C# Discussion Boards - CodeProject

9-May-05 4:31

If the field doesn't support NULL and it can be blank, then your only option is to check the length of the data in the field. Images are usually going to be more than 0 bytes long.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

How to Rotate Controls?

RajeshGuptha9-May-05 3:37

RajeshGuptha

9-May-05 3:37

Hi,
I want to rotate a control, take for example a button Control or a label control to some angle. But i dont know how to attain that..
i tried setting the region of the control with a graphics path whose transform set to rotate about its center...but im not able to get the output...
Can anybody help me?

Thanks,
Rajesh

Dave Kreskowiak9-May-05 4:30

9-May-05 4:30

Off the top of my head, you'll have to create your own version of the controls you want to visually rotate and supply the functionality for it.

There may be another way to do it by dropping the controls in some other container and rotating the container somehow, but i really can't see that happening.

Another option is a 3rd party Windows Forms Control library.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

therealmccoy9-May-05 9:30

therealmccoy

9-May-05 9:30

Right off the very tip top of my head....

Could you just decrement the X size/location and increment the Y size/location in a for loop (or do loop)? The text wouldn't rotate, but the control would appear too.

Just a thought.

Of course you have to mark your start position and reverse at 90 degrees, etc, etc...

www.lovethosetrains.com

Dave Kreskowiak9-May-05 11:31

9-May-05 11:31

No, it wouldn't. It would just make the button appear tall and narrow, not rotated to any angle. Re-read the original post...

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

RajeshGuptha10-May-05 2:46

RajeshGuptha

10-May-05 2:46

Actually i tried transforming the region of the control to a rotation...
for example,
Region reg = new Region();
Matrix matObj = new Matrix();
matObj.RotateAt(/*some angle*/, /*with respect to some point*/);
reg.Transform(matobj);
myControl.Region = reg;

Iam able to attain the rotation...but supposing the region (reg in this example)is in another shape(than rectangle)...say ellipse, then the shape of the ellipse is not visible completely....reason is that the rectangle coordinates(i.e. the original rectangle size) used to draw the ellipse is smaller than the rotated structure...(after rotation, the location of points are actually out of the bounds of the controls client rectangle...)
So i tried to get the size of the outer rectangle which has completely both the original and the rotated rectangles... by some trignometry...
but nope, im not getting the exact coordinates...
can you help me in this??
I

Thanks and Regards,
Rajesh

Retain values

esjq9-May-05 3:13

esjq

9-May-05 3:13

Hi!

What is the best way to retain a value between sessions. For example, if you have a login dialog and the user account name is likely to be the same the next time the application starts, what is the preferred way to fill the textbox with user account name from the previous time?

Thank you Smile | :)

Re: Retain values

Dave Kreskowiak9-May-05 4:27

How do I expose a Windows Service procedures and functions so that i can call remotely??

9-May-05 4:27

You can either store it in the Registry, probably under the CurrentUser key, or in a file somewhere.

But, keep in mind, this is considered a mild security risk. You might also want to include an option to turn this feature on/off.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Open Files

eng.mohamed9-May-05 2:14

eng.mohamed

9-May-05 2:14

I want the button handeller "btnOpen_Click" to open a spacefic folder has this path (D:\MyFolder) what can i do ?
thanks in advance . Confused | :confused:

misho

Re: Open Files

mav.northwind9-May-05 3:02

mav.northwind

9-May-05 3:02

You can browse the documentation for OpenFileDialog[^] and use the InitialDirectory property.

mav

C# Discussion Board

Illegal Operation9-May-05 1:24

Illegal Operation

9-May-05 1:24

Hi,

Can someone please tell me where I can find a Step-by-Step guide to building a Forum Discussion Board?

Thanks!

Illegal Operation

WannaBe and GonnaBe Systems Developer

Re: C# Discussion Board

MoustafaS9-May-05 4:46

MoustafaS

9-May-05 4:46

http://www.codeproject.com/asp/codeproject-forum.asp[^]
This is a description of the CP forums ,and also microsoft has released a free code for its community in a web site named Roll eyes | :rolleyes:

communityserver but i really don't remember the URL Roll eyes | :rolleyes:

if you googled it you will of course find it,and its in C# .

