Re: serialization problem - C# Discussion Boards

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Re: Login

pat2708817-Oct-04 7:43

pat270881

7-Oct-04 7:43

Unfortunately i did not find a good sample so i develop a login-screen on my own. The course of the events in my developed application is the following: When the the user logs in a new form is showed where some user specific information is displayed. The problem is how can i know in the new form which user with wich userid was logged in?? - Is this possible with taken over a parameter from the login-screen to the other form? if yes how does it work in mobile applications?

Regards

patrick

setting datagrid cursors

ddelapasse6-Oct-04 4:01

ddelapasse

6-Oct-04 4:01

Hi,

The ONLY way I can find to change a bound datagrid's cursor look successfully is to subclass DataGrid and inside the OnMouseMove force the cursor. However, because of some black magic we are using to force row heights on a particular grid I am NOT allowed to subclass it.

Are there any other ways I can force the cursor? Our requirements insist on a 'hand' cursor for all our grids containing selectable items.

thanks,
Deanna

.NET OLAP control?

jvbragt6-Oct-04 2:29

jvbragt

6-Oct-04 2:29

I am looking for an OLAP control. So far i found two ActiveX controls:
- DynamiCube
- ContourCube

I like the functionality of both controls, but the controls do not support the XP visual styles. Also i prefer a .NET component above the ActiveX controls.

Is such an OLAP control available?

Re: .NET OLAP control?

Christian Wikander6-Oct-04 3:36

Christian Wikander

6-Oct-04 3:36

Search OLAP in .NET section of www.componentsource.com. You will get two hits.

Re: .NET OLAP control?

jvbragt6-Oct-04 3:59

jvbragt

6-Oct-04 3:59

That's correct. Only these two are OLAP charts. What i need is an OLAP table with multiple dimensions on both the x and y axis.

serialization problem

ongo6-Oct-04 1:53

ongo

6-Oct-04 1:53

Hi I have simple class

[Serializable]<br />
	public class Siren	: IDataSourceItem<br />
	{<br />
		uint		        _id;<br />
		string			_Name;<br />
		int			_InventoryNumber;<br />
		string			_SirenType;<br />
		string			_LocationStreet;<br />
		string			_LocationNumber;<br />
		string			_Remark;<br />
		DateTime		_LastDiagnostic;<br />
		DateTime		_NextDiagnostics;<br />
        .<br />
        .<br />
        .<br />
        .<br />
        .<br />
        .<br />
        }

and I have collection of classes of this type

[Serializable]<br />
	public class SirenGroup :  System.Collections.CollectionBase,IDataSourceItem<br />
	{<br />
		public SirenGroup(){}<br />
<br />
		public int Add(Siren siren)<br />
		{<br />
			return this.InnerList.Add(siren);<br />
		}<br />
<br />
		public void Insert(int index,Siren siren)<br />
		{<br />
			InnerList.Insert(index,siren);<br />
		}<br />
<br />
		public void Remove(Siren siren)<br />
		{<br />
			InnerList.Remove(siren);<br />
		}<br />
<br />
		public new void RemoveAt(int index)<br />
		{<br />
			InnerList.RemoveAt(index);<br />
		}<br />
         .<br />
         .<br />
         .<br />
         }

when I serialize this object evrything seems OK

BinaryFormatter binaryFormatter = new BinaryFormatter();<br />
   System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(100);<br />
   <br />
			   <br />
   try<br />
   {<br />
	binaryFormatter.Serialize(memoryStream,sirenGroup);<br />
   }<br />
   catch (System.IO.IOException exc)<br />
   {<br />
	Utilities.WriteLog.WriteError(exc);<br />
   }

when I deserialize it

try<br />
{<br />
   System.Type typeObjectType = typeof(Definitions.SirenGroup) ;<br />
  if(typeObjectType.IsSerializable)<br />
  object sirenGroup = <br />
            System.Convert.ChangeType(binaryFormatter.Deserialize(memoryStream),typeObjectType);<br />
}<br />
catch (System.Runtime.Serialization.SerializationException exc)<br />
{<br />
	Utilities.WriteLog.WriteError(exc);<br />
}

I get an error : stream ended before analysis was finished
Could anybody please tell me wat can produce this error.
Thank You

Salut!

Re: serialization problem

J4amieC6-Oct-04 2:26

J4amieC

6-Oct-04 2:26

If you're doing that all in one go you're going to have to set the MemoryStream's "Position" property back to zero before trying to deserialize.

Also, the use of ChangeType is not necessary as you should be able to cast it directly like so:

Definitions.Sirengroup sirenGroup = (Definitions.SirenGroup)binaryFormatter.Deserialize(memoryStream);

Re: serialization problem

ongo6-Oct-04 2:42

ongo

6-Oct-04 2:42

thank you very much. It was exactly the problem.

Salut!

Convert base64String to byte[] in CrystalReport

Pain_Elemental6-Oct-04 1:41

Pain_Elemental

6-Oct-04 1:41

Hi all,
I'm currently trying to use an xml-file as datasource for CrystalReports.

Works fine so far, but unfortunately Crystalreports displays the image, which is in the xml-file as base64String, as string.

Is there something like the Convert.FromBase64String() method in Crystalreports, so that my image is actually shown as an image?

Best Regards
Bernd

-------------------------------------------
The light at the end of the tunnel has been switched off temporarily due to budget problems...

