea.
i already told you that all my combo box are grouped inside groupbox(actually this is for group disposal or clearing).
Now i excluded all group box.Insted of that i placed panel controls.
now i can view the data.
but the groupbox problem in still in my mind even though i got solution.
thnaks for your continous talk.
Sreejith S S Nair
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There's no reason the GroupBox would interfere like that. I've done it many times with absolutely no problems. The GroupBox is a container control similar to the Panel. Something in your code just isn't right, but without seeing it I really can't say.
Microsoft MVP, Visual C#
My Articles
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good morning
do you want my source file to check
Sreejith S S Nair
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Sorry, but no. I'm very busy and don't have time to go over source code, especially when the exact nature of the problem isn't known. I recommend you debug your application and step through the code to find out what's happening. Go through line by line and check the state of relevent objects as you go. Debugging is all part of the fun. 
Microsoft MVP, Visual C#
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Hello,
i'm sorting my Xml-file with xsl. Works fine but when i want to sort my column descending, he doesn't do it. It's exactly the same as ascending. What am i doing wrong then?
XslTransform xslt = new XslTransform();
xslt.Load(xslFile, null,null);
xslt.Transform(filePath,filePath,null);
dsT.Clear();
dsT.ReadXml(filePath);
My xsl file looks like this
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()">
<xsl:sort data-type="text" select="name" order = "descending" />
</xsl:apply-templates>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
My xml file looks like this
<?xml version="1.0" encoding="utf-8"?>
<packageconfig version="1.0">
<tables>
<table name="TransMst">
<description />
<tablegroup>programs</tablegroup>
</table>
<table name="UserCmp">
<description />
<tablegroup>settings</tablegroup>
</table>
<table name="UserPrf">
<description />
<tablegroup>settings</tablegroup>
</table>
</tables>
</packageconfig>
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Get rid of the spaces after the order attribute and the = sign.
Also, why are you going to these lengths to sort data? Simple create a DataView on your DataTable and call Sort. Use that DataView for data binding then. It works in place of a DataTable. If you use DataGridTableStyles, you still use the table name for the DataGridTableStyle.MappingName property.
Microsoft MVP, Visual C#
My Articles
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the spaces are not the problem because i'm doing the exact same thing a second datagrid. I have made a private to sort the xml with a parameter (ascending or descending). In the first datagrid he sorts descending and when i do the same thing in the second datagrid he doesn't do it and sorts ascending instead.
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Have you actually stepped through your code to make sure that the DataTable contains the sorted data? A DataGrid can apply a default sort based on the DataTable's DefaultView. This why you're supposed to use a DataView on your DataTable and bind against that like so:
DataView view = new DataView(dataTable1);
view.Sort = "MyColumn DESC";
dataGrid1.DataSource = view; See the DataView.Sort property documentation in the .NET Framework SDK for more information.
Microsoft MVP, Visual C#
My Articles
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ok thx!
is it also possible that he wont sort it because i'm sorting my xml on an attribute?
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If you're sorting against an attribute, you should use "@name", not just "name". I didn't catch that before. Still, a DataView is the best way and most efficient way to go. Why go to all the trouble of using an XSL Transform just to sort data and have to read it back in?
Microsoft MVP, Visual C#
My Articles
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yesss thx! the @ was the problem.
I know that a dataview is easier but last time i had problems with it so i wrote a Xslt-file. Now i can re-use that code so it's just copy paste now, except the problem with the @ 
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Hi,
I have a treeView Control. I am adding a node with text . The text is very large one. It is giveing scroll bar for the tree view but all the text is not visible (the text is very large around 1000characters). How can I change the properties to make the entire text visible.
Karteek
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 Why on earth would you put a string that long in a TreeView? That is more like detail that should be displayed on some other control. I'm just saying this because if I saw an application do something like that, the first thought in my head would be "WHAT WERE THE DEV's THINKING WHEN THEY DID THIS?!?!"
Now, the TreeView control doesn't support putting huge strings on multiple lines in a single node. You COULD break up that string into multiple nodes under the same parent node. Or you could attempt to ownerdraw the TreeView, but that's not exactly easy. Another option would be to check out an alternate TreeView control from, say, Infragistics...
RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi,
I usually don't have such long strings in my control but in some case I amy get such strings. So I want this.
Karteek.
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