AfzalHassen9-May-05 1:24

AfzalHassen

9-May-05 1:24

Hi,

i'm trying to develop a C# windows service that needs to expose procedures and functions that will be called remotely via an application that is going to be developed in delphi 6.

i'm totally new to distributed applications, so if anyone can give me some guidance as to how i can accomplish this, i will be VERY greatfull.

Thanks a million!

Afzal Hassen

How to Create a C# Application to uninstall Applications

pubududilena9-May-05 0:17

pubududilena

9-May-05 0:17

hi all,
I want to write a C# Application to Uninstall Applications(Exes)?
Can any one guide me?

thanks in advance..

Re: How to Create a C# Application to uninstall Applications

Colin Angus Mackay9-May-05 1:33

Colin Angus Mackay

9-May-05 1:33

Visual Studio already provides a number of setup and deployment projects which will uninstall the software via the Add/Remove programs control panel applet.

My: Blog | Photos | Next SQL Presentation
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Re: How to Create a C# Application to uninstall Applications

pubududilena9-May-05 17:18

pubududilena

9-May-05 17:18

hi,
Yes..it is in the "add/Remove programs" in the Control Panel.But I want to uninstall it from Start-->Programs--->ABC-->uninstall ABC
Menues..
How do we get Uninstall Program for above Menue.?

Thanks in advance..

Re: How to Create a C# Application to uninstall Applications

mav.northwind10-May-05 0:02

mav.northwind

10-May-05 0:02

Hi!
You could simply call msiexec to uninstall your application:
msiexec /uninstall MySetup.msi

There are commandline parameters to make it a silent (un)install and several others.
You can find the documentation here: MSIEXEC docu on MSDN[^]

Regards,
mav

Binding Dataset to DataGridView

Mikan238-May-05 22:29

Mikan23

8-May-05 22:29

I am attemping to bind the data from an xml file into a datagridview. I have achieved this via the following code:

<br />
quotesDataSet.ReadXml(Properties.Settings.Default.XmlQuoteFile);<br />
<br />
quoteGrid.DataSource = quotesDataSet;<br />
quoteGrid.DataMember = "quote";<br />

This automatically binds the four elements of the quote parent into four rows. However, from that point on, I cannot rename the header rows or control them in any way. I've tried everything from attempting to assign a datagridtablestyle, to simply using quoteGrid.Columns[1].HeaderText = "Text"; Can anyone provide me with a working example of how to achieve this?

rudy.net9-May-05 18:36

rudy.net

9-May-05 18:36

I think it makes sense that you can not change the header because you are directly linking the xml file to the datagrid. To change the header you need to create custom columns using DataGridTextBoxColumn classes (example follows). Another option you might have is to read the xml into a dataset and modify the table with your data so it has a different column name.

Example for custom table:
Instead of setting Datasource, use the following:

<br />
this.dataGrid1.SetDataBinding(myDataSet, "MyTable");<br />
CreateCustomTable();<br />
</code<br />
<br />
<code><br />
private void CreateCustomTable()<br />
{<br />
	DataGridTableStyle ts1 = new DataGridTableStyle();<br />
	ts1.MappingName = "Department";	<br />
	// Set other properties.<br />
	ts1.AlternatingBackColor = Color.LightGray;<br />
<br />
	// Add column<br />
	DataGridColumnStyle TextCol = new DataGridTextBoxColumn();<br />
	TextCol.MappingName = "Name";<br />
	TextCol.HeaderText = "Department Name";<br />
	TextCol.Width = this.dataGrid1.Size.Width-60;<br />
	ts1.GridColumnStyles.Add(TextCol);<br />
        //add more columns as needed and map directly to any column of your table.<br />
<br />
        //lastly, add the tableStyle<br />
	this.dataGrid1.TableStyles.Add(ts1);<br />
}<br />
<br />

Mikan239-May-05 20:51

Mikan23

9-May-05 20:51

I'm working with the new Visual C# Express beta and the latest of the .Net 2 version. Unfortunately, they have replaced datagrid with datagridview, and datagridtablestyle does not seem to have a new version. Unfortunately, they also have not provided any documentation that I can understand for achieving the same effects. Any other thoughts?

Thanks for the help either way.

rudy.net10-May-05 3:06

rudy.net

10-May-05 3:06

In that case instead of quoteGrid.Columns[1].HeaderText
try yourDataGridView.Columns[1].Name="your column name".
I hope that helps, I really haven't tried the new version yet.