help to covert this to generic code... [modified] - C# Discussion Boards

Re: Reflection and Generics (List)

Giorgi Dalakishvili15-Sep-07 4:03

Giorgi Dalakishvili

15-Sep-07 4:03

You can do it like this:

<br />
Assembly asm = Assembly.LoadFile(@"C:\MyDll.dll");<br />
Type myType = asm.GetType("WindowsApplication4.Class1");<br />
<br />
Type ListType = typeof(List<>);<br />
Type ListOfMyType = ListType.MakeGenericType(myType);<br />

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Re: Reflection and Generics (List)

Vertyg015-Sep-07 4:23

Vertyg0

15-Sep-07 4:23

Thanks Giorgi,
only one question remains how to add objects to ListOfMyType? Thanks alot!

Re: Reflection and Generics (List)

Giorgi Dalakishvili15-Sep-07 4:34

Giorgi Dalakishvili

15-Sep-07 4:34

First you will need to create instance of ListOfMyType. You can do it like this:

<br />
object myObject = Activator.CreateInstance(ListOfMyType);<br />

Then use InvokeMember method of Type class to invoke any method of ListOfMyType class. Here is an example from MSDN: Type.InvokeMember Method[^]

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Re: Reflection and Generics (List)

Vertyg015-Sep-07 4:44

Vertyg0

15-Sep-07 4:44

I think that you can`t invoke Add member
Code:

<br />
myObject.GetType().InvokeMember("Add", BindingFlags.Public | BindingFlags.InvokeMethod, null, myObject, new object[] { myType1 } );<br />

Error:

<br />
Method 'System.Collections.Generic.List`1[[MojDll.Class1, MojDll, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].Add' not found.<br />

Re: Reflection and Generics (List)

Giorgi Dalakishvili15-Sep-07 5:02

Giorgi Dalakishvili

15-Sep-07 5:02

I think it should look like this:

<br />
ListOfMyType.InvokeMember("Add", BindingFlags.Public | BindingFlags.InvokeMethod, null, myObject, new object[] { myType1 } );<br />

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Re: Reflection and Generics (List)

Vertyg015-Sep-07 4:59

Vertyg0

15-Sep-07 4:59

Ah didn`t created instance of class .... everything works now thanks !

Re: Reflection and Generics (List)

Giorgi Dalakishvili15-Sep-07 5:03

Giorgi Dalakishvili

15-Sep-07 5:03

You are welcome Smile | :)

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help to covert this to generic code... [modified]

arbrsoft15-Sep-07 1:55

arbrsoft

15-Sep-07 1:55

//code is like this...

[XmlRoot("AutoupData")]
public class AutoupData
{
private ArrayList VersionArray;

public AutoupData()
{
VersionArray = new ArrayList();
}

[System.Xml.Serialization.XmlElement("versionInfo")]
public VersionC[] VersionInfos
{
get
{
VersionC[] VersionInfos = new VersionC[VersionArray.Count];
VersionArray.CopyTo(VersionInfos);
return VersionInfos;
}
set
{
if (value == null) return;
VersionC[] VersionInfos = (VersionC[])value;
VersionArray.Clear();
foreach (VersionC Versioninfo in VersionInfos)
VersionArray.Add(Versioninfo);
}
}
public int AddItem(VersionC VersionInfo)
{
return VersionArray.Add(VersionInfo);
}
}

public class VersionC
{
[XmlAttribute("version")]
public float version;
public VersionC()
{
}

public VersionC(float Version)
{
version = Version;
}
}

//code end...

is this using boxing and unboxing?
if it does then how can I convert this code to generic one?
I'm trying hard but the concept is so difficult to me.
please help me.
thanks.

Re: help to covert this to generic code...

Colin Angus Mackay15-Sep-07 2:05

Colin Angus Mackay

15-Sep-07 2:05

arbrsoft wrote:
is this using boxing and unboxing?

No. VersionC is a class. Only structs cause boxing and unboxing.

arbrsoft wrote:
if it does then how can I convert this code to generic one?

If you are using .NET 2.0 you should look at the Collection classes and then return a ReadOnlyCollection rather than copy arrays around. It might improve your design.

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Question on streaming media file?

Khoramdin15-Sep-07 1:45

Khoramdin

15-Sep-07 1:45

Hello everyone,

Can someone tell me little about streaming Media Files (Movie) over network using .Net Frame work?

I would like to make am Windows Application with can be used to receive and play movie files in the user application. Right now I am reading about DirectShow but I cannot find anything on sending and receiving media files (Audio/Video) over Network.

Any help to put me in the right direction will be great. Thank you very much and have a great day.