Re: Convert base64String to byte[] in CrystalReport

Alex Korchemniy6-Oct-04 7:56

Alex Korchemniy

6-Oct-04 7:56

I haven't done any convertions in Crystal Reports but I would recomend using an ADO.NET as a data source. You can load a dataset from your XML file and pass it into the report

GUI from Windows Service

Jo Develper6-Oct-04 1:22

Jo Develper

6-Oct-04 1:22

Hi,

Does any one know to pop up a GUI from a windows service? The windows service I am developing uses process to execute exes(another applications). Some of those exes may have user interface. Since the exe's are being executed from a windows service, the user interface of that is not displaying.

Thanks,
Jo.

Re: GUI from Windows Service

Stefan Troschuetz6-Oct-04 1:30

Stefan Troschuetz

6-Oct-04 1:30

If you look at the service in the control panel you should find an option that allows the service to interact with the desktop. It should be under the logon tab.

www.troschuetz.de

Using C# dll in vb6

Zapss6-Oct-04 0:27

Zapss

6-Oct-04 0:27

Hello

Re: Using C# dll in vb6

Stefan Troschuetz6-Oct-04 1:10

Stefan Troschuetz

6-Oct-04 1:10

Do you have a specific question or just wanted to say hello Confused | :confused:

www.troschuetz.de

Re: Using C# dll in vb6

Steve Maier6-Oct-04 6:44

Steve Maier

6-Oct-04 6:44

One method of using C# class or a C# dll is to wrap the C# code as a COM object that you can then use in another language. Here is a link to an article on that.

http://codeproject.com/csharp/COM_Object_in_C_.asp[^]

Steve Maier, MCSD MCAD

Height of Font

sachinkalse5-Oct-04 22:32

sachinkalse

5-Oct-04 22:32

Font.GetHeight Method and Font.Height Property are being described in almost identical words in MSDN.
If I test both the font size = 11
The GetHeight return 14.66667 and
Height Property returns 15Font.
What is the difference between two values?
please guide

Re: Height of Font

Christian Wikander5-Oct-04 22:45

Christian Wikander

5-Oct-04 22:45

The difference is described in the documentation for Font.Height in MSDN.

GetHeight is returning a float and Height is an int. GetHeight is returning the exact height and Height is GetHeight rounded upwards.

Re: Height of Font

sachinkalse6-Oct-04 0:17

sachinkalse

6-Oct-04 0:17

thanks for the reply, but i actually had deleted this question when i realised the difference, i don't know how come it still remains there in the forum.
regards

MDI Child form starts off without titlebar widgets

benjymous5-Oct-04 22:26

benjymous

5-Oct-04 22:26

I've noticed a strange bug in my application (C#.Net using the express 2005 beta)

I've currently got it set to open new child windows maximized, and I get the normal child minimize/restore/close/etc buttons appear on the parent's menu bar

However, if I restore the child window, it's a bit hit or miss as to whether the child window gets widgets in its title bar

See screenshot[^] - the King Tut image window doesn't have widgets, but the other two windows do.

I've found that sometimes resizing the child window a bit makes the widgets suddenly appear.

What am I doing wrong? (or is this a Whidbey bug?)

--
Help me! I'm turning into a grapefruit!
Phoenix Paint - back from DPaint's ashes!

Make a component appear on the form at design time

Christian Wikander5-Oct-04 22:18

Christian Wikander

5-Oct-04 22:18

I'm trying to make a component who's function can best be described as similar to the MainMenu component in VS.NET. The component should be able to add controls to the parent form at design time.
Via code in the component, I can create the new control and add it to the same container as the component, thus making it visible in the properties window of the form (via the combobox in the properties window), but I can't seem to figure out how to make the control visible on the form. How can this be done?

Re: Make a component appear on the form at design time

Hadi Fakhreddine6-Oct-04 0:06

Hadi Fakhreddine

6-Oct-04 0:06

If your component is a UserControl then you should have no problem seeing it on the form when you drop it from the toolbox. It acts as any other .NET built-in component.
The component should be in a seperate project and should be a UserControl type.

Re: Make a component appear on the form at design time

Christian Wikander6-Oct-04 0:36

Christian Wikander

6-Oct-04 0:36

The UserControl does not look the same as the MainMenu. As for the MainMenu the main component is the one that sits in the yellow field below the actual form. From that, several controls on the form are created, one for every MenuItem.

I want to make a component (inherit from System.ComponentModel.Component) and by using code in the component I want to create several controls on the actual form at design time. Just like the MainMenu or the toolbar of VS 2005. The reason for this is that I want to manage several controls from one location, the component.

how to handle a mass of lables in C#?

momer5-Oct-04 22:17

momer

5-Oct-04 22:17

The problem is: I want to use a for control sentence to control 16 lables,each time I want to change one lable's Text property.Suppose the 16 lables are lable1,lable2,lable3,...,lable16. What does the code should look like?

Re: how to handle a mass of lables in C#?

MoustafaS5-Oct-04 22:49

MoustafaS

5-Oct-04 22:49

hi momor
that will be for (i=1;i<=16;i++)
{
myLabel.Text = "Label" + i + "/n";
}
that would help

Re: how to handle a mass of lables in C#?

momer6-Oct-04 17:00

momer

6-Oct-04 17:00

Hi!Moustafa_,

Thank you very much!
But what I need is not to change one lable's Text property
for 16 times,but to change 16 lable's Text properties.I want to realize it with a for loop,and change one lable's Text property in each loop.In this case,what should my code look like?
Thank you again!

Last Visit: 31-Dec-99 18:00 Last Update: 1-Jun-24 4:43

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