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Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing EEmaan27-Apr-07 0:09 EEmaan 27-Apr-07 0:09  Hi! i want to close windows form when i click on any tree node. when i click a tree node, after_select event of tree node is called and in that After_select event i closed my current web form and opened new form but it throws following exception. Disposed object of tree view could not be found. I posted this question two times before also but no satisfactory answer is given. One of member suggested to use IDisposal but i m not getting how to use it. So, can anyone suggest me the solution in detailed form. Thanx Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing Christian Graus27-Apr-07 0:40 Christian Graus 27-Apr-07 0:40  EEmaan wrote: One of member suggested to use IDisposal but i m not getting how to use it IDisposable won't help here, the issue is precisely that you close the form while some code is running, and so the control is disposed while you're trying to use it. You're closing web forms ? Not windows forms ? Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing EEmaan27-Apr-07 0:48 EEmaan 27-Apr-07 0:48  Sorry i wrote Web Form instead of Windows form. Actually i m closing windows form by using this.close(); my piece of code is like private void TreeView1_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e) { Form2 f=new Form2(); f.show(); this.close(); } now plz give me its solution also. Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing Arun.Immanuel27-Apr-07 1:22 Arun.Immanuel 27-Apr-07 1:22  I do not know the exact solution: But, see if this helps U. Locate the line "Application.Run(new Form1());" and enclose it within try catch. try { Application.Run(new Form1()); } catch(Exception exe) { } Regards, Arun Kumar.A Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing Christian Graus27-Apr-07 1:30 Christian Graus 27-Apr-07 1:30  Gosh - it's pretty obvious what's going wrong. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing Christian Graus27-Apr-07 1:23 Christian Graus 27-Apr-07 1:23  OK, I remember this. I told you days ago what to do. You can't do this. Because, when you close this form, you cause the Form2 instance to also be closed/disposed. Instead, make form1 and form2 user controls, put them both on the one form, and switch between them. Also, for goodness sakes, use real variable names and not TreeView1 and Form2. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing EEmaan27-Apr-07 1:39 EEmaan 27-Apr-07 1:39  sorry i m not getting u if u can please follow the following link MBR IT-_NET 247 TreeView and ObjectDisposedException on microsoft_public_dotnet_framework_windowsforms.htm its seems that it is giving me the exact solution of my problem .I did it also but ite not working. Can u guide after viewing this page that what to do. Thanx alot for ur replies Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing Christian Graus27-Apr-07 1:50 Christian Graus 27-Apr-07 1:50  That's not a link. What the page you hoped to link to says does not matter. What you're doing is wrong. Create user controls, lay them out to be your two forms. Put them both on the one form, and then make only one of them visible at a time. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Plzzzzzzzzzzzzzzzzzzzzzzzzzz Help in form closing ChandraRam27-Apr-07 2:57 ChandraRam 27-Apr-07 2:57  EEmaan wrote: Form2 f=new Form2(); You are creating this object within the original form (where the TreeView1 is)... it is available only within the After_Select event. When you close a form, all objects that are part of that form are destroyed and references to those will no longer be valid. Hope this helps. use of assigning the object impelementing a interface to an interface [modified] sishya26-Apr-07 23:45 sishya 26-Apr-07 23:45  Hi guys , I came across a piece of code similar to the below one. public partial class Form1 : Form { private void Form1_Load(object sender, EventArgs e) { ad test = new ad(); Ia id5 = test.testobj(); id5.display() } } public interface Ia { void display(); } public class b : Ia { public void display() { MessageBox.Show("do it man"); } } public class ad { public Ia testobj() { b gh = new b(); return gh; } } My question is why should we typecast object gh to interface Ia in testobj() function as the interface object when we can directly use the object of class b to call display function. Thans in advance, sishya -- modified at 5:54 Friday 27th April, 2007 Re: use of assigning the object impelementing a interface to an interface Christian Graus27-Apr-07 0:02 Christian Graus 27-Apr-07 0:02  Because the point of an interface is that lots of objects can impliment it, and, despite their differences, they can exist as an instance of that interface via the same collection, or variable. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: use of assigning the object impelementing a interface to an interface GregD29-Apr-07 2:08 GregD 29-Apr-07 2:08  In this example, it is not necessary since the example doesn't do anything much. The reason to do so would be if other classes implemented the interface and you want to call display() for a collection of different classes using a common variable of type Ia. GregD (My Blog on software development) Webbased SQL Query Analyzer? Succodimele26-Apr-07 23:37 Succodimele 26-Apr-07 23:37  Hello I've got a problem. In my office, the Port 1435 and 1433 under which my MSSQL Database runs is locked. But I have to use the db for the finish work of my apprentice. Is there something Like a Web based Sql Query Analyzer, where I can run SQL Code? With it I can generate my Stored Procedures and tables? Best regards succo Re: Webbased SQL Query Analyzer? Christian Graus26-Apr-07 23:47 Christian Graus 26-Apr-07 23:47  How does this relate to C# ? You want to go to a website, which creates procs and tables on your local SQL Server, or which hosts one you can play with ? Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Webbased SQL Query Analyzer? Succodimele26-Apr-07 23:56 Succodimele 26-Apr-07 23:56  I search a Web Application, which i can use on my ASP.NET web space. (Something like that: http://www.codeproject.com/aspnet/WebSqlUtility.asp) The Application doesn't have to have an intelligent. I Program my Application on my local Computer and when I'm finish i will put it online. I will create script, which creates the SPs and Tables. The tool have only to exec the SQL-Code. Re: Webbased SQL Query Analyzer? Christian Graus27-Apr-07 0:03 Christian Graus 27-Apr-07 0:03  You didn't answer me - where would the database be, local to you, or local to the tool ? Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Webbased SQL Query Analyzer? Succodimele27-Apr-07 0:58 Succodimele 27-Apr-07 0:58  sorry. local to the tool. Re: Webbased SQL Query Analyzer? Succodimele27-Apr-07 1:41 Succodimele 27-Apr-07 1:41  I found the "SQL Server Web Data Administrator" (http://www.microsoft.com/downloads/details.aspx?FamilyID=c039a798-c57a-419e-acbc-2a332cb7f959&displaylang=en). This is exactly, what I've searched for. Thank you! Need to know how can i create Tree view control with header in WinForm in C#.... Yanshof26-Apr-07 23:10 Yanshof 26-Apr-07 23:10  I dont see in the control that i can do it. I need to create one sun in each node - can i use List View control ? Thanks for any help. Re: Need to know how can i create Tree view control with header in WinForm in C#.... Christian Graus26-Apr-07 23:25 Christian Graus 26-Apr-07 23:25  Yes, you can put icons in the left of the list view control. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Need to know how can i create Tree view control with header in WinForm in C#.... Yanshof27-Apr-07 5:04 Yanshof 27-Apr-07 5:04  What ? can you explain please ? Re: Need to know how can i create Tree view control with header in WinForm in C#.... Christian Graus27-Apr-07 12:44 Christian Graus 27-Apr-07 12:44  If you use a list view, you can associate an image list with it, and for each item, set an index into the image list for the image to show on the left corner. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Need to know how can i create Tree view control with header in WinForm in C#.... Yanshof28-Apr-07 2:47 Yanshof 28-Apr-07 2:47  Thanks, But i need also that each item will be check box - can i do it also ? Re: Need to know how can i create Tree view control with header in WinForm in C#.... Christian Graus28-Apr-07 12:12 Christian Graus 28-Apr-07 12:12  Gosh - talk about feature creep. Yes, it can be done, but I'm not sure if it's built in, or if you need a custom control to do it. Search the code project articles, you should find something there. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum ) Re: Need to know how can i create Tree view control with header in WinForm in C#.... PIEBALDconsult3-May-07 17:00 PIEBALDconsult 3-May-07 17:00  Works for me. With a TreeView anyway, which is my weapon of choice, I prefer it over ListBox and CheckedListBox.

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