Khoramdin

ole type field in database table pic to show in the c#

Sonia Gupta15-Sep-07 0:58

Sonia Gupta

15-Sep-07 0:58

there is an ole field in the database , now i want that pic to show in the c# form.
How can i do it?

Soniagupta1@yahoo.co.in

Re: ole type field in database table pic to show in the c#

sulabh202015-Sep-07 1:40

sulabh2020

15-Sep-07 1:40

do u want to show pic in the windows imahe control of windows form.

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Re: ole type field in database table pic to show in the c#

Sonia Gupta15-Sep-07 1:44

Sonia Gupta

15-Sep-07 1:44

yes sir

Soniagupta1@yahoo.co.in

Re: ole type field in database table pic to show in the c#

sulabh202015-Sep-07 1:48

sulabh2020

15-Sep-07 1:48

What strikes in my mind about ur problem is that u try to save path of image u want to display and than using pic control in windows u can dynamically set the property of path of control to image from database.

reply me if found any confussion or i am understanding mistaken.

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Re: ole type field in database table pic to show in the c#

Sonia Gupta15-Sep-07 2:06

Sonia Gupta

15-Sep-07 2:06

sir i am not storing the image path in the database , there exist an ole type column there i am saving the image.

Soniagupta1@yahoo.co.in

Re: ole type field in database table pic to show in the c#

sulabh202015-Sep-07 2:12

sulabh2020

15-Sep-07 2:12

may i know what exact the functionality is there are many possible ways to resolve the same.

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Always be in touch to help about the topic ASP.NET

Re: ole type field in database table pic to show in the c#

Sonia Gupta15-Sep-07 2:18

Sonia Gupta

15-Sep-07 2:18

sir, all i want to do is to show the pic in the image control (the pic which is stored in the database in the ole type).

Soniagupta1@yahoo.co.in

Re: ole type field in database table pic to show in the c#

sulabh202015-Sep-07 2:23

sulabh2020

15-Sep-07 2:23

are u able to retrive image from data base in correct format.

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Re: ole type field in database table pic to show in the c#

Sonia Gupta15-Sep-07 2:26

Sonia Gupta

15-Sep-07 2:26

this is the problem i am not being able to retrieve the image and i am not being able to show the image in the c# form.

Soniagupta1@yahoo.co.in

Re: ole type field in database table pic to show in the c#

sulabh202015-Sep-07 2:37

sulabh2020

15-Sep-07 2:37

commandbutton1.Picture = LoadPicture(recordset !Olefieldname)
OR
Drawing.ImageConverter.ConvertFrom(object)

Try this... i am not sire but i hope from Drawing class the object of ole is get converted to image type and assign to pic control.

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Always be in touch to help about the topic ASP.NET

Re: ole type field in database table pic to show in the c#

sulabh202015-Sep-07 2:39

sulabh2020

15-Sep-07 2:39

try this link this is exact solution for u

http://support.microsoft.com/kb/317701[^]

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Controls in c#

sulabh202014-Sep-07 23:54

sulabh2020

14-Sep-07 23:54

Hi all,

I want to change the property of button on one page "A" from other page "B"

Please suggest me how to do same with out search control.

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Re: Controls in c# [modified]

Colin Angus Mackay15-Sep-07 0:00

Colin Angus Mackay

15-Sep-07 0:00

sulabh2020 wrote:
I want to change the property of button on one page "A" from other page "B"

Please suggest me how to do same with out search control.

I think this article[^] will help you. Since changing a property is just sending it a new value the concept given in the article will work.

However, I'm not sure what you mean by a "search control". There is no search control in .NET.

Sorry, I misread the original post. I thought you were talking about Winforms application as this wasn't in the ASP.NET forum.

-- modified at 6:48 Saturday 15th September, 2007

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Re: Controls in c#

Guffa15-Sep-07 0:28

Guffa

15-Sep-07 0:28

If it's a server control on a web page, then you can't do it. The server controls only exist while the page is being created, and only one page at a time is created for each user. The controls never exist at the same time.

If it's an element on a web page, you have to use Javascript.

If it a control on a form in a program, you need a reference to the form where the control is that you want to change.

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Working When Window From Is Already Shown [modified]

ytubis14-Sep-07 23:42

ytubis

14-Sep-07 23:42

Hi!

I want to create file updater but i want to see the progress in the form (by text labels).

in which Event should i start the application so the Form will be loaded and visible on the screen?

(I have tried Form_Load,Form_Shown,Form_Activated and they all run the application before the form is visible)

maybe the application is fast then how can i wait for the Form to Load and then run the application, should i use theards?How?

I am trying to run this from the Main of the Form but i can not run this because i get that my main function needs to be with an Object Reference.

how can i run it?

Thanks Smile | :)

-- modified at 5:57 Saturday 15th September, 2007